bt8970 Mindspeed Technologies, bt8970 Datasheet - Page 90

• Manufacturer Part Number: bt8970
• Description: Single-chip Hdsl Transceiver
• Manufacturer: Mindspeed Technologies

5.0 Electrical & Mechanical Specifications
5.6 Microcomputer Interface Timing
Table 5-18. Transmitter Analog Requirements and Specifications
Figure 5-13. Transmitted Pulse Template
5-18
Transmit Symbol Rate (f
Pulse Template
Average Power
Gain Adjustment Step
Output Referred Offset Voltage
Output Current
Common-Mode Voltage
Output Impedance
Linearity
Harmonic Distortion
NOTE(S):
1. Guaranteed by design and characterization.
2. See 5-14 of the Test Conditions section of this datasheet for test circuit.
3. Measured after the transmitter is calibrated by writing the value in the Transmitter Calibration Register [tx_calibrate; 0x28] to
4. Measured with a pseudo-random code sequence of pulses.
5. FSR is Full Scale Range.
F = –0.01
the Transmitter Gain Register [tx_gain; 0x29].
A = 0.01
C = 1.00
D = 0.93
B = 1.07
Parameter
–1.2T
(1, 2, 3)
(1, 2, 4)
–0.4T
–0.6T
(1)
0.4T
qclk
0.5T
Preliminary Information/Conexant Proprietary and Confidential
)
1.25T
QCLK Frequency (Data Rate/2)
See
DC to 2xF
Controlled by Transmit Gain Register [0x29].
Seven steps above and eight steps below 0 dB.
VCOMO
DC to 1 MHz
At Output Symbol Peak
3 kHz, 3.4 V Peak Sine Wave Output, R
G = –0.16
Figure
E = 0.03
QCLK
5-13, R
, R
L
T = 1/F
L
Comments
= 135 , 0dB gain setting
= 135
Conexant
QCLK
L
= 0
200
125
13.
0.1
Mi
—
—
—
—
—
n
4
7
14T
Single-Chip HDSL Transceiver
VAA/2
0.20
0.01
Typ
–70
—
—
—
—
—
—
H = –0.05
Max
14.0
0.24
584
—
25
—
—
—
—
2
50T
F = –0.01
A = 0.01
100101B
Bt8970
%FSR
Units
dBm
100101_025
kHz
mV
mA
dB
dB
—
¾
V
(5)