Datasheet > AD7942BCPZRL71

AD7942BCPZRL71

更新时间： 2024-02-11 23:56:38

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	555K
描述
14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN

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AD7942BCPZRL71 数据手册

14-Bit, 250 kSPS PulSAR,

Pseudo Differential ADC in MSOP/QFN

AD7942

APPLICATION DIAGRAM

FEATURES

0.5V TO 5V

2.5V TO 5V

14-bit resolution with no missing codes

Throughput: 250 kSPS

INL: 0.4 LSB typical, 1 LSB maximum ( 0.0061% of FSR)

SINAD: 85 dB @ 20 kHz

THD: −100 dB @ 20 kHz

Pseudo differential analog input range

0 V to V_REFwith V_REFup to VDD

VIO

1.8V TO VDD

REF VDD

0V TO V

REF

SDI

SCK

SDO

CNV

IN+

AD7942

3- OR 4-WIRE INTERFACE

(SPI, DAISY CHAIN, CS)

IN–

GND

No pipeline delay

Single-supply 2.3 V to 5.5 V operation with

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

Serial interface SPI-/QSPI-/MICROWIRE-/

DSP-compatible

Figure 1.

GENERAL DESCRIPTION

Daisy-chaining for multiple ADCs and busy indicator

Power dissipation

1.25 mW @ 2.5 V/100 kSPS, 3.6 mW @ 5 V/100 kSPS

1.25 μW @ 2.5 V/100 SPS

Standby current: 1 nA

10-lead package: MSOP and 3 mm × 3 mm QFN (LFCSP)

Pin-for-pin compatible with the 16-bit AD7685

The AD7942 is a 14-bit, charge redistribution, successive approxi-

mation PulSAR® ADC that operates from a single power supply,

VDD, between 2.3 V to 5.5 V. It contains a low power, high

speed, 14-bit sampling ADC with no missing codes, an internal

conversion clock, and a versatile serial interface port. The part

also contains a low noise, wide bandwidth, short aperture delay

track-and-hold circuit. On the CNV rising edge, it samples an

analog input, IN+, between 0 V to V_REFwith respect to a ground

sense, IN−. The reference voltage, V_REF, is applied externally and

is set up to be the supply voltage. Its power scales linearly with

the throughput.

APPLICATIONS

Battery-powered equipment

Data acquisition

Instrumentation

Medical instruments

Process controls

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 com-

patible with 1.8 V, 2.5 V, 3 V, or 5 V logic using a separate

supply (VIO).

The AD7942 is housed in a 10-lead MSOP or a 10-lead QFN

(LFCSP) package yet fits in the same size footprint as the 8-lead

MSOP or SOT-23. Operation for the AD7942 is specified from

−40°C to +85°C.

Table 1. MSOP, QFN (LFCSP)/SOT-23, 14-/16-/18-Bit ADCs

Type

14-Bit

16-Bit

100 kSPS

AD7940

AD7680

AD7683

AD7684

250 kSPS

AD7942¹

AD7685¹

AD7687¹

AD7694

AD7691¹

400 kSPS to 500 kSPS

AD7946¹

≥1000 kSPS

ADC Driver

AD7686¹

AD7980¹

AD7983¹

ADA4941-x

ADA4841-x

AD7688¹

AD7693¹

18-Bit

AD7690¹

AD7982¹

AD7984¹

ADA4941-x

ADA4841-x

¹Pin-for-pin compatible to the AD7942.

Rev. B

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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与AD7942BCPZRL71相关器件

型号	品牌	获取价格	描述	数据表
AD7942BRM	ADI	获取价格	14-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
AD7942BRMRL7	ADI	获取价格	14-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
AD7942BRMRL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MO-187BA, MSOP-10
AD7942BRM-RL7	ADI	获取价格	14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN
AD7942BRMZ	ADI	获取价格	Pseudo Differential ADC in MSOP/LFCSP
AD7942BRMZ1	ADI	获取价格	14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN
AD7942BRMZ-RL7	ADI	获取价格	14-Bit, 250 kSPS PulSAR®, Pseudo Differential ADC in MSOP/LFCSP
AD7942BRMZ-RL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, LEAD FREE, MO-187BA, MSOP
AD7942BRMZ-RL71	ADI	获取价格	14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN
AD7943	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DACs

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