Datasheet > MAX1247

MAX1247

更新时间： 2024-09-17 14:58:03

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描述
+2.7V、低功耗、4通道、串行12位ADC，QSOP-16封装

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数据手册

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MAX1247 数据手册

19-1071; Rev 2; 10/01

+2.7V, Low-Power, 4-Channel,

Serial 12-Bit ADCs in QSOP-16

General Description

Features

The MAX1246/MAX1247 12-bit data-acquisition systems

combine a 4-channel multiplexer, high-bandwidth

track/hold, and serial interface with high conversion

speed and low power consumption. The MAX1246 oper-

ates from a single +2.7V to +3.6V supply; the MAX1247

operates from a single +2.7V to +5.25V supply. Both

devices’ analog inputs are software configurable for

unipolar/bipolar and single-ended/differential operation.

ꢀ 4-Channel Single-Ended or 2-Channel

Differential Inputs

ꢀ Single-Supply Operation:

+2.7V to +3.6V (MAX1246)

+2.7V to +5.25V (MAX1247)

ꢀ Internal 2.5V Reference (MAX1246)

ꢀ Low Power: 1.2mA (133ksps, 3V supply)

54µA (1ksps, 3V supply)

The 4-wire serial interface connects directly to SPI™/

QSPI™ and MICROWIRE™ devices without external

logic. A serial strobe output allows direct connection to

TMS320-family digital signal processors. The MAX1246/

MAX1247 use either the internal clock or an external seri-

al-interface clock to perform successive-approximation

analog-to-digital conversions.

1µA (power-down mode)

ꢀ SPI/QSPI/MICROWIRE/TMS320-Compatible

4-Wire Serial Interface

ꢀ Software-Configurable Unipolar or Bipolar Inputs

ꢀ 16-Pin QSOP Package (same area as 8-pin SO)

The MAX1246 has an internal 2.5V reference, while the

MAX1247 requires an external reference. Both parts have

a reference-buffer amplifier with a 1.5ꢀ voltage-

adjustment range. These devices provide a hard-wired

SHDN pin and a software-selectable power-down, and

can be programmed to automatically shut down at the

end of a conversion. Accessing the serial interface auto-

matically powers up the MAX1246/MAX1247, and the

quick turn-on time allows them to be shut down between

all conversions. This technique can cut supply current to

under 60µA at reduced sampling rates. The MAX1246/

MAX1247 are available in a 16-pin DIP and a small QSOP

that occupies the same board area as an 8-pin SO.

Ordering Information

INL

(LSB)

PART

TEMP RANGE PIN-PACKAGE

MAX1246ACPE 0°C to +70°C

16 Plastic DIP

16 QSOP

1/2

MAX1246BCPE

MAX1246ACEE

MAX1246BCEE

0°C to +70°C

1/2

16 QSOP

Ordering Information continued at end of data sheet.

For 8-channel versions of these devices, see the

MAX146/MAX147 data sheet.

________________________Applications

__________Typical Operating Circuit

Portable Data Logging

Medical Instruments

Pen Digitizers

+3V

CH0

0.1µF

Data Acquisition

0V TO

+2.5V

DGND

Battery-Powered Instruments

Process Control

ANALOG

INPUTS

MAX1246

CH3

AGND

COM

CPU

I/O

VREF

4.7µF

SCLK

SCK (SK)

MOSI (SO)

MISO (SI)

DIN

Pin Configuration appears at end of data sheet.

DOUT

REFADJ

0.047µF

SSTRB

SHDN

SPI and QSPI are registered trademarks of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

________________________________________________________________ Maxim Integrated Products

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.

12 3 4 5 6 7...25

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与MAX1247相关器件

型号	品牌	获取价格	描述	数据表
MAX1247ACEE	MAXIM	获取价格	+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
MAX1247ACPE	MAXIM	获取价格	+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
MAX1247ACPE+	MAXIM	获取价格	暂无描述
MAX1247AEEE	MAXIM	获取价格	+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
MAX1247AEEE+	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 4 Channel, Serial Access, CMOS, PDSO16, 0.1
MAX1247AEEE+T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 4 Channel, Serial Access, CMOS, PDSO16, 0.1
MAX1247AEEE-T	MAXIM	获取价格	ADC, Successive Approximation, 12-Bit, 1 Func, 4 Channel, Serial Access, CMOS, PDSO16, 0.1
MAX1247AEPE	MAXIM	获取价格	+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
MAX1247AMJE	MAXIM	获取价格	+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16
MAX1247BCEE	MAXIM	获取价格	+2.7V, Low-Power, 4-Channel, Serial 12-Bit ADCs in QSOP-16

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