MAX1203ACAP-T 查看數據表（PDF） - Maxim Integrated

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MAX1203ACAP-T

5V, 8-Channel, Serial, 12-Bit ADCs with 3V Digital Interface

Maxim Integrated 

MAX1202/MAX1203

EVALUATION KIT AVAILABLE

5V, 8-Channel, Serial, 12-Bit ADCs

with 3V Digital Interface

General Description

The MAX1202/MAX1203 are 12-bit data-acquisition sys-

tems specifically designed for use in applications with

mixed +5V (analog) and +3V (digital) supply voltages.

They operate with a single +5V analog supply or dual ±5V

analog supplies, and combine an 8-channel multiplexer,

high-bandwidth track/hold, and serial interface with high

conversion speed and low power consumption.

A 4-wire serial interface connects directly to SPI/

MICROWIRE® devices without external logic, and a serial

strobe output allows direct connection to TMS320-family

digital signal processors. The MAX1202/MAX1203 use

either the internal clock or an external serial-interface clock

to perform successive approximation analog-to-digital con-

versions. The serial interface operates at up to 2MHz.

The MAX1202 features an internal 4.096V reference,

while the MAX1203 requires an external reference. Both

parts have a reference-buffer amplifier that simplifies gain

trim. They also have a VL pin that is the power supply for

the digital outputs. Output logic levels (3V, 3.3V, or 5V) are

determined by the value of the voltage applied to this pin.

These devices provide a hard-wired SHDN pin and two

software-selectable power-down modes. Accessing the

serial interface automatically powers up the devices. A

quick turn-on time enables the MAX1202/MAX1203 to

be shut down between conversions, allowing the user

to optimize supply currents. By customizing power-down

between conversions, supply current can drop below

10μA at reduced sampling rates.

The MAX1202/MAX1203 are available in 20-pin SSOP

and PDIP packages, and are specified for the commercial

and extended temperature ranges.

Applications

●● 5V/3V Mixed-Supply Systems

●● Data Acquisition

●● High-Accuracy Process Control

●● Battery-Powered Instruments

●● Medical Instruments

Typical Operating Circuit appears at end of data sheet.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

Features

●● 8-Channel Single-Ended or 4-Channel Differential

Inputs

●● Operates from Single +5V or Dual ±5V Supplies

●● User-Adjustable Output Logic Levels

(2.7V to 5.25V)

●● Low Power: 1.5mA (Operating Mode)

2μA (Power-Down Mode)

●● Internal Track/Hold, 133kHz Sampling Rate

●● Internal 4.096V Reference (MAX1202)

●● SPI/MICROWIRE/TMS320-Compatible

4-Wire Serial Interface

●● Software-Configurable Unipolar/Bipolar Inputs

●● 20-Pin PDIP/SSOP

Ordering Information

PART

MAX1202ACPP+

MAX1202BCPP+

MAX1202ACAP+

MAX1202BCAP+

TEMP RANGE

0ºC to +70ºC

0ºC to +70ºC

0ºC to +70ºC

0ºC to +70ºC

PIN-

PACKAGE

20 PDIP

20 PDIP

20 SSOP

20 SSOP

INL

(LSB)

±1/2

±1

±1/2

±1

Ordering Information continued at end of data sheet.

+Denotes a lead(Pb)-free/RoHS-compliant package.

Pin Configuration

TOP VIEW

+

CH0 1

CH1 2

CH2 3

CH3 4

CH4 5

MAX1202

MAX1203

CH5 6

CH6 7

CH7 8

VSS 9

SHDN 10

20 VDD

19 SCLK

18 CS

17 DIN

16 SSTRB

15 DOUT

14 VL

13 GND

12 REFADJ

11 REF

PDIP/SSOP

19-1173; Rev 3; 3/12

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