AD7147A Analog Devices, AD7147A Datasheet - Page 41

• Manufacturer Part Number: AD7147A
• Manufacturer: Analog Devices

Specifications of AD7147A

• Resolution (bits): 16bit
• # Chan: 13
• Sample Rate: 111SPS
• Interface: I²C/Ser 2-Wire,Ser,SPI
• Analog Input Type: Capacitive
• Ain Range: ± 8 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

DETAILED REGISTER DESCRIPTIONS
BANK 1 REGISTERS
All addresses and default values are expressed in hexadecimal.
Table 21. PWR_CONTROL Register
Address
0x000
Data Bit
[1:0]
[3:2]
[7:4]
[9:8]
[10]
[11]
[12]
[13]
[15:14]
Default
Value
0
0
0
0
0
0
0
0
0
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Name
POWER_MODE
LP_CONV_DELAY
SEQUENCE_STAGE_NUM
DECIMATION
SW_RESET
INT_POL
EXT_SOURCE
Unused
CDC_BIAS
Rev. B | Page 41 of 68
Operating modes
Low power mode conversion delay
ADC decimation factor
Software reset control (self-clearing)
CDC bias current control
Description
00 = full power mode (normal operation, CDC
conversions approximately every 36 ms)
01 = full shutdown mode (no CDC conversions)
10 = low power mode (automatic wake-up operation)
11 = full shutdown mode (no CDC conversions)
00 = 200 ms
01 = 400 ms
10 = 600 ms
11 = 800 ms
Number of stages in sequence (N + 1)
0000 = 1 conversion stage in sequence
0001 = 2 conversion stages in sequence
…
Maximum value = 1011 = 12 conversion stages per
sequence
00 = decimate by 256
01 = decimate by 128
10 = decimate by 64
11 = decimate by 64
1 = resets all registers to default values
Interrupt polarity control
0 = active low
1 = active high
Excitation source control
0 = enable excitation source to CINx pins
1 = disable excitation source to CINx pins
Set to 0
00 = normal operation
01 = normal operation + 20%
10 = normal operation + 35%
11 = normal operation + 50%
AD7147A