
TLFD600
ADSL CODEC WITH INTEGRATED LINE DRIVER AND RECEIVER
SLAS280B
–
MAY 2000
–
REVISED NOVEMBER 2000
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics, T
A
= 25
°
C, analog power supplies = 3.3 V, digital power supplies = 3.3 V,
AVDD_DRIVER = 12 V, f
CLKIN
= 35.328 MHz (unless otherwise noted) (continued)
TX channel (TX line driver is not included)
PARAMETER
TEST CONDITIONS
FMR [D4] = 0
MIN
133
TYP
138
MAX
143
UNIT
Low pass filter
Low-pass filter
kHz
Signal bandwidth
FMR [D4] = 1
121
125
129
High-pass filter
25.875
kHz
MTPR
1. 4.3125kHz spaced tones from 25.875 to 138 kHz
2. 81.9375 kHz tone is missing
70
dB
Group delay distortion
10
μ
s
dB
PAA gain step error
–
0.5
0.5
PSRR
See Note 2
–
70
dB
Out-of-band noise
NOTES:
See Note 3
–
150
dBm/Hz
2. Inject single tone signal (267.375 kHz) at 200 mVp-p to analog power supplies and measure 267.375 kHz tones at RX output.
3. Send multitone signal (25.875 to 138 kHz at 4.3125 kHz/step) at full scale output level and measure signal level beyond 276 kHz
at TXOUTP/M.
TX driver (AVDD_DRIVER = 12 V)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Output voltage swing
Input signal is 138 kHz @ 3 VP-P differential at
DRIVERINP/M, RL
= 50
18.2
VP-P
Output current
220
Output short circuit
protection current limit
300
mA
TSNR
Input 3 VP-P differential @ 138 kHz at DRIVERINP/M
Input impedance
85
dB
DRIVERINP/M
600
VCXO DAC
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Resolution
12
±
1
±
4
Bits
DNL
Differential nonlinearity
LSB
INL
Integral nonlinearity
LSB
Monotonicity
12
Bits
Offset error
–
100
100
mV
Output compliance voltage
Maximum code input with load = 50 k
3
V
k
Output load
50
power dissipation
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analog (TX line driver is not included)
All AVDD = 3.3 V
620
695
mW
Digital
All DVDD = 3.3 V
150
165
mW
Fully operational without TX line driver
770
860
mW
TX Driver
Quiescent, AVDD_DRIVER = 12 V
–
47 dBm/Hz DMT signal (PAR = 17 dB) on 50
-
load,
(AVDD_DRIVER = 12 V)
510
570
mW
TX Driver
610
690
mW
Fully operational with driver
1380
1530
mW
H/W power down
160
250
mW