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AD7994BRU-0 データシート(PDF) 1 Page - Analog Devices |
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AD7994BRU-0 データシート(HTML) 1 Page - Analog Devices |
1 / 27 page AD7994/AD7993 a REV. PrF 09/03 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 200 3 4-Channel, 12-/10-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP Preliminary Technical Data PRELIMINARYTECHNICAL DATA FUNCTIONAL BLOCK DIAGRAM FEATURES 12-Bit ADC with Fast Conversion Time: 2 µµµµµs Four Single-Ended Analog Input Channels Specified for VDD of 2.7 V to 5.5 V Low Power Consumption Fast Throughput Rate:- 188 KSPS Sequencer Operation Automatic Cycle Mode I2CR Compatible Serial Interface I2CR Interface supports: Standard, Fast, and High-Speed Modes Out of Range Indicator/Alert Function Pin-Selectable Addressing via AS Two Versions Allow Five I 2C Addresses Shutdown Mode: 1µA max 16-Lead TSSOP Package GENERAL DESCRIPTION The AD7994/AD7993 are 4 channel, 12-/10-bit, high speed, low power, successive-approximation ADCs re- spectively. They operate from a single 2.7 V to 5.5 V power supply and feature a conversion time of 2 µs. The parts contain a four channel multiplexer and track/hold amplifier which can handle input frequencies in excess of TBD kHz. The AD7994/AD7993 provide a two-wire serial interface which is compatible with I 2C interfaces. The parts come in two versions, AD7994-0/AD7993-0 to AD7994-1/ AD7993-1. Each version allows for a minimum of two different I 2C addresses. The I2C interface on the AD7994- 0/AD7993-0 supports Standard and Fast I 2C Interface Modes. The I 2C interface on the AD7994-1/AD7993-1 supports Standard, Fast and two High-Speed I 2C Interface Modes. The AD7994/AD7993 normally remain in a shutdown state while not converting, powering up only for conver- sions. The conversion process can be controlled using the CONVST pin, an Automatic Conversion Cycle selected through software control, or a mode where conversions occur across Write operations. There are no pipeline de- lays associated with the part. The reference for the part is applied externally to the REFIN pin and can be in the range of 1.2V to VDD. This allows the widest dynamic input range to the ADC. PRODUCT HIGHLIGHTS 1. 2 µs Conversion time with low power consumption. 2. I 2C Compatible Serial Interface with pin selectable addresses. Two AD7994/AD7993 versions allow five AD7994/AD7993 devices to be connected to the same serial bus. 3. The parts feature automatic shutdown while not convert- ing to maximize power efficiency. Current consumption is 1 µA max when in shutdown. 4. Reference can be driven up to the power supply. 5. Out of Range Indicator which can be software disabled/ enabled. 6. Oneshot and automatic conversion rates. 7. No Pipeline Delay The part features a standard successive-approximation ADC. SMBus is a trademark and I2C is a registered trademark of Philips Corporation T/H VIN1 12-/10-BIT SUCCESSIVE APPROXIMATION ADC CONTROL LOGIC I/P MUX VIN2 AD7994/AD7993 VDD SCL I2C INTERFACE CONVERSION RESULT REGISTER CONFIGURATION REGISTER CYCLE TIMER REGISTER ALERT STATUS REGISTER SDA GND ALERT CONVST GND AS OSCILLATOR REFIN VIN3 VIN4 DATALOW LIMIT REGISTER CH1-CH4 DATAHIGH LIMIT REGISTER CH1-CH4 HYSTERESIS REGISTER CH1-CH4 On-chip registers can be programmed with high and low limits for the conversion result, and an open drain Out of Range Indicator output (ALERT), becomes active when the programmed high or low limits are violated by the conversion result. This output can be used as an interrupt. |
同様の部品番号 - AD7994BRU-0 |
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同様の説明 - AD7994BRU-0 |
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