MAX192AEAP+ADI芯片电子元器件中文版规格手册.pdf资源-CSDN文库

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________________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

♦ 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

MAX192

Low-Power, 8-Channel,

Serial 10-Bit ADC

________________________________________________________________ Maxim Integrated Products

TOP VIEW

DIP/SO/SSOP

SCLK

DIN

SSTRB

DOUT

DGND

AGND

REFADJ

VREFSHDN

AGND

CH7

CH6

CH5

CH4

CH3

CH2

CH1

CH0

MAX192

___________________Pin Configuration

SPI and QSPI are trademarks of Motorola Corp.

Microwire is a trademark of National Semiconductor Corp.

19-0247; Rev. 1; 4/97

PART TEMP. RANGE

MAX192ACPP 0°C to +70°C

MAX192BCPP 0°C to +70°C

MAX192ACWP 0°C to +70°C 20 Wide SO

20 Plastic DIP

PIN-PACKAGE

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

±1/2

±1

±1/2

INL (LSB)

±1

±1/2

±1

MAX192AEPP -40°C to +85°C 20 Plastic DIP ±1/2

MAX192BEPP -40°C to +85°C 20 Plastic DIP ±1

MAX192AEWP -40°C to +85°C 20 Wide SO ±1/2

MAX192BEWP -40°C to +85°C 20 Wide SO ±1

MAX192AEAP -40°C to +85°C 20 SSOP ±1/2

MAX192BEAP -40°C to +85°C 20 SSOP ±1

MAX192AMJP -55°C to +125°C 20 CERDIP ±1/2

MAX192BMJP -55°C to +125°C 20 CERDIP ±1

See last page for Typical Operating Circuit.

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.

MAX192

Low-Power, 8-Channel,

Serial 10-Bit ADC

2 _______________________________________________________________________________________

to AGND........................................................... -0.3V to +6V

AGND to DGND.................................................... -0.3V to +0.3V

CH0–CH7 to AGND, DGND ...................... -0.3V to (V

+ 0.3V)

CH0–CH7 Total Input Current.......................................... ±20mA

VREF to AGND .......................................... -0.3V to (V

+ 0.3V)

REFADJ to AGND...................................... -0.3V to (V

+ 0.3V)

Digital Inputs to DGND.............................. -0.3V to (V

+ 0.3V)

Digital Outputs to DGND........................... -0.3V to (V

+ 0.3V)

Digital Output Sink Current .................................................25mA

Continuous Power Dissipation (T

= +70°C)

Plastic DIP (derate 11.11mW/°C above +70°C) ......... 889mW

SO (derate 10.00mW/°C above +70°C)...................... 800mW

SSOP (derate 8.00mW/°C above +70°C) ................... 640mW

CERDIP (derate 11.11mW/°C above +70°C).............. 889mW

Operating Temperature Ranges

MAX192_C_P ..................................................... 0°C to +70°C

MAX192_E_P .................................................. -40°C to +85°C

MAX192_MJP ............................................... -55°C to +125°C

Storage Temperature Range ............................ -60°C to +150°C

Lead Temperature (soldering, 10sec) ............................ +300°C

ELECTRICAL CHARACTERISTICS

= 5V ±5%, f

CLK

= 2.0MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (133ksps), 4.7µF capacitor at VREF pin,

= T

MIN

to T

MAX,

unless otherwise noted. Typical values are at T

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ABSOLUTE MAXIMUM RATINGS

MAX192A

-3dB rolloff

65kHz, V

= 4.096Vp-p (Note 3)

External reference, 4.096V

MAX192B

No missing codes over temperature

External reference, 4.096V

CONDITIONS

kHz800Full-Power Bandwidth

MHz4.5Small-Signal Bandwidth

dB-75Channel-to-Channel Crosstalk

dB70SFDRSpurious-Free Dynamic Range

dB-70THD

Total Harmonic Distortion

(up to the 5th harmonic)

dB66SINADSignal-to-Noise + Distortion Ratio

±1/2

Bits10Resolution

LSB±0.1

Channel-to-Channel

Offset Matching

ppm/°C±0.8Gain Temperature Coefficient

LSB

±1

Relative Accuracy (Note 2)

LSB±1DNLDifferential Nonlinearity

LSB±2Offset Error

LSB±2Gain Error

UNITSMIN TYP MAXSYMBOLPARAMETER

Internal clock 5.5 10

Conversion Time (Note 4) t

CONV

External clock, 2MHz, 12 clocks/conversion 6

µs

Track/Hold Acquisition Time t

1.5 µs

Aperture Delay 10 ns

Aperture Jitter <50 ps

Internal Clock Frequency 1.7 MHz

DC ACCURACY (Note 1)

DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 4.096Vp-p, 133ksps, 2.0MHz external clock)

CONVERSION RATE

Note 1: Tested at V

= 5.0V; single-ended, unipolar.

Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has

been calibrated.

Note 3: Grounded on-channel; sine wave applied to all off channels.

Note 4: Conversion time defined as the number of clock cycles times the clock period; clock has 50% duty cycle.

Note 5: Guaranteed by design. Not subject to production testing.

Note 6: The common-mode range for the analog inputs is from AGND to V

Note 7: Sample tested to 0.1% AQL.

Note 8: External load should not change during conversion for specified accuracy.

Note 9: Measured at V

SUPPLY

+ 5% and V

SUPPLY

- 5% only.

MAX192

Low-Power, 8-Channel,

Serial 10-Bit ADC

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= 5V ±5%, f

CLK

= 2.0MHz, external clock (50% duty cycle), 15 clocks/conversion cycle (133ksps), 4.7µF capacitor at VREF pin,

= T

MIN

to T

MAX,

unless otherwise noted. Typical values are at T

= +25°C.)

SINK

= 16mA

SINK

= 5mA

SHDN = open

SHDN = 0V

SHDN = V

(Note 5)

= 0V or V

CONDITIONS

0.3

Output Voltage Low

0.4

nA-100 100

SHDN Max Allowed Leakage,

Mid Input

V2.75V

FLT

SHDN Voltage, Floating

V1.5 V

- 1.5V

SHDN Input Mid Voltage

µA-4.0I

INL

SHDN Input Current, Low

µA4.0I

INH

SHDN Input Current, High

V0.5V

INL

SHDN Input Low Voltage

- 0.5V

INH

SHDN Input High Voltage

pF15C

DIN,SCLK, CS Input Capacitance

µA±1I

DIN, SCLK, CS Input Leakage

V0.15V

HYST

DIN, SCLK, CS Input Hysteresis

V0.8V

INL

DIN,SCLK, CS Input Low Voltage

V2.4V

INH

DIN,SCLK, CS Input High Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

Output Voltage High V

SOURCE

= 1mA 4 V

Three-State Leakage Current I

CS = 5V

±10 µA

Three-State Leakage Capacitance C

OUT

CS = 5V (Note 5)

15 pF

Positive Supply Voltage V

5 ±5% V

Operating mode 1.5 2.5 mA

Fast power-down 30 70Positive Supply Current I

Full power-down 2 10

µA

Positive Supply Rejection

(Note 9)

PSR

= 5V ±5%; external reference, 4.096V;

full-scale input

±0.06 ±0.5 mV

EXTERNAL REFERENCE AT REFADJDIGITAL INPUTS (DIN, SCLK,

–

—

–

—

–

)

DIGITAL OUTPUTS (DOUT, SSTRB)

POWER REQUIREMENTS

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