TWL1107

VOICE-BAND AUDIO PROCESSOR (VBAP

)

SLWS119 – JUNE 2001

7

POST OFFICE BOX 655303

electrical characteristics over recommended ranges of supply voltage and operating free-air temperature

(unless otherwise noted) (continued)

transmit idle channel noise and distortion, companded mode (A-law) selected

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Transmit idle channel noise, psophometrically

weighted

MIC Amp 1 configured for 23.5 dB gain

(see Note 8)

–80

–70

dBm0p

MICIN–, MICIN+ to PCMO at 3 dBm0

27

MICIN–, MICIN+ to PCMO at 0 dBm0

30

MICIN–, MICIN+ to PCMO at – 5 dBm0

33

Transmit signal-to-distortion ratio with

MICIN–, MICIN+ to PCMO at – 10 dBm0

36

dBm0

Transmit signal to distortion ratio with

1.02-kHz sine-wave input

MICIN–, MICIN+ to PCMO at – 20 dBm0

35

dBm0

MICIN–, MICIN+ to PCMO at – 30 dBm0

26

MICIN–, MICIN+ to PCMO at – 40 dBm0

24

MICIN–, MICIN+ to PCMO at – 45 dBm0

19

Intermodulation distortion, 2-tone CCITT method,

CCITT G.712 (7.1), R2

49

dB

Intermodulation distortion, 2 tone CCITT method,

composite power level, – 13 dBm0

CCITT G.712 (7.2), R2

51

dB

NOTE 8: With recommended impedances and resistor tolerance of 1%

transmit idle channel noise and distortion, linear mode selected

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Transmit idle channel noise, psophometrically

weighted

MIC Amp 1 configured for 23.5 dB gain

(see Note 8)

– 80

–74

dBm0p

MICIN–, MICIN+ to PCMO at 3 dBm0

40

55

MICIN–, MICIN+ to PCMO at 0 dBm0

50

61

MICIN–, MICIN+ to PCMO at – 5 dBm0

52

62

Transmit signal-to-total distortion ratio with 1.02-kHz

MICIN–, MICIN+ to PCMO at –10 dBm0

56

66

dB

Transmit signal to total distortion ratio with 1.02 kHz

sine-wave input

MICIN–, MICIN+ to PCMO at –20 dBm0

52

68

dB

MICIN–, MICIN+ to PCMO at – 30 dBm0

51

61

MICIN–, MICIN+ to PCMO at – 40 dBm0

43

59

MICIN–, MICIN+ to PCMO at – 45 dBm0

38

55

NOTE 8: With recommended impedances and resistor tolerance of 1%

receive gain and dynamic range, linear or companded (A-law) mode selected (see Note 9)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Load = 8

Ω, volume control = –3 dB, PCMI data input to –4 dB level

3.20

Overload-signal level (3 dB)

Load = 16

Ω, volume control = –3 dB, PCMI data input to –2 dB level

4.05

Vpp

Overload signal level (3 dB)

Load = 32

Ω, volume control = –3 dB, PCMI data input to –1 dB level

4.54

V

Absolute gain error

0 dBm0 input signal, 2.7 V

≤ VDD ≤ 3.3 V

–1

1

dB

G i

ith

t

t l

l

PCMI to EAROUT–, EAROUT+ at 3 dBm0 to – 40 dBm0

– 0.5

0.5

Gain error with output level

relative to gain at –10 dBm0

PCMI to EAROUT–, EAROUT+ at – 41 dBm0 to – 50 dBm0

–1

1

dB

relative to gain at –10 dBm0

PCMI to EAROUT–, EAROUT+ at – 51 dBm0 to – 55 dBm0

–1.2

1.2

dB

NOTE 9: 1020-Hz input signal at PCMI, output measured differentially between EAROUT– and EAROUT+