Datasheet > EVAL-AD7934CB

EVAL-AD7934CB

更新时间： 2024-11-26 21:53:23

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
32页	1158K
描述
4-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer

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EVAL-AD7934CB 数据手册

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

Parallel ADCs with a Sequencer

Preliminary Technical Data

AD7933/AD7934

FUNCTIONAL BLOCK DIAGRAM

FEATURES

AGND

Fast throughput rate: 1.5 MSPS

Specified for V_DDof 2.7 V to 5.25 V

Low power

AD7933/AD7934

REFIN/

REFOUT

2.5V

8 mW max at 1.5 MSPS with 3 V supplies

16 mW max at 1.5 MSPS with 5 V supplies

4 analog input channels with a sequencer

Software configurable analog inputs

4-channel single-ended inputs

2-channel fully differential inputs

2-channel pseudo-differential inputs

Accurate on-chip 2.5 V reference

Wide input bandwidth

VREF

CLKIN

12-/10-BIT

SAR ADC

AND

I/P

CONVST

T/H

MUX

CONTROL

BUSY

SEQUENCER

PARALLEL INTERFACE/CONTROL REGISTER

DRIVE

70 dB SNR at 50 kHz input frequency

No pipeline delays

High speed parallel interface—word/byte modes

Full shutdown mode: 1 µA max

28 lead TSSOP package

DB0 DB11

CS RD WR W/B

DGND

Figure 1.

GENERAL DESCRIPTION

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 register

allows the user to set up different operating conditions,

including analog input range and configuration, output coding,

power management, and channel sequencing.

The AD7933/AD7934 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 to 1.5 MSPS. The parts contain a low noise,

wide bandwidth, differential track-and-hold amplifier that can

handle input frequencies up to 20 MHz.

The AD7933/AD7934 feature 4 analog input channels with a

channel sequencer to allow a consecutive sequence of channels

to be converted on. These parts can accept either single-ended,

fully differential, or pseudo-differential analog inputs.

PRODUCT HIGHLIGHTS

1. High throughput with low power consumption.

2. Four 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.

5. Single-supply operation with V_DRIVEfunction. The V_DRIVE

function allows the parallel interface to connect directly to

The conversion process and data acquisition are controlled

using standard control inputs, which allows for easy interfacing

to microprocessors and DSPs. The input signal is sampled on

the falling edge of

and the conversion is also initiated

CONVST

at this point.

3 V, or 5 V processor systems independent of V_DD

6. No pipeline delay.

The AD7933/AD7934 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.

7. Accurate control of the sampling instant via a

CONVST

input and once off conversion control.

Rev. PrG

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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