HD155121F Datasheet, PDF (39/57 Pages) Hitachi Semiconductor – RF Transceiver IC for GSM and PCN Dual band cellular systems

HD155121F
PGA and Demodulator Typical Performance (cont)
20
0
−20
−40
−60
−80
10
Frequency response of LPF in Demodulator
sim.(typical)
sim.(worst)
100 1000 10000 100000
Frequency (kHz)
Frequency (kHz) sim.(typ) sim.(worst)
10
0.0
0.0
120
−1.2
−0.5
200
−4.0
−1.6
400
−14.0 −7.9
600
−22.3 −14.7
800
−29.2 −20.3
1600
−49.8 −37.6
3000
−47.3 −46.3
20000
−62.3 −58.7
IQ offset voltage vs. V_CC and Temperature
GSM mode
60
Operating voltage range
40
20
0
−20
−40
−60
2
I Ta=−40°C
I Ta=−25°C
I Ta=27°C
I Ta=85°C
I Ta=100°C
Q Ta=−40°C
Q Ta=−25°C
Q Ta=27°C
Q Ta=85°C
Q Ta=100°C
2.5
3
3.5
4
4.5
V_CC (V)
IQ offset voltage vs. V_CC and Temperature
PCN mode
60
Operating voltage range
40
20
0
−20
−40
−60
2
I Ta=−40°C
I Ta=−25°C
I Ta=27°C
I Ta=85°C
I Ta=100°C
Q Ta=−40°C
Q Ta=−25°C
Q Ta=27°C
Q Ta=85°C
Q Ta=100°C
2.5
3
3.5
4
4.5
V_CC (V)
39