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PDF LT1056AM Data sheet ( Hoja de datos )
| Número de pieza | LT1056AM | |
| Descripción | Precision/ High Speed/ JFET Input Operational Amplifiers | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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LT1055/LT1056
Precision, High Speed,
JFET Input Operational Amplifiers
FEATURES
s Guaranteed Offset Voltage
–55°C to 125°C
s Guaranteed Drift
s Guaranteed Bias Current
70°C
125°C
s Guaranteed Slew Rate
150µV Max
500µV Max
4µV/°C Max
150pA Max
2.5nA Max
12V/µs Min
U
APPLICATIONS
s Precision, High Speed Instrumentation
s Logarithmic Amplifiers
s D/A Output Amplifiers
s Photodiode Amplifiers
s Voltage-to-Frequency Converters
s Frequency-to-Voltage Converters
s Fast, Precision Sample-and-Hold
DESCRIPTION
The LT1055/LT1056 JFET input operational amplifiers
combine precision specifications with high speed perfor-
mance.
For the first time, 16V/µs slew rate and 6.5MHz gain-ban-
width product are simultaneously achieved with offset
voltage of typically 50µV, 1.2µV/°C drift, bias currents of
40pA at 70°C and 500pA at 125°C.
The 150µV maximum offset voltage specification is the
best available on any JFET input operational amplifier.
The LT1055 and LT1056 are differentiated by their operat-
ing currents. The lower power dissipation LT1055 achieves
lower bias and offset currents and offset voltage. The
additional power dissipation of the LT1056 permits higher
slew rate, bandwidth and faster settling time with a slight
sacrifice in DC performance.
The voltage-to-frequency converter shown below is one of
the many applications which utilize both the precision and
high speed of the LT1055/LT1056.
For a JFET input op amp with 23V/µs guaranteed slew rate,
refer to the LT1022 data sheet.
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATION
0kHz to 10kHz Voltage-to-Frequency Converter
4.7k
15V
3M
0.001 (POLYSTYRENE)
0V TO 10V
INPUT
10kHZ
TRIM
5k
2N3906
= 1N4148
*1% FILM
–15V
0.1µF 22k
3.3M
2+
15V
7
LT1056
3– 4
–15V
33pF
6
OUTPUT
1Hz TO 10kHz
0.005%
1.5k LINEARITY
LM329
0.1µF
THE LOW OFFSET VOLTAGE OF LT1056
CONTRIBUTES ONLY 0.1Hz OF ERROR
WHILE ITS HIGH SLEW RATE PERMITS
10kHz OPERATION.
LT1055/56 TA01
Distribution of Input Offset Voltage
(H Package)
140 VS = ±15V
120
TA = 25°C
634 UNITS TESTED
FROM THREE RUNS
100
50% TO ±60µV
80
60
40
20
0
–400 –200
0
200 400
INPUT OFFSET VOLTAGE (µV)
LT1055/56 TA02
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LT1056 Large-Signal Response
Small-Signal Response
LT1055/LT1056
LT1055 Large-Signal Response
AV = 1, CL = 100pF, 0.5µs/DIV
LT1055/56 G10
Undistorted Output Swing vs
Frequency
30
VS = ±15V
TA = 25°C
24
18
LT1055
12
LT1056
6
0
0.1
1
FREQUENCY (MHz)
10
LT1055/56 G13
Gain vs Frequency
140
VS = ±15V
120 TA = 25°C
100
80
60
LT1055
LT1056
40
20
0
– 20
1
10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
LT1055/56 G16
AV = 1, CL = 100pF, 0.2µs/DIV
LT1055/56 G11
Slew Rate, Gain-Bandwidth vs
Temperature
30
10
LT1056 GBW
8
LT1055 GBW
20 6
LT1056 SLEW
10
LT1055 SLEW
4
2
VS = ±15V
f0 = 1MHz FOR GBW
0
–25 25
75
TEMPERATURE (˚C)
125
LT1055/56 G14
Gain, Phase Shift vs Frequency
100
20
PHASE
LT1055
LT1056
120
10
GAIN
LT1055
LT1056
140
0
VS = ±15V
TA = 25°C
–10
12
4
FREQUENCY (MHz)
6
160
8 10
LT1055/56 G17
AV = 1, CL = 100pF, 0.5µs/DIV
LT1055/56 G12
Output Impedence vs Frequency
100
VS = ±15V
TA = 25°C
AV = 100
LT1055
LT1056
10
AV = 10
LT1055
LT1056
1
LT1055
LT1056
AV = 1
0.1
1
10 100
FREQUENCY (kHz)
1000
LT1055/56 G15
Voltage Gain vs Temperature
1000
RL = 2k
VS = ±15V
VO = ±10V
300
RL = 1k
100
30
10
–75
–25 25
75
TEMPERATURE (°C)
125
LT1055/56 G18
5
5 Page 
LT1055/LT1056
TYPICAL APPLICATIONS
100kHz Voltage Controlled Oscillator
*1% FILM RESISTOR
=1N4148
FREQUENCY LINEARITY = 0.1%
FREQUENCY STABILITY = 150ppm/°C
SETTLING TIME = 1.7µs
DISTORTION = 0.25% AT 100kHz,
0.07% AT 10zHz
15V
2– 7
LT1056
6 X1
+V
22.1k
3+
4.5k
4
X2 CC
U1 W
–15V
U2 AD639 Z1
1k COM Z2
+15V
SINE OUT
2VRMS
0kHs TO 100kHs
0V TO 10V
INPUT
15V FINE
100kHz
DISTORTION
TRIM
9.09k* 2k
50k
10Hz
DISTORTION
TRIM
–15V
22M
POLYSTYRENE
DISTORTION
TRIMS
500pF
15pF
15V
68k
10k
VR
Y1
Y2
68k 5k
FREQUENCY
–15V
TRIM
10k* 2 –
7
LT1056
3+ 4
–15V
6 2N4391 2N4391 5k*
2N4391
2.5k*
2–
15V
7
LT1056
3+ 4
–15V
6 22k
HP5082-
2810
10k*
15V
2+ 8
LT1011
7
3– 1
4
1k
1k
20pF
10k
–15V
0.01µF
GT
UP
–V –15
10k
LM329
4.7k 4.7k
–15V
15V
12-Bit Voltage Output D/A Converter
12-BIT CURRENT OUTPUT D/A
CONVERTER (e.g., 6012,565
OR DAC-80)
0 TO 2
OR 4mA
CF = 15pF TO 33pF
SETTLING TIME TO 2mV
(0.8 LSB) = 1.5µs TO 2µs
CF
2–
15V
7
LT1056
6
3+
OUTPUT
4 0V TO 10V
–15V
LT1055/56 TA09
INPUT
±120V Output Precision Op Amp
125V
±25mA OUTPUT
HEAT SINK OUTPUT
TRANSISTORS
10k
100pF
10k
1µF
1N965
50k
2– 7
6
10k
LT1055
3+ 4
510Ω 330Ω
2N5415
1M 2N2222
1N4148
1N4148
50k 1M 2N2907
1k
1k
LT1055/56 TA08
2N3440
27Ω
27Ω
1N965
2N3440
10k
510Ω
330Ω
2N5415
OUTPUT
100k
33pF
1µF
–125V
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LT1055/56 TA10
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LT1056AM.PDF ] | |
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