AD7641BSTZRL 데이터 시트보기 (PDF) - Analog Devices
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AD7641BSTZRL Datasheet PDF : 14 Pages
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AD7631/AD7634
Preliminary Technical Data
Pin
No. Mnemonic
38
REFGND
39
IN−
40
VCC
41
VEE
43
IN+
45
TEMP
46
REFBUFIN
47
PDREF
48
PDBUF
Type 1
AI
AI
P
P
AI
AO
AI/O
DI
DI
Description
Reference Input Analog Ground.
Differential Negative Analog Input; referenced to IN+.
High Voltage Positive Supply.
High Voltage Negative Supply.
Differential Positive Analog Input; referenced to IN-.
Temperature Sensor Analog Output.
Reference Buffer Input.
When using an external reference with the internal buffer (PDBUF = low, PDREF = high), applying 2.5V
on this pin produces 5V on the REF pin.
When using the internal reference (PDBUF = PDREF = low), this pin should not be connected.
Internal Reference Power-Down Input.
When low, the internal reference is enabled (PDBUF also needs to be low).
When high, the internal reference is powered down and an external reference must been used.
Internal Reference Buffer Power-Down Input.
When low, the buffer is enabled (PDREF also needs to be low).
When high, the buffer is powered-down and an external reference must be used.
1 AI = analog input; AI/O = bidirectional analog; AO = analog output; DI = digital input; DI/O = bidirectional digital; DO = digital output; P = power.
Table 7. Data Bus Interface Definition
MODE MODE1 MODE0 D0/OB/2C
0
0
0
R[0]
1
0
1
OB/2C
1
0
1
OB/2C
2
1
0
OB/2C
2
1
0
OB/2C
2
1
0
OB/2C
2
1
0
OB/2C
3
1
1
OB/2C
D1/A0 D2/A1
R[1] R[2]
A0 = 0 R[2]
A0 = 1 R[0]
A0 = 0 A1 = 0
A0 = 0 A1 = 1
A0 = 1 A1 = 0
A0 = 1 A1 = 1
All Hi-Z
D[3] D[4:9]
R[3] R[4:9]
R[3] R[4:9]
R[1]
All Hi-Z
All Hi-Z
All Hi-Z
All Hi-Z
D[10:11] D[12:15] D[16:17]
R[10:11] R[12:15] R[16:17]
R[10:11] R[12:15] R[16:17]
All Zeros
R[10:11] R[12:15] R[16:17]
R[2:3]
R[4:7]
R[8:9]
R[0:1]
All Zeros
All Zeros
R[0:1]
Serial Interface
Description
18-Bit Parallel
16-Bit High Word
16-Bit Low Word
8-Bit High Byte
8-Bit Mid Byte
8-Bit Low Byte
8-Bit Low Byte
Serial Interface
Table 8. Input Range Selection. Parallel Mode and Serial Hardware Mode
Range
BIP
TEN
HW/SW (serial
mode)
0 - 5V
Low
Low
High
0 - 10V
Low
High
High
±5V
High
Low
High
±10V
High
High
High
All Ranges1
X
X
Low
1 In serial mode (MODE[1:0] = 3) when HW/SW = low, the input ranges are defined by registers.
Rev. PrC | Page 12 of 14
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