T7507 Quad PCM Codec with Filters,
Termination Impedance, and Hybrid Balance
Data Sheet
August 1999
Electrical Characteristics (continued)
dc Characteristics (continued)
Table 9. Power Dissipation
Power measurements are made with outputs unloaded.
Parameter
Powerdown Current
Powerup Current*
Standby Current
Symbol
IDDO
Test Conditions
Min Typ Max
Unit
mA
mA
mA
MCLK present; FSEP = 0.4 V
—
—
—
0.4
33
7
1
IDD1
MCLK, FSEP present; all channels powered up
MCLK, FSEP present; all channels powered down
40
10
IDDS
* A nominal 6 mA decrease in current per channel put into standby.
Transmission Characteristics
Table 10. Analog Interface
Parameter
Symbol
RVFXI
Test Conditions
1 V < |VFxI| < 4 V
Relative to ground
Differential load
—
Min Typ Max Unit
Input Resistance, VFXIN
100
—
300
kΩ
V
Input Voltage, VFXIN
VIX
2.25 2.35 2.5
Load Resistance, VFRON to VFROP
Load Capacitance, VFRON to VFROP
Output Resistance, VFRO
RLVFRO
CLVFRO
ROVFRO
2
—
—
2
—
100
20
kΩ
pF
Ω
—
—
0 dBm0, 1020 Hz PCM code
applied to DR
Channel under test in powerdown 3000
—
10000
Ω
dc Output Voltage, VFROP, VFRON
VOR
Alternating ±0 A-law PCM
code applied to DR
2.20 2.35 2.5
V
dc Output Voltage, VFROP, VFRON
Standby
VORPD
∆VOR
FSEP = active, no load, channel 2.15 2.35 2.65
under test in powerdown
V
Differential dc Output
VFROP – VFRON
Alternating ±0 A-law PCM code
applied to DR
–60
–30
2.6
—
—
—
60
30
—
mV
µA
Output Leakage Current, VFROP,
VFRON Powerdown
IOVFRO
FSEP = 0.4 V
Output Voltage Swing, VFROP – VFRON VSWR
RL = 2 kΩ (differential)
Vp-p
16
Lucent Technologies Inc.
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