4-Channel, 1 MSPS, 12-Bit ADC with Sequencer in 16-Lead TSSOP Known Good Die AD7924-KGD FEATURES FUNCTIONAL BLOCK DIAGRAM AV DD Fast throughput rate: 1 MSPS Specified for AV of 2.7 V to 5.25 V DD REF IN Low power V 0 IN 6 mW maximum at 1 MSPS with 3 V supplies T/H 12-BIT 13.5 mW maximum at 1 MSPS with 5 V supplies SUCCESSIVE V 1 APPROXIMATION IN 4 single-ended inputs with sequencer ADC I/P Wide input bandwidth: 70 dB SNR at 50 kHz input frequency MUX V 2 Flexible power/serial clock speed management IN No pipeline delays V 3 High speed serial interface: SPI/QSPI/MICROWIRE/DSP IN SCLK compatible DOUT Shutdown mode: 0.5 A maximum SEQUENCER CONTROL LOGIC DIN 16-lead TSSOP package CS Qualified for automotive applications Known good die (KGD): these die are fully guaranteed to AD7924-KGD V DRIVE data sheet specifications. AGND GENERAL DESCRIPTION Figure 1. The AD7924-KGD is a 12-bit, high speed, low power, 4-channel PRODUCT HIGHLIGHTS successive approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates up to 1. High Throughput with Low Power Consumption. 1 MSPS. The part contains a low noise, wide bandwidth track-and- The AD7924-KGD offers throughput rates up to 1 MSPS. hold amplifier that can handle input frequencies in excess of 8 MHz. At the maximum throughput rate with 3 V supplies, the AD7924-KGD dissipates only 6 mW of power maximum. The conversion process and data acquisition are controlled using 2. Four Single-Ended Inputs with Channel Sequencer. CS and the serial clock signal, allowing the device to easily interface A consecutive sequence of channels can be selected, with microprocessors or DSPs. The input signal is sampled on through which the ADC will cycle and convert on. CS the falling edge of and conversion is initiated at this point. 3. Single-Supply Operation with VDRIVE Function. There are no pipeline delays associated with the part. The AD7924-KGD operates from a single 2.7 V to 5.25 V The AD7924-KGD uses advanced design techniques to achieve supply. The VDRIVE function allows the serial interface to very low power dissipation at maximum throughput rates. At connect directly to 3 V or 5 V processor systems, maximum throughput rates, the AD7924-KGD consumes 2 mA independent of V . DD maximum with 3 V supplies with 5 V supplies, the current 4. Flexible Power/Serial Clock Speed Management. consumption is 2.7 mA maximum. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced by increasing Through the configuration of the control register, the analog input the serial clock speed. The part also features two shutdown range for the part can be selected as 0 V to REF or 0 V to 2 IN modes to maximize power efficiency at lower throughput REF , with either straight binary or twos complement output IN rates. Current consumption is 0.5 A maximum when in coding. The AD7924-KGD features four single-ended analog full shutdown. inputs with a channel sequencer to allow a preprogrammed 5. No Pipeline Delay. selection of channels to be converted sequentially. The part features a standard successive approximation The conversion time for the AD7924-KGD is determined by the ADC with accurate control of the sampling instant via SCLK frequency, which is also used as the master clock to control the CS input and once-off conversion control. the conversion. Additional application and technical information can be found in the AD7924 data sheet. Rev. A Document Feedback 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 20112014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 10106-001AD7924-KGD Known Good Die TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................6 General Description ......................................................................... 1 ESD Caution...................................................................................6 Functional Block Diagram .............................................................. 1 Pin Configuration and Function Descriptions ..............................7 Product Highlights ........................................................................... 1 Outline Dimensions ..........................................................................8 Revision History ............................................................................... 2 Die Specifications and Assembly Recommendations ..............8 Specifications ..................................................................................... 3 Ordering Guide .............................................................................8 Timing Specifications .................................................................. 5 REVISION HISTORY 11/14Rev. 0 to Rev. A Change to Bond Pad Composition Value, Table 5 ....................... 8 10/11Revision 0: Initial Version Rev. A Page 2 of 8