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LF256H Arkusz danych(PDF) 6 Page - Texas Instruments

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Numer części LF256H
Szczegółowy opis  JFET Input Operational Amplifiers
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LF256H Arkusz danych(HTML) 6 Page - Texas Instruments

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LF155, LF156, LF256, LF257
LF355, LF356, LF357
SNOSBH0D – MAY 2000 – REVISED NOVEMBER 2015
www.ti.com
6.6 DC Electrical Characteristics, TA = TJ = 25°C, VS = ±15 V
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LF155
2
4
LF355
2
4
Supply current
LFx56, LF356B
5
7
mA
LF356
5
10
LF357
5
10
6.7 DC Electrical Characteristics
See
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LF15x, LF25x, LF356B
3
5
TA = 25°C
LF35x
3
10
VOS
Input offset voltage
RS = 50 Ω
LF15x
7
mV
Over
LF25x, LF356B
6.5
temperature
LF35x
13
Average TC of input
ΔVOS/ΔT
RS = 50 Ω
LF15x, LF25x, LF356B, LF35x
5
μV/°C
offset voltage
Change in average TC
μV/°C
ΔTC/ΔVOS
RS = 50 Ω
(2)
LF15x, LF25x, LF356B, LF35x
0.5
with VOS adjust
per mV
LF15x, LF25x, LF356B
3
20
TJ = 25°C
(1) (3)
pA
LF35x
3
50
IOS
Input offset current
LF15x
20
TJ ≤ THIGH
LF25x, LF356B
1
nA
LF35x
2
LF15x, LF25x, LF356B
30
100
TJ = 25°C
(1) (3)
pA
LF35x
30
200
IB
Input bias current
LF15x
50
TJ ≤ THIGH
LF25x, LF356B
5
nA
LF35x
8
RIN
Input resistance
TJ = 25°C
LF15x, LF25x, LF356B, LF35x
Ω
1012
LF15x, LF25x, LF356B
50
200
TA = 25°C
VS = ±15 V,
LF35x
25
200
AVOL
Large signal voltage gain
VO = ±10 V,
V/mV
LF15x, LF25x, LF356B
25
Over
RL = 2 kΩ
temperature
LF35x
15
VS = ±15 V, RL = 10 kΩ
LF15x, LF25x, LF356B, LF35x
±12
±13
VO
Output voltage swing
V
VS = ±15 V, RL= 2 kΩ
LF15x, LF25x, LF356B, LF35x
±10
±12
(1)
Unless otherwise stated, these test conditions apply:
LF15x
LF25x
LF356B
LF35x
Supply Voltage, VS
±15 V
≤ VS ≤ ±20 V
±15 V
≤ VS ≤ ±20 V
±15 V
≤ VS ≤ ±20 V
VS = ±15 V
TA
−55°C ≤ TA ≤ +125°C
−25°C ≤ TA ≤ +85°C
0°C
≤ TA ≤ +70°C
0°C
≤ TA ≤ +70°C
THIGH
+125°C
+85°C
+70°C
+70°C
and VOS, IB and IOS are measured at VCM = 0.
(2)
The Temperature Coefficient of the adjusted input offset voltage changes only a small amount (0.5
μV/°C typically) for each mV of
adjustment from its original unadjusted value. Common-mode rejection and open-loop voltage gain are also unaffected by offset
adjustment.
(3)
The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temperature,
TJ. Due to limited production test time, the input bias currents measured are correlated to junction temperature. In normal operation the
junction temperature rises above the ambient temperature as a result of internal power dissipation, Pd. TJ = TA + θJA Pd where θJA is
the thermal resistance from junction to ambient. Use of a heat sink is recommended if input bias current is to be kept to a minimum.
6
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LF156 LF256 LF356


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