11
INDUSTRIAL TEMPERATURE RANGEIDT821034 QUAD PCM CODEC WITH PROGRAMMABLE GAIN
Parameter Description Min Typ Max Units Test Conditions
VFXI Input Voltage, VFXI 2.3 2.4 2.55 V
VFRO1 Output Voltage, VFRO 2.25 2.4 2.6 V
Alternating
±
zero
µ
-law PCM code applied to DR
V
FRO2
Output Voltage Swing, VFRO 3.25 Vp-p
RL = 2000
Ω
RI Input Resistance, VFXI 2.0
M
Ω
0.25 V < VFXI < 4.75 V
RG Load Resistance, GSX 10
k
Ω
RO Output Resistance VFRO 20
Ω
0 dBm0, 1020 Hz PCM code applied to DR.
R
L
Load Resistance, VFRO 2000
Ω
External loading
II Input Leakage Current, VFXI -1.0 1.0
µ
A
0.25 V < VFXI < VDD -0.25 V
IZ Output Leakage Current, VFRO -10 10
µ
A
Power down
C
G
Load Capacitance, GSX 50 pF
C
L
Load Capacitance, VFRO 100 pF External loading
AV DC Voltage Gain, VFXI to GSX 5000
fU Unity Gain Bandwidth, VFXI to GSX 1 3 MHz
Analog Interface
TRANSMISSION CHARACTERISTICS
0 dBm0 is defined as 0.775 Vrms for A-law and 0.769 Vrms for µ-law, both for 600 W load. Unless otherwise noted, the analog input is a 0 dBm0, 1020
Hz sine wave; the input amplifier is set for unity gain. The digital input is a PCM bit stream equivalent to that obtained by passing a 0 dBm0, 1020 Hz sine
wave through an ideal encoder. The output level is sin(x)/x-corrected.
Absolute Gain
Parameter Description Typ Deviation Units Test Conditions
G
XA
Transmit Gain, Absolute 0.00
±
0.25
dB
Signal input of 0 dBm0,
µ
-law or A-law
G
RA
Receive Gain, Absolute -0.15
±
0.25
dB
Measured relative to 0 dBm0,
µ
-law or A-law,
PCM input of 0 dBm0 1020 Hz , RL = 10 k
Ω
Parameter Description Min Typ Max Units Test Conditions
GTX Transmit Gain Tracking
+3 dBm0 to - 40 dBm0
-40 dBm0 to -50 dBm0
-50 dBm0 to -55 dBm0
-0.10
-0.25
-0.50
0.10
0.50
0.50
dB
dB
dB
Tested by Sinusoidal Method,
µ
-law/A-
law
GT
R
Receive Gain Tracking
+3 dBm0 to - 40 dBm0
-40 dBm0 to -50 dBm0
-50 dBm0 to -55 dBm0
-0.10
-0.25
-0.50
0.10
0.50
0.50
dB
dB
dB
Tested by Sinusoidal Method,
µ
-law/A-
law
Gain Tracking
Parameter Description Min Typ Max Units Test Conditions
GXR Transmit Gain, Relative to GXA
f = 50 Hz
f = 60 Hz
f = 300 Hz to 3400 Hz
f = 3600 Hz
f = 4600 Hz and above
-0.15
-40
-40
0.15
-0.1
-35
dB
dB
dB
dB
dB
GRR Receive Gain, Relative to GRA
f below 300 Hz
f = 300 Hz to 3400 Hz
f = 3600 Hz
f = 4600 Hz and above
-0.15
0
0.15
-0.2
-35
dB
dB
dB
dB
Frequency Response