MAX192BCWP+T Maxim Integrated Products, MAX192BCWP+T Datasheet

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MAX192BCWP+T

MAX192BCWP+T
Manufacturer Part Number	MAX192BCWP+T
Description	IC ADC 10BIT SERIAL 20-SOIC
Manufacturer	Maxim Integrated Products
Type	Data Acquisition System (DAS), ADC
MAX192BCWP+T datasheets	1. MAX192BEWP.pdf (24 pages)

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Specifications of MAX192BCWP+T
Resolution (bits)	10 b	Sampling Rate (per Second)	133k
Data Interface	Serial	Voltage Supply Source	Single Supply
Voltage - Supply	±5V	Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount	Package / Case	20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status	Lead free / RoHS Compliant

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19-0247; Rev. 1; 4/97

________________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

Automotive

Pen-Entry Systems

Consumer Electronics

Portable Data Logging

Robotics

Battery-Powered Instruments, Battery

Management

Medical Instruments

____________________________Features

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.

Low-Power, 8-Channel,

Serial 10-Bit ADC

8-Channel Single-Ended or 4-Channel Differential

Inputs

Single +5V Operation

Low Power: 1.5mA (operating)

2µA (power-down)

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)

_______________Ordering Information

PART

TEMP. RANGE

PIN-PACKAGE

MAX192ACPP

0°C to +70°C

20 Plastic DIP

MAX192BCPP

0°C to +70°C

20 Plastic DIP

MAX192ACWP

0°C to +70°C

20 Wide SO

MAX192BCWP

0°C to +70°C

20 Wide SO

MAX192ACAP

0°C to +70°C

20 SSOP

MAX192BCAP

0°C to +70°C

20 SSOP

MAX192AEPP

-40°C to +85°C

20 Plastic DIP

MAX192BEPP

-40°C to +85°C

20 Plastic DIP

MAX192AEWP -40°C to +85°C

20 Wide SO

MAX192BEWP -40°C to +85°C

20 Wide SO

MAX192AEAP

-40°C to +85°C

20 SSOP

MAX192BEAP

-40°C to +85°C

20 SSOP

MAX192AMJP

-55°C to +125°C

20 CERDIP

MAX192BMJP

-55°C to +125°C

20 CERDIP

___________________Pin Configuration

TOP VIEW

CH0

CH1

CH2

MAX192

CH3

CH4

CH5

CH6

CH7

AGND

SHDN

DIP/SO/SSOP

INL (LSB)

±1/2

±1

±1/2

±1

±1/2

±1

±1/2

±1

±1/2

±1

±1/2

±1

±1/2

±1

SCLK

DIN

SSTRB

DOUT

DGND

AGND

REFADJ

VREF

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MAX192BCWP+T 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 ...

MAX192BCWP+T 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 ...

MAX192BCWP+T

MAX192BCWP+T

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MAX192BCWP+T Summary of contents

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