TCM320AC36, TCM320AC37

VOICE-BAND AUDIO PROCESSORS (VBAP

™)

SLWS003C – MAY 1992 – REVISED APRIL – 1998

8

POST OFFICE BOX 655303

transmit idle channel noise and distortion, linear mode selected, over recommended ranges of supply

voltage and operating free-air temperature (see Notes 6 and 8)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Transmit noise, C-message weighted

MICIN connected to MICGS through a 10-k

Ω resistor

200

µVrms

MICIN to DOUT at – 6 dBm0

50

MICIN to DOUT at – 12 dBm0

48

Transmit signal-to-distortion ratio with sine-wave input

MICIN to DOUT at – 18 dBm0

40

dB

Transmit signal-to-distortion ratio with sine-wave in ut

MICIN to DOUT at – 24 dBm0

35

dB

MICIN to DOUT at – 40 dBm0

20

MICIN to DOUT at – 45 dBm0

18

NOTES:

6. The input amplifier is set for inverting unity gain.

8. Transmit noise, linear mode: 200

µVrms is equivalent to –74 dB (referenced to device 0-dB level).

receive gain and dynamic range, companded mode (

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Companded mode selected,

µ-law (’AC36)

0.736

Receive reference-signal level (0 dB) (see Note 11)

Companded mode selected, A-law (’AC37)

0.739

Vrms

Linear mode selected (’AC36 and ’AC37)

0.751

Companded mode selected,

µ-law (’AC36)

3

Overload-signal level

Companded mode selected, A-law (’AC37)

3

Vpp

Linear mode selected (’AC36 and ’AC37)

3

Absolute gain error

0-dB input signal

±1

dB

DIN to EARA and EARB at 3 dBm0 to – 36 dBm0

±0.5

Gain error with output level relative to gain at –10 dBm0

DIN to EARA and EARB at – 37 dBm0 to – 40 dBm0

±1

dB

Gain error with out ut level relative to gain at –10 dBm0

DIN to EARA and EARB at – 41 dBm0 to – 50 dBm0

±1.5

dB

DIN to EARA and EARB at – 51 dBm0 to – 55 dBm0

±2

Gain variation

VCC ±10%,

TA = 0°C to 70°C

±0.5

dB

NOTES:

9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS

is connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.

10. Unless otherwise noted, the digital input is a word stream generated by passing a 0-dB sine wave at 1020 Hz through an ideal

encoder, where 0 dB is defined as the zero reference.

11. This reference-signal level is measured at the speaker output of the receive channel with the gain of the output speaker amplifier

set to unity.

receive filter transfer, companded mode (

µ-law or A-law) or linear mode selected, over recommended ranges

of supply voltage and operating free-air temperature, FSR = 8 kHz (see Note 9)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

fDIN = < 200 Hz

0.15

fDIN = 200 Hz

– 0.5

0.15

fDIN = 300 Hz to 3 kHz

±0.15

Gain relative to gain at 1.02 kHz

DIN = 0 dBm0

fDIN = 3.3 kHz

– 0.35

0.03

dB

fDIN = 3.4 kHz

–1

– 0.18

fDIN = 4 kHz

–14

fDIN = > 4.6 kHz

–30

NOTE 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS is

connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.