Datasheet

9
LT1078/LT1079
10789fe
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
TEMPERATURE (°C)
–50
COMMON MODE RANGE (V)
–25 0 25 50 75
LT1078/79 • TPC22
125
V
+
V
+
– 1
V
+
– 2
V
–
+ 1
V
–
V
–
– 1
100
V
+
= 2.5V TO 18V
V
–
= 0V TO –18V
Output Saturation vs Temperature
vs Sink Current
TEMPERATURE (°C)
–50
SATURATION VOLTAGE (mV)
1000
100
10
1
–25 125
LT1078/79 • TPC19
0 25 50 10075
I
SINK
= 2mA
I
SINK
= 1mA
I
SINK
= 100µA
I
SINK
= 1µA
NO LOAD
R
L
= 5k TO GND
I
SINK
= 10µA
V
S
= 5V, 0V
Common Mode Range
vs Temperature Closed Loop Output Impedance
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
1k
100
10
1
0.1
LT1078/79 • TPC24
10 100 1k 10k 100k
A
V
= 100
A
V
= 10
A
V
= 1
Output Voltage Swing
vs Load Current
SOURCING OR SINKING LOAD CURRENT (mA)
0.01
OUTPUT VOLTAGE SWING (V)
V
+
V
+
– 1
V
+
– 2
V
–
+ 2
V
–
+ 1
V
–
10
LT1078/79 • TPC20
0.1 1
125°C
25°C
–55°C
125°C
–55°C
25°C
Undistorted Output Swing
vs Frequency
FREQUENCY (kHz)
0.01
PEAK-TO-PEAK OUTPUT SWING, V
S
= ±15V (V)
PEAK-TO-PEAK OUTPUT SWING, V
S
= 5V, 0V (V)
30
20
10
0
5
4
3
2
1
0
100
LT1078/79 • TPC23
110
V
S
= 5V, 0V
R
L
≥ 100k
V
S
= ±15V
R
L
≥ 100k
V
S
= ±15V
R
L
= 30k
V
S
= 5V, 0V
R
L
≥ 1k
T
A
= 25°C
LOAD R
L
,
TO GND
Distribution of Input Offset Voltage
(LT1078 in 8-Pin SO Package)
Channel Separation vs Frequency
Power Supply Rejection Ratio
vs Frequency
Common Mode Rejection Ratio
vs Frequency
FREQUENCY (Hz)
10
COMMON MODE REJECTION RATIO (dB)
100 1k 10k 100k
LT1078/79 • TPC25
1M
T
A
= 25°C
120
100
80
60
40
20
0
V
S
= ±15V
V
S
= 5V, 0V
FREQUENCY (Hz)
0.1
POWER SUPPLY REJECTION RATIO (dB)
120
100
80
60
40
20
0
100 10k
LT1078/79 • TPC26
110
1k 100k 1M
T
A
= 25°C
V
S
= ±2.5V + 1V
P-P
SINE WAVE
POSITIVE
SUPPLY
NEGATIVE
SUPPLY
FREQUENCY (Hz)
1 1k 100k
LT1078/79 • TPC27
10 100
10k 1M
CHANNEL SEPARATION (dB)
140
120
100
80
60
40
20
0
T
A
= 25°C
V
S
= ±2.5V
V
IN
= 3V
P-P
TO 2kHz
R
L
= 10k
INPUT OFFSET VOLTAGE (µV)
–160
PERCENT OF UNITS
160
LT1078/79 • TPC21
–80
0
80
16
14
12
10
8
6
4
2
0
–120
–40
40
120
T
A
= 25°C
V
S
= 5V, 0V