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AD7895AN-2 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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AD7895AN-2 bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 12 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 AD7895 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1996 5 V, 12-Bit, Serial 3.8 s ADC in 8-Pin Package FUNCTIONAL BLOCK DIAGRAM SIGNAL SCALING* 12-BIT ADC OUTPUT REGISTER TRACK/HOLD AD7895 VIN CONVST VDD GND BUSY SCLK SDATA REF IN *AD7895-10, AD7895-3 FEATURES Fast 12-Bit ADC with 3.8 s Conversion Time 8-Pin Mini-DlP and SOIC Single 5 V Supply Operation High Speed, Easy-to-Use, Serial Interface On-Chip Track/Hold Amplifier Selection of Input Ranges 10 V for AD7895-10 2.5 V for AD7895-3 0 V to +2.5 V for AD7895-2 High Input Impedance Low Power: 20 mW max 14-Bit Pin Compatible Upgrade (AD7894) GENERAL DESCRIPTION The AD7895 is a fast 12-bit ADC that operates from a single +5 V supply and is housed in a small 8-pin mini-DIP and 8-pin SOIC. The part contains a 3.8 µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface. Output data from the AD7895 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part. In addition to the traditional dc accuracy specifications such as linearity and full-scale and offset errors, the AD7895 is specified for dynamic performance parameters, including harmonic distortion and signal-to-noise ratio. The part accepts an analog input range of ±10 V (AD7895-10), ±2.5 V (AD7895-3), 0 V to 2.5 V (AD7895-2) and operates from a single +5 V supply, consuming only 20 mW max. The AD7895 features a high sampling rate mode and, for low power applications, a proprietary automatic power-down mode where the part automatically goes into power down once conversion is complete and “wakes up” before the next conver- sion cycle. The part is available in a small, 8-pin, 0.3" wide, plastic dual-in- line package (mini-DIP) and in an 8-pin, small outline IC (SOIC). PRODUCT HIGHLIGHTS 1. Fast, 12-Bit ADC in 8-Pin Package The AD7895 contains a 3.8 µs ADC, a track/hold amplifier, control logic and a high speed serial interface, all in an 8-pin package. This offers considerable space saving over alterna- tive solutions. 2. Low Power, Single Supply Operation The AD7895 operates from a single +5 V supply and consumes only 20 mW. The automatic power-down mode, where the part goes into power-down once conversion is complete and “wakes up” before the next conversion cycle, makes the AD7895 ideal for battery-powered or portable applications. 3. High Speed Serial Interface The part provides high speed serial data and serial clock lines allowing for an easy, two-wire serial interface arrangement. |
Số phần tương tự - AD7895AN-2 |
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Mô tả tương tự - AD7895AN-2 |
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