Datasheet > AD7939BSU-REEL7

AD7939BSU-REEL7

更新时间： 2024-11-29 14:47:55

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
32页	588K
描述
IC 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP32, PLASTIC, MS-026-ABA, TQFP-32, Analog to Digital Converter

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AD7939BSU-REEL7 数据手册

8-Channel, 1.5 MSPS, 12-Bit and 10-Bit

Parallel ADCs with a Sequencer

AD7938/AD7939

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Fast throughput rate: 1.5 MSPS

Specified for V_DDof 2.7 V to 5.25 V

Low power

6 mW max at 1.5 MSPS with 3 V supplies

13.5 mW max at 1.5 MSPS with 5 V supplies

8 analog input channels with a sequencer

Software configurable analog inputs

8-channel single-ended inputs

AGND

AD7938/AD7939

REFIN/

REFOUT

2.5V

VREF

CLKIN

12-/10-BIT

SAR ADC

AND

I/P

MUX

CONVST

T/H

CONTROL

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.

These parts use advanced design techniques to achieve very

low power dissipation at high throughput rates. They also

feature flexible power management options. An on-chip control

including analog input range and configuration, output coding,

power management, and channel sequencing.

GENERAL DESCRIPTION

The AD7938/AD7939 are 12-bit and 10-bit, high speed, low

power, successive approximation (SAR) ADCs. The parts

operate from a single 2.7 V to 5.25 V power supply and feature

throughput rates up to 1.5 MSPS. The parts contain 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/AD7939 feature eight analog input channels with

a channel sequencer that allow a preprogrammed selection of

channels to be converted sequentially. These parts 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

falling edge of

and the conversion is also initiated at

6. No pipeline delay.

CONVST

7. Accurate control of the sampling instant via a

input and once off conversion control.

CONVST

this point.

The AD7938/AD7939 have 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AD7939BSU-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD7939BSUZ	ADI	获取价格	8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
AD7939BSUZ	ROCHESTER	获取价格	8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP32, LEAD FREE, PLASTIC, MS-
AD7939BSUZ-REEL7	ADI	获取价格	8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer
AD7940	ADI	获取价格	3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7940BRJ	ADI	获取价格	3 mW, 100 kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7940BRJ-R2	ADI	获取价格	3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7940BRJ-REEL7	ADI	获取价格	3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7940BRJZ-REEL7	ADI	获取价格	3 mW, 100 kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7940BRM	ADI	获取价格	3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23
AD7940BRM	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MO-187AA, MSOP-8

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