MAX192BEAP+ Maxim Integrated Products, MAX192BEAP+ Datasheet

IC ADC 10BIT SERIAL 20-SSOP

MAX192BEAP+

Manufacturer Part Number
MAX192BEAP+
Description
IC ADC 10BIT SERIAL 20-SSOP
Manufacturer
Maxim Integrated Products
Type
Data Acquisition System (DAS), ADCr
Datasheet

Specifications of MAX192BEAP+

Resolution (bits)
10 b
Sampling Rate (per Second)
133k
Data Interface
Serial
Voltage Supply Source
Single Supply
Voltage - Supply
±5V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SSOP
Package
20SSOP
Resolution
10 Bit
Sampling Rate
133 KSPS
Architecture
SAR
Number Of Adcs
1
Number Of Analog Inputs
8|4
Digital Interface Type
Serial (4-Wire, SPI, QSPI, Microwire)
Input Type
Voltage
Polarity Of Input Voltage
Unipolar|Bipolar
Conversion Rate
133 KSPs
Interface Type
Serial
Voltage Reference
Internal 4.096 V or External
Supply Voltage (max)
5 V
Maximum Power Dissipation
640 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
________________General Description
The MAX192 is a low-cost, 10-bit data-acquisition system
that combines an 8-channel multiplexer, high-bandwidth
track/hold, and serial interface with high conversion
speed and ultra-low power consumption. The device
operates with a single +5V supply. The analog inputs are
software configurable for single-ended and differential
(unipolar/bipolar) operation.
The 4-wire serial interface connects directly to SPI™,
QSPI™, and Microwire™ devices, without using external
logic. A serial strobe output allows direct connection to
TMS320 family digital signal processors. The MAX192
uses either the internal clock or an external serial-
interface clock to perform successive approximation A/D
conversions. The serial interface can operate beyond
4MHz when the internal clock is used. The MAX192 has
an internal 4.096V reference with a drift of ±30ppm typi-
cal. A reference-buffer amplifier simplifies gain trim and
two sub-LSBs reduce quantization errors.
The MAX192 provides a hardwired SHDN pin and two
software-selectable power-down modes. Accessing the
serial interface automatically powers up the device, and
the quick turn-on time allows the MAX192 to be shut
down between conversions. By powering down
between conversions, supply current can be cut to
under 10µA at reduced sampling rates.
The MAX192 is available in 20-pin DIP and SO pack-
ages, and in a shrink-small-outline package (SSOP)
that occupies 30% less area than an 8-pin DIP. The
data format provides hardware and software compati-
bility with the MAX186/MAX188. For anti-aliasing filters,
consult the data sheets for the MAX291–MAX297.
________________________Applications
____________________________Features
19-0247; Rev. 1; 4/97
See last page for Typical Operating Circuit.
SPI and QSPI are trademarks of Motorola Corp.
Microwire is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
Automotive
Pen-Entry Systems
Consumer Electronics
Portable Data Logging
Robotics
Battery-Powered Instruments, Battery
Medical Instruments
Management
________________________________________________________________ Maxim Integrated Products
_______________Ordering Information
___________________Pin Configuration
Low-Power, 8-Channel,
MAX192ACPP
MAX192BCPP
MAX192ACWP
MAX192BCWP
MAX192ACAP
MAX192BCAP
MAX192AEPP
MAX192BEPP
MAX192AEWP -40°C to +85°C
MAX192BEWP -40°C to +85°C
MAX192AEAP
MAX192BEAP
MAX192AMJP
MAX192BMJP
8-Channel Single-Ended or 4-Channel Differential
Inputs
Single +5V Operation
Low Power: 1.5mA (operating)
Internal Track/Hold, 133kHz Sampling Rate
Internal 4.096V Reference
4-Wire Serial Interface is Compatible
with SPI, QSPI, Microwire, and TMS320
20-Pin DIP, SO, SSOP Packages
Pin-Compatible 12-Bit Upgrade (MAX186/MAX188)
PART
TOP VIEW
Serial 10-Bit ADC
AGND
SHDN
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
TEMP. RANGE
2µA (power-down)
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
10
1
2
3
4
5
6
7
8
9
DIP/SO/SSOP
MAX192
PIN-PACKAGE
20 Plastic DIP
20 Plastic DIP
20 Wide SO
20 Wide SO
20 SSOP
20 SSOP
20 Plastic DIP
20 Plastic DIP
20 Wide SO
20 Wide SO
20 SSOP
20 SSOP
20 CERDIP
20 CERDIP
20
19
18
17
16
15
14
13
12
11
V
SCLK
CS
DIN
SSTRB
DOUT
DGND
AGND
REFADJ
VREF
DD
INL (LSB)
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
1

