AD7356 Analog Devices Data Sheet

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

AD7356 FEATURES FUNCTIONAL BLOCK DIAGRAM

VDRIVEVDD

Dual 12-bit SAR ADC Simultaneous sampling

AD7356

Throughput rate: 5 MSPS per channel

VINA+

12-BIT

Specified for VDD at 2.5 V T/H

SUCCESSIVE

VINA– SDATAA

APPROXIMATION

No conversion latency ADC

Power dissipation: 36 m W 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- CONTROL

LOGIC

compatible

−40°C to +125°C operation Available in a 16-lead TSSOP

12-BIT SUCCESSIVE

VINB+ SDATAB

APPROXIMATION

VINB–

AGND DGNDREFGNDAGND

Figure 1.

GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The AD73561 is a dual, 12-bit, high speed, low power, successive 1. Two Complete ADC Functions. approximation ADC that operates from a single 2.5 V power www.BDTIC.com/ADI These functions allow simultaneous sampling and supply and features throughput rates up to 5 MSPS. The part conversion of two channels. The conversion result of both contains two ADCs, each preceded by a low noise, wide band- channels is simultaneously available on separate data lines width track-and-hold circuit that can handle input frequencies or in succession on one data line if only one serial port is in excess of 110 MHz. available.

2. High Throughput with Low Power Consumption.

The conversion process and data acquisition use standard

The AD7356 offers a 5 MSPS throughput rate with 36 m W

control inputs allowing for easy interfacing to microprocessors

power consumption.

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

3. No Conversion Latency.

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

The AD7356 features two standard successive approx-

is determined by the SCLK frequency.

imation ADCs with accurate control of the sampling

The AD7356 uses advanced design techniques to achieve very

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

low power dissipation at high throughput rates. With a 2.5 V supply and a 5 MSPS throughput rate, the part consumes typically

Table 1. Related Devices

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

Generic Resolution Throughput Analog Input

management option.

AD7352 12-bit 3 MSPS Differential The analog input range for the part is the differential common AD7266 12-bit 2 MSPS Differential/single ended mode ±VREF/2. The AD7356 has an on-chip 2.048 V reference AD7866 12-bit 1 MSPS Single-ended that can be overdriven when an external reference is preferred. AD7366 12-bit 1 MSPS Single-ended bipolar AD7367 14-bit 1 MSPS Single-ended bipolar

The AD7356 is available in a 16-lead thin shrink small outline package (TSSOP).

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

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

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

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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved.