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AD7880BR датащи(PDF) 1 Page - Analog Devices |
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AD7880BR датащи(HTML) 1 Page - Analog Devices |
1 / 16 page 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a LC2MOS Single +5 V Supply, Low Power, 12-Bit Sampling ADC AD7880 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FUNCTIONAL BLOCK DIAGRAM + – R R SAMPLING COMPARATOR CONTROL LOGIC SAR + COUNTER CLKIN CS CONVST RD BUSY MODE V DD LOW POWER CONTROL CIRCUIT V INA V INB V REF AGND DGND DB0 DB11 12-BIT DAC AD7880 THREE STATE BUFFERS FEATURES 12-Bit Monolithic A/D Converter 66 kHz Throughput Rate 12 s Conversion Time 3 s On-Chip Track/Hold Amplifier Low Power Power Save Mode: 2 mW typ Normal Operation: 25 mW typ 70 dB SNR Fast Data Access Time: 57 ns Small 24-Lead SOIC and 0.3" DIP Packages APPLICATIONS Battery Powered Portable Systems Digital Signal Processing Speech Recognition and Synthesis High Speed Modems Control and Instrumentation GENERAL DESCRIPTION The AD7880 is a high speed, low power, 12-bit A/D converter which operates from a single +5 V supply. It consists of a 3 µs track/hold amplifier, a 12 µs successive-approximation ADC, versatile interface logic and a multiple-input-range circuit. The part also includes a power save feature. An internal resistor network allows the part to accept both uni- polar and bipolar input signals while operating from a single +5 V supply. Fast bus access times and standard control inputs ensure easy interfacing to modern microprocessors and digital signal processors. The AD7880 features a total throughput time of 15 µs and can convert full power signals up to 33 kHz with a sampling fre- quency of 66 kHz. In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the AD7880 is also fully specified for dynamic performance parameters including har- monic distortion and signal-to-noise ratio. The AD7880 is fabricated in Analog Devices’ Linear Compat- ible CMOS (LC 2MOS) process, a mixed technology process that combines precision bipolar circuits with low power CMOS logic. The part is available in a 24-pin, 0.3 inch-wide, plastic or hermetic dual-in-line package (DIP) as well as a small 24-lead SOIC package. PRODUCT HIGHLIGHTS 1. Fast Conversion Time. 12 µs conversion time and 3 µs acquisition time allow for large input signal bandwidth. This performance is ideally suited for applications in areas such as telecommunications, audio, sonar and radar signal processing. 2. Low Power Consumption. 2 mW power consumption in the power-down mode makes the part ideally suited for portable, hand held, battery pow- ered applications. 3. Multiple Input Ranges. The part features three user-determined input ranges, 0 V to +5 V, 0 V to 10 V and ±5 V. These unipolar and bipolar ranges are achieved with a 5 V only power supply. |
Аналогичный номер детали - AD7880BR |
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Аналогичное описание - AD7880BR |
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