Related parts for MAX192BEAP+

MAX192BEAP+ Summary of contents

Page 1

... See last page for Typical Operating Circuit. SPI and QSPI are trademarks of Motorola Corp. Microwire is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468. ...

Page 2

Low-Power, 8-Channel, Serial 10-Bit ADC ABSOLUTE MAXIMUM RATINGS V to AGND........................................................... -0.3V to +6V DD AGND to DGND.................................................... -0.3V to +0.3V CH0–CH7 to AGND, DGND ...................... -0. CH0–CH7 Total Input Current.......................................... ±20mA VREF to AGND .......................................... -0.3V to ...

Page 3

ELECTRICAL CHARACTERISTICS (continued ±5 2.0MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (133ksps), 4.7µF capacitor at VREF pin, DD CLK unless otherwise noted. Typical values are ...

Page 4

Low-Power, 8-Channel, Serial 10-Bit ADC ELECTRICAL CHARACTERISTICS (continued ±5 2.0MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (133ksps), 4.7µF capacitor at VREF pin, DD CLK unless otherwise noted. Typical ...

Page 5

TIMING CHARACTERISTICS ( ±5 unless otherwise noted MIN MAX PARAMETER SYMBOL Acquisition Time t DIN to SCLK Setup t DIN to SCLK Hold t SCLK Fall to Output Data Valid ...

Page 6

Low-Power, 8-Channel, Serial 10-Bit ADCs PIN NAME 1–8 CH0–CH7 Sampling Analog Inputs Analog Ground. Also IN- Input for single-enabled conversions. Connect both AGND pins AGND analog ground. Three-Level Shutdown Input. Pulling SHDN low shuts the MAX192 down ...

Page 7

CS 19 SCLK INPUT INT 17 DIN SHIFT CLOCK REGISTER CONTROL 10 SHDN LOGIC 1 CH0 2 CH1 3 CH2 4 ANALOG CH3 T/H INPUT 5 CH4 CLOCK MUX 6 CH5 IN SAR 7 CH6 ADC 8 CH7 REF ...

Page 8

Low-Power, 8-Channel, Serial 10-Bit ADC The T/H enters its tracking mode on the falling clock edge after the fifth bit of the 8-bit control word has been shifted in. The T/H enters its hold mode on the falling clock edge ...

Page 9

Table 2. Channel Selection in Differential Mode (SGL/DIF = 0) SEL2 SEL1 SEL0 CH0 – ...

Page 10

Low-Power, 8-Channel, Serial 10-Bit ADC Table 4a. Unipolar Full Scale and Zero Scale ZERO REFERENCE SCALE Internal Reference 0V at REFADJ 0V External Reference at VREF 0V Table 4b. Differential Bipolar Full Scale, Zero Scale, and Negative Full Scale NEGATIVE ...

Page 11

MAX192 0V TO 4.096V CH7 ANALOG 0.01 F INPUT REFADJ VREF C2 C1 0.01 F 4.7 F +2.5V +2.5V REFERENCE * FULL-SCALE ANALOG INPUT, CONVERSION RESULT = $FFF (HEX) **OPTIONAL. A POTENTIOMETER MAY BE USED IN PLACE OF THE REFERENCE ...

Page 12

Low-Power, 8-Channel, Serial 10-Bit ADC CS t ACQ SCLK 1 4 RB1 UNI/ SGL/ DIN START SEL2 SEL1 SEL0 PD1 BIP DIF SSTRB RB1 DOUT ACQUISITION IDLE A/D STATE 1.5µs (CLK = 2MHz) Figure 6. 24-Bit External Clock Mode Conversion ...

