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AD7780BRUZ-REEL

更新时间： 2024-02-29 07:56:36

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器光电二极管 PC
页数	文件大小	规格书
16页	344K
描述
24-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

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AD7780BRUZ-REEL 数据手册

24-Bit, Pin-Programmable,

Ultralow Power Sigma-Delta ADC

AD7780

FUNCTIONAL BLOCK DIAGRAM

FEATURES

GND AV

GAIN

REFIN(+) REFIN(–)

Pin-programmable filter response

Update rate: 10 Hz or 16.7 Hz

Pin-programmable in-amp gain

Pin-programmable power-down and reset

Status function

Internal clock oscillator

Internal bridge power-down switch

Current

AIN(+)

DOUT/RDY

SCLK

G = 1

OR 128

24-BIT Σ-Δ

ADC

AIN(–)

BPDSW

INTERNAL

CLOCK

FILTER

PDRST

AD7780

Figure 1.

115 μA typical (gain = 1)

330 μA typical (gain = 128)

Simultaneous 50 Hz/60 Hz rejection

Power supply: 2.7 V to 5.25 V

−40°C to +105°C temperature range

Independent interface power supply

Packages

Table 1.

Parameter

Gain = 128

10 Hz 16.7 Hz

Gain = 1

Output Data Rate

RMS Noise

P-P Resolution

Settling Time

10 Hz

16.7 Hz

2.7 μV

18.7

44 nV

17.6

65 nV

17.1

2.4 μV

18.8

300 ms

120 ms

300 ms

120 ms

14-lead, narrow body SOIC

16-lead TSSOP

2-wire serial interface (read-only device)

SPI compatible

Schmitt trigger on SCLK

APPLICATIONS

Weigh scales

Pressure measurement

Industrial process control

Portable instrumentation

GENERAL DESCRIPTION

The on-chip PGA has a gain of 1 or 128, supporting a full-scale

differential input of ±± ꢀ or ±3ꢁ mꢀ. The device has two filter

response options. The filter response at the 16.7 Hz update rate

provides superior dynamic performance. The settling time is

120 ms at this update rate. At the 10 Hz update rate, the filter

response provides greater than −4± dB of stop-band attenuation.

In load cell applications, this stop-band rejection is useful to reject

low frequency mechanical vibrations of the load cell. The settling

time is 300 ms at this update rate. Simultaneous ±0 Hz/60 Hz

rejection occurs at both the 10 Hz and 16.7 Hz update rates.

The AD7780 is a complete low power front-end solution for

bridge sensor products, including weigh scales, strain gages, and

pressure sensors. It contains a precision, low power, 24-bit sigma-

delta (Σ-Δ) ADC; an on-chip, low noise programmable gain

amplifier (PGA); and an on-chip oscillator.

Consuming only 330 μA, the AD7780 is particularly suitable for

portable or battery-operated products where very low power is

required. The AD7780 also has a power-down mode that allows

the user to switch off the power to the bridge sensor and power

down the AD7780 when not converting, thus increasing the

battery life of the product.

The AD7780 operates with a power supply from 2.7 ꢀ to ±.2± ꢀ.

It is available in a narrow body, 14-lead SOIC package and a 16-lead

TSSOP package.

For ease of use, all the features of the AD7780 are controlled by

dedicated pins. Each time a data read occurs, eight status bits

are appended to the 24-bit conversion. These status bits contain

a pattern sequence that can be used to confirm the validity of

the serial transfer.

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

Fax: 781.461.3113

www.analog.com

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AD7780BRUZ-REEL 替代型号

型号	品牌	替代类型	描述	数据表
AD7780BRZ-REEL	ADI	类似代替	24-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC
AD7780BRZ	ADI	类似代替	24-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC

与AD7780BRUZ-REEL相关器件

型号	品牌	获取价格	描述	数据表
AD7780BRZ	ADI	获取价格	24-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC
AD7780BRZ-REEL	ADI	获取价格	24-Bit, Pin-Programmable, Ultralow Power Sigma-Delta ADC
AD7781	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781BRUZ	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781BRUZ-REEL	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781BRZ	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781BRZ-REEL	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781CRUZ	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781CRUZ-REEL	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC
AD7781CRZ	ADI	获取价格	20-Bit, Pin-Programmable, Low Power Sigma-Delta ADC

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