Datasheet > AD7691BRMZ

AD7691BRMZ

更新时间： 2024-09-13 04:30:47

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
28页	823K
描述
18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/QFN

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替代型号

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AD7691BRMZ 数据手册

18-Bit, 1.5 LSB INL, 250 kSPS PulSAR^®

Differential ADC in MSOP/QFN

AD7691

APPLICATION DIAGRAM

FEATURES

+2.3V TO VDD

+2.3V TO +5V

18-bit resolution with no missing codes

Throughput: 250 kSPS

INL: 0.75 LSB typ, 1.5 LSB max ( 6 ppm of FSR)

Dynamic range: 102 dB typ @ 250 kSPS

Oversampled dynamic range: 125 dB @1 kSPS

Noise-free code resolution: 20 bits @ 1 kSPS

Effective resolution: 22.7 bits @ 1 kSPS

SINAD: 101.5 dB typ @ 1 kHz

VIO

SDI

+1.8V TO VDD

REF VDD

IN+

IN–

3- OR 4-WIRE

SCK

SDO

CNV

INTERFACE

±10V, ±5V, ...

(SPI, DAISY CHAIN, CS)

GND

ADA4941

AD7691

THD: −125 dB typ @ 1 kHz

Figure 2.

True differential analog input range: V_REF

0 V to V_REFwith V_REFup to VDD on both inputs

No pipeline delay

Table 1. MSOP, QFN¹(LFCSP)/SOT-23

14-/16-/18-Bit PulSAR ADC

400 kSPS

500 kSPS Driver

Single-supply 2.3 V to 5 V operation with

1.8 V/2.5 V/3 V/5 V logic interface

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

Daisy-chain multiple ADCs and busy indicator

Power dissipation

5 mW @ 5 V/250 kSPS

50 μW @ 5 V/1 kSPS

Standby current: 1 nA

10-lead package: MSOP (MSOP-8 size) and

3 mm × 3 mm QFN¹(LFCSP) (SOT-23 size)

100

kSPS

250

kSPS

ADC

Type

18-Bit

AD7691

AD7690

ADA4941-1

ADA4841-x

16-Bit True

Differential

AD7684 AD7687

AD7688

AD7693

ADA4941-1

ADA4841-x

16-Bit Pseudo AD7683 AD7685

AD7686

ADA4841-x

Differential/

Unipolar

14-Bit

AD7680 AD7694

AD7940 AD7942

AD7946

ADA4841-x

Pin-for-pin compatible with the18-bit AD7690 and 16-bit

AD7693, AD7688, and AD7687

¹QFN package in development. Contact sales for samples and availability.

GENERAL DESCRIPTION

APPLICATIONS

The AD7691 is an 18-bit, charge redistribution, successive

approximation, analog-to-digital converter (ADC) that operates

from a single power supply, VDD, between 2.3 V and 5 V. It

contains a low power, high speed, 18-bit sampling ADC with no

missing codes, an internal conversion clock, and a versatile

serial interface port. On the CNV rising edge, it samples the

voltage difference between the IN+ and IN− pins. The voltages

on these pins usually swing in opposite phase between 0 V and

REF. The reference voltage, REF, is applied externally and can

be set up to the supply voltage.

Battery-powered equipment

Data acquisitions

Seismic data acquisition systems

DVMs

Instrumentation

Medical instruments

1.5

POSITIVE INL = 0.43LSB

NEGATIVE INL = –0.62LSB

1.0

0.5

Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability,

using the SDI input, to daisy-chain several ADCs on a single

3-wire bus and provides an optional busy indicator. It is compatible

with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIO supply.

–0.5

–1.0

–1.5

The AD7691 is housed in a 10-lead MSOP or a 10-lead QFN¹

(LFCSP) with operation specified from −40°C to +85°C.

65536

131072

CODE

196608

262144

Figure 1. Integral Nonlinearity vs. Code, 5 V

¹QFN package in development. Contact sales for samples and availability.

Rev. 0

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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AD7691BRMZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7691BRMZ-RL7	ADI	完全替代	18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/QFN
AD7942BRMZ	ADI	类似代替	Pseudo Differential ADC in MSOP/LFCSP
AD7685BRMZ	ADI	类似代替	16-Bit, 250 kSPS PulSAR ADC in MSOP/QFN

与AD7691BRMZ相关器件

型号	品牌	获取价格	描述	数据表
AD7691BRMZ-RL7	ADI	获取价格	18-Bit, 1.5 LSB INL, 250 kSPS PulSAR Differential ADC in MSOP/QFN
AD7693	ADI	获取价格	16-Bit, +/-0.65 LSB INL, 500 kSPS PulSAR Differential ADC in MSOP/QFN
AD76931	ADI	获取价格	14-Bit, 500 kSPS PulSAR ADC in MSOP
AD7693BCPZ	ADI	获取价格	暂无描述
AD7693BCPZRL	ADI	获取价格	1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC10, 3 X 3 MM, LEAD FREE, QFN-1
AD7693BCPZRL7	ROCHESTER	获取价格	1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, QCC10, 3 X 3 MM, LEAD FREE, QFN-1
AD7693BCPZRL7	ADI	获取价格	16-Bit, ±0.5 LSB, 500 kSPS PulSAR® Di
AD7693BRMZ	ADI	获取价格	16-Bit, Â±0.5 LSB, 500 kSPS PulSARÂ® Differen
AD7693BRMZ	ROCHESTER	获取价格	1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, DSO10, LEAD FREE, MO-187BA, MSOP-
AD7693BRMZRL7	ADI	获取价格	16-Bit, ±0.5 LSB, 500 kSPS PulSAR® Di

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