MAX1295 查看數據表（PDF） - Maxim Integrated

零件编号

产品描述 (功能)

生产厂家

MAX1295

265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface

Maxim Integrated 

19-1530; Rev 3; 12/02

EVAALVUAAILTAIOBNLEKIT 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs

with +2.5V Reference and Parallel Interface

General Description

The MAX1295/MAX1297 low-power, 12-bit analog-to-

digital converters (ADCs) feature a successive-approxi-

mation ADC, automatic power-down, fast wake-up

(2µs), an on-chip clock, +2.5V internal reference, and a

high-speed 12-bit parallel interface. They operate with

a single +2.7V to +3.6V analog supply.

Power consumption is only 5.4mW at the maximum

sampling rate of 265ksps. Two software-selectable

power-down modes enable the MAX1295/MAX1297 to

be shut down between conversions; accessing the par-

allel interface returns them to normal operation.

Powering down between conversions can reduce sup-

ply current below 10µA at lower sampling rates.

Both devices offer software-configurable analog inputs

for unipolar/bipolar and single-ended/pseudo-differen-

tial operation. In single-ended mode, the MAX1295 has

six input channels and the MAX1297 has two (three

input channels and one input channel, respectively,

when in pseudo-differential mode).

Excellent dynamic performance and low power, combined

with ease of use and small package size, make these con-

verters ideal for battery-powered and data-acquisition

applications or for other circuits with demanding power-

consumption and space requirements.

The MAX1295/MAX1297 tri-states INT when CS goes high.

Refer to MAX1265/MAX1267 if tri-stating INT is not desired.

The MAX1295 is offered in a 28-pin QSOP package, while

the MAX1297 comes in a 24-pin QSOP. For pin-compati-

ble +5V, 12-bit versions, refer to the MAX1294/MAX1296

data sheet.

Applications

Industrial Control Systems

Energy Management

Data-Acquisition Systems

Data Logging

Patient Monitoring

Touchscreens

Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX1295ACEI 0°C to +70°C

MAX1295BCEI 0°C to +70°C

MAX1295AEEI -40°C to +85°C

MAX1295BEEI -40°C to +85°C

MAX1297ACEG 0°C to +70°C

MAX1297BCEG 0°C to +70°C

MAX1297AEEG -40°C to +85°C

MAX1297BEEG -40°C to +85°C

28 QSOP

28 QSOP

28 QSOP

28 QSOP

24 QSOP

24 QSOP

24 QSOP

24 QSOP

INL

(LSB)

±0.5

±1

±0.5

±1

±0.5

±1

±0.5

±1

Features

♦ 12-Bit Resolution, ±0.5 LSB Linearity

♦ +3V Single-Supply Operation

♦ Internal +2.5V Reference

♦ Software-Configurable Analog Input Multiplexer

6-Channel Single-Ended/

3-Channel Pseudo-Differential (MAX1295)

2-Channel Single-Ended/

1-Channel Pseudo-Differential (MAX1297)

♦ Software-Configurable Unipolar/Bipolar

Analog Inputs

♦ Low Current

1.9mA (265ksps)

1.0mA (100ksps)

400µA (10ksps)

2µA (Shutdown)

♦ Internal 3MHz Full-Power Bandwidth Track/Hold

♦ Parallel 12-Bit Interface

♦ Small Footprint

28-Pin QSOP (MAX1295)

24-Pin QSOP (MAX1297)

Pin Configurations

TOP VIEW

D9 1

D8 2

D7 3

D6 4

D5 5

D4 6

D3 7

D2 8

D1 9

D0 10

INT 11

RD 12

WR 13

CLK 14

MAX1295

28 D10

27 D11

26 VDD

25 REF

24 REFADJ

23 GND

22 COM

21 CH0

20 CH1

19 CH2

18 CH3

17 CH4

16 CH5

15 CS

QSOP

Pin Configurations continued at end of data sheet.

Typical Operating Circuits appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Share Link: