Datasheet > EVAL-AD7944FMCZ

EVAL-AD7944FMCZ

更新时间： 2024-11-28 01:23:15

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
29页	689K
描述
15.5 mW ADC in LFCSP

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EVAL-AD7944FMCZ 数据手册

14-Bit, 2.5 MSPS, PulSAR,

15.5 mW ADC in LFCSP

Data Sheet

AD7944

FEATURES

APPLICATION DIAGRAM

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

Proprietary serial interface

SPI/QSPI/MICROWIRE/DSP compatible

Ability to daisy-chain multiple ADCs with busy indicator

20-lead, 4 mm × 4 mm LFCSP (QFN)

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.

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.

GENERAL DESCRIPTION

The AD7944¹is 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,

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

specified from −40°C to +85°C.

¹Protected by U.S. Patent 6,703,961.

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

ADA4841-1

AD8021

ADA4941-1

ADA4841-1

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. C

Document Feedback

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.

Technical Support

www.analog.com

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与EVAL-AD7944FMCZ相关器件

型号	品牌	获取价格	描述	数据表
EVAL-AD7946-PMDZ	ADI	获取价格	EVAL BOARD 14BIT 500K ADC AD7946
EVAL-AD7949CBZ	ADI	获取价格	14-Bit, 8-Channel, 250 kSPS PulSAR ADC
EVAL-AD7949EDZ	ADI	获取价格	14-Bit, 8-Channel, 250 kSPS PulSAR ADC
EVAL-AD7951EDZ	ADI	获取价格	14-Bit, 1 MSPS, Unipolar/Bipolar Programmable Input PulSAR ADC
EVAL-AD7960FMCZ	ADI	获取价格	18-Bit, 5 MSPS PulSAR Differential ADC
EVAL-AD7980-PMDZ	ADI	获取价格	EVAL BOARD 16BIT 1M ADC AD7980
EVAL-AD7980SDZ	ADI	获取价格	16-Bit, 1 MSPS PulSAR ADC in MSOP/QFN
EVAL-AD7982-PMDZ	ADI	获取价格	EVAL BOARD ADC 18BIT 1MSPS PULSR
EVAL-AD7982SDZ	ADI	获取价格	18-Bit, 1 MSPS PulSAR 7.0 mW ADC in MSOP/QFN
EVAL-AD7983CBZ	ADI	获取价格	16-Bit, 1.33 MSPS PulSAR ADC in MSOP/QFN

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