STw5094A

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VOICE CODEC CHARACTERISTICS

⁄ 2 ⁄ 3 = 0dBm0, DR = -6dBm0 PCM

code, f = 1015.625 Hz; all signals are referenced to GND.

VOICE CODEC AMPLITUDE RESPONSE

Transmit path

(*) The limit at frequencies between 4600Hz and 8000Hz lies on a straight line connecting the two frequencies on a linear (dB) scale versus

log (Hz) scale.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Transmit Gain Absolute Accuracy

Transmit Gain Programmed for

minimum. Measure deviation of

Digital PCM Code from ideal

-0.5

0.5

dB

Transmit Gain Variation with

programmed gain

Measure Transmit Gain over the

range from Maximum to minimum

setting. Calculate the deviation

from the programmed gain

relative to GXA,

-0.5

0.5

dB

Transmit Gain Variation with

temperature

-0.1

0.1

dB

Transmit Gain Variation with

supply

-0.1

0.1

dB

Transmit Gain Variation with

frequency.

FS Frequency = 8kHz (VFS=0)

Digital filter characteristics

f=60 Hz

f = 100 Hz

f = 200 Hz

f = 300 Hz

f = 400 Hz to 3000 Hz

f = 3400 Hz

f = 4000 Hz

f = 4600 Hz (*)

f = 8000 Hz (*)

-1.5

-0.5

-1.5

-30

-20

-6

0.5

0.5

0.0

-14

-35

-47

dB

dB

dB

dB

dB

dB

dB

dB

dB

Transmit Gain Variation with

frequency.

FS Frequency = 16kHz (VFS=1)

Digital filter characteristics

f = 100 Hz

f = 200 Hz to 6000 Hz

f = 6800 Hz

f = 8000 Hz

f = 9200 Hz (*)

f = 16000 Hz (*)

-1.5

-0.5

-1.5

0.5

0.5

0.0

-14

-35

-47

dB

dB

dB

dB

dB

dB

Transmit Gain Variation with

signal level

Sinusoidal Test method.

Reference Level = -10 dBm0

-0.5

-0.5

-1.2

0.5

0.5

1.2

dB

dB

dB