Page 13

CS t SDV SSTRB SCLK Figure 8. External Clock Mode SSTRB Detailed Timing CS SCLK UNI/ DIN START SEL2 SEL1 SEL0 BIP SSTRB DOUT IDLE A/D STATE Figure 9. Internal Clock Mode Timing Most microcontrollers require ...

Page 14

Low-Power, 8-Channel, Serial 10-Bit ADC CS t CSH SSTRB SCLK PD0 CLOCK IN Figure 10. Internal Clock Mode SSTRB Detailed Timing SCLK DIN S CONTROL BYTE 0 DOUT SSTRB Figure 11a. External Clock Mode, 15 Clocks/Conversion Timing ...

Page 15

CLOCK INTERNAL MODE SHDN SETS EXTERNAL CLOCK MODE DIN DOUT DATA VALID ( DATA BITS) MODE POWERED UP Figure 12a. Timing Diagram Power-Down Modes, External Clock CLOCK MODE SETS INTERNAL ...

Page 16

Low-Power, 8-Channel, Serial 10-Bit ADC Table 5. Worst-Case Power-Up Delay Times Reference Reference- Buffer Buffer Compensation Mode Enabled Internal Enabled Internal Enabled External Enabled External Disabled Disabled Table 6. Software Shutdown and Clock Mode PD1 PD0 Device Mode 1 1 ...

Page 17

DIN FULLPD 2.5V REFADJ 0V 4V VREF 0V Figure 13. FULLPD/FASTPD Power-Up Sequence FULL POWER-DOWN 1000 8 CHANNELS 100 1 CHANNEL 10 2ms FASTPD WAIT 400kHz EXTERNAL CLOCK INTERNAL COMPENSATION 1 0 100 200 300 CONVERSIONS PER ...

Page 18

Low-Power, 8-Channel, Serial 10-Bit ADC OUTPUT CODE FULL-SCALE TRANSITION 111 110 101 011 010 001 00 ...

Page 19

F 24k Figure 17. Reference-Adjust Circuit Layout, Grounding, Bypassing For best performance, use printed circuit boards. Wire-wrap boards are not recommended. Board layout should ensure that digital and analog signal lines are separated from each other. ...

Page 20

Low-Power, 8-Channel, Serial 10-Bit ADC 1 CH0 2 CH1 3 CH2 4 ANALOG CH3 MAX192 INPUTS 5 CH4 SSTRB 6 CH5 7 CH6 8 CH7 9 AGND REFADJ 10 SHDN Figure 19. MAX192 QSPI Connection TMS320 to MAX192 Interface Figure ...

Page 21

... This is a shell program for using a stand-alone 68HC16 without any external memory. The internal 1K RAM * is put into bank $0F to maintain 68HC11 code compatibility. This program was written with software * provided in the Motorola 68HC16 Evaluation Kit Roger J.A. Chen, Applications Engineer * MAXIM Integrated Products * November 20, 1992 * ****************************************************************************************************************************************************** INCLUDE ‘EQUATES.ASM’ ;Equates for common reg addrs INCLUDE ‘ ...

Page 22

Low-Power, 8-Channel, Serial 10-Bit ADC LDD #$0800 STD SPCR2 ;set ENDQP to $8 for 9 transfers ***** Initialize QSPI Command RAM ***** LDAA #$80 ;CONT=1,BITSE=0,DT=0,DSCK=0,PCS0=ACTIVE STAA $FD40 ;store first byte in COMMAND RAM LDAA #$C0 ;CONT=1,BITSE=1,DT=0,DSCK=0,PCS0=ACTIVE STAA $FD41 STAA $FD42 ...

Page 23

Figure 21. QSPI Assembly-Code Timing XF CS CLKX SCLK TMS320 CLKR DX DIN DR DOUT FSR SSTRB Figure 22. MAX192 to TMS320 Serial Interface CS SCLK DIN START SEL2 SEL1 SSTRB DOUT Figure 23. TMS320 Serial-Interface Timing Diagram ______________________________________________________________________________________ Low-Power, ...

Page 24

... 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. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1997 Maxim Integrated Products ...

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