8
LT1251/LT1256
TYPICAL PERFORMANCE CHARACTERISTICS
UW
Slew Rate vs Temperature
Slew Rate vs Full-Scale
Reference Voltage
TEMPERATURE (°C)
–50
SLEW
RATE
(V/
s)
100
1251/56 G30
050
350
300
250
200
–25
25
75
125
VS = ±5V
AV = 1
NO LOAD
FREQUENCY (Hz)
1k
POWER
SUPPLY
REJECTION
RATIO
(dB)
80
70
60
50
40
30
20
10
0
100k
10k
1251/56 G31
1M
10M
VS = ±5V
AV = 1
RF = 1.5k
VC = VFS = 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
(
)
100
10
1
0.1
0.01
10k
1M
10M
1251/56 G34
100k
100M
VS = ±5V
RF = 1.5k
VC = VFS = 2.5V
AV = 100
AV = 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
VS = ±15V
RF = 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
NONINVERTING
VS = ±15V
RF = 1.5k
Differential Phase vs
Controlled Gain
Differential Gain vs
Controlled Gain
CONTROLLED GAIN, VC /VFS (%)
50
DIFFERENTIAL
GAIN
(%)
2
1
0
90
1251/56 G35
60
70
80
100
CONTROLLED GAIN, VC /VFS (%)
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
VFS = 2.5V
RF1 = RF2 = 1.5k
VS = ±5V
1251/56 G37
VC
VOUT
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/
s)
AV = 1
VS = ±15V
VS = ±5V