12-Bit ADC in 6-Lead SOT-23 AD7476-EP FEATURES FUNCTIONAL BLOCK DIAGRAM Specified for V of 2.35 V to 5.25 V V DD DD Low power 3.6 mW at 600 kSPS with 3 V supplies 12-BIT SUCCESSIVE- 15 mW at 600 kSPS with 5 V supplies V IN APPROXIMATION ADC Wide input bandwidth 70 dB SNR at 100 kHz input frequency High speed serial interface SCLK CONTROL SPI/QSPI/MICROWIRE/DSP compatible SDATA LOGIC Standby mode: 1 A maximum CS 6-lead SOT-23 package AD7476-EP ENHANCED PRODUCT FEATURES GND Military temperature range (55C to +125C) Figure 1. Controlled manufacturing baseline One assembly/test site One fabrication site Enhanced product change notification Qualification data available upon request APPLICATIONS Battery-powered systems Personal digital assistants The reference for the part is taken internally from V . This DD Medical instruments allows the widest dynamic input range to the ADC. Thus, the Mobile communications analog input range for the part is 0 V to VDD. The conversion Instrumentation and control systems rate is determined by the SCLK pin. Data acquisition systems Additional application and technical information can be found GENERAL DESCRIPTION in the AD7476 data sheet. 1 The AD7476 is a 12-bit, high speed, low power, successive PRODUCT HIGHLIGHTS approximation ADC. The part operates from a single 2.35 V to 5.25 V power supply and features throughput rates up to 1. First 12-Bit ADC in a SOT-23 Package. 600 kSPS. The part contains a low noise, wide bandwidth, track- 2. High Throughput with Low Power Consumption. and-hold amplifier that can handle input frequencies in excess 3. Flexible Power/Serial Clock Speed Management. The of 6 MHz. conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock The conversion process and data acquisition are controlled speed increase. This allows the average power consumption CS using and the serial clock, allowing the device to interface to be reduced while not converting. The part also features a with microprocessors or DSPs. The input signal is sampled on shutdown mode to maximize power efficiency at lower CS the falling edge of and the conversion is initiated at this throughput rates. Current consumption is 1 A maximum point. There are no pipeline delays associated with this part. when in shutdown mode. 4. Reference Derived from the Power Supply. The AD7476 uses advanced design techniques to achieve very 5. No Pipeline Delay. The part features a standard successive- low power dissipation at high throughput rates. approximation ADC with accurate control of the sampling CS instant via a input and once-off conversion control. 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 Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 09224-001AD7476-EP TABLE OF CONTENTS Features .............................................................................................. 1 Timing Specifications ...................................................................5 Enhanced Product Features ............................................................ 1 Absolute Maximum Ratings ............................................................6 Applications....................................................................................... 1 ESD Caution...................................................................................6 General Description ......................................................................... 1 Pin Configuration and Function Descriptions..............................7 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ..............................................8 Product Highlights ........................................................................... 1 Outline Dimensions..........................................................................9 Revision History ............................................................................... 2 Ordering Guide .............................................................................9 Specifications..................................................................................... 3 REVISION HISTORY 8/10Revision 0: Initial Version Rev. 0 Page 2 of 12