ad7147a-1acbz-r Analog Devices, Inc., ad7147a-1acbz-r Datasheet - Page 3

• Manufacturer Part Number: ad7147a-1acbz-r
• Description: Captouch Programmable Controller For Single-electrode Capacitance Sensors
• Manufacturer: Analog Devices, Inc.

SPECIFICATIONS
V
Table 1.
Parameter
CAPACITANCE-TO-DIGITAL CONVERTER
AC
LOGIC INPUTS (SDI, SCLK, CS, SDA, GPIO)
OPEN-DRAIN OUTPUTS (SCLK, SDA, INT)
LOGIC OUTPUTS (SDO, GPIO)
POWER
CC
Update Rate
Resolution
CINx Input Range
No Missing Codes
CINx Input Leakage
Maximum Output Load
Total Unadjusted Error
Output Noise (Peak-to-Peak)
Output Noise (RMS)
C
C
Low Power Mode Delay Accuracy
Frequency
Output Voltage
Short-Circuit Source Current
Short-Circuit Sink Current
Maximum Output Load
Input High Voltage, V
Input Low Voltage, V
Input High Current, I
Input Low Current, I
Hysteresis
Output Low Voltage, V
Output High Leakage Current, I
Output Low Voltage, V
Output High Voltage, V
GPO, SDO Floating State Leakage
V
V
I
SHIELD
CC
STRAY
STRAY
CC
DRIVE
= 2.6 V to 3.6 V, T
Current
Offset Range
Offset Resolution
IL
IH
IL
A
IH
OL
OL
= −40
OH
o
C to +85°C, unless otherwise noted.
OH
Min
8.73
17.46
34.9
16
0
0.7 × V
−1
V
2.6
1.65
DRIVE
− 0.6
DRIVE
Typ
9
18
36
16
±8
25
12
7
3
1.1
0.8
0.5
20
0.32
250
10
10
150
±0.1
3.3
0.8
1.1
1.2
1.6
15.5
2.3
Max
9.27
18.54
37.1
20
±20
4
V
150
0.4
1
0.4
±1
0.4
±1
3.6
3.6
1
1.3
1.5
1.8
24
10
Rev. 0 | Page 3 of 68
CC
Codes
Unit
ms
ms
ms
Bits
pF
Bits
nA
pF
%
Codes
Codes
Codes
Codes
Codes
pF
pF
%
kHz
V
mA
mA
pF
V
V
μA
μA
mV
V
μA
V
V
μA
V
V
mA
mA
mA
mA
μA
μA
Test Conditions/Comments
12 conversion stages, decimation = 64
12 conversion stages, decimation = 128
12 conversion stages, decimation = 256
Guaranteed by design, but not production tested
Capacitance load on CINx to ground
Decimation rate = 64
Decimation rate = 128
Decimation rate = 256
Decimation rate = 64
Decimation rate = 128
Decimation rate = 256
Percentage of 200 ms, 400 ms, 600 ms, or 800 ms
Oscillating
Capacitance load on AC
V
V
I
V
I
I
Pin three-state, leakage measured to GND and V
Serial interface operating voltage
In full power mode, V
In full power mode, V
In full power mode, V
In full power mode, V
Low power mode, converter idle, V
Register 0x00, Bits[15:14] = 01
Full shutdown, V
SINK
SINK
SOURCE
IN
IN
OUT
= V
= GND
= −1 mA
= 1 mA, V
= V
= 1 mA, V
DRIVE
DRIVE
DRIVE
DRIVE
CC
= 1.65 V to 3.6 V
+ V
= 1.65 V to 3.6 V
CC
CC
CC
CC
DRIVE
+ V
+ V
+ V
+ V
SHIELD
, Register 0x00, Bits[15:14] = 01
DRIVE
DRIVE
DRIVE
DRIVE
to ground
, Register 0x00, Bits[15:14] = 00
, Register 0x00, Bits[15:14] = 01
, Register 0x00, Bits[15:14] = 10
, Register 0x00, Bits[15:14] = 11
CC
+ V
DRIVE
, decimation = 256;
CC
AD7147A