TCM4400EPET datasheet(17/64 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

voice downlink path (continued)

frequency response of the voiceband downlink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

100 Hz

–5.8

–5

150 Hz

–3.6

–2

200 Hz

–2.5

300 Hz

–3

–1.4

1000 Hz

Reference point

Frequency response (Gain relative to

2000 Hz

–1

–0.6

(

reference gain at 1 kHz)

3000 Hz

–1

–0.15

3400 Hz

–3

–0.35

3600 Hz

–9.0

–6

3800 Hz

–21.0

–15

4000 Hz

–32.0

–28

> 4600 Hz

–60.0

psophometric SNR vs signal level of the voiceband downlink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

–45 dBm0

–40 dBm0

–30 dBm0

Signal level

–20 dBm0

Signal level

–10 dBm0

–5 dBm0

0 dBm0

3 dBm0

Idle channel noise, 0 Hz –4 kHz

–71

dBm

Crosstalk with the uplink path

–50

gain characteristics of the voiceband downlink path

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Absolute gain error

at 0 dbm0 and 1 kHz

–1.8

0.2

Absolute gain error

at –10 dbm0 and 1 kHz

–11.8

–10

–9.8

3 dBm0

–0.25

0.25

0 dBm0

–0.25

0.25

–5 dBm0

–0.25

0.25

Gain tracking error. Over the range 3 dBm0 to – 45 dBm0 at

1 kHz with reference –10 dBm0 PGA gain = 0dB Volume

–10 dBm0

Reference level

1 kHz with reference –10 dBm0 PGA gain = 0dB. Volume

control = –12 dB

–20 dBm0

–0.25

0.25

control

12 dB

–30 dBm0

–0.25

0.25

–40 dBm0

–0.35

0.35

–45 dBm0

–0.50

0.50

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