AD7887

更新时间： 2024-11-15 22:53:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	136K
描述
+2.7 V to +5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead uSOIC

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数据手册

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AD7887 数据手册

+2.7 V to +5.25 V, Micropower, 2-Channel,

125 kSPS, 12-Bit ADC in 8-Lead ␮SOIC

AD7887

FUNCTIO NAL BLO CK D IAGRAM

FEATURES

Specified for V_DDof +2.7 V to +5.25 V

Flexible Pow er/ Throughput Rate Managem ent

Shutdow n Mode: 1 ␮A Max

One/ Tw o Single-Ended Inputs

AD7887

AIN0

I/P

MUX

T/H

Serial Interface: SPI™/ QSPI™/ MICROWIRE™/ DSP

Com patible

8-Lead Narrow SOIC and ␮SOIC Packages

REF

AIN1

2.5V

REF

COMP

/AIN1

REF

APPLICATIONS

SOFTWARE

CONTROL

LATCH

BUF

Battery-Pow ered System s (Personal Digital Assistants,

Medical Instrum ents, Mobile Com m unications)

Instrum entation and Control System s

High Speed Modem s

GND

CHARGE

REDISTRIBUTION

DAC

SAR + ADC

CONTROL LOGIC

GENERAL D ESCRIP TIO N

The AD7887 is a high speed, low power, 12-bit ADC that oper-

ates from a single +2.7 V to +5.25 V power supply. The AD7887

is capable of 125 kSPS throughput rate. T he input track-and-

hold acquires a signal in 500 ns and features a single-ended

sampling scheme. The output coding for the AD7887 is straight

binary and the part is capable of converting full power signals up to

2.5 MHz.

SPORT

DIN

SCLK

DOUT

CMOS construction ensures low power dissipation of typically

2 mW for normal operation and 3 µW in power-down mode.

T he part is available in an 8-lead, 0.15-inch-wide narrow body

SOIC and an 8-lead µSOIC package.

T he AD7887 can be configured for either dual or single chan-

nel operation, via the on-chip Control Register. T here is a

default single-channel mode that allows the AD7887 to be

operated as a read-only ADC. In single-channel operation,

there is one analog input (AIN0) with the V_REF/AIN1 pin as-

suming its V_REFfunction. T his V_REFpin allows the user access

to the part’s internal +2.5 V reference, or the V_REFpin can be

overdriven by an external reference to provide the reference

voltage for the part. T his external reference voltage has a range

P RO D UCT H IGH LIGH TS

1. Smallest 12-bit dual/single-channel ADC; 8-lead µSOIC

package.

2. Lowest power 12-bit dual/single-channel ADC.

3. Flexible power management options including automatic

power-down after conversion.

of +2.5 V to V_DD. The analog input range on AIN0 is 0 to +V_REF

In dual-channel operation, the V_REF/AIN1 pin assumes its AIN1

4. Read-Only ADC capability.

function, providing a second analog input channel. In this case,

the reference voltage for the part is provided via the V_DDpin. As

a result, the input voltage range on both the AIN0 and AIN1

5. Analog input range from 0 V to V_REF

6. Versatile serial I/O port (SPI/QSPI/MICROWIRE/DSP

compatible).

inputs is 0 to V_DD

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

REV. B

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.

Tel: 781/ 329-4700

Fax: 781/ 326-8703

World Wide Web Site: http:/ / w w w .analog.com

12 3 4 5 6 7...16

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与AD7887相关器件

型号	品牌	获取价格	描述	数据表
AD7887_09	ADI	获取价格	2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP
AD7887AR	ADI	获取价格	+2.7 V to +5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead uSOIC
AD7887ARM	ADI	获取价格	+2.7 V to +5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead uSOIC
AD7887ARM	ROCHESTER	获取价格	2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MO-187AA, MSOP-8
AD7887ARM-REEL	ADI	获取价格	2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP
AD7887ARM-REEL7	ADI	获取价格	2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP
AD7887ARM-REEL7	ROCHESTER	获取价格	2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MO-187AA, MSOP-8
AD7887ARMZ	ADI	获取价格	2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP
AD7887ARMZ2	ADI	获取价格	2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP
AD7887ARMZ-REEL	ADI	获取价格	2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP

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