MAX1358BETL+ Maxim Integrated Products, MAX1358BETL+ Datasheet

IC DAS 16BIT 40-TQFN

MAX1358BETL+

Manufacturer Part Number
MAX1358BETL+
Description
IC DAS 16BIT 40-TQFN
Manufacturer
Maxim Integrated Products
Type
Data Acquisition System (DAS)r
Datasheet

Specifications of MAX1358BETL+

Resolution (bits)
16 b
Sampling Rate (per Second)
21.84k
Data Interface
Serial
Voltage Supply Source
Analog and Digital
Voltage - Supply
1.8 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
40-TQFN Exposed Pad
Number Of Converters
2
Resolution
16 bit
Interface Type
Serial (4-Wire, SPI, QSPI, Microwire)
Voltage Reference
1.25 V
Supply Voltage (max)
3.6 V
Supply Voltage (min)
1.8 V
Maximum Power Dissipation
2051.3 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Input Voltage
1.8 V to 3.6 V
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX1358B smart data-acquisition system (DAS) is
based on a 16-bit, sigma-delta analog-to-digital converter
(ADC) and system-support functionality for a micro-
processor (µP)-based system. This device integrates
an ADC, DACs, operational amplifiers, internal selec-
table-voltage reference, temperature sensors, analog
switches, a 32kHz oscillator, a real-time clock (RTC)
with alarm, a high-frequency-locked loop (FLL) clock,
four user-programmable I/Os, an interrupt generator,
and 1.8V and 2.7V voltage monitors in a single chip.
The MAX1358B has dual 10:1 differential input multiplex-
ers (muxes) that accept signal levels from 0 to AV
on-chip 1x to 8x programmable-gain amplifier (PGA)
allows measuring low-level signals and reduces external
circuitry required.
The MAX1358B operates from a single +1.8V to +3.6V
supply and consumes only 1.15mA in normal mode and
only 3µA in sleep mode. The MAX1358B has two DACs
with one uncommitted op amp.
The serial interface is compatible with either SPI™/QSPI™
or MICROWIRE™, and is used to power up, configure,
and check the status of all functional blocks.
The MAX1358B is available in a space-saving, 40-pin
TQFN package and is specified over the commercial
(0°C to +70°C) and the extended (-40°C to +85°C) tem-
perature ranges.
19-5159; Rev 1; 12/10
16-Bit, Data-Acquisition System with ADC, DACs,
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
UPIOs, RTC, Voltage Monitors, and Temp Sensor
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Medical Instruments
Industrial Control
Data-Acquisition Systems
________________________________________________________________ Maxim Integrated Products
General Description
Applications
DD
. An
o +1.8V to +3.6V Single-Supply Operation
o Multichannel, 16-Bit, Sigma-Delta ADC
o 10-Bit Force-Sense DACs
o Uncommitted Op Amps
o Dual SPDT and SPST Analog Switches
o Selectable References
o Internal Charge Pump
o System Support
o SPI/QSPI/MICROWIRE, 4-Wire Serial Interface
o Space-Saving (6mm x 6mm x 0.8mm), 40-Pin
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
MAX1358BCTL+
MAX1358BETL+
TQFN Package
1.25V, 2.048V, and 2.5V
10sps to 477sps Programmable Conversion Rate
Self- and System Offset and Gain Calibration
PGA with Gains of 1, 2, 4, or 8
Unipolar and Bipolar Modes
10-Input Differential Multiplexer
RTC and Alarm Register
Internal/External Temperature Sensor
Internal Oscillator with Clock Output
User-Programmable I/O and Interrupt Generator
V
TOP VIEW
*EXPOSED PAD.
DD
PART
Monitors
31
32
33
34
35
36
37
38
39
40
+
30
1
29
2
28
-40°C to +85°C
TEMP RANGE
3
Ordering Information
0°C to +70°C
27
4
MAX1358B
TQFN
26
5
Pin Configuration
25
6
24
7
23
8
22
9
*EP
21
10
PIN-PACKAGE
40 TQFN-EP*
40 TQFN-EP*
Features
20
19
18
17
16
15
14
13
12
11
1

Related parts for MAX1358BETL+

MAX1358BETL+ Summary of contents

Page 1

... Internal Oscillator with Clock Output User-Programmable I/O and Interrupt Generator V Monitors DD o SPI/QSPI/MICROWIRE, 4-Wire Serial Interface o Space-Saving (6mm x 6mm x 0.8mm), 40-Pin TQFN Package PART MAX1358BCTL+ MAX1358BETL+ Applications + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. TOP VIEW *EXPOSED PAD. Features Ordering Information TEMP RANGE PIN-PACKAGE 0° ...

