PA162
Product Innovation From
TYPICAL PERFORMANCE GRAPHS
OS
CASE TEMPERATURE, T
C
(°C)
20
16
12
8
4
0
120
80
40
0
-40
AVERAGE BIAS CURRENT, I
B
(mA)
75
(V)
(mV)
QUIESCENT CURRENT
BIAS CURRENT
VOS
3
S
65
AVERAGE OFFSET VOLTAGE, V
TOTAL SUPPLY VOLTAGE, V
2
55
1
-80
2
10
8
4
6
AVERAGE QUIESCENT CURRENT, I
Q
(mA)
45
0
40
120
-40
80
CASE TEMPERATURE, T
C
(°C)
0
0
40
80
120
-40
CASE TEMPERATURE, T
C
(°C)
PHASE MARGIN vs. OUTPUT LOAD CAPACITANCE
65
VOLTAGE GAIN & PHASE vs. FREQUENCY
VOLTAGE DROP FROM SUPPLY, (V)
60
90
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
OUTPUT VOLTAGE SWING
PHASE MARGIN, Ф (°)
45
20
110
35
0
120
PHASE, Ф (°)
GAIN, A (dB)
55
40
100
25
20
04
08
12
16
00
OUTPUT LOAD CAPACITANCE, C
L
(nF)
10
8
-20
1
100
1K
10
FREQUENCY, ƒ (KHz)
130
10K
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT CURRENT, I
O
(A)
PULSE RESPONSE
+V
S
= +15V
A
V
= +1
V
IN
= 10Vp
10
8
PULSE RESPONSE
+V
S
= +15V
A
V
= +1
V
IN
= 10Vp
(V)
6
4
2
0
-2
-4
-6
-8
-10
0
-V
S
= -15V
R
L
= 20
f
IN
= 20kHz
(V)
O
6
4
2
0
-2
-4
-6
-8
-10
0
-V
S
= -15V
f
IN
= 1kHz
OUTPUT VOLTAGE, V
O
10
20
30 40 50
TIME, t (µs)
60
OUTPUT VOLTAGE, V
70
200 400 600 800 1000 1200 1400
TIME, t (µs)
R2
R3
R4
R1
_
_
B
1/4 PA162
+
R6
+28V
TYPICAL APPLICATION
R1 and R2 set up Amplifier A as non-inverting. Ampli-
fier B is set up as a unity gain inverter driven from the
output of Amplifier A. Note that Amplifier B inverts the
signals about the reference node, which is set at mid-
supply by R5 and R6. When the command input is
midrange, so is the output of Amplifier A. Since this is
also equivalent to the reference node voltage, the out-
put of Amplifier B is the same resulting in 0V across
the motor. Inputs more positive than 5V result in motor
current flow from left to right (see Figure 3). Inputs less
than 5V drive the motor in the opposite direction.
4
INPUT
0-10V
A
1/4 PA162
+
M
R5
FIGURE 3. BI-DIRECTIONAL SPEED CONTROL
FROM A SINGLE SUPPLY.
PA162U
APEX [ CIRRUS LOGIC ]
