Datasheet > AD7946BRM-RL7

AD7946BRM-RL7

更新时间： 2024-11-30 14:51:03

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器
页数	文件大小	规格书
24页	437K
描述
1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MO-187-BA, MSOP-10

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AD7946BRM-RL7 数据手册

14-Bit, 500 kSPS PulSAR®

ADC in MSOP

AD7946

APPLICATION DIAGRAM

FEATURES

0.5V TO 5V

14-bit resolution with no missing codes

Throughput: 500 kSPS

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 VREF with VREF up to VDD

No pipeline delay

VIO

SDI

1.8V TO VDD

REF VDD

0 TO VREF

IN+

IN–

SCK

SDO

CNV

AD7946

3- OR 4-WIRE INTERFACE

(SPI, DAISY CHAIN, CS)

GND

Single-supply 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

Figure 1.

GENERAL DESCRIPTION

The AD7946 is a 14-bit, charge redistribution, successive

approximation, analog-to-digital converter (ADC),which

operates from a single 5 V 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.

3.3 mW @ 5 V/100 kSPS

3.3 μW @ 5 V/100 SPS

Standby current: 1 nA

10-lead MSOP (MSOP-8 size) and

3 mm × 3 mm QFN¹(LFCSP) (SOT-23 size)

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

APPLICATIONS

Battery-powered equipment

Data acquisitions

Instrumentation

Its power scales linearly with throughput.

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 or it 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, QFN¹(LFCSP)/SOT-23 14- and16-Bit ADC

100

kSPS

250

kSPS

500

kSPS

ADC

Driver

Type

16-Bit True

Differential

AD7684 AD7687²AD7688²

The AD7946 is housed in a 10-lead MSOP or a 10-lead QFN¹

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

16-Bit Pseudo

AD7683 AD7685²AD7686²ADA4841

AD7694

Differential/Unipolar

16-Bit Unipolar

14-Bit Pseudo

¹The QFN package is in development. Contact sales for samples and

AD7680

ADA4841

availability.

²Pin-for-pin compatible.

AD7942²AD7946²ADA4841

Differential/Unipolar

14-Bit Unipolar

AD7940

ADA4841

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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AD7946BRM-RL7 替代型号

型号	品牌	替代类型	描述	数据表
AD7946BRMZRL7	ADI	完全替代	PulSAR ADC in MSOP and LFCSP
AD7942BCPZRL7	ADI	完全替代	14-Bit, 250 kSPS PulSAR®, Pseudo Differential ADC in MSOP/LFCSP
AD7946BRMZ	ADI	完全替代	14-Bit, 500 kSPS PulSAR ADC in MSOP

与AD7946BRM-RL7相关器件

型号	品牌	获取价格	描述	数据表
AD7946BRMZ	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, ROHS COMPLIANT, MO-187-BA
AD7946BRMZ	ADI	获取价格	14-Bit, 500 kSPS PulSAR ADC in MSOP
AD7946BRMZRL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, ROHS COMPLIANT, MO-187-BA
AD7946BRMZRL7	ADI	获取价格	PulSAR ADC in MSOP and LFCSP
AD7947	ADI	获取价格	3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7947BRM	ADI	获取价格	IC 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MICRO, SOIC-10, Analog
AD7947BRMRL7	ADI	获取价格	IC 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MICRO, SOIC-10, Analog
AD7948	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DACs
AD7948_15	ADI	获取价格	3.3 V/5 V Multiplying 12-Bit DACs
AD7948AN-B	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DACs

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