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
Test Conditions
Min
I
DDO
MCLK present; FSEP = 0.4 V
—
I
DD1
MCLK, FSEP present; all channels powered up
—
I
DDS
MCLK, FSEP present; all channels powered down —
Typ
0.4
33
7
Max
1
40
10
Unit
mA
mA
mA
* A nominal 6 mA decrease in current per channel put into standby.
Transmission Characteristics
Table 10. Analog Interface
Parameter
Input Resistance, VF
X
IN
Input Voltage, VF
X
IN
Load Resistance, VF
R
ON to VF
R
OP
Load Capacitance, VF
R
ON to VF
R
OP
Output Resistance, VF
R
O
Symbol
R
VF
X
I
V
IX
RL
VF
R
O
CL
VF
R
O
RO
VF
R
O
Test Conditions
1 V < |VFxI| < 4 V
Relative to ground
Differential load
—
0 dBm0, 1020 Hz PCM code
applied to D
R
Channel under test in powerdown
Alternating ±0 A-law PCM
code applied to D
R
FSEP = active, no load, channel
under test in powerdown
Alternating ±0 A-law PCM code
applied to D
R
FSEP = 0.4 V
RL = 2 kΩ (differential)
Min Typ
100
—
2.25 2.35
2
—
—
—
—
2
Max
300
2.5
—
100
20
Unit
kΩ
V
kΩ
pF
Ω
Ω
V
V
mV
µA
Vp-p
dc Output Voltage, VF
R
OP, VF
R
ON
V
OR
3000 — 10000
2.20 2.35 2.5
2.15 2.35
–60
–30
2.6
—
—
—
2.65
60
30
—
dc Output Voltage, VF
R
OP, VF
R
ON
VO
RPD
Standby
Differential dc Output
∆V
OR
VF
R
OP – VF
R
ON
Output Leakage Current, VF
R
OP,
IO
VF
R
O
VF
R
ON Powerdown
Output Voltage Swing, VF
R
OP – VF
R
ON V
SWR
16
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
