TP3076 Datasheet, PDF (15/18 Pages) National Semiconductor (TI) – COMBO II Programmable PCM CODEC/Filter for ISDN and Digital Phone Applications

Transmission Characteristics (Continued)
Unless otherwise noted, limits printed in BOLD characters are
+70˚C by correlation with 100% electrical testing at T_A = 25˚C.
gfu=ar1a0n1te5e.6d2f5orHVz_{C, CVF=X}+I 5=V0±_{d5B%m,0V, BDBR}=1
−5V ±5%;
= 0 dBm0
T_A =
PCM
0˚C to
code.
Transmit and receive gains programmed for maximum 0 dBm0 test levels (0 dB Gain). All other limits are assured by correla-
tion with other production tests and/or product design and characterization. All signals referenced to GND. Typicals specified
at V_CC = +5V, V_BB = −5V, T_A = 25˚C.
Symbol
Parameter
Conditions
Min Typ Max Units
AMPLITUDE RESPONSE
G_XAL
Transmit Gain
Variation with
Sinusoidal Test Method.
Reference Level = 0 dBm0
Signal Level
G_RA
Receive Gain
Absolute Accuracy
VF_XI = −40 dBm0 to +3 dBm0
VF_XI = −50 dBm0 to −40 dBm0
VF_XI = −55 dBm0 to −50 dBm0
Receive Gain Programmed for Maximum
0 dBm0 Test Level. Apply 0 dBm0
−0.2
−0.4
−1.2
−0.15
0.2
dB
0.4
dB
1.2
dB
0.15
dB
G_RAG
Receive Gain
Variation with
PCM Code to D_R1. Measure VF_R0.
T_A = 25˚C
T_A = 25˚C, V_CC = 5V, V_BB = −5V
Programmed Gain from 0 dB to 19 dB
Programmed Gain
(0 dBm0 Levels of 1.964 Vrms to 0.220 Vrms) −0.1
0.1
dB
Programmed Gain from 19.1 dB to 25.4 dB
(0 dBm0 Levels of 0.218 Vrms to 0.105 Vrms) −0.3
0.3
dB
Note: ±0.1 dB Min/Max is Available as a Selected Part
G_RAT
G_RAF
Receive Gain
Variation with
Temperature
Receive Gain
Variation with
Frequency
Measured Relative to G_RA.
V_CC = 5V, V_BB = −5V.
Minimum Gain < G_R < Maximum Gain
Relative to 1015.625 Hz, (Note 18)
D_R1 = 0 dBm0 Code.
Minimum Gain < G_R < Maximum Gain
f = 200 Hz
f = 300 Hz to 3000 Hz
f = 3400 Hz
f = 4000 Hz
G_R = 0 dB, D_R1 = 0 dBm0 Code,
G_X = 0 dB (Note 18)
f = 296.875 Hz
f = 1875.00 Hz
f = 2906.25 Hz
f = 2984.375 Hz
f = 3406.250 Hz
f = 3984.375 Hz
G_RAL
Receive Gain
Variation with
Sinusoidal Test Method.
Reference Level = 0 dBm0.
Signal Level
D_R1 = −40 dBm0 to +3 dBm0
D_R1 = −50 dBm0 to −40 dBm0
D_R1 = −55 dBm0 to −50 dBm0
DR₁ = 3.1 dBm0 −0.5
R_L = 600Ω, G_R = −0.5 dB
R_L = 300Ω, G_R = 1.2 dB
ENVELOPE DELAY DISTORTION WITH FREQUENCY
D_XA
Tx Delay, Absolute
f = 1600 Hz
−0.1
−0.25
−0.15
−0.7
−0.15
−0.15
−0.15
−0.15
−0.74
−0.2
−0.4
−1.2
−0.2
−0.2
0.1
dB
0.15
dB
0.15
dB
0.0
dB
−14
dB
0.15
dB
0.15
dB
0.15
dB
0.15
dB
0.0
dB
−13.5
dB
0.2
dB
0.4
dB
1.2
dB
0.2
dB
0.2
dB
315
µs
15
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