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AD7992 датащи(PDF) 1 Page - Analog Devices |
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AD7992 датащи(HTML) 1 Page - Analog Devices |
1 / 21 page AD7992 a REV. PrH 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 2-Channel, 12-Bit ADC with I2C Compatible Interfacein10-LeadMSOP Preliminary Technical Data PRELIMINARYTECHNICAL DATA FUNCTIONAL BLOCK DIAGRAM FEATURES 12-Bit ADC with Fast Conversion Time: 2 µµµµµs Two 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 10-Lead MSOP Package GENERAL DESCRIPTION The AD7992 is a 12-bit, high speed, low power, succes- sive-approximation ADC. The part operates from a single 2.7 V to 5.5 V power supply and features a conversion time of 2 µs. The part contains a two channel multiplexer and track/hold amplifier which can handle input frequen- cies in excess of TBD kHz. The AD7992 provides a two-wire serial interface which is compatible with I 2C interfaces. The part comes in two versions, AD7992-0, and AD7992-1. Each version allows for a minimum of two different I 2C addresses. The AD7992-0 supports Standard and Fast I 2C interface Modes, while the AD7992-1 supports Standard, Fast, and two High-Speed I 2C Interface Modes. The AD7992 normally remains in a power-down state while not converting, powering up only to perform con- versions. The conversion process can be controlled using the CONVST pin, an Automatic Conversion Cycle se- lected through software control, or a mode where conver- sions occur across read Address operations. The AD7992 uses advanced design techniques to achieve low power dissipation with a fast conversion time. There are no pipe- line delays associated with the part. The reference for the part is applied externally and can be in the range of 1.2V to VDD. This allows the widest dy- namic input range to the ADC. 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. This output can be used as an interrupt. PRODUCT HIGHLIGHTS 1. 2 µs Conversion time with low power consumption. 2. I 2C Compatible Serial Interface with pin selectable addresses. Two AD7992 versions allow five AD7992 devices to be connected to the same serial bus. 3. The part features 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 I 2C is a registered trademark of Philips Corporation T/H VIN1 12-BIT SUCCESSIVE APPROXIMATION ADC CONTROL LOGIC I/P MUX VIN2/REFIN AD7992 VDD SCL I2C INTERFACE DATAHIGH LIMIT REGISTER CH1 DATALOW LIMIT REGISTER CH1 CONVERSION RESULT REGISTER CONFIGURATION REGISTER DATALOW LIMIT REGISTER CH0 DATAHIGH LIMIT REGISTER CH0 CYCLE TIMER REGISTER ALERT STATUS REGISTER SDA GND ALERT CONVST GND AS OSCILLATOR HYSTERESIS REGISTER CH0 HYSTERESIS REGISTER CH1 Part Number No. of Bits No. of Channels Package AD7998 1 2 8 20 TSSOP AD7994 1 2 4 16 TSSOP AD7997 1 0 8 20 TSSOP AD7993 1 0 4 16 TSSOP Table 1. Related Products |
Аналогичный номер детали - AD7992 |
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Аналогичное описание - AD7992 |
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