Datasheet

200 mV/DIV
5 Ps/DIV
INPUT = 1 V
PP
200 mV/DIV
1 Ps/DIV
INPUT = 1 V
PP
+
-
+
-
SENSOR
C
1
1 PF
R
1
10 k:
SD
A1
A2
SD
V
+
V
-
C
2
10 PF
C
6
.01 PF
C
3
20 PF
R
3
1 k:
CABLE
R
4
1 k:
3V
R
5
10 k:
3V
C
4
1 PF
R
6
10 k:
3V
OUTPUT
C
5
10 PF
C
6
.01 PF
R
2
10 k:
V
+
V
-
LMV951
www.ti.com SNOSAI3C –OCTOBER 2006–REVISED APRIL 2013
Figure 52. Two Wire Line Driver
Figure 53. 25 kHz Through 1000 ft. Figure 54. 200 kHz Through 50 ft.
The power supply of 3V is recommended to power this system. A1 and A2 are set up as unity gain buffers. It is
easy to configure A1 with the required gain if a gain of greater than one is required. C
1
along with R
1
and R
2
are
used to ensure the correct DC operating point at the input of A1. C
4
along with R
5
and R
6
are used to setup the
correct DC operating point for A2. C
1
, C
3
, and C
4
have been selected to give about a 20% droop with a 1 kHz
square wave input.
Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 17
Product Folder Links: LMV951