TCM4400EPET datasheet(11/64 Pages) TI

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TCM4400E

GSM/DCS BASEBAND AND VOICE A/D

AND D/A RF INTERFACE CIRCUIT

SLWS082A – JULY 1999 – REVISED MARCH 2000

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

channel characteristics (continued)

SNR vs signal level–baseband downlink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

–50 dBm0

200 kHz bandwidth

–40 dBm0

–30 dBm0

Signal level

–20 dBm0

–10 dBm0

–5 dBm0

0 dBm0

Idle channel noise, 0 Hz –200 kHz

–66

dBm0

gain characteristics of the baseband downlink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Absolute gain error relative to VVREF

at –10 dBm0 and 18 kHz

–11

–10

–9

0 dBm0

–0.25

0.25

–5 dBm0

–0.25

0.25

Gain tracking error Over the range 3 dBm0 to

50 dBm0 at

–10 dBm0

Reference level

Gain tracking error. Over the range 3 dBm0 to – 50 dBm0 at

18 kHz with reference –10 dBm0

–20 dBm0

–0.25

0.25

18 kHz with reference 10 dBm0

–30 dBm0

–0.25

0.25

–40 dBm0

–0.25

0.25

–50 dBm0

–0.50

0.50

group delay – baseband downlink path

PARAMETER

MIN

TYP

MAX

UNIT

Group delay

0 Hz to 100 kHz

µs

I and Q channels matching – baseband downlink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Gain matching between channels

0 Hz to 96 kHz

18 kHz sinewave

–0.5

0.5

Delay matching between channels

0 Hz to 96 kHz

18 kHz sinewave

–8

baseband downlink path global characteristics

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Power supply rejection, 0 Hz –100 kHz band

timing requirements of baseband downlink path (see Figure 2)

MIN

NOM

MAX

UNIT†

tsu4

Setup time, BDLON

↑ to BCAL↑

µs

tw3

Pulse duration, BCAL

µs

tsu5

Setup time BCAL low before BENA

↑

µs

tw4

Pulse duration, BENA high

N effective duration of burst controlled by BENA

1/4-bit

tsu6

Setup time, BENA

↑ before DATAOUT VALID

24.3

µs

th4

Hold time, DATAOUT VALID after BENA

↓

3.7

µs

th5

Hold time, BDLON low after BENA low

µs

† Values in the above table are given for system information only.

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