SimCom SIM8905A User Manual page 24

Module
LDO5_1V8
USIM_VDD
USIM_RST
SUIM_CLK
USIM_DET
USIM_DAT
Note:
USIM_DAT has been pulled up with a 10kohm resistor to USIM_VDD in module.
A 220nF shut capacitor on USIM_VDD is used to reduce interference.
ADC
SIM8905A provides one 16bits ADC. Its performance parameters are shown as the following table.
Table 15: ADC performance parameters
Parameter
Input voltage range
Resolution
Analog input bandwidth
Sample rate
INL
DNL
Offset error
Gain error
Vibrator
SIM8905A supports silent incoming-call alarms with its vibration motor driver. The vibration driver is a
programmable voltage output that is referenced to VBAT; when off, its output voltage is VBAT. The motor is
connected between VBAT and the VIB_DRV_N pin. The programmable motor voltage ranges from 1.2 to 3.1 V in
100 mV steps.
100K
220nF
Figure 1: USIM card reference circuit
Comments
Programmable
XO/8
15-bit output
15-bit output
Relative to full-scale
Relative to full-scale
Smart Machine Smart Decision
22R
22R
22R
22pF
Min Typ
0.1
0.3
- 16
- 100
- 2.4
-
-
-
-
24
USIM Card
VCC GND
RST VPP
CLK I/O
DET COM
TVS
C<30pF
Max Unit
- 1.7 V
- 4.5
- bits
- kHz
- MHz
- ±8 LSB
- ±4 LSB
- ±1 %
- ±1 %