Datasheet > EVAL-AD7938-6CB

EVAL-AD7938-6CB

更新时间： 2024-11-24 03:13:19

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	762K
描述
8-Channel, 625 kSPS, 12-Bit Parallel ADCs with a Sequencer

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EVAL-AD7938-6CB 数据手册

8-Channel, 625 kSPS, 12-Bit

Parallel ADCs with a Sequencer

AD7938-6

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast throughput rate: 625 kSPS

Specified for V_DDof 2.7 V to 5.25 V

Low power

3.6 mW max at 625 kSPS with 3 V supplies

7.5 mW max at 625 kSPS with 5 V supplies

8 analog input channels with a sequencer

Software configurable analog inputs

8-channel single-ended inputs

AGND

AD7938-6

REFIN/

REFOUT

2.5V

VREF

CLKIN

12-BIT

SAR ADC

AND

CONTROL

I/P

MUX

CONVST

T/H

BUSY

4-channel fully differential inputs

4-channel pseudo-differential inputs

7-channel pseudo-differential inputs

Accurate on-chip 2.5 V reference

0.2ꢀ max @ 25°C, 25 ppm/°C max

70 dB SINAD at 50 kHz input frequency

No pipeline delays

SEQUENCER

PARALLEL INTERFACE/CONTROL REGISTER

DRIVE

DB0 DB11

CS RD WR W/B

DGND

High speed parallel interface—word/byte modes

Full shutdown mode: 2 µA max

32-lead LFCSP and TQFP package

Figure 1.

The AD7938-6 uses advanced design techniques to achieve very

low power dissipation at high throughput rates. The part also

features flexible power management options. An on-chip

control register allows the user to set up different operating

conditions, including analog input range and configuration,

output coding, power management, and channel sequencing.

GENERAL DESCRIPTION

The AD7938-6 is a 12-bit high speed, low power, successive

approximation (SAR) ADC. The part operates from a single

2.7 V to 5.25 V power supply and features throughput rates up

to 625 kSPS. The part contains a low noise, wide bandwidth,

differential track-and-hold amplifier that can handle input

frequencies up to 50 MHz.

PRODUCT HIGHLIGHTS

1. High throughput with low power consumption.

2. Eight analog inputs with a channel sequencer.

3. Accurate on-chip 2.5 V reference.

4. Software configurable analog inputs. Single-ended, pseudo-

differential, or fully differential analog inputs that are

software selectable.

The AD7938-6 features eight analog input channels with a

channel sequencer that allows a preprogrammed selection of

channels to be converted sequentially. The part can operate

with either single-ended, fully differential, or pseudo-

differential analog inputs.

The conversion process and data acquisition are controlled

using standard control inputs that allow easy interfacing with

microprocessors and DSPs. The input signal is sampled on the

5. Single-supply operation with V_DRIVEfunction. The V_DRIVE

function allows the parallel interface to connect directly to

3 V, or 5 V processor systems independent of V_DD

6. No pipeline delay.

falling edge of

and the conversion is also initiated at

CONVST

7. Accurate control of the sampling instant via a

CONVST

this point.

input and once off conversion control.

The AD7938-6 has an accurate on-chip 2.5 V reference that

can be used as the reference source for the analog-to-digital

conversion. Alternatively, this pin can be overdriven to provide

an external reference.

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

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

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与EVAL-AD7938-6CB相关器件

型号	品牌	获取价格	描述	数据表
EVAL-AD7938CBZ	ADI	获取价格	8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
EVAL-AD7940CB	ADI	获取价格	3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23
EVAL-AD7940CBZ	ADI	获取价格	3 mW, 100 kSPS, 14-Bit ADC in 6-Lead SOT-23
EVAL-AD7942-PMDZ	ADI	获取价格	EVAL BOARD 14BIT 250K ADC AD7942
EVAL-AD7942SDZ	ADI	获取价格	BOARD EVAL FOR AD7942
EVAL-AD7944EBZ	ADI	获取价格	14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
EVAL-AD7944FMCZ	ADI	获取价格	15.5 mW ADC in LFCSP
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

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