TCM38C17IDL Datasheet, PDF (6/22 Pages) Texas Instruments – QComboE FOUR-CHANNEL QUAD PCM COMBO

TCM38C17IDL
QCombo™ FOUR-CHANNEL (QUAD) PCM COMBO
SLWS040C – JUNE 1996 – REVISED OCTOBER 1999
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
transmit and receive gain and dynamic range, V_DD = 5 V, T_A = 25°C (see Notes 4, 5, and 6)
PARAMETER
TEST CONDITION
MIN TYP MAX UNIT
Encoder milliwatt response (transmit gain tolerance)
Signal input = 0 dBm0
± 0.1 ± 0.18 dBm0
Encoder milliwatt response variation with temperature and
power supplies
TA = – 40°C to 85°C, Supplies = ± 5%
± 0.08 dB
Digital milliwatt response (receive tolerance gain) relative to
zero-transmission-level point
Signal input per CCITT G.711
± 0.1 ± 0.18 dBm0
Digital milliwatt response variation with temperature and power TA = – 40°C to 85°C,
supplies
Supplies = ± 5%
± 0.08 dB
Zero-transmission–level point (0 dBm0), transmit
channel
µ-law
A-law Input buffer configured for unity gain
0.747
0.75
Vrms
Transmit overload signal level, peak-to-peak centered at AREF
3 Vpp
Zero-transmission–level point (0 dBm0), receive
channel
Receive overload signal level, fully differential
µ-law
A-law
RL = 600 Ω at maximum gain
(Load is connected between
PWRO+ and PWRO –)
1.99
2
7.8
8
Vrms
Vpp
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.
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 (unity) 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.
transmit and receive 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 CONDITION
3 > input level ≥ – 40 dBm0
– 40 > input level > – 50 dBm0
– 50 ≥ input level ≥ – 55 dBm0
3 > input level ≥ – 40 dBm0
– 40 > input level > – 50dBm0
– 50 ≥ input level ≥ – 55 dBm0
MIN TYP MAX UNIT
± 0.25
± 0.5 dB
± 1.2
± 0.25
± 0.5 dB
± 1.2
noise over recommended ranges of supply voltage and operating free-air temperature
PARAMETER
TEST CONDITION
MIN TYP
Transmit noise, C-message weighted (µ-law), PCMOUT
ANLGIN+ = 0 V
10
Transmit noise, psophometrically weighted (A-law), PCMOUT
ANLGIN+ = 0 V
– 80
Receive noise, C-message-weighted quiet code at PWRO+ (µ-law) PCMIN = 11111111
5
Receive noise, psophometrically weighted at PWRO+ (A-law)
PCMIN = 11010101
– 85
MAX UNIT
12 dBrnC0
– 75 dBm0p
12 dBrnC0
– 79 dBm0p
6
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