TCM4400 Datasheet, PDF (23/72 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

2.11 Voice Uplink Path
2.11.1 Global Characteristics of Voice Uplink Path
PARAMETER
TEST CONDITIONS
Maximum input range
(MICP – MICN)
Inputs 3 dBm0 (maximum digital sample
amplitude) with PGA gain. Set to 0dB
(default value).
MIN TYP MAX UNIT
32.5
mVrms
Nominal reference level
(MICP – MICN)
– 10
dBm0
Differential input resistance
(MICP – MICN)
Micro amplifier gain
Maximum input range at AUXI
Nominal reference level at AUXI
Input resistance at AUXI
Auxiliary amplifier gain
PGA absolute gain
Inputs 3 dBm0 (maximum digital sample
amplitude) with PGA gain. Set to 0dB
(default value).
90 140 200 kΩ
27
dB
365
mVrms
– 10
dBm0
140 220 300 kΩ
6
dB
4.6
dB
VULPGA code =10000
VULPGA code = 10111
– 12 dB
– 11 dB
– 12.7 – 12.2 – 11.7
– 11.3 – 10.8 – 10.3
VULPGA code = 11000
VULPGA code = 11001
– 10 dB
– 9 dB
– 10.6 – 10.1 – 9.6
– 9.5 – 9.0 – 8.5
VULPGA code = 11010
– 8 dB – 8.5 – 8.0 – 7.5
VULPGA code = 11011
– 7 dB
VULPGA code = 00000 (default) – 6 dB
– 7.5 – 7.0 – 6.5
– 6.7 – 6.2 – 5.7
VULPGA code = 00001
VULPGA code = 00010
– 5 dB
– 4 dB
– 5.6 – 5.1 – 4.6
– 4.6 – 4.1 – 3.6
VULPGA code = 00011
– 3 dB – 3.5 – 3.0 – 2.5
VULPGA code = 00100
VULPGA code = 00101
– 2 dB
– 1 dB
– 2.4 – 1.9 – 1.4
– 1.5 – 1.0 – 0.5
PGA gain step
VULPGA code = 00110 (ref)
0 dB
0
dB
VULPGA code = 00111
VULPGA code = 01000
1 dB
2 dB
0.7 1.2 1.7
1.4 1.9 2.4
VULPGA code = 01001
VULPGA code = 01010
VULPGA code = 01011
3 dB
4 dB
5 dB
2.6 3.1 3.6
3.6 4.1 4.6
4.5 5.0 5.5
VULPGA code = 01100
VULPGA code = 10001
6 dB
7 dB
5.3 5.8 6.3
6.4 6.9 7.4
VULPGA code = 10010
8 dB
7.4 7.9 8.4
VULPGA code = 10011
VULPGA code = 10100
9 dB
10 dB
8.6 9.1 9.6
9.6 10.1 10.6
VULPGA code = 10101
11 dB
10.5 11.0 11.5
Power supply rejection,
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{0-Hz –100-kHz band}
VULPGA code = 10110
12 dB
11.5 12.0 12.5
52
dB
2–9