Datasheet

10
LT1218/LT1219
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
LT1218 Power Supply Rejection
Ratio vs Frequency
LT1218 Closed Loop Output
Impedance vs Frequency
LT1219 Closed Loop Output
Impedance vs Frequency
FREQUENCY (kHz)
1
POWER SUPPLY REJECTION RATIO (dB)
100
90
80
70
60
50
40
30
20
10
0
10 100 1000
LT1218/19 • TPC17
V
S
= ±2.5V
POSITIVE SUPPLY
NEGATIVE SUPPLY
FREQUENCY (kHz)
0.1
0.1
OUTPUT IMPEDANCE (Ω)
10
1000


1 10 100 1000
LT1218/19 • TPC18
1.0
100
A
V
= 10
A
V
= 1
V
S
= ±2.5V
FREQUENCY (kHz)
0.1
0.1
OUTPUT IMPEDANCE (Ω)
10
1000


1 10 100 1000
LT1218/19 • TPC19
1.0
100
V
S
= ±2.5V
C
L
= 0.1µF
A
V
= 10
A
V
= 1
LT1218 Capacitive Load Handling
LT1219 Overshoot vs Load
Current, V
S
= ±2.5V
LT1219 Overshoot vs Load
Current, V
S
= ±15V
LOAD CURRENT (mA)
–10
OVERSHOOT (%)
5
LT1218/19 • TPC21
–5 0 10
70
60
50
40
30
20
10
0
C
L
= 0.22µF
C
L
= 0.1µF
C
L
= 0.047µF
V
S
= ±2.5V
A
V
= 1
CAPACITIVE LOAD (pF)
OVERSHOOT (%)
80
70
60
50
40
30
20
10
0
10 1000 10000 100000
LT1218/19 • TPC20
100
A
V
= 1
A
V
= 5
A
V
= 10
V
S
= ±2.5V
Open-Loop Gain, V
S
= ±15V
THD + Noise vs Frequency
OUTPUT VOLTAGE (V)
–20
OFFSET VOLTAGE CHANGE (µV)
20
LT1218/19 • TPC23
–10
0
10
40
30
20
10
0
–10
–20
–30
–40
–15
–5
5
15
R
L
= 10k
R
L
= 2k
V
S
= ±15V
FREQUENCY (kHz)
0.01
0.001
THD + NOISE (%)
0.01
0.1
1
0.1 1 10
LT1218/19 • TPC25
V
S
= ±1.5V
V
IN
= 2V
P-P

R
L
= 10k
A
V
= 1
A
V
= –1
Input Offset Drift vs Time
TIME AFTER POWER-UP (SEC)
CHANGE IN OFFSET VOLTAGE (µV)
40
30
20
10
0
–10
–20
–30
–40
LT1218/19 • TPC24
0 20 40 60 80 100 120 140 180 200160
V
S
= ±15V
V
S
= ±2.5V
C
L
= 0.22µF
C
L
= 0.1µF
LOAD CURRENT (mA)
–10
OVERSHOOT (%)
5
LT1218/19 • TPC22
–5 0 10
70
60
50
40
30
20
10
0
C
L
= 0.047µF
V
S
= ±15V
A
V
= 1