Datasheet

AFE031
www.ti.com SBOS531D –AUGUST 2010–REVISED MAY 2012
ELECTRICAL CHARACTERISTICS: Transmitter (Tx)
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_DAC
Output range GND + 0.1 AV
DD
– 0.1 V
Resolution 1,024 steps, 10-bit DAC 3.2 mV
Total harmonic distortion at
THD
62.5 kHz
(1)
Second harmonic distortion –73 dB
Third harmonic distortion –56 dB
Fourth harmonic distortion –94 dB
Data rate 1.5 MSPS
Tx_PGA
Input
Input voltage range GND – 0.1 AV
DD
+ 0.1 V
G = 1 V/V 58 kΩ
G = 0.707 V/V 68 kΩ
Input resistance R
I
G = 0.5 V/V 77 kΩ
G = 0.25 V/V 92 kΩ
Frequency Response
DAC mode enabled
G = 1 V/V 8 MHz
Bandwidth BW G = 0.707 V/V 9 MHz
G = 0.5 V/V 10 MHz
G = 0.25 V/V 12 MHz
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
Gain
Gain error For all gains –1 ±0.1 +1 %
Gain error drift T
J
= –40°C to +125°C 6 ppm/°C
(1) Total harmonic distortion measured at output of Tx_PGA configured in a gain of 1 V/V with an amplitude of 3 V
PP
, at a 1-MHz sample
rate.
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