Datasheet > AD7887_09

AD7887_09

更新时间： 2024-11-16 12:27:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	444K
描述
2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP

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AD7887_09 数据手册

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

125 kSPS, 12-Bit ADC in 8-Lead MSOP

AD7887

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Specified for V_DDof 2.7 V to 5.25 V

Flexible power/throughput rate management

Shutdown mode: 1 μA max

One or two single-ended inputs

Serial interface: SPI®/QSPI™/MICROWIRE™/DSP compatible

8-lead narrow SOIC and MSOP packages

AD7887

AIN0

I/P

MUX

T/H

AIN1/

REF

2.5V

REF

COMP

AIN1/V

SOFTWARE

CONTROL

LATCH

REF

BUF

APPLICATIONS

Battery-powered systems (personal digital assistants,

medical instruments, mobile communications)

Instrumentation and control systems

High speed modems

GND

CHARGE

REDISTRIBUTION

DAC

SAR + ADC

CONTROL LOGIC

SPORT

DIN

SCLK

DOUT

Figure 1.

GENERAL DESCRIPTION

The AD7887 is a high speed, low power, 12-bit analog-to-digital

converter (ADC) that operates from a single 2.7 V to 5.25 V

power supply. The AD7887 is capable of 125 kSPS throughput

rate. The 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 of up to 2.5 MHz.

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

inputs is 0 to V_DD

CMOS construction ensures low power dissipation of typically

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

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

SOIC and an 8-lead MSOP package.

PRODUCT HIGHLIGHTS

The AD7887 can be configured for either dual- or single-channel

operation via the on-chip control register. There 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) and the AIN1/V_REFpin assumes its V_REF

function. This 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.

This external reference voltage has a range of 2.5 V to V_DD. The

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

package.

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

3. Flexible power management options, including automatic

power-down after conversion.

4. Read-only ADC capability.

5. Analog input range from 0 V to V_REF

analog input range on AIN0 is 0 to V_REF

6. Versatile serial input/output port (SPI/QSPI/MICROWIRE/

DSP compatible).

In dual-channel operation, the AIN1/V_REFpin assumes its AIN1

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

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

Rev. D

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD7887_09相关器件

型号	品牌	获取价格	描述	数据表
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
AD7887ARMZ-REEL2	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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