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AD1671AQ Datasheet(PDF) 4 Page - Analog Devices |
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AD1671AQ Datasheet(HTML) 4 Page - Analog Devices |
4 / 16 page AD1671 REV. B –4– PIN DESCRIPTION Symbol Pin No. Type Name and Function ACOM 27 P Analog Ground. AIN 22, 23 AI Analog Inputs, AIN1 and AIN2. The AD1671 can be pin strapped for four input ranges: Range Pin Strap Signal Input 0 to +2.5 V, ±2.5 V Connect AIN1 to AIN2 AIN1 or AIN2 0 to +5 V, ±5 V Connect AIN1 or AIN2 to ACOM AIN1 or AIN2 BIT 1 (MSB) 13 DO Most Significant Bit. BIT 2–BIT 11 12-3 DO Data Bits 2 through 11. BIT 12 (LSB) 2 DO Least Significant Bit. BPO/UPO 26 AI Bipolar or Unipolar Configuration Pin. See section on Input Range Connections for details. DAV 16 DO Data Available Output. The rising edge of DAV indicates an end of conversion and can be used to latch current data into an external register. The falling edge of DAV can be used to latch previous dam into an external register. DCOM 19 P Digital Ground. ENCODE 17 DI The analog input is sampled on the rising edge of ENCODE. MSB 14 DO Inverted Most Significant Bit. Provides twos complement output data format. OTR 15 DO Out of Range is Active HIGH when the analog input is out of range. See Output Data Format, Table III. REF COM 20 AI REF COM is the internal reference ground pin. REF COM should be connected as indicated in the Grounding and Decoupling Rules and Optional External Reference Connection Sections. REF IN 24 AI REF IN is the external 2.5 V reference input. REF OUT 21 AO REF OUT is the internal 2.5 V reference output. SHA OUT 25 AO No Connect for bipolar input ranges. Connect SHA OUT to BPO/UPO for unipolar input ranges. VCC 28 P +5 V Analog Power. VEE 1 P –5 V Analog Power. VLOGIC 18 P +5 V Digital Power. TYPE: AI = Analog Input; AO = Analog Output; DI = Digital Input; DO = Digital Outputs; P = Power. PIN CONFIGURATION ACOM BPO/UPO DCOM ENCODE DAV OTR MSB BIT 12 (LSB) BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 (MSB) AIN1 REF COM REF OUT AIN2 SHA OUT 1 2 3 7 28 27 26 22 8 9 10 21 20 19 11 12 18 17 4 5 25 24 6 23 TOP VIEW (Not to Scale) 13 14 16 15 AD1671 VEE VCC V LOGIC REF IN |
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