ST70136B STMICROELECTRONICS [STMicroelectronics], ST70136B Datasheet - Page 15

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

5.3 - Receive 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 9 : Receive Path Specifications
Notes: a. The corresponding typical value correspond to a 2.4Vpd at RXN/RXP differentiel inputs. The 2.4Vpd correspond to what will be
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
Output word rate
Output word resolution 16 bits
Reference Input signal
Common mode voltage
Differential Input impedance
Input noise
Gain, 0
Step size 1dB
Step size
Attenuator 0 >= Att >= -3
Step size 4dB
Att step size
AAF cutoff frequency
Output SDR
2 tones
called 0dBr for the other specifications in the present table. Variations include process, temperature and power variations.
b. The input noise must be measured in the frequency domain from 138KHz to 1.1MHz, with an sinusoidal input signal at -60dBr
amplitude. Frequency of the input signal is 552KHz.
c. D is the gain relatively to the 0dBr previously defined. Variations include process, temperature and power variations.
d. Monotonicity is guaranted for RxPGA, Attenuator, but separatly.
e. Ratio between max peak amplitude of one of the 2 single tones to any spurious measured in the down-stream band
[138KHz-1.1MHz] ; each tone amplitude is at -6-31=-37dBr. The couples are (f1,f2) = (200KHz, 300KHz), (400KHz, 500KHz),
(600KHz, 700KHz).
Description
D
31
a
b
c
d
e
4*Att-0.5
D-0.5
Min.
-0.8
2.4
0.8
3.5
12
66
1
8.832
4*Att
Typ.
-0.4
2.5
1.4
20
D
1
4
ambient
4*Att+0.5
D+0.5
Max.
< 70°C, and worst case process and bias current.
2.6
1.2
4.5
16
28
15
0
2
MHz
dBfs
----------- -
MHz
Unit
dBc
bits
nV
k
dB
dB
dB
dB
V
Hz
Data Sampling frequency
Fref=138KHz, PGA gain=0dB, Vin = 0dBr
(2.4Vpd)
Measured on each single input
Between RXN and RXP
@gain=+31dB, frequency>138KHz
Receive Programmable gain. D is the
binary value of the control word. (see
Section 4.7.1.1 - Rx Gain Control on
page 10
Receive attenuator ATT is the binary
value of the control word. (see Section
4.7.1.1 - Rx Gain Control on page 10
-3dB corner vs low frequency
For RxPGA gain=31dB, measured at
output of ADC.
Comments
ST70136
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