ST70136B STMICROELECTRONICS [STMicroelectronics], ST70136B Datasheet - Page 16

• Manufacturer Part Number: ST70136B
• Description: CPE ADSL ANALOG FRONT END
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST70136
5.4 - Transmit Path Specifications
TA = 0 to 70°C unless otherwise specified. The following specifications are guaranteed only when the
Digital Control Interface is not active.
Table 10 : Transmit Path Specifications
Notes: a. This will represents the 0dBr for the other specifications in the present table. The level is mesured for the frequency of 30KHz
16/24
Typical specifications apply for VCC = 5.0V, temperature = 27°C, nominal process and bias current. Maximum and
minimum performance is with VCC ±5%, 0°C < T
Input word rate
Input word resolution
PGAP/PGAN OUTPUT
Common mode voltage
Load resistance
Load capacitance
Output Impedance
Reference Output signal
Output noise
Cutoff frequency
Gain,0
step size 1dB
Step size
TXP/TXN OUTPUT
Common mode voltage
Load resistance
Load capacitance
Output Impedance
Output SDR
2 tones ADSL/POTS
2 tones ADSL/ISDN
which will correspond to the reference frequency. Variations include process, temperature and power variations.
b. This gain is given relatively to the 0dBr previously defined. Variations include process, temperature and power variations.
c. Ratio between max peak amplitude of one of the 2 single tones to any spurious. Measure performed for a dual tone signal (each
tone with an amplitude equal to -6dBr), in range 30KHz to 1MHz (couple (f1,f2) are (70KHz, 80KHz), (120KHz, 130KHz)).
d. Ration between max peak amplitude of one of the 2 single tones to any spurious. Measure performed for a (250KHz, 260KHz) dual
tone signal (each tone with an amplitude equal to -6dBr), in range 30KHz to 1MHz.
Description
D
15
a
b
c
d
-D-0.5
Min.
-5%
500
500
0.8
2.4
2.4
79
71
8.832
Typ.
2.5
2.4
2.5
-D
1
4
1
1
ambient
-D+0.5
Max.
+5%
2.6
1.2
2.6
< 70°C, and worst case process and bias current.
16
10
45
10
5
5
MHz
MHz
Unit
----------- -
bits
pF
Vp
nV
dB
dB
pF
dB
V
V
Hz
Measured on each output
Single ended
Single ended
Single ended
Differential output @0dB gain for TxPGA
See also mask diagram below ("Final
PGAP/N noise mask")
@-3dB
Programmable attenuator.
Measured on each output
Single ended
Single ended
Single ended
For TxPGA gain = 0dB
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