Datasheet

8
LT1251/LT1256
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Slew Rate vs Temperature
Slew Rate vs Full-Scale
Reference Voltage
TEMPERATURE (°C)
–50
SLEW RATE (V/µs)
100
1251/56 G30
050
350
300
250
200
–25 25 75 125
V
S
= ±5V
A
V
= 1
NO LOAD
FREQUENCY (Hz)
1k
POWER SUPPLY REJECTION RATIO (dB)
80
70
60
50
40
30
20
10
0
100k10k
1251/56 G31
1M 10M
V
S
= ±5V
A
V
= 1
R
F
= 1.5k
V
C
= V
FS
= 2.5V
POSITIVE
NEGATIVE
Power Supply Rejection Ratio
vs Frequency
Settling Time to 1mV
vs Output Step
Output Impedance vs Frequency
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
100
10
1
0.1
0.01
10k 1M 10M
1251/56 G34
100k 100M
V
S
= ±5V
R
F
= 1.5k
V
C
= V
FS
= 2.5V
A
V
= 100
A
V
= 1, 10
SETTLING TIME (ns)
0
OUTPUT STEP (V)
25
50
75 100
1251/56 G32
125
10
8
6
4
2
0
–2
–4
–6
–8
–10
150
V
S
= ±15V
R
F
= 1.5k
INVERTING,
NONINVERTING
INVERTING
NONINVERTING
Settling Time to 10mV
vs Output Step
SETTLING TIME (ns)
0
OUTPUT STEP (V)
50 100
1251/56 G33
150
10
8
6
4
2
0
–2
–4
–6
–8
–10
200
INVERTING
INVERTING
NONINVERTING
NONINVERTING
V
S
= ±15V
R
F
= 1.5k
Differential Phase vs
Controlled Gain
Differential Gain vs
Controlled Gain
CONTROLLED GAIN, V
C
/V
FS
(%)
50
DIFFERENTIAL GAIN (%)
2
1
0
90
1251/56 G35
60
70
80
100
CONTROLLED GAIN, V
C
/V
FS
(%)
50
DIFFERENTIAL PHASE (DEG)
1.0
0.5
0
90
1251/56 G36
60
70
80
100
LT1251
Switching Transient (Glitch)
50mV
0
–50mV
2.5
0
V
FS
= 2.5V
R
F1
= R
F2
= 1.5k
V
S
= ±5V 1251/56 G37
V
C
V
OUT
FULL-SCALE REFERENCE VOLTAGE (V)
0
350
300
250
200
150
100
50
0
1.5
1251/56 G29
0.5 1.0 2.0 2.5
SLEW RATE (V/µs)
A
V
= 1
V
S
= ±15V
V
S
= ±5V