AD7148 Analog Devices, AD7148 Datasheet - Page 37

• Manufacturer Part Number: AD7148
• Manufacturer: Analog Devices

Specifications of AD7148

• Resolution (bits): 16bit
• # Chan: 8
• Sample Rate: 250kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: ± 8 pF (Delta C)
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

Table 19. AMB_COMP_CTRL0 Register
Address
0x002
Table 20. AMB_COMP_CTRL1 Register
Address
0x003
Table 21. AMB_COMP_CTRL2 Register
Address
0x004
Data Bit
[3:0]
[7:4]
[11:8]
[13:12]
[14]
[15]
Data Bit
[7:0]
[13:8]
[15:14]
Data Bit
[9:0]
[15:10]
Default
Value
0
F
F
0
0
0
Default
Value
64
1
0
Default
Value
3FF
3F
Type
R/W
R/W
R/W
R/W
R/W
R/W
Type
R/W
R/W
R/W
Type
R/W
R/W
Mnemonic
FF_SKIP_CNT
FP_PROXIMITY_CNT
LP_PROXIMITY_CNT
PWR_DOWN_TIMEOUT
FORCED_CAL
CONV_RESET
Mnemonic
PROXIMITY_RECAL_LVL
PROXIMITY_DETECTION_RATE
SLOW_FILTER_UPDATE_LVL
Mnemonic
FP_PROXIMITY_RECAL
LP_PROXIMITY_RECAL
Rev. A | Page 37 of 56
Description
Fast filter skip control (N+1)
Calibration disable period in full power mode =
FP_PROXIMITY_CNT × 16 × time taken for one
conversion sequence in full power mode
Calibration disable period in low power mode =
LP_PROXIMITY_CNT × 4 × time taken for one
conversion sequence in low power mode
Full power to low power mode time out control
Forced calibration control
Conversion reset control (self-clearing)
Description
Proximity recalibration level; value is multiplied by 16 to
get actual recalibration level
Proximity detection rate; value is multiplied by 16 to get
actual detection rate
Slow filter update level
Description
Full power mode proximity recalibration time control
Low power mode proximity recalibration time control
0000 = no sequence of results is skipped
0001 = one sequence of results is skipped for every
one allowed into fast FIFO
0010 = two sequences of results are skipped for every
one allowed into fast FIFO
1011 = maximum value = 8 sequences of results are
skipped for every one allowed into fast FIFO
0 = normal operation
1 = forces all conversion stages to recalibrate
0 = normal operation
1 = resets the conversion sequence back to STAGE0.
00 = 1.25 × (FP_PROXIMITY_CNT)
01 = 1.50 × (FP_PROXIMITY_CNT)
10 = 1.75 × (FP_PROXIMITY_CNT)
11 = 2.00 × (FP_PROXIMITY_CNT)
AD7148