-60
-
HD2
-62
-
HD3
-64
-
-66
-
-68
-
-70
-
-72
-
-74
-
R
ref
= 8 k©
kΩ
ref
R ref= 12 k©
kΩ
-76
-
ref
R
ref
= 24 k©
kΩ
ref
-78
-
-80
-
-82
-
-84
-
-86
-
f = 132 kHz, Gain = -2
Gain = -2,
V Tx-out=3.5 V
PP
, ,RR == 50 ©
V
Tx-out
= 3.5 V PP
L
L 50
Ω
-88
-
-90
-
-
-50
-
-25
0
25
50
75
100
T
A
- AMBIENT TEMPERATURE - ˚C
Tx-out (PIN 8) 0.5 A/DIV
Tx-en (PIN 2)
2 V/DIV
2µs/DIV
HD - HARMONIC DISTORTION - dBc
tth
2µs/DIV
Tx-out (PIN 8)
1 V/DIV
tTx-en
STATUS
(PIN 1)
2 V/DIV
tth
Figure 10. Tx-out harmonic distortion vs.
temperature for different values of R
ref
.
Figure 11. Tx enable time.
Figure 12. Tx-out load detection.
7