Datasheet > AD7787_13

AD7787_13

更新时间： 2024-09-13 12:52:31

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
20页	307K
描述
Low Power, 2-Channel 24-Bit Sigma-Delta ADC

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AD7787_13 数据手册

Low Power, 2-Channel

24-Bit Sigma-Delta ADC

Data Sheet

AD7787

FEATURES

APPLICATIONS

Power

Smart transmitters

Battery applications

Portable instrumentation

Sensor measurement

Temperature measurement

Pressure measurement

Weigh scales

Supply: 2.5 V to 5.25 V operation

Normal mode: 75 µA max

Power-down mode: 1 µA max

RMS noise: 1.1 µV at 9.5 Hz update rate

19.5-bit p-p resolution (22 bits effective resolution)

Integral nonlinearity: 3.5 ppm typical

Simultaneous 50 Hz and 60 Hz rejection

Internal clock oscillator

4 to 20 mA loops

GENERAL DESCRIPTION

Rail-to-rail input buffer

VDD monitor channel

Temperature range: −40°C to +105°C

10-lead MSOP

The AD7787 is a low power, complete analog front end for low

frequency measurement applications. It contains a low noise

24-bit Σ-Δ ADC with one differential input and one single-

ended input that can be buffered or unbuffered.

INTERFACE

The device operates from an internal clock. Therefore, the user

does not have to supply a clock source to the device. The output

data rate from the part is software programmable and can be

varied from 9.5 Hz to 120 Hz, with the rms noise equal to

1.1 µV at the lower update rate. The internal clock frequency

can be divided by a factor of 2, 4, or 8, which leads to a

3-wire serial

SPI®, QSPI™, MICROWIRE™, and DSP compatible

Schmitt trigger on SCLK

reduction in the current consumption. The update rate, cutoff

frequency, and settling time scales with the clock frequency.

The part operates with a power supply from 2.5 V to 5.25 V.

When operating from a 3 V supply, the power dissipation for

the part is 225 µW maximum. It is housed in a 10-lead MSOP.

FUNCTIONAL BLOCK DIAGRAM

GND

REFIN

AD7787

DOUT/RDY

DIN

SERIAL

INTERFACE

AND

AIN1(+)

SCLK

Σ-∆

ADC

LOGIC

BUF

MUX

CONTROL

AIN1(–)

AIN2

CLOCK

GND

Figure 1.

Rev. A

Document Feedback

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 registered trademarks are the property of their respective owners.

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

Technical Support

www.analog.com

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与AD7787_13相关器件

型号	品牌	获取价格	描述	数据表
AD7787-A	COILCRAFT	获取价格	Telecom Transformer
AD7787BRM	ADI	获取价格	Low Power, 2-Channel 24-Bit Sigma-Delta ADC
AD7787BRM-REEL	ADI	获取价格	Low Power, 2-Channel 24-Bit Sigma-Delta ADC
AD7787BRMZ	ADI	获取价格	Low Power, 2-Channel 24-Bit Sigma-Delta ADC
AD7787BRMZ-RL	ADI	获取价格	Low Power, 2-Channel 24-Bit Sigma-Delta ADC
AD7788	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC
AD7788_15	ADI	获取价格	Low Power, 16-/24-Bit, Sigma-Delta ADCs
AD7788ARM	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC
AD7788ARM-REEL	ADI	获取价格	Low Power, 16-/24-Bit Sigma-Delta ADC
AD7788ARMZ	ADI	获取价格	Low Power, 16-/24-Bit, Sigma-Delta ADCs

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