Page 2

... Continuous Current Into Any Pin.........................................50mA Continuous Power Dissipation (T 40-Pin TQFN (derate 25.6mW/°C above +70°C) ....2051.3mW Operating Temperature Range + 0.3V) MAX1358BCTL+ .................................................0°C to +70°C DD MAX1358BETL+ ..............................................-40°C to +85°C Junction Temperature ......................................................+150°C + 0.3V) Storage Temperature Range .............................-65°C to +150° 0.3V) Soldering Temperature (reflow) .......................................+260° ...

Page 3

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL Normal-Mode ...

Page 4

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL Output ...

Page 5

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL Long-Term ...

Page 6

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL Power-Supply ...

Page 7

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL Input ...

Page 8

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL DV ...

Page 9

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL UPIO_ ...

Page 10

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ELECTRICAL CHARACTERISTICS (continued) ( +1.8V to +3.6V REF 10µF, 10µF between CF+ and CF PARAMETER SYMBOL Total ...

Page 11

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 1. Output Noise (Notes 13 and 14) RATE (sps) GAIN = 1 1.75 10 2.92 40 3.23 50 3.60 60 56.06 200 102.36 240 587.06 400 ...

Page 12

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor TIMING CHARACTERISTICS (Figures 1 and 19) ( +1.8V to +3.6V, external 10µF between CF+ and CF MIN ...

Page 13

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor CSH CYC t CSS SCLK t DS DIN t DV DOUT Figure 1. Detailed Serial-Interface Timing DOUT 6kΩ a) FOR ENABLE, HIGH IMPEDANCE TO ...

Page 14

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF AV SUPPLY CURRENT DD vs. AV SUPPLY VOLTAGE DD 2.0 SLEEP MODE: ALL OFF EXCEPT ...

Page 15

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF INTERNAL OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE 2.60 2.55 FLL ENABLED 2.50 2.45 2.40 2.35 FLL ...

Page 16

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF REFERENCE VOLTAGE OUTPUT NOISE (0.1Hz TO 10Hz) MAX1358B toc19 1s/div ADC INL vs. OUTPUT CODE ...

Page 17

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF ADC MAXIMUM INL vs. COMMON-MODE INPUT VOLTAGE 1.25V REF -0.0005 BIPOLAR MODE ...

Page 18

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF AIN_ LEAKAGE CURRENT vs. INPUT VOLTAGE 4.0 3.5 3 +85°C A 2.5 2.0 ...

Page 19

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF DAC INL vs. OUTPUT CODE 0 2.048V REF 0.4 0.3 0.2 0.1 0 ...

Page 20

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF DAC OUTPUT-NOISE DENSITY vs. FREQUENCY 1000 100 10 1 0.01 0.10 FREQUENCY (kHz) DAC LARGE-SIGNAL ...

Page 21

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF OP-AMP OUTPUT VOLTAGE vs. TEMPERATURE 0.8987 UNITY GAIN 1. ...

Page 22

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF SPDT ON-RESISTANCE vs. TEMPERATURE SCM_ 1mA SCM_ 40 ...

Page 23

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V +1.25V REF VOLTAGE SUPERVISOR THRESHOLD vs. TEMPERATURE 3.0 FALLING 2.7 CPOUT SUPERVISOR 2.4 2.1 1.8 DV SUPERVISOR ...

Page 24

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor PIN NAME 1 CLK Clock Output. Default is 2.457MHz output clock for the μC. 2 UPIO2 User-Programmable Input/Output 2. See the UPIO2_CTRL Register section for functionality. 3 ...

Page 25

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor PIN NAME 23 SWA DACA SPST Shunt Switch Input. Connects to OUTA through an SPST switch. 24 FBA DACA Force-Sense Feedback Input. Analog input to mux. 25 ...

Page 26

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Detailed Description The MAX1358B DAS features a multiplexed differential 16-bit ADC, 10-bit force-sense DACs, an RTC with an alarm, a selectable bandgap voltage reference, a signal- detect ...

Page 27

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor and dynamic range constraints. The force-sense DAC provides 10-bit resolution for precise sensor applica- tions. The ADC and DACs both utilize a low-drift 1.25V internal bandgap reference ...

Page 28

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor The MAX1358B contains an on-chip digital lowpass fil- ter that processes the data stream from the modulator 4 4 using a sinc (sinx/x) response. The sinc settling ...

Page 29

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor DV DD LDOE 1.22V OP LDOE LINEAR 1.65V VOLTAGE REGULATOR Figure 5. Linear-Regulator Block Diagram Voltage Supervisors The MAX1358B provides voltage supervisors to monitor DV and CPOUT. ...

