AD7946

更新时间： 2024-11-29 22:49:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
27页	299K
描述
14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN

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AD7946 数据手册

14-Bit, 500 kSPS PulSAR™

ADC in MSOP/QFN

Preliminary Technical Data

AD7946

FEATURES

APPLICATION DIAGRAM

14-bit resolution with no missing codes

Throughput: 500 kSPS

0.5 TO 5V 5V

INL: 0.4 LSB typ, 1 LSB max ( 0.0061 % of FSR)

S/(N + D): 85 dB @ 20 kHz

THD: −100 dB @ 20 kHz

Pseudo-differential analog input range

0 V to V_REFwith V_REFup to VDD

VIO

SDI

1.8 TO VDD

REF VDD

0 TO VREF

IN+

IN–

SCK

SDO

CNV

AD7946

3- OR 4-WIRE INTERFACE

(SPI, DAISY CHAIN, CS)

GND

No pipeline delay

Single-supply 5V operation with

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

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

Daisy chain multiple ADCs and BUSY indicator

Power dissipation

Figure 1.

GENERAL DESCRIPTION

3.3 mW @ 5 V/100 kSPS,

3.3 µW @ 5 V/100 SPS

Stand-by current: 1 nA

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

QFN (LFCSP), 3 mm × 3 mm same space as SOT-23

Pin-for-pin compatible with the 16-Bit AD7686

The AD7946 is a 14-bit, charge redistribution successive

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

from a single 5V power supply, VDD. 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 REF with respect

to a ground sense IN−. The reference voltage, REF, is applied

externally and can be set up to the supply voltage.

APPLICATIONS

Battery-powered equipment

Data acquisition

Instrumentation

Its power scales linearly with throughput.

Medical instruments

Process control

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

supply VIO.

Table 1. MSOP, QFN (LFCSP)/SOT-23 14 and16-Bit ADC

Type

100 kSPS

250 kSPS

500 kSPS

16-Bit True

Differential

AD7684

AD7687

AD7688

16-Bit Pseudo

Differential/Unipolar

16-Bit Unipolar

14-Bit Pseudo

AD7683

AD7680

AD7685

AD7694

AD7686

AD7946

The AD7946 is housed in a 10-lead MSOP or a 10-lead QFN

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

AD7942

Differential/Unipolar

14-Bit Unipolar

AD7940

Rev Pr D

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

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.326.8703

www.analog.com

12 3 4 5 6 7...27

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与AD7946相关器件

型号	品牌	获取价格	描述	数据表
AD7946_17	ADI	获取价格	PulSAR ADC in MSOP and LFCSP
AD79461	ADI	获取价格	14-Bit, 500 kSPS PulSAR ADC in MSOP
AD7946BCPRL7	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BCPWP	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BCPZRL	ADI	获取价格	PulSAR ADC in MSOP and LFCSP
AD7946BCPZRL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, DSO10, 3 X 3 MM, ROHS COMPLIANT,
AD7946BCPZRL7	ADI	获取价格	14-Bit, 500 kSPS PulSAR® ADC in MSOP
AD7946BRM	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BRMRL7	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BRM-RL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MO-187-BA, MSOP-10

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