Datasheet

DS_1903_032 73M1903 Data Sheet
Rev. 2.1 31
8.5.2 Transmitter
Table 18: Transmitter Performance Specifications
Parameter Test Condition Min Nom Max Units
DAC gain
(Transmit Path Gain)
Code word of ± 32,767 @1 kHz;
TXBST0=0; TXBST1=0
70
µv/bit
DC offset –Differential
Mode
Across TXAP and TXAN for
DAC input = 0 -100 100 mV
DC offset -Common
Mode
Average of TXAP and TXAN for DAC
input = 0; relative to VREF -80 80 mV
TXBST0 Gain
Code word of ± 32,767 @1 kHz;
relative to TXBST0=0; TXBST1=0 1.65 dB
TXBST1 Gain
Code word of ± 32,767 @1 kHz;
relative to TXBST0=0; TXBST1=0
1.335 dB
Total Harmonic
Distortion (THD)
Code word of ± 32,767 @1 kHz; relative
to TXBST0=0;TXBST1=0 THD = 2
nd
and
3
rd
harmonic.
-75 -85 dB
Code word of ± ( 32,767*0.8) @1 kHz;
relative to TXBST0=0;TXBST1=0 THD =
2
nd
and 3
rd
harmonic.
-80 -85 dB
1200 Ω Resistor
across TNAN/TXAP
Code word of ± ( 32,767*0.9) @1 kHz;
relative to TXBST0=1;TXBST1=1 THD =
2
nd
and 3
rd
harmonic.
-60 -70 dB
Code word of ± 32,767 @1 kHz;
relative to TXBST0=1;TXBST1=1
THD = 2
nd
and 3
rd
harmonic
-70
Intermod Distortion
At output (TXAP-TXAN): DTMF
1.0 kHz, 1.2 kHz sine waves, summed
2.0 V
pk
(-2 dBm tone summed with
0 dBm tone)
Refer to TBR 21 specifications for
description of complete requirements.
70
dB
below
low
tone
Idle Channel Noise 200 Hz - 4.0 kHz 110 μV
PSRR
-30 dBm signal at VPA
300 Hz – 30kHz
40 dB
Passband Ripple 300 Hz - 3.2kHz -0.125 0.125 dB
Transmit Gain
Flatness
Code word of ± 32,767 @1 kHz.
Measure gain at 0.5 kHz, and 2 kHz
relative to 1 kHz.
Gain at 0.5 kHz
Gain at 1 kHz (Normalized)
Gain at 2.0 kHz
Gain at 3.3 kHz
0.17
0
0.193
-0.12
dB
dB
dB
dB