TCM4400E Datasheet, PDF (9/64 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
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted) (continued)
dc accuracy – baseband uplink path
PARAMETER
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Offset error before calibration}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{Offset error after calibrationâ€} 
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ †Calibration _{must be performed in normal operation mode.}
MIN TYP
±100
–7 0
MAX
7
UNIT
mV
mV
dynamic parameters – baseband uplink path
PARAMETER
TEST CONDITIONS
Absolute gain error relative to VVREF
Measured with 67.7 kHz sinewave
100 kHz
Maximum output random modulation spectrum relative to in-band
average level. Measured by average FFTs of random bursts using
a window with 30 kHz bandwidth.
200 kHz
250 kHz
400 kHz
600 KHz
MIN TYP MAX UNIT
–1.5
0 1.5 dB
–3 dB
–34 dB
–37 dB
–65 dB
–72 dB
800 KHz
–72 dB
smoothing filters characteristics – baseband uplink path
PARAMETER
TEST CONDITIONS
Group delay
0 Hz to 100 kHz
MIN TYP MAX UNIT
1.5
µs
I and Q channels gain matching – baseband uplink path
PARAMETER
Gain matching between channels
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{I and Q gain unbalance}
TEST CONDITIONS
0 Hz to 96 kHz Measured on 67.7 kHZ sinewave
Programmable with bits IQSEL, G1, and G0
MIN
–1
–0.42
TYP
0
–0.27
MAX
1
–0.12
–0.68 –0.53 –0.38
–0.93 –0.78 –0.63
UNIT
dB
dB
baseband uplink path global characteristics
PARAMETER
MIN TYP MAX UNIT
GMSK phase trajectory error‡
6° peak
1.5° rms
Power supply rejection
‡ _{After software calibration through BBAloop}
55
dB
timing requirements of baseband uplink path
programmable delays – baseband uplink path (see Figure 1)
MIN NOM MAX UNIT^§
tsu1 Setup time, BENA before APC↑
Bits DELU of register BULRUDEL
0
15 1/4-bit
th1 Hold time, ramp-down from BENA low
Bits DELD of register BULRUDEL
0
15 1/4-bit
tr, tf Transition time, APC
Bit APCSPD = 0
Bit APCSPD = 1
1/16-bit
0
64
1/8-bit
§ _{Bit is relative to GSM bit = 1/270 kHz. Units can be a fractional part of the GSM bit as noted. Values in the above table are given for system}
information only.
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