TCM29C23_12 Datasheet, PDF (6/20 Pages) Texas Instruments – VARIABLE-FREQUENCY PCM OR DSP INTERFACE

TCM29C23, TCM129C23
VARIABLE-FREQUENCY PCM OR DSP INTERFACE
SCTS029B − AUGUST 1989 − REVISED NOVEMBER 1996
gain and dynamic range, V_CC = 5 V, V_BB = −5 V, T_A = 25°C (unless otherwise noted)
(see Notes 4, 5, and 6)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Encoder milliwatt response (transmit gain tolerance)
Signal input = 1.064 Vrms for μ-law
Signal input = 1.068 Vrms for A-law
± 0.5 ± 1 dBm0
Encoder milliwatt response (nominal supplies and temperature)
T_A = 0°C to 70°C,
Supply voltages = 5 V ± 5%
± 0.15 dB
Digital milliwatt response (receive tolerance gain) relative to
zero-transmission level point
Signal input per CCITT G.711,
Output signal = 1 kHz
± 0.5 ± 1 dBm0
Digital milliwatt response variation with temperature and supplies
T_A = 0°C to 70°C,
Supply voltages = 5 V ± 5%
± 0.15 dB
μ-law
A-law
Zero-transmission-level point, transmit channel (0 dBm0) _μ-law
A-law
R_L = 600 Ω
R_L = 900 Ω
2.76
2.79
dBm
1
1.03
Zero-transmission-level point, receive channel (0 dBm0)
μ-law
A-law
μ-law
A-law
R_L = 600 Ω
R_L = 900 Ω
5.76
5.79
dBm
4
4.03
NOTES: 4. Unless otherwise noted, the analog input is a 0-dBm0, 1020-Hz sine wave, where 0 dBm0 is defined as the zero-reference point of
the channel under test. This corresponds to an analog signal input of 1.064 Vrms or an output of 1.503 Vrms.
5. The input amplifier is set for noninverting unity gain. The digital input is a PCM bit stream generated by passing a 0-dBm0, 1020-Hz
sine wave through an ideal encoder.
6. Receive output is measured single ended in the maximum gain configuration. To set the output amplifier for maximum gain, GSR is
connected to PWRO − and the output is taken at PWRO+. All output levels are (sin x)/x corrected.
gain tracking over recommended ranges of supply voltage and operating free-air temperature,
reference level = −10 dBm0
PARAMETER
Transmit gain-tracking error, sinusoidal input
Receive gain-tracking error, sinusoidal input
TEST CONDITIONS
3 ≥ input level ≥ − 40 dBm0
−40 > input level ≥ − 50 dBm0
3 ≥ input level ≥ − 40 dBm0
−40 > input level ≥ − 50 dBm0
MIN MAX UNIT
± 0.5
± 1.5 ^dB
± 0.5
dB
± 1.5
noise over recommended ranges of supply voltage and operating free-air temperature range
PARAMETER
Transmit noise, C-message weighted
Transmit noise, psophometrically weighted
Receive noise, C-message-weighted quiet code
Receive noise, psophometrically weighted
TEST CONDITIONS
ANLG IN+ = ANLG GND,
ANLG IN − = GSX
ANLG IN+ = ANLG GND,
ANLG IN − = GSX
PCM IN = 11111111 (μ-law),
Measured at PWRO +
PCM IN = 10101010 (A-law),
PCM = lowest positive decode level
MIN MAX UNIT
18 dBrnC0
−72 dBm0p
11 dBrnC0
−79 dBm0p
6
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