TCM4400E Datasheet, PDF (11/64 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

TCM4400E
GSM/DCS BASEBAND AND VOICE A/D
AND D/A RF INTERFACE CIRCUIT
SLWS082A – JULY 1999 – REVISED MARCH 2000
channel characteristics (continued)
SNR vs signal level–baseband downlink path
PARAMETER
Signal level
Idle channel noise, 0 Hz –200 kHz
–50 dBm0
–40 dBm0
–30 dBm0
–20 dBm0
–10 dBm0
–5 dBm0
0 dBm0
TEST CONDITIONS
200 kHz bandwidth
MIN TYP MAX UNIT
21
26
36
46
dB
50
55
30
–66 dBm0
gain characteristics of the baseband downlink path
PARAMETER
Absolute gain error relative to VVREF
0 dBm0
–5 dBm0
Gain tracking error. Over the range 3 dBm0 to – 50 dBm0 at
18 kHz with reference –10 dBm0
–10 dBm0
–20 dBm0
–30 dBm0
–40 dBm0
–50 dBm0
TEST CONDITIONS
at –10 dBm0 and 18 kHz
Reference level
MIN
–11
–0.25
–0.25
–0.25
–0.25
–0.25
–0.50
TYP MAX UNIT
–10
–9 dB
0.25
0.25
0
dB
0.25
0.25
0.25
0.50 dB
group delay – baseband downlink path
PARAMETER
Group delay
0 Hz to 100 kHz
MIN TYP MAX UNIT
28
µs
I and Q channels matching – baseband downlink path
PARAMETER
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Gain matching between channels}
0 Hz to 96 kHz
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Delay matching between channels}
0 Hz to 96 kHz
TEST CONDITIONS
18 kHz sinewave
18 kHz sinewave
MIN TYP MAX UNIT
–0.5
0.5 dB
–8
8 ns
baseband downlink path global characteristics
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Power supply rejection, 0 Hz –100 kHz band
70
dB
timing requirements of baseband downlink path (see Figure 2)
tsu4
Setup time, BDLON↑ to BCAL↑
tw3
Pulse duration, BCAL
tsu5
Setup time BCAL low before BENA↑
tw4
Pulse duration, BENA high
N effective duration of burst controlled by BENA
tsu6
Setup time, BENA↑ before DATAOUT VALID
th4
Hold time, DATAOUT VALID after BENA↓
th5
Hold time, BDLON low after BENA low
† _{Values in the above table are given for system information only.}
MIN NOM MAX UNIT†
5
µs
60
µs
0
µs
N
1/4-bit
24.3
28 µs
3.7 µs
0
µs
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