LT1990 Datasheet, PDF (10/16 Pages) Linear Technology – 250V Input Range G = 1, 10, Micropower, Difference Amplifier

LT1990
TYPICAL PERFOR A CE CHARACTERISTICS
Output Impedance vs Frequency
5k
1k
G = 10
G=1
100
10
1
100
V_S = 5V, 0V
T_A = 25°C
1k
10k
FREQUENCY (Hz)
100k 200k
1990 G19
Settling Time vs Output Step,
G=1
60
V_S = ±15V
R_L = 10k
50
40 ^{0.01% OF}
STEP
30
0.1% OF
STEP
0.01% OF
STEP
0.1% OF
STEP
20
–10 –8 –6 –4 –2 0 2 4 6 8 10
OUTPUT STEP (V)
1990 G22
Power Supply Rejection Ratio
vs Frequency
70
60
G=1
50
V_S = 5V, 0V
T_A = 25°C
40
30
G = 10
20
10
0
–10
–20
–30
–40
10
100
1k
10k
FREQUENCY (Hz)
100k 200k
1990 G20
Settling Time vs Output Step,
G = 10
320
V_S = ±15V
300
R_L = 10k
280
0.01% OF
260
STEP
240
0.01% OF
STEP
220
200
0.1% OF
180
STEP
160
0.1% OF
STEP
140
–10 –8 –6 –4 –2 0 2 4 6 8 10
OUTPUT STEP (V)
1990 G23
Warm-Up Drift vs Time
60
V_S = ±15V
T_A = 25°C
40 REFERRED TO INPUT
20
0
–20
–40
–60
0
10
20
30
40
50
TIME AFTER POWER-UP (S)
1990 G21
Voltage Noise Density
vs Frequency
10000
V_S = ±1.5V TO ±15V
T_A = 25°C
1000
100
1
10
100
1000
FREQUENCY (Hz)
10000
1990 G24
0.1 to 10Hz Noise Voltage
V_S = ±1.5V TO ±15V
T_A = 25°C
G=1
REF
0.01 to 1Hz Noise Voltage
V_S = ±1.5V TO ±15V
T_A = 25°C
G=1
REF
0 1 2 3 4 5 6 7 8 9 10
TIME (S)
1990 G25
10
0 10 20 30 40 50 60 70 80 90 100
TIME (S)
1990 G26
Overshoot vs Capacitive Load
30
V_OUT = ±50mV
GAIN = 1
25 ^{RL = 10k}
20
15
10
5
10
V_S = 3V, 0V
V_S = ±15V
100
1000
CAPACITIVE LOAD (pF)
10000
1990 G27
1990f