Page 30

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor WDTO DV DD 1.8VTH ANALOG 2:1 MUX 2.0VTH LSDE Figure 7. DV Voltage-Supervisor Block Diagram DD CPOUT 2.7VTH CMP 1.25V CPDE CPOUT (2.7V) VOLTAGE MONITOR Figure 8. ...

Page 31

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Enable the watchdog timer by writing the WDE bit in the CLK_CTRL register. After enabling the watch- dog timer, the device asserts RESET for ...

Page 32

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor FLLE FREQ M32K FREQUENCY ERROR COMPARE Figure 12. High-Frequency Clock and FLL Block Diagram Program each UPIO1–UPIO4 as one of the following: • General-purpose input • Power-mode ...

Page 33

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor The temperature equations for the two-current and four- current methods are as follows: Two-current method q )/(n k ln(V BE2 BE1 Four-current method: ...

Page 34

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Single-Pole/Double-Throw (SPDT) Switches The MAX1358B provides two uncommitted SPDT switch- es. Each switch has a typical 35Ω on-resistance. Control the switches through the SW_CTRL register, the PWM ...

Page 35

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor CS SCLK DIN DOUT X = DON’T CARE. Figure 14. Serial-Interface Register Write with 8-Bit Control Word, Followed by a Variable Length Data ...

Page 36

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Register Definitions Table 4. Register Address Map REGISTER CTL START NAME (R/ ) ADC MUX DATA OFFSET CAL ...

Page 37

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Register Bit Descriptions ADC Register (Power-On State: 0000 0000 0000 00XX) MSB ADCE STRT RATE<2:0> The ADC register configures the ADC and starts a conversion. ADCE: ADC ...

Page 38

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 6a. Setting the ADC Conversion Rate* CONTINUOUS SINGLE CONVERSION CONVERSION RATE2 RATE (sps) RATE (sps ...

Page 39

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor MUX Register (Power-On State: 0000 0000) MSB S (ADR0) MUXP3 MUXP2 The MUX register configures the positive and negative mux inputs and can start an ADC conversion. ...

Page 40

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor DATA Register (Power-On State: 0000 0000 0000 0000) MSB ADC15 ADC14 ADC13 ADC7 ADC6 ADC5 ADC<15:0> Analog-to-digital conversion data bits. These 16 bits are the results from ...

Page 41

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor DACA_OP Register (Power-On State: 000X XX00 0000 0000) MSB DAE DBE OP1E DACA7 DACA6 DACA5 Writing to the DACA_OP output register updates DACA on the rising SCLK ...

Page 42

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor REF_SDC Register (Power-On State: 0000 0000) MSB REFV1 REFV0 AOFF The REF_SDC register contains bits to control the refer- ence voltage and signal-detect comparator. REFV<1:0>: Reference buffer ...

Page 43

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor AL_DAY Register (Power-On State: 0000 0000 0000 0000 0000 XXXX) MSB ASEC19 ASEC18 ASEC17 ASEC11 ASEC10 ASEC9 ASEC3 ASEC2 ASEC1 The AL_DAY register stores the second information ...

Page 44

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor CLK_CTRL Register (Power-On State: 00X0 1111 0010 1110) MSB AWE ADE CKSEL2 CKSEL1 CKSEL0 The CLK_CTR register contains the control bits for the RTC alarms and clocks. ...

Page 45

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor HFCE: High-frequency-clock enable bit. Set HFCE = 1 to enable the internal high-frequency clock source, and set HFCE = 0 to disable the high-frequency clock source. If ...

Page 46

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor RTC Register (Power-On State: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000) MSB SEC31 SEC30 SEC29 SEC23 SEC22 SEC21 SEC15 SEC14 SEC13 SEC7 SEC6 SEC5 ...

Page 47

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor PWM_CTRL Register (Power-On State: 0000 0000 00XX XXXX) MSB PWME FSEL2 FSEL1 SPD1 SPD2 The PWM_CTRL register contains control bits for the 8-bit PWM. PWME: PWM-enable bit. ...

Page 48

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor PWM_THTP Register (Power-On State: 0000 0000 0000 0000) MSB PWMTH7 PWMTH6 PWMTH5 PWMTP7 PWMTP6 PWMTP5 The PWM_THTP register contains the bits that set the PWM on-time and ...

Page 49

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 15. Normal-Mode and Sleep-Register Summary REGISTER CIRCUIT BLOCK NAME DESCRIPTION ADC ADC DACA DACA_OP, DACB DACB_OP OP1 Reference Buffer Gain and Enable REF_SDC Signal-Detect Comparator Time-of-Day ...

Page 50

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor SLEEP_CFG Register (Power-On State: 1100 XXXX) MSB SLP (ADR0) SOSCE SCK32E The SLEEP_CFG register allows users to program spe- cific behavior for the 32kHz oscillator, buffer, and ...

