LT1008_15 Datasheet, PDF (5/16 Pages) Linear Technology – Picoamp Input Current, Microvolt Offset, Low Noise Op Amp

W
FREQUE CY CO PE SATIO CIRCUITS
LT1008
Standard Compensation Circuit
Alternate* Frequency Compensation
R1
–V_IN
R3
+V_IN
R2
**BANDWIDTH AND SLEW RATE
2–
ARE PROPORTIONAL TO 1/C_F
LT1008
3+
1
C_F**
6
V_OUT
8
C_F
≥
R1C_O
R1 + R2
C_O = 30pF
1008 FCC01
R1
R2
–V_IN
2–
6
LT1008
3+
+V_IN
8
C_S**
100pF
FOR
R2
R1
>
200,
NO
EXTERNAL
FREQUENCY
COMPENSATION
IS
NECESSARY
*IMPROVES REJECTION OF POWER
SUPPLY NOISE BY A FACTOR OF 5
**BANDWIDTH AND SLEW RATE ARE
PROPORTIONAL TO 1/C_S
V_OUT
1008 FCC02
TYPICAL PERFOR A CE CHARACTERISTICS
Offset Voltage Drift vs Source
Resistance (Balanced or
Unbalanced)
100
10
Offset Voltage vs Source
Resistance (Balanced or
Unbalanced)
10
V_S = ±15V
T_A = 25°C
1
MAXIMUM
1
TYPICAL
0.1
1k
10k 100k 1M 10M 100M
SOURCE RESISTANCE (Ω)
1008 G01
Warm-Up Drift
5
V_S = ±15V
T_A = 25°C
4
3
2
METAL CAN (H) PACKAGE
DUAL-IN-LINE PACKAGE
1
PLASTIC (N) OR CERDIP (J)
0
0
1
2
3
4
5
TIME AFTER POWER ON (MINUTES)
1008 G04
MAXIMUM
0.1
TYPICAL
0.01
1k
10k 100k 1M 10M 100M
SOURCE RESISTANCE (Ω)
1008 G02
Long-Term Stability of Four
Representative Units
10
8
6
4
2
0
–2
–4
–6
–8
–10
0
1
2
3
4
5
TIME (MONTHS)
1008 G05
Input Bias Current vs
Common Mode Range
60
V_S = ±15V
T_A = 25°C
40
DEVICE WITH POSITIVE INPUT CURRENT
20
R_INCM = 2 × 10¹²Î©
0
DEVICE WITH NEGATIVE INPUT CURRENT
–20
–
I_{B +}
V_CM
–40
–60
–15 –10 – 5 0
5
10 15
COMMON MODE INPUT VOLTAGE (V)
1008 G03
Offset Voltage Drift with
Temperature of Four
Representative Units
60
40
20
0
–20
–40
–60
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1008 G06
1008fb
5