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AD1674JRZ-REEL View Datasheet(PDF) - Analog Devices

Part Name
Description
Manufacturer
AD1674JRZ-REEL
ADI
Analog Devices ADI
AD1674JRZ-REEL Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
AD1674
PIN DESCRIPTION
Symbol Pin No. Type Name and Function
AGND
9
P
A0
4
DI
BIP OFF 12
AI
CE
6
DI
CS
3
DI
DB11–DB8 27–24 DO
DB7–DB4 23–20 DO
DB3–DB0 19–16 DO
DGND
15
P
REF OUT 8
AO
R/C
5
DI
REF IN
10
AI
STS
28
DO
VCC
7
P
VEE
11
P
VLOGIC
1
P
10 VIN
13
AI
20 VIN
14
AI
12/8
2
DI
Analog Ground (Common).
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, A0 = LOW enables the 8 most significant bits
(DB4–DB11), and A0 = HIGH enables DB3–DB0 and sets DB7–DB4 = 0.
Bipolar Offset. Connect through a 50 resistor to REF OUT for bipolar operation or to Analog
Common for unipolar operation.
Chip Enable. Chip Enable is Active HIGH and is used to initiate a convert or read operation.
Chip Select. Chip Select is Active LOW.
Data Bits 11 through 8. In the 12-bit format (see 12/8 and A0 pins), these pins provide the up-
per 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.
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 Ao is LOW and all zeroes when A0 is HIGH.
Data Bits 3 through 0. In the 12-bit format these pins provide the lower 4 bits of data. In the
8-bit format these pins provide the lower 4 bits of data when A0 is HIGH, they are disabled
when A0 is LOW.
Digital Ground (Common).
+10 V Reference Output.
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 stand-alone mode, the falling edge of R/C initiates a conversion.
Reference Input is connected through a 50 resistor to +10 V Reference for normal operation.
Status is Active HIGH when a conversion is in progress and goes LOW when the conversion is
completed.
+12 V/+15 V Analog Supply.
–12 V/–15 V Analog Supply.
+5 V Logic Supply.
10 V Span Input, 0 V to +10 V unipolar mode or –5 V to +5 V bipolar mode. When using the
AD1674 in the 20 V Span 10 VIN should not be connected.
20 V Span Input, 0 V to +20 V unipolar mode or –10 V to +10 V bipolar mode. When using
the AD1674 in the 10 V Span 20 VIN should not be connected.
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).
TYPE:
AI = Analog Input
AO = Analog Output
DI = Digital Input
DO = Digital Output
P = Power
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATION
12/8
CS
A0
CE
R/C
REF OUT
10V
REF
CONTROL
CLOCK
SAR
12
AGND
20k
REF IN
5k
BIP OFF
20VIN
5k
10VIN
2.5k
COMP
12
10k
10k
DAC
IDAC
5k
2.5k
SHA
AD1674
STS
VLOGIC 1
12/8 2
CS 3
28 STS
27 DB11(MSB)
26 DB10
A0 4
25 DB9
R/C 5
24 DB8
CE 6
23 DB7
VCC
REF OUT
7 AD1674 22 DB6
TOP VIEW
8 (Not to Scale) 21 DB5
DB11 (MSB)
AGND 9
20 DB4
12 DB0 (LSB)
REF IN 10
19 DB3
VEE 11
BIP OFF 12
18 DB2
17 DB1
10VIN 13
20VIN 14
16 DB0(LSB)
15 DGND
REV. C
–7–
 

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