MAX1359BETL+ Maxim Integrated Products, MAX1359BETL+ Datasheet

IC DAS 16BIT 40-TQFN

MAX1359BETL+

Manufacturer Part Number
MAX1359BETL+
Description
IC DAS 16BIT 40-TQFN
Manufacturer
Maxim Integrated Products
Type
Data Acquisition System (DAS)r
Datasheets

Specifications of MAX1359BETL+

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 MAX1359B smart data-acquisition systems (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, DAC, two operational amplifiers, internal
1.25V/2.048V/2.5V selectable 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 MAX1359B has dual 10:1 differential input multi-
plexers (muxes) that accept signal levels from 0 to
AV
er (PGA) measures low-level signals and reduces exter-
nal circuitry required.
The MAX1359B operates from a single +1.8V to +3.6V
supply and consumes only 1.4mA in normal mode and
only 6.1µA in sleep mode.
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 MAX1359B 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.
19-3710; Rev 2; 8/10
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
DD
16-Bit, Data-Acquisition System with ADC, DAC,
. An on-chip 1x to 8x programmable-gain amplifi-
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Medical Instruments
Industrial Control
Data-Acquisition Systems
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o +1.8V to +3.6V Single-Supply Operation
o Multichannel 16-Bit Sigma-Delta ADC
o 10-Bit Force-Sense DAC
o Uncommitted Op Amps
o Dual SPDT Analog Switches
o 1.25V, 2.048V, or 2.5V Selectable Voltage
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 TQFN
**
+ Denotes a lead(Pb)-free/RoHS-compliant package.
MAX1359BETL+
MAX1359BCTL+
EP = Exposed pad.
Reference
Package
10sps to 512sps 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
Real Time Clock and Alarm Register
Internal/External Temperature Sensor
Internal Oscillator with Clock Output
User-Programmable I/O and Interrupt Generator
V
DD
PART
Monitors
31
32
33
34
35
36
37
38
39
40
30
1
29
2
-40°C to +85°C
28
TEMP RANGE
3
Ordering Information
0°C to +70°C
27
4
MAX1359B
TQFN
26
5
Pin Configuration
25
6
24
7
23
8
22
9
PIN-PACKAGE
40 TQFN-EP**
40 TQFN-EP**
21
10
Features
20
19
18
17
16
15
14
13
12
11
1

Related parts for MAX1359BETL+

MAX1359BETL+ Summary of contents

Page 1

... Internal/External Temperature Sensor 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 MAX1359BETL+ MAX1359BCTL+ Applications EP = Exposed pad Denotes a lead(Pb)-free/RoHS-compliant package. Features Ordering Information TEMP RANGE PIN-PACKAGE -40° ...

Page 2

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ABSOLUTE MAXIMUM RATINGS AV to AGND .........................................................-0. DGND.........................................................-0. ............................................................- AGND to DGND.....................................................-0.3V ...

Page 3

Data-Acquisition System with ADC, DAC, 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, DAC, 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, DAC, 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, DAC, 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, DAC, 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, DAC, 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, DAC, 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, DAC, 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, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 1. Output Noise (Notes 12, 13, and 14) RATE (sps) GAIN = 1 10 1.820 40 3.845 50 3.065 60 2.873 200 4.525 240 6.502 400 ...

Page 12

Data-Acquisition System with ADC, DAC, 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, DAC, 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, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V SUPPLY CURRENT DD vs. TEMPERATURE 700 NORMAL MODE CLK BUFFER DISABLED 600 DV = 3.0V ...

Page 15

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V INTERNAL OSCILLATOR FREQUENCY vs. TEMPERATURE 2.8 2.7 C 2.6 2.5 2 2.3 2.2 CLK ...

Page 16

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V REFERENCE VOLTAGE OUTPUT NOISE (0.1Hz TO 10Hz) MAX1359B toc22 V = +1.25V REF AV = +1.8V ...

Page 17

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V DAC DNL vs. OUTPUT CODE 0.20 0.15 0.10 0.05 0 -0.05 -0. 2.5V DD ...

Page 18

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V DAC LARGE-SIGNAL OUTPUT STEP RESPONSE V = +1.25V REF AV = +3.0V DD 40µs/div OP-AMP INPUT ...

Page 19

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V OP-AMP OUTPUT VOLTAGE vs. OUTPUT SOURCE CURRENT 1.80 1.75 1.70 1.65 UNITY GAIN ...

Page 20

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V SPDT ON-RESISTANCE vs. TEMPERATURE -40 -15 TEMPERATURE ...

Page 21

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor ( 1.8V, REF = +1.25V VOLTAGE SUPERVISOR THRESHOLD vs. TEMPERATURE 0.10 0.05 DV SUPERVISOR DD 0 -0.05 -0.10 CPOUT SUPERVISOR -0.15 ...

Page 22

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor PIN NAME 1 CLK Clock Output. Default is 2.457MHz output clock for µC. 2 UPIO2 User-Programmable Input/Output 2. See the UPIO2_CTRL Register section for functionality. 3 UPIO3 ...

Page 23

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

Page 24

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Detailed Description The MAX1359B DAS features a multiplexed differential 16-bit ADC, 10-bit force-sense DAC, an RTC with an alarm, a selectable bandgap voltage reference, a signal- detect ...

Page 25

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor the system or cause an interrupt at a predefined time. The power-supply voltage monitor detects when DV falls below a trip threshold voltage of +1.8V, asserting RESET. ...

Page 26

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor The output data rate for the digital filter corresponds with the positioning of the first notch of the filter’s fre- quency response. The notches of the SINC ...

