Diodes AUR3852 - Manual (Page 12)

Data Sheet
Enhanced Multi-touch Capacitive Touch Screen Controller AUR3852
Feb. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
12
Electrical Characteristics
DA/AC Characteristics for AFE
T
A
=–40°C to 85°C, V
DD
=3.3V, I
2
C bus frequency=400kHz, 12-bit mode, unless otherwise noted.
Parameter Symbol Test Condition Min Typ Max Unit
ADC DC Accuracy
Resolution 12 Bits
No Missing Codes Standard/Fast mode 11 12 Bits
Integral Linearity Error INL Standard/Fast mode ±3 LSB
Differential Linearity Error
Offset Error
Gain Error
DNL External V
REF
±1.5
±6
±4
LSB
LSB
LSB
Analog Input
Full-scale Input Span
Absolute Input Range 0
-0.2
V
DD
V
DD
+0.2
V
V
ADC Sampling Dynamics
Throughput Rate 250 ksps
Reference Input
Input Voltage Range 1.8 V
DD
V
Switched-capacitor Integrator
Output Voltage Range 0.3 V
DD
-0.3 V
Integrator Capacitor C
INT
12 pF
Power Supply
Supply Voltage V
DD
Operating voltage 2.8 3.6 V
Charge Pump Voltage XCP 1.8 3.6 V
Quiescent Current
Standard mode: IOSC=
2MHz to 24MHz
1
TBD mA
Low-speed mode: IOSC
=32KHz
TBD
µA
Power-down mode,
V
DDEN
=low
3
µA
Temperature Range
Specified Performance -40 85 °C
3.3V to 1.8V LDO
Internal 1.8V Regulator
Output
V
DD18
,
15mA
1.6 1.8 2.0 V
Output Voltage Trimming
Level
-2/4/6 0 2/4/6 %
Internal OSC
Frequency 2 24 MHz
Operating Current
Operating frequency
=12MHz
50
µA
Frequency Trimming
Level -10/20/
30
0 10/20/30 %
External Clock
Frequency 2 24 MHz
Operating Current
Operating frequency=
12MHz
50
µA