AD7356_08 AD [Analog Devices], AD7356_08 Datasheet

AD7356_08

Manufacturer Part Number

AD7356_08

Description

Differential Input, Dual, Simultaneous Sampling, 5 MSPS, 12-Bit, SAR ADC

Manufacturer

AD [Analog Devices]

Datasheet

1.AD7356_08.pdf (20 pages)

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FEATURES

Dual 12-bit SAR ADC

Simultaneous sampling

Throughput rate: 5 MSPS per channel

Specified for V

No conversion latency

Power dissipation: 36 mW at 5 MSPS

On-chip reference: 2.048 V ± 0.25%, 6 ppm/°C

Dual conversion with read

High speed serial interface: SPI-/QSPI™-/MICROWIRE™-/DSP-

−40°C to +125°C operation

Available in a 16-lead TSSOP

GENERAL DESCRIPTION

The AD7356

approximation ADC that operates from a single 2.5 V power

supply and features throughput rates up to 5 MSPS. The part

contains two ADCs, each preceded by a low noise, wide band-

width track-and-hold circuit that can handle input frequencies

in excess of 110 MHz.

The conversion process and data acquisition use standard

control inputs allowing for easy interfacing to microprocessors

or DSPs. The input signal is sampled on the falling edge of CS ;

a conversion is also initiated at this point. The conversion time

is determined by the SCLK frequency.

The AD7356 uses advanced design techniques to achieve very

low power dissipation at high throughput rates. With a 2.5 V

supply and a 5 MSPS throughput rate, the part consumes typically

14 mA. The part also offers a flexible power/throughput rate

management option.

The analog input range for the part is the differential common

mode ±V

that can be overdriven when an external reference is preferred.

The AD7356 is available in a 16-lead thin shrink small outline

package (TSSOP).

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.

Protected by U.S. Patent No. 6,681,332.

compatible

REF

/2. The AD7356 has an on-chip 2.048 V reference

is a dual, 12-bit, high speed, low power, successive

at 2.5 V

Differential Input, Dual, Simultaneous

Sampling, 5 MSPS, 12-Bit, SAR ADC

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

PRODUCT HIGHLIGHTS

Table 1. Related Devices

Generic

AD7352

AD7266

AD7866

AD7366

AD7367

REF

INA+

INA–

INB+

INB–

Two Complete ADC Functions.

These functions allow simultaneous sampling and

conversion of two channels. The conversion result of both

channels is simultaneously available on separate data lines

or in succession on one data line if only one serial port is

available.

High Throughput with Low Power Consumption.

The AD7356 offers a 5 MSPS throughput rate with 36 mW

power consumption.

No Conversion Latency.

The AD7356 features two standard successive approx-

imation ADCs with accurate control of the sampling

instant via a CS input and, once off, conversion control.

REF

Resolution

12-bit

14-bit

FUNCTIONAL BLOCK DIAGRAM

AGND

T/H

BUF

AGND

Throughput

3 MSPS

2 MSPS

1 MSPS

Figure 1.

APPROXIMATION

SUCCESSIVE

CONTROL

REFGND

LOGIC

12-BIT

ADC

DRIVE

Analog Input

Differential

Differential/single ended

Single-ended

Single-ended bipolar

DGND

AD7356

www.analog.com

SDATA

SCLK

SDATA

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