AD7705BR-REEL7

更新时间： 2024-11-26 12:52:31

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器光电二极管
页数	文件大小	规格书
44页	401K
描述
3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs

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AD7705BR-REEL7 数据手册

3 V/5 V, 1 mW, 2-/3-Channel,

16-Bit, Sigma-Delta ADCs

AD7705/AD7706

FEATURES

FUNCTIONAL BLOCK DIAGRAM

AD7705: 2 fully differential input channel ADCs

AD7706: 3 pseudo differential input channel ADCs

16 bits no missing codes

REF IN(–)

REF IN(+)

AD7705/AD7706

CHARGE

BALANCING

A/D CONVERTER

0.003% nonlinearity

Programmable gain front end: gains from 1 to 128

3-wire serial interface

ANALOG

INPUT

CHANNELS

Σ -Δ

MODULATOR

PGA

BUFFER

MAX

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

Schmitt-trigger input on SCLK

A = 1 ≈ 128

DIGITAL FILTER

Ability to buffer the analog input

2.7 V to 3.3 V or 4.75 V to 5.25 V operation

Power dissipation 1 mW maximum @ 3 V

Standby current 8 μA maximum

SERIAL INTERFACE

16-lead PDIP, 16-lead SOIC, and 16-lead TSSOP packages

MCLK IN

SCLK

CLOCK

GENERATION

MCLK OUT

GENERAL DESCRIPTION

DIN

DOUT

The AD7705/AD7706 are complete analog front ends for low

frequency measurement applications. These 2-/3-channel devices

can accept low level input signals directly from a transducer and

produce serial digital output. The devices employ a Σ-Δ

conversion technique to realize up to 16 bits of no missing codes

performance. The selected input signal is applied to a

proprietary, programmable-gain front end based around an

analog modulator. The modulator output is processed by an on-

chip digital filter. The first notch of this digital filter can be pro-

grammed via an on-chip control register, allowing adjustment of

the filter cutoff and output update rate.

GND

DRDY RESET

Figure 1.

The AD7705/AD7706 devices, with a 3 V supply and a 1.225 V

reference, can handle unipolar input signal ranges of 0 mV to

10 mV through 0 V to 1.225 V. The devices can accept bipolar

input ranges of 10 mV through 1.225 V. Therefore, the

AD7705/AD7706 devices perform all signal conditioning and

conversion for a 2-channel or 3-channel system.

The AD7705/AD7706 devices operate from a single 2.7 V to

3.3 V or 4.75 V to 5.25 V supply. The AD7705 features two fully

differential analog input channels; the AD7706 features three

pseudo differential input channels.

The AD7705/AD7706 are ideal for use in smart, microcontroller,

or DSP-based systems. The devices feature a serial interface that

can be configured for 3-wire operation. Gain settings, signal

polarity, and update rate selection can be configured in software

using the input serial port. The parts contains self-calibration and

system calibration options to eliminate gain and offset errors on

the part itself or in the system. CMOS construction ensures very

low power dissipation, and the power-down mode reduces the

standby power consumption to 20 μW typ.

Both devices feature a differential reference input. Input signal

ranges of 0 mV to 20 mV through 0 V to 2.5 V can be

incorporated on both devices when operating with a V_DDof 5 V

and a reference of 2.5 V. They can also handle bipolar input

signal ranges of 20 mV through 2.5 V, which are referenced to

the AIN(−) inputs on the AD7705 and to the COMMON input

on the AD7706.

These parts are available in a 16-lead, wide body (0.3 inch),

plastic dual in-line package (DIP); a 16-lead, wide body

(0.3 inch), standard small outline (SOIC) package; and a low

profile, 16-lead, thin shrink small outline package (TSSOP).

Rev. C

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AD7705BR-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD7705BRU	ADI	获取价格	3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs
AD7705BRU	ROCHESTER	获取价格	2-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, MO-153AB, TSSOP-16
AD7705BRU-REEL	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BRU-REEL7	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BRUZ	ADI	获取价格	3V/5V, 1 mW, 2-Channel Differential, 16-Bit Sigma-Delta ADC
AD7705BRUZ	ROCHESTER	获取价格	2-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, LEAD FREE, MO-153AB, TSSOP-16
AD7705BRUZ1	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BRUZ-REEL1	ADI	获取价格	3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
AD7705BRUZ-REEL7	ADI	获取价格	3V/5V, 1 mW, 2-Channel Differential, 16-Bit Sigma-Delta ADC
AD7705BRUZ-REEL7	ROCHESTER	获取价格	2-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO16, LEAD FREE, MO-153AB, TSSOP-16

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