AD7156 Analog Devices, AD7156 Datasheet - Page 15

• Manufacturer Part Number: AD7156
• Manufacturer: Analog Devices

Specifications of AD7156

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 100SPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Capacitive
• Ain Range: 0.5 pF,1 pF,2 pF,4 pF
• Pkg Type: CSP

REGISTER DESCRIPTIONS
Table 5. Register Summary
Register
Status
Ch 1 Data High
Ch 1 Data Low
Ch 2 Data High
Ch 2 Data Low
Ch 1 Average High
Ch 1 Average Low
Ch 2 Average High
Ch 2 Average Low
Ch 1 Sensitivity/
Ch 1 Threshold High
Ch 1 Timeout/
Ch 1 Threshold Low
Ch 1 Setup
Ch 2 Sensitivity/
Ch 2 Threshold High
Ch 2 Timeout/
Ch 2 Threshold Low
Ch 2 Setup
Configuration
Power-Down Timer
Ch 1 CAPDAC
Ch 2 CAPDAC
Serial Number 3
Serial Number 2
Serial Number 1
Serial Number 0
Chip ID
1
The default values are given in parentheses.
Addr Pointer
Dec
0
1
2
3
4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
5
6
7
8
1
Hex
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
R/W
R/W
R
R/W
R
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
Bit 7
(0)
Ch 1 sensitivity (in adaptive threshold mode)/Ch 1 threshold high byte (in fixed threshold mode)
Ch 1 timeout (in adaptive threshold mode)/CH 1threshold low byte (in fixed threshold mode)
Ch 2 sensitivity (in adaptive threshold mode)/Ch 2 threshold high byte (in fixed threshold mode)
Ch 2 timeout (in adaptive threshold mode)/Ch 2 threshold low byte (in fixed threshold mode)
Serial number—Byte 2
Serial number—Byte 1
Chip identification code
PwrDown
Serial number—Byte 3 (MSB)
Serial number—Byte 0 (LSB)
ThrFixed
DacEn1
DacEn2
RngH1
RngH2
(0)
(0)
(0)
(0)
(1)
(1)
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Bit 6
DacStep2
(1)
DacAuto1
DacAuto2
ThrMD1
RngL1
RngL2
(0)
(0)
(0)
(1)
(1)
(1)
Bit 5
OUT2
(0)
ThrMD0
(0)
(0)
(0)
Bit 4
DacStep1
(1)
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x08
0x86
0x08
0x86
EnCh1
Hyst1
Hyst2
Power-down timeout (6-bit value)
(1)
(0)
(0)
DacValue1 (6-bit value)
DacValue2 (6-bit value)
Bit 3
OUT1
(0)
EnCh2
(0x00)
(0x00)
(0x00)
(1)
ThrSettling1 (4-bit value)
ThrSettling2 (4-bit value)
Bit 2
C1/C2
(0)
MD2
(0)
(0x0B)
(0x0B)
Bit 1
RDY2
(1)
MD1
(0)
AD7156
Bit 0
RDY1
(1)
MD0
(1)