TCM4400 Datasheet, PDF (20/72 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

2.5.5 I and Q Channels Matching – Baseband Downlink Path
PARAMETER
TEST CONDITIONS MIN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Gain matching between channels}
0 Hz to 96 kHz 18-kHz sine wave
– 0.5
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Delay matching between channels 0 Hz to 96 kHz 18-kHz sine wave}
–5
TYP MAX UNIT
0.5 dB
5 ns
2.5.6 Baseband Downlink Path Global Characteristics
PARAMETER
MIN TYP MAX UNIT
Power supply rejection, 0 Hz –100 kHz band
60
dB
2.6 Timing Requirements of Baseband Downlink Path (See Figure 3–2)
MIN NOM MAX UNIT†
tsu4 Setup time, BDLON↑ to BCAL↑
tw3 Pulse duration, BCAL
tsu5 Setup time BCAL low before BENA↑
tw4 Pulse duration, BENA high
5
60
0
N effective duration of burst
controlled by BENA
N
µs
µs
µs
1/4-bit
tsu6 Setup time, BENA↑ before DATAOUT valid
th4 Hold time, DATAOUT valid after BENA↓
th5 Hold time, BDLON low after BENA low
† _{Value given is for system information only.}
24.3
28 µs
3.7 µs
0
µs
2.7 Automatic Power Control (APC)
2.7.1 APC Level (8-bit DAC)
PARAMETER
Integral nonlinearity (best fitting)
Differential nonlinearity
Settling time
TEST CONDITIONS
Shaper at maximum
full-scale load 10 kΩ, 50 pF
MIN TYP MAX UNIT
–1
1 LSB
–1
1 LSB
10 µs
2.7.2 APC Shaper (5-bit DAC)
PARAMETER
Integral nonlinearity (best fitting)
Differential nonlinearity
Settling time†
† _{Value given is for system information only.}
MIN TYP MAX UNIT
–1
1 LSB
–1
1 LSB
1 µs
2–6