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AD7799BRUZ-REEL

更新时间： 2024-11-23 12:26:39

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器仪表放大器光电二极管
页数	文件大小	规格书
28页	897K
描述
3-Channel, Low Noise, Low Power, 16-/24-Bit, Î£-Î ADC with On-Chip In-Amp

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AD7799BRUZ-REEL 数据手册

3-Channel, Low Noise, Low Power,

16-/24-Bit, Σ-Δ ADC with On-Chip In-Amp

AD7798/AD7799

FEATURES

FUNCTIONAL BLOCK DIAGRAM

GND

REFIN(+) REFIN(–)

RMS noise:

27 nV at 4.17 Hz (AD7799)

65 nV at 16.7 Hz (AD7799)

40 nV at 4.17 Hz (AD7798)

85 nV at 16.7 Hz (AD7798)

Current: 380 μA typical

Power-down: 1 μA maximum

Low noise, programmable gain, instrumentation amp

Update rate: 4.17 Hz to 470 Hz

3 differential inputs

REFERENCE

DETECT

AD7798/AD7799

AIN1(+)

AIN1(–)

DOUT/RDY

DIN

AIN2(+)

SERIAL

INTERFACE

AND

CONTROL

LOGIC

MUX

AIN2(–)

Σ-Δ

ADC

IN-AMP

AIN3(+)/P1

AIN3(–)/P2

SCLK

GND

PSW

INTERNAL

CLOCK

AD7798: 16-BIT

AD7799: 24-BIT

Internal clock oscillator

GND

Simultaneous 50 Hz/60 Hz rejection

Reference detect

Figure 1.

Low-side power switch

Programmable digital outputs

Burnout currents

Power supply: 2.7 V to 5.25 V

–40°C to +105°C temperature range

Independent interface power supply

16-lead TSSOP package

GENERAL DESCRIPTION

The AD7798/AD7799 are low power, low noise, complete

analog front ends for high precision measurement applications.

The AD7798/AD7799 contains a low noise, 16-/24-bit ∑-Δ

ADC with three differential analog inputs. The on-chip, low

noise instrumentation amplifier means that signals of small

amplitude can be interfaced directly to the ADC. With a gain

setting of 64, the rms noise is 27 nV for the AD7799 and 40 nV

for the AD7798 when the update rate equals 4.17 Hz.

INTERFACE

3-wire serial

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

Schmitt trigger on SCLK

On-chip features include a low-side power switch, reference

detect, programmable digital output pins, burnout currents,

and an internal clock oscillator. The output data rate from the

part is software-programmable and can be varied from 4.17 Hz

to 470 Hz.

APPLICATIONS

Weigh scales

Pressure measurement

Strain gauge transducers

Gas analysis

Industrial process control

Instrumentation

The part operates with a power supply from 2.7 V to 5.25 V.

The AD7798 consumes a current of 300 μA typical, whereas the

AD7799 consumes 380 μA typical. Both devices are housed in a

16-lead TSSOP package.

Portable instrumentation

Blood analysis

Smart transmitters

Liquid/gas chromotography

6-digit DVM

Rev. A

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

www.analog.com

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AD7799BRUZ-REEL 替代型号

型号	品牌	替代类型	描述	数据表
AD7799BRUZ	ADI	类似代替	3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp
AD7799BRU-REEL	ADI	类似代替	3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp
AD7799BRU	ADI	类似代替	3-Channel, Low Noise, Low Power, 16-/24-Bit, ADC with On-Chip In-Amp

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