AD7153 Analog Devices, AD7153 Datasheet - Page 16

• Manufacturer Part Number: AD7153
• Description: 12-Bit Capacitance-to-Digital Converter (1 Capacitance Input Channel)
• Manufacturer: Analog Devices

Specifications of AD7153

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 200SPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: Capacitive
• Ain Range: ±0.25 pF to ±2 pF Diff,0.5 pF to 4 pF SE
• Adc Architecture: Sigma-Delta
• Pkg Type: SOP

AD7152/AD7153
CAP SETUP REGISTERS
Address 0x0B for Channel 1
Address 0x0E Channel 2 (AD7152 Only)
Default Value 0x00
Table 10. CAP Setup Register Bit Map
Bit
Mnemonic
Default
Table 11. CAP Setup Register Bit Descriptions
Bit
7
6
5
4 to 0
CONFIGURATION REGISTER
Address Pointer 0x0F
Default Value 0x00
Table 12. Configuration Register Bit Map
Bit
Mnemonic
Default
Table 13. Configuration Register Bit Descriptions
Bit
7 to 5
4
3
2
1
0
Mnemonic
Range 1
Range 0
CAPDIFF
N/A
Mnemonic
N/A
Ch1en
Ch2en
MD2
MD1
MD0
Bit 7
Range 1
0
Bit 7
Unused
0
Description
Capacitive input range and mode setup
Range 1
0
0
1
1
These bits must be 0 for proper operation
Description
These bits must be 0 for proper operation
Ch2en = 1 enables Channel 1 for single conversion, continuous conversion, or calibration
Ch2en = 1 enables Channel 2 for single conversion, continuous conversion, or calibration
Converter mode of operation setup
MD2
0
0
0
0
1
1
1
1
Bit 6
Unused
0
Range 0
0
1
0
1
MD1
0
0
1
1
0
0
1
1
Bit 6
0
Range 0
CAPDIFF = 1 (Differential Mode)
±1 pF
±0.25 pF
±0.5 pF
±2 pF
Bit 5
Unused
0
MD0
0
1
0
1
0
1
0
1
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Bit 5
CAPDIFF
0
Mode
Idle
Continuous conversion
Single conversion
Power-down
N/A
Capacitance system offset calibration
Capacitance system gain calibration
N/A
Bit 4
Ch1en
0
Bit 4
Unused
0
Capacitive Input Range
Bit 3
Ch2en
0
Bit 3
Unused
0
CAPDIFF = 0 (Single-Ended Mode)
2 pF
0.5 pF
0.25 pF
4 pF
Bit 2
0
MD2
Bit 2
Unused
0
Bit 1
MD1
0
Bit 1
Unused
0
Bit 0
MD0
0
Bit 0
Unused
0