87
4.0 Electrical & Mechanical Specifications
4.6 Microcomputer Interface Timing
Bt8960
Single-Chip 2B1Q Transceiver
N8960DSB
Table 4-18. Transmitter Analog Requirements and Specifications
Parameter Comments Min Typ Max Units
Transmit Symbol Rate (f
qclk
) QCLK Frequency (Data Rate/2) 75 210 kHz
Pulse Template
(1, 2,3)
See Figure 4-13, R
L
= 135 Ω
Average Power
(1, 2,4)
DC to 2xF
QCLK
, R
L
= 135 Ω, 0dB gain
setting
13.4 14.0 dBm
Gain Adjustment Step Controlled by Transmit Gain Register
[0x29]. Seven steps above and eight
steps below 0 dB.
0.17 0.20 0.24 dB
Output Referred Offset Voltage 25 mV
Output Current 125 mA
Common-Mode Voltage VCOMO VAA/2 V
Output Impedance
(1)
DC to 1 MHz 2 W
Linearity At Output Symbol Peak 0.01
%FSR
(5)
Harmonic Distortion 3 kHz, 3.4 V Peak Sine Wave Output, R
L
= 0 Ω
–70 dB
Notes: (1). Guaranteed by design and characterization.
(2). See 4-14 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 the Transmitter Gain Register [tx_gain; 0x29].
(4). Measured with a pseudo-random code sequence of pulses.
(5). FSR is Full Scale Range.
