MAX132EWGmaxim美信芯片电子元器件中文版规格手册.pdf

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_______________General Description

The MAX132 is a CMOS, 18-bit plus sign, serial-output,

analog-to-digital converter (ADC). Multi-slope integra-

tion provides high-resolution conversions in less time

than standard integrating ADCs, allowing operation up

to 100 conversions per second. Low conversion noise

provides guaranteed operation with ±512mV full-scale

input range (2µV/LSB). A simple 4-wire serial interface

connects easily to all common microprocessors, and

twos-complement output coding simplifies bipolar mea-

surements. Typical supply current is only 60µA and is

reduced to 1µA in sleep mode. Four serially pro-

grammed digital outputs can be used to control an

external multiplexer or programmable-gain amplifier.

The MAX132 comes in 24-pin narrow DIP and wide SO

packages, and is available in commercial and extend-

ed temperature grades.

High resolution, compact size, and low power make this

device ideal for data loggers, weigh scales, data-acqui-

sition systems, and panel meters.

________________________Applications

Remote Data Acquisition

Battery-Powered Instruments

Industrial Process Control

Transducer-Signal Measurement

Pressure, Flow, Temperature, Voltage

Current, Resistance, Weight

____________________________Features

♦ Low Supply Current:

60µA (Normal Operation)

1µA (Sleep-Mode Operation)

♦ ±0.006% FSR Accuracy at 16 Conv/sec

♦ Low Noise: 15µV

RMS

♦ Serial I/O Interface with Programmed Output for

Mux and PGA

♦ Performs up to 100 Conv/sec

♦ ±2pA Input Current

♦ 50Hz/60Hz Rejection

MAX132

±18-Bit ADC with Serial Interface

________________________________________________________________

Maxim Integrated Products

V+

BUF OUT

INT OUT

INT IN

SCLK

DOUT

DIN

TOP VIEW

CREF-

CREF+

REF+

REF-

OSC1

OSC2

AGND

IN LO

IN HI

V-

DGND

EOC

DIP/SO

MAX132

__________________Pin Configuration

MAX132

CREF- CREF+

602k

SCLK

DOUT

DIN

EOC

-5V

±512mV INPUT

BUF OUT

INT OUT

INT IN

4.7nF

REF+

REF-

AGND

IN LO

IN HI

V-

V+

DGND

OSC2OSC1

+5V

________________Functional Diagram

Call toll free 1-800-998-8800 for free samples or literature.

19-0009; Rev 2; 8/95

PART

MAX132CNG

MAX132CWG

MAX132C/D 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

24 Narrow Plastic DIP

24 Wide SO

Dice*

EVALUATION KIT MANUAL

FOLLOWS DATA SHEET

______________Ordering Information

* Contact factory for dice specifications.

** Contact factory for availability and processing to MIL-STD-883.

MAX132ENG

MAX132EWG

MAX132MRG -55°C to +125°C

-40°C to +85°C

-40°C to +85°C 24 Narrow Plastic DIP

24 Wide SO

24 Narrow CERDIP**

MAX132

±18-Bit ADC with Serial Interface

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V+ = 5V, V- = -5V, DGND = AGND = IN LO = REF- = 0V, REF+ = 545mV, R

INT

= 602kΩ, C

INT

= 0.0047µF, C

REF

= 0.1µF,

CLK

= 32,768Hz, 60Hz mode, T

= T

MIN

to T

MAX

, unless otherwise noted.)

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.

Supply Voltage

V+ to DGND ..............................................-0.3V < V+ < +6.0V

V- to DGND ................................................+0.3V < V- < -9.0V

V+ to V-............................................................................+15V

Analog Input Voltage (any input).....................................V+ to V-

Digital Input Voltage .....................(DGND - 0.3V) to (V+ + 0.3V)

Continuous Power Dissipation

Narrow Plastic DIP (derate 8.70mW/°C above +70°C)....478mW

Wide SO (derate 11.76mW/°C above +70°C)..............647mW

Narrow CERDIP (derate 12.50mW/°C above +70°C) ..688mW

Operating Temperature Ranges

MAX132C_ _ .......................................................0°C to +70°C

MAX132E_ _ ....................................................-40°C to +85°C

MAX132MRG .................................................-55°C to +125°C

Storage Temperature Range .............................-65°C to +160°C

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

Bits

±18Resolution

UNITSMIN TYP MAXPARAMETER

(Note 1)

CONDITIONS

HI = 0V % of FSR

±0.0168

0 ±0.0076

Zero Error

CLK

= 32.768Hz

(Note 4)

ms63

±0.032

Rollover Error

(Notes 2, 3)

% of FSR

0 ±0.010

% of FSR±0.0015 ±0.006Integral Nonlinearity

IN HI = IN LO V±3.0

Input Voltage Range

Common-Mode Range

(Note 3) ppm/°C±5Scale Factor Temp. Coefficient

(Note 3) ppm/°C±0.15 ±1.5

µV15RMS Noise

Zero-Reading Drift

mV±512

Conversion Time

HI = 400mV, V- = -5.0V,

4.5V ≤ V+ ≤ 5.5V

±0.003 ±0.0168

% of FSR

±0.003 ±0.0061

Positive Supply Rejection

Digital input = 0V or V+

µA110

µA-25 -60Digital Ground Supply Current

Positive Sleep-Mode Current

Digital input = 0V or V+

µA-35 -65

µA60 125Positive Supply Current

Negative Supply Current

Digital input = 0V or V+ µA-1 -10Negative Sleep-Mode Current

V-5.5 -4.5

V4.5 5.5Positive Supply Voltage

Negative Supply Voltage

= +25°C

= T

MIN

to T

MAX

= +25°C

= T

MIN

to T

MAX

IN HI to IN LO, for specified accuracy

% of FSR

±0.25 ±0.50

Common-Mode Rejection Ratio IN HI = IN LO

±0.009 ±0.032V

= ±500mV

= ±3.0V

±12 ±250

Leakage Current IN HI, IN LO

±2 ±10T

= +25°C

= T

MIN

to T

MAX

= +25°C

= T

MIN

to T

MAX

= T

MIN

to T

MAX

= +25°C

HI = 400mV, V- = 5.0V,

-5.5V ≤ V- ≤ -4.5V

±0.003 ±0.0168

% of FSR

±0.003 ±0.0061

Negative Supply Rejection

Digital input = 0V or V+ µA0±2

Digital Ground Sleep-Mode

Current

= +25°C

% of FSR±3.1Read-Zero 50Hz/60Hz Range

ACCURACY

POWER REQUIREMENTS

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