Datasheet

AFE031
SBOS531D –AUGUST 2010–REVISED MAY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS: Transmitter (Tx) (continued)
At T
J
= +25°C, PA_V
S
= 16 V, V
AVDD
= V
DVDD
= 3.3 V, and 10 kΩ connected to PA_ISET (pin 46), unless otherwise noted.
AFE031
PARAMETER CONDITIONS MIN TYP MAX UNIT
Tx_FILTER
Input
Input voltage range GND – 0.1 AV
DD
+ 0.1 V
Input resistance
R
I
43 kΩ
(Tx_F_IN1 and Tx_F_IN2)
Frequency Response
CENELEC A Mode
Passband frequency –3 dB 95 kHz
Stop band attenuation –50 –60 dB
Stop band frequency 910 kHz
Filter gain 0 dB
CENELEC B/C/D Modes
Passband frequency –3 dB 145 kHz
Stop band attenuation –50 –60 dB
Stop band frequency 870 kHz
Filter gain 0 dB
Output
Voltage output swing from
V
O
R
LOAD
= 10 kΩ, connected to AV
DD
/2 10 100 mV
AGND or AV
DD
Sourcing 25 mA
Maximum continuous
I
O
current, dc
Sinking 25 mA
Output resistance R
O
f = 100 kHz 1 Ω
Transmitter Noise
Integrated noise at PA output
(2)
CENELEC Band A Noise-reducing capacitor = 1 nF from
435 μV
RMS
(40 kHz to 90 kHz) pin 19 to ground
CENELEC Bands B/C/D Noise-reducing capacitor = 1 nF from
460 μV
RMS
(95 kHz to 140 kHz) pin 19 to ground
(2) Includes DAC, Tx_PGA, Tx_Filter, PA, and REF1 bias generator.
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