Page 27

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor An internal clock drives the charge-pump clock and ADC clock. The charge pump delivers a maximum 10mA of current to external devices. The droop and the ripple ...

Page 28

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor CPOUT CPDE 2.7VTH CMP 1.25V CPDE CPOUT (2.7V) VOLTAGE MONITOR Figure 8. CPOUT Voltage-Supervisor Block Diagram Crystal Oscillator The on-chip oscillator requires an external crystal (or resonator) ...

Page 29

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor POR PULSES HIGH DURING POWER-UP. WDW PULSES HIGH DURING WATCHDOG REGISTER WRITE. 32K WDE Figure 11. Watchdog Timer Block Diagram FLLE FREQ M32K FREQUENCY ERROR COMPARE Figure ...

Page 30

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Temperature Sensor The internal temperature sensor measures die tempera- ture and the external temperature sensor measures remote temperatures. Use the internal temperature sen- sor or external temperature ...

Page 31

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor 3) Repeat steps 1 and 2 with The measured temperature is defined as follows − − ...

Page 32

Data-Acquisition System with ADC, DAC, 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 33

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Register Definitions Table 4. Register Address Map REGISTER CTL START NAME (R/W) ADC 1 R/W 0 MUX 1 R/W 0 DATA OFFSET CAL 1 ...

Page 34

Data-Acquisition System with ADC, DAC, 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 35

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

Page 36

Data-Acquisition System with ADC, DAC, 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 37

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 9. Selecting the Negative MUX Inputs NEGATIVE MUX INPUT TEMP- SNO2 OUTA SCM2 OUT2 SNC2 OUT1 AIN2 REF AGND Open X = Don’t care. DATA Register ...

Page 38

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor GAIN CAL Register (Power-On State: 1000 0000 0000 0000 0000 0000) MSB GAIN23 GAIN22 GAIN21 GAIN15 GAIN14 GAIN13 GAIN7 GAIN6 GAIN5 GAIN<23:0>: Gain-calibration bits. The data format ...

Page 39

Data-Acquisition System with ADC, DAC, 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 40

Data-Acquisition System with ADC, DAC, 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 41

Data-Acquisition System with ADC, DAC, 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 42

Data-Acquisition System with ADC, DAC, 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 43

Data-Acquisition System with ADC, DAC, 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 44

Data-Acquisition System with ADC, DAC, 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 ...

Page 45

Data-Acquisition System with ADC, DAC, 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 46

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Table 15. Normal-Mode and Sleep-Register Summary REGISTER CIRCUIT BLOCK NAME DESCRIPTION ADC ADC DACA/OP3 DACA_OP, DACB/OP2 DACB_OP OP1 Reference Buffer Gain and Enable REF_SDC Signal-Detect Comparator Time-of-Day ...

Page 47

Data-Acquisition System with ADC, DAC, 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 48

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

Page 49

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

Page 50

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

Page 51

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

Page 52

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor SW_CTRL Register (Power-On State: 0000 00XX) MSB SWA 0 SPDT11 The switch-control register controls the two SPDT switches (SPDT1 and SPDT2) and the DACA output buffer SPST ...

Page 53

Data-Acquisition System with ADC, DAC, 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 54

Data-Acquisition System with ADC, DAC, 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 55

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor nominally and the rising threshold is +2.0V nominally. The hysteresis helps eliminate chatter when running directly off unregulated batteries falls below +1.3V (typ), the DD ...

Page 56

Data-Acquisition System with ADC, DAC, 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 57

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor 2 1. POR LO HI XIN, XOUT (32kHz CK32K (32kHz RESET (OPEN-DRAIN) LO ...

Page 58

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Exit sleep mode and enter normal mode by one of the following methods: • With the SHDN bit = 0, deassert the SLEEP or SLEEP function on ...

Page 59

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor V /GAIN REF 0111 1111 1111 1111 0111 1111 1111 1110 0111 1111 1111 1101 V REF 1 LSB = x 2 (GAIN x 65,536) 0000 0000 ...

Page 60

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor V REF R 1 FB_ DAC_ OUT_ MAX1359B Figure 24. DAC Bipolar Output Circuit Optical Reflectometry Application with Dual LED and Single Photodiode Figure 25 illustrates the ...

Page 61

Data-Acquisition System with ADC, DAC, 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 62

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor 2N3904 2N3904 Figure 26. Temperature Measurement with Two Remote Sensors Figure 27. Programmable-Gain Instrumentation Amplifier 62 ______________________________________________________________________________________ AIN1 MUX PGA 16-BIT ADC AGND ...

Page 63

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor DV DD MAX1359B SV_ PWM ALH_ Figure 28. LCD Contrast-Adjustment Application MAX1359B SV_ PWM Figure 29. Power-Supply Sleep-Mode Duty-Cycle Control ______________________________________________________________________________________ CPOUT CPOUT MUX 100kΩ 200kΩ UPIO_ ...

Page 64

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor MAX1359B PWM Figure 30. Single-Ended Piezoelectric Buzzer Drive MAX1359B PWM Figure 31. Differential Piezoelectric Buzzer Drive 64 ______________________________________________________________________________________ DV CPOUT DD SV_ MUX CPOUT(+3.2V) 1kΩ UPIO_ ALH_ ...

Page 65

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Grounding and Layout For best performance, use PC boards with separate analog and digital ground planes. Design the PC board so that the analog and digital sec- ...

Page 66

Data-Acquisition System with ADC, DAC, UPIOs, RTC, Voltage Monitors, and Temp Sensor Chip Information PROCESS: BiCMOS 66 ______________________________________________________________________________________ Package Information For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” ...

Page 67

... 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 ____________________ 67 © 2010 Maxim Integrated Products ...

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