Datasheet AD7892 (Analog Devices)

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LC2MOS Single Supply, 12-Bit 600 kSPS ADC AD7892 FEATURES FUNCTIONAL BLOCK DIAGRAM Fast 12-Bit ADC with 1.47
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s Conversion Time REF OUT/REF IN V 600 kSPS Throughput Rate (AD7892-3) DD 500 kSPS Throughput Rate (AD7892-1, AD7892-2) 2k
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+2.5V Single Supply Operation AD7892 MODE REFERENCE On-Chip Track/Hold Amplifier Selection of Input Ranges: DB0
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10 V or
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5 V for AD7892-1 DB2 0 V to +2.5 V for AD7892-2 DB3/RFS 12-BIT DB4/SCLK
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2.5 V for AD7892-3 ADC High Speed Serial and Parallel Interface V DB5/SDATA IN1 SIGNAL DB10/LOW Low Power, 60 mW typ V SCALING IN2 DB11/LOW Overvoltage Protection on Analog Inputs (AD7892-1 TRACK/HOLD and AD7892-3) CLOCK CONTROL LOGIC CS RD EOC CONVST AGND DGND STANDBY GENERAL DESCRIPTION
The AD7892 is fabricated in Analog Devices’ Linear Compat- The AD7892 is a high speed, low power, 12-bit A/D converter ible CMOS (LC2MOS) process, a mixed technology process that operates from a single +5 V supply. The part contains a that combines precision bipolar circuits with low power CMOS 1.47 µs successive approximation ADC, an on-chip track/hold logic. It is available in a 24-lead, 0.3" wide, plastic or hermetic amplifier, an internal +2.5 V reference and on-chip versatile DIP or in a 24-lead SOIC. interface structures that allow both serial and parallel connec- tion to a microprocessor. The part accepts an analog input range
PRODUCT HIGHLIGHTS
of ± 10 V or ± 5 V (AD7892-1), 0 V to +2.5 V (AD7892-2) and 1. The AD7892-3 features a conversion time of 1.47 µs and a ±2.5 V (AD7892-3). Overvoltage protection on the analog inputs track/hold acquisition time of 200 ns. This allows a through- for the AD7892-1 and AD7892-3 allows the input voltage to go put rate for the part up to 600 kSPS. The AD7892-1 and to ± 17 V or ± 7 V respectively without damaging the ports. AD7892-2 operate with throughput rates of 500 kSPS. The AD7892 offers a choice of two data output formats: a 2. The AD7892 operates from a single +5 V supply and con- single, parallel, 12-bit word or serial data. Fast bus access times sumes 60 mW typ making it ideal for low power and portable and standard control inputs ensure easy parallel interface to applications. microprocessors and digital signal processors. A high speed 3. The part offers a high speed, flexible interface arrangement serial interface allows direct connection to the serial ports of with parallel and serial interfaces for easy connection to microcontrollers and digital signal processors. microprocessors, microcontrollers and digital signal In addition to the traditional dc accuracy specifications such as processors. linearity, full-scale and offset errors, the part is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio. REV. C 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
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