APPLICATIONS INFORMATION
The DRV134 (and DRV135 in SO-8 package) converts a
single-ended, ground-referenced input to a floating differ-
ential output with +6dB gain (G = 2). Figure 1 shows the
basic connections required for operation. Decoupling ca-
pacitors placed close to the device pins are strongly recom-
mended in applications with noisy or high impedance power
supplies.
The DRV134 consists of an input inverter driving a cross-
coupled differential output stage with 50Ω series output
resistors. Characterized by low differential-mode output
impedance (50Ω) and high common-mode output imped-
ance (1.6kΩ), the DRV134 is ideal for audio applications.
Normally, +V
O
is connected to +Sense, –V
O
is connected to
–Sense, and the outputs are taken from these junctions as
shown in Figure 1. For applications with large dc cable
offset errors, a 10µF electrolytic nonpolarized blocking
capacitor at each sense pin is recommended as shown in
Figure 2.
V–
1µF
V+
1µF
5
(11)
6 (12)
DRV134
DRV135
50Ω
A2
8
(14)
7
(13)
10kΩ
V
IN
4
(6)
2
3
(5)
A1
A3
50Ω
(4)
1
(3)
G = +6dB
–Sense
+Sense
+V
O
Gnd
–V
O
10kΩ
All resistors 30kΩ unless otherwise indicated.
SOL-16 pin numbers in parentheses.
FIGURE 1. Basic Connections.
DRIVER
DRV134
DRV135
50Ω
A2
8
10µF
(1)
+V
O
RECEIVER
BALANCED
CABLE PAIR
–V
O
2
5
7
10kΩ
V
IN
4
6
10µF
(1)
–V
O
3
+V
O
INA134, INA137
1
V
O
2
3
A1
A3
50Ω
1
Gnd
10kΩ
All resistors 30kΩ unless otherwise indicated.
INA134 (G = 1): V
O
= 2V
IN
INA137 (G = 1/2): V
O
= V
IN
Pin numbers shown for DIP and SO-8 versions.
NOTE: (1) Optional 10µF electrolytic (nonpolarized) capacitors reduce common-mode offset errors.
FIGURE 2. Complete Audio Driver/Receiver Circuit.
®
DRV134, 135
8
BURR-BROWN [ BURR-BROWN CORPORATION ]