Page 51

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor UPIO4_CTRL Register (Power-On State: 0000 1000) MSB UP4MD3 UP4MD2 UP4MD1 The UPIO4_CTRL register configures the UPIO4 pin functionality. UP4MD<3:0>: UPIO4-mode selection bits. These bits configure the mode ...

Page 52

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor UPIO2_CTRL Register (Power-On State: 0000 1000) MSB UP2MD3 UP2MD2 UP2MD1 The UPIO2_CTRL register configures the UPIO2 pin functionality. UP2MD<3:0>: UPIO2-mode selection bits. These bits configure the mode ...

Page 53

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 16. UPIO Mode Configuration UP4MD<3:0>, UP3MD<3:0>, UP2MD<3:0>, UP1MD<3:0> SWA ...

Page 54

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor UPIO_SPI Register (Power-On State: 0000 XXXX) MSB UP4S UP3S UP2S The UPIO_SPI pass-through control register bits map the serial interface signals to the UPIO pins, allowing the ...

Page 55

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor SW_CTRL Register (Power-On State: 0000 00XX) MSB SWA SWB SPDT11 The switch-control register controls the two SPDT switches (SPDT1 and SPDT2) and the DACA output buffer SPST ...

Page 56

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor SPDT2<1:0>: Single-pole double-throw switch 2 control bits. The SPDT2<1:0> bits, the UPIO pins (if config- ured), and the PWM (if configured) control the state of the switch ...

Page 57

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor IMSK Register (Power-On State: 1111 011X 1111 1111) MSB MLDVD MLCPD MADO MUPR4 MUPR3 MUPR2 The IMSK register determines which bits of the STATUS register generate an ...

Page 58

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor hysteresis helps eliminate chatter when running directly off unregulated batteries falls below +1.3V (typ), the DD power-on reset circuitry is enabled and the HYSE bit ...

Page 59

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor ALD: Alarm (day) status bit. ALD = 1 when the value programmed in ASEC<19:0> in the AL_DAY register matches SEC<19:0> in the RTC register. Clear the ALD ...

Page 60

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor POR LO HI XIN, XOUT (32kHz CK32K (32kHz RESET (OPEN DRAIN) LO ...

Page 61

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor V /GAIN REF 1111 1111 1111 1111 FULL-SCALE TRANSITION 1111 1111 1111 1110 1111 1111 1111 1101 1111 1111 1111 1100 V REF 1 LSB = (GAIN ...

Page 62

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor MAX1358B DAC A REF DAC 1.25V REF Figure 23. DAC Unipolar Rail-to-Rail Output Circuit AV and DV provide power to the MAX1358B. The DD ...

Page 63

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor Clocking with a CMOS Signal A CMOS signal can be used to drive 32KIN divid- ed down. Figure example circuit, which ...

Page 64

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor TXD RXD μC MOSI MISO SCK CS1 CS2 MEM RESET INPUT UP INPUT INPUT HIGH-FREQUENCY MICRO CLOCK DOWN X2IN INPUT 32KIN ...

Page 65

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor μ COM<3:0> SEG<23:0> LCDBIAS LCD DRIVERS V SS MEM INPUT UP INPUT DOWN INPUT V SS Figure 28. Electrochemical Meter Application Circuit (Traditional and Counter ...

Page 66

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor For self-calibration, the offset value is the RAW result when the inputs are shorted internally and the gain value is 1/(RAW - OFFSET) with the reference connected ...

Page 67

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor 2N3904 2N3904 Figure 29. Temperature Measurement with Two Remote Sensors Parameter Definitions Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from ...

Page 68

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor MAX1358B DV CPOUT DD SV_ MUX PWM EN_ ALH_ Figure 30. LCD Contrast-Adjustment Application Figure 31. Sensor-Bias Voltage Trim Application 68 ______________________________________________________________________________________ CPOUT 100kΩ 200kΩ UPIO_ (1.8V ...

Page 69

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor MAX1358B SV_ PWM Figure 32. Power-Supply Sleep-Mode Duty-Cycle Control Figure 33. Single-Ended Piezoelectric Buzzer Drive ______________________________________________________________________________________ CPOUT MUX V ...

Page 70

Data-Acquisition System with ADC, DACs, UPIOs, RTC, Voltage Monitors, and Temp Sensor MAX1358B PWM Figure 34. Differential Piezoelectric Buzzer Drive Chip Information PROCESS: BiCMOS 70 ______________________________________________________________________________________ DV CPOUT DD CPOUT(+3.2V) MUX SV_ 0V 1kHz TO 8kHz TYP 1kΩ UPIO_ ...

Page 71

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 71 © 2010 Maxim Integrated Products ...

Related keywords