AD7147PACPZ-1RL Analog Devices Inc, AD7147PACPZ-1RL Datasheet - Page 19

• Manufacturer Part Number: AD7147PACPZ-1RL
• Description: CAPACITANCE TO DIGITAL CONVERTER
• Manufacturer: Analog Devices Inc
• Series: CapTouch™r
• Type: Capacitive Sensor Controllerr

Specifications of AD7147PACPZ-1RL

• Resolution (bits): 16 b
• Data Interface: I²C, Serial
• Voltage Supply Source: Single Supply
• Voltage - Supply: 2.6 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-LFCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sampling Rate (per Second): -
• Lead Free Status / Rohs Status: Compliant

Table 12. Proximity Control Registers (See Figure 34)
Bit Name
FP_PROXIMITY_CNT
LP_PROXIMITY_CNT
FP_PROXIMITY_RECAL
LP_PROXIMITY_RECAL
PROXIMITY_RECAL_LVL
PROXIMITY_DETECTION_RATE
CDC CONVERSION
CDC CONVERSION
CALIBRATION
CALIBRATION
DETECTION
(INTERNAL)
DETECTION
(INTERNAL)
(INTERNAL)
(INTERNAL)
(INTERNAL)
(INTERNAL)
SEQUENCE
SEQUENCE
PROXIMITY
PROXIMITY
NOTES
1. SEQUENCE CONVERSION TIME
2. PROXIMITY IS SET WHEN USER APPROACHES THE SENSOR, AT WHICH TIME THE INTERNAL CALIBRATION IS DISABLED.
3.
t
CALDIS
USER APPROACHES
USER APPROACHES
Length
(Bits)
4
4
8
6
8
6
Figure 31. Example of Low Power Mode Proximity Detection (LP_PROXIMITY_CNT = 4)
Figure 30. Example of Full Power Mode Proximity Detection (FP_PROXIMITY_CNT = 1)
= (
SENSOR
SENSOR
t
CONV_LP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Register Address
0x002[7:4]
0x002[11:8]
0x004[9:0]
0x004[15:10]
0x003[7:0]
0x003[13:8]
× LP_PROXIMITY_CNT × 4).
SENSOR AREA
SENSOR AREA
USER LEAVES
USER LEAVES
t
CONV_LP
CALIBRATION DISABLED
CALIBRATION DISABLED
=
Rev. B | Page 19 of 72
t
CONV_FP
Description
Calibration disable time in full power mode.
Calibration disable time in low power mode.
Full power mode proximity recalibration time.
Low power mode proximity recalibration time.
Proximity recalibration level. This value multiplied by 16 controls the
sensitivity of Comparator 2 (see Figure 34).
Proximity detection rate. This value multiplied by 16 controls the
sensitivity of Comparator 1 (see Figure 34).
+ LP_CONV_DELAY.
t
t
CALDIS
CALDIS
17 18 19 20 21 22 23 24
17 18 19 20 21 22 23 24
CALIBRATION ENABLED
CALIBRATION ENABLED
t
t
CONV_FP
CONV_LP
AD7147