AD1671S View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD1671S Datasheet PDF : 16 Pages
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AD1671
Symbol
Pin No.
PIN DESCRIPTION
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
0 to +5 V, ± 5 V
Connect AIN1 or AIN2 to ACOM
AIN1 or AIN2
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
VEE 1
BIT 12 (LSB) 2
28 VCC
27 ACOM
BIT 11 3
26 BPO/UPO
BIT 10 4
25 SHA OUT
BIT 9 5
24 REF IN
BIT 8 6
BIT 7 7
BIT 6 8
BIT 5 9
AD1671
TOP VIEW
(Not to Scale)
23 AIN1
22 AIN2
21 REF OUT
20 REF COM
BIT 4 10
19 DCOM
BIT 3 11
BIT 2 12
18 VLOGIC
17 ENCODE
BIT 1 (MSB) 13
16 DAV
MSB 14
15 OTR
–4–
REV. B
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