AD7944BCPZ-RL7

更新时间： 2024-11-30 06:36:11

品牌	Logo	应用领域
亚德诺 - ADI		转换器模数转换器 PC
页数	文件大小	规格书
28页	582K
描述
14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP

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AD7944BCPZ-RL7 数据手册

14-Bit, 2.5 MSPS, PulSAR

15.5 mW ADC in LFCSP

AD7944

APPLICATION DIAGRAM

FEATURES

1.8V

14-bit resolution with no missing codes

Throughput: 2.5 MSPS (TURBO high), 2.0 MSPS (TURBO low)

Low power dissipation

15.5 mW at 2.5 MSPS, with external reference

28 mW at 2.5 MSPS, with internal reference

INL: 0.25 LSB typical, 1.0 LSB maximum

SNR

2.5V

2.7V

VIO

TURBO

SDI

BVDD

AVDD,

DVDD

VIO

IN+

IN–

3- OR 4-WIRE

INTERFACE:

SPI, CS,

DAISY CHAIN

(TURBO = LOW)

REF

AD7944

SCK

SDO

CNV

GND REF

84 dB, with on-chip reference

84.5 dB, with external reference

10µF

4.096 V internal reference: typical drift of 10 ppm/°C

Pseudo differential analog input voltage range

0 V to V_REFwith V_REFup to 5.0 V

NOTES

1. GND REFERS TO REFGND, AGND, AND DGND.

Allows use of any input range

Figure 1.

No pipeline delay

Logic interface: 1.8 V/2.5 V/2.7 V

GENERAL DESCRIPTION

The AD7944 is a 14-bit, 2.5 MSPS successive approximation

analog-to-digital converter (SAR ADC). It contains a low power,

high speed, 14-bit sampling ADC, an internal conversion clock,

an internal reference (and buffer), error correction circuits, and

a versatile serial interface port. On the rising edge of CNV, the

AD7944 samples an analog input, IN+, between 0 V and V_REF

with respect to a ground sense, IN−. The AD7944 features a

very high sampling rate turbo mode (TURBO high) and a

reduced power normal mode (TURBO low) for low power

applications where the power is scaled with the throughput.

Serial interface: SPI-/QSPI-/MICROWIRE-/DSP-compatible

Ability to daisy-chain multiple ADCs with busy indicator

20-lead, 4 mm × 4 mm LFCSP (QFN)

APPLICATIONS

Battery-powered equipment

Communications

ATE

Data acquisition systems

Medical instruments

In normal mode (TURBO low), the SPI-compatible serial inter-

face also features the ability, using the SDI input, to daisy-chain

several ADCs on a single 3-wire bus and provide an optional busy

indicator. The serial interface is compatible with 1.8 V, 2.5 V,

and 2.7 V supplies using the separate VIO supply.

The AD7944 is available in a 20-lead LFCSP with operation

specified from −40°C to +85°C.

Table 1. MSOP, LFCSP, 14-/16-/18-Bit PulSAR® ADCs¹

Type

14-Bit

16-Bit

100 kSPS

AD7940

AD7680

AD7683

AD7684

250 kSPS

AD7942²

AD7685²

AD7687²

AD7694

AD7691²

400 kSPS to 500 kSPS

AD7946²

≥1000 kSPS

AD7944³

AD7980²

AD7983²

AD7985³

AD7982²

AD7984²

AD7986³

ADC Driver

AD7686²

ADA4941-1

ADA4841-x

AD8021

ADA4941-1

ADA4841-x

AD8021

AD7688²

AD7693²

18-Bit

AD7690²

¹See www.analog.com for the latest selection of PulSAR ADCs and ADC drivers.

²Pin-for-pin compatible with all other parts marked with this endnote.

³The AD7944, AD7985, and AD7986 are pin-for-pin compatible.

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

12 3 4 5 6 7...28

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AD7944BCPZ-RL7 替代型号

型号	品牌	替代类型	描述	数据表
AD7985BCPZ-RL7	ADI	类似代替	16-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
AD7985BCPZ	ADI	类似代替	16-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP

与AD7944BCPZ-RL7相关器件

型号	品牌	获取价格	描述	数据表
AD7945	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DACs
AD7945_15	ADI	获取价格	3.3 V/5 V Multiplying 12-Bit DACs
AD7945AN-B	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DACs
AD7945AN-B	ROCHESTER	获取价格	暂无描述
AD7945ANZ-B	ROCHESTER	获取价格	PARALLEL, WORD INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDIP20, PLASTIC, DIP-20
AD7945ANZ-B	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DAC With a Parallel Interface
AD7945ARS-B	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DACs
AD7945ARS-BREEL	ADI	获取价格	3.3 V/5 V Multiplying 12-Bit DACs
AD7945ARSZ-B	ROCHESTER	获取价格	PARALLEL, WORD INPUT LOADING, 5 us SETTLING TIME, 12-BIT DAC, PDSO20, SSOP-20
AD7945ARSZ-B	ADI	获取价格	+3.3 V/+5 V Multiplying 12-Bit DAC With a Parallel Interface

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