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AD674BTD データシート(PDF) 6 Page - Analog Devices |
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AD674BTD データシート(HTML) 6 Page - Analog Devices |
6 / 12 page REV. C –6– AD674B/AD774B PIN FUNCTION DESCRIPTIONS Symbol Pin No. Type * Name and Function AGND 9 P Analog Ground (Common) A0 4 DI Byte Address/Short Cycle. If a conversion is started with A0 Active LOW, a full 12-bit conversion cycle is initiated. If A0 is Active HIGH during a convert start, a shorter 8-bit conversion cycle results. During Read (R/ C = 1) with 12/8 LOW, A 0 = LOW enables the 8 most significant bits, and A0 = HIGH enables DB3–DB0 and sets DB7–DB4 = 0. BIP OFF 12 AI Bipolar Offset. Connect through a 50 Ω resistor to REF OUT for bipolar operation or to Analog Common for unipolar operation. CE 6 DI Chip Enable. Chip Enable is Active HIGH and is used to initiate a convert or read operation. CS 3 DI Chip Select. Chip Select is Active LOW. DB11–DB8 27–24 DO Data Bits 11 through 8. In the 12-bit format (see 12/ 8 and A 0 pins) these pins provide the upper 4 bits of data. In the 8-bit format, they provide the upper 4 bits when A0 is LOW and are disabled when A0 is HIGH. DB7–DB4 23–20 DO Data Bits 7 through 4. In the 12-bit format these pins provide the middle 4 bits of data. In the 8-bit format they provide the middle 4 bits when A0 is LOW and all zeroes when A0 is HIGH. DB3–DB0 19–16 DO Data Bits 3 through 0. In both the 12-bit and 8-bit format these pins provide the lower 4 bits of data when A0 is HIGH; they are disabled when A0 is LOW. DGND 15 P Digital Ground (Common) REF OUT 8 AO 10 V Reference Output R/ C 5 DI Read/Convert. In the full control mode R/ C is Active HIGH for a read operation and Active LOW for a convert operation. In the standalone mode, the falling edge of R/ C initiates a conversion. REF IN 10 AI Reference Input is connected through a 50 Ω resistor to +10 V Reference for normal operation. STS 28 DO Status is Active HIGH when a conversion is in progress and goes LOW when the conversion is completed. VCC 7 P +12 V/+15 V Analog Supply VEE 11 P –12 V/–15 V Analog Supply VLOGIC 1 P 5 V Logic Supply 10 VIN 13 AI 10 V Span Input, 0 V to +10 V unipolar mode or –5 V to +5 V bipolar mode. When using the 20 V Span, 10 VIN should not be connected. 20 VIN 14 AI 20 V Span Input, 0 V to +20 V unipolar mode or –10 V to +10 V bipolar mode. When using the 10 V Span, 20 VIN should not be connected. 12/ 8 2 DI The 12/ 8 pin determines whether the digital output data is to be organized as two 8-bit words (12/ 8 LOW) or a single 12-bit word (12/8 HIGH). *Types: AI = Analog Input, AO = Analog Output, DI = Digital Input, DO = Digital Output, P = Power PIN CONFIGURATION TOP VIEW (Not to Scale) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 AD674B OR AD774B VLOGIC 12/ 8 CS A0 R/ C CE VCC REF OUT AGND REF IN VEE BIP OFF 10 VIN 20 VIN STS DB11 (MSB) DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 (LSB) DGND |
同様の部品番号 - AD674BTD |
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同様の説明 - AD674BTD |
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