Texas Instruments LF412CD, LF412CDR, LF412CP Datasheet
VIOmax
LF412C
DUAL JFET-INPUT OPERATIONAL AMPLIFIER
SLOS010B – MARCH 1987 – REVISED AUGUST 1994
D
Low Input Bias Current...50 pA Typ
D
Low Input Noise Current
0.01 pA/√Hz
D
Low Supply Current...4.5 mA Typ
D
High Input impedance...10
D
Internally Trimmed Offset Voltage
D
Wide Gain Bandwidth...3 MHz Typ
D
High Slew Rate...13 V/µs Typ
Typ
12
Ω Typ
D OR P PACKAGE
(TOP VIEW)
1OUT
1IN –
1IN+
V
CC–
1
2
3
4
8
7
6
5
V
CC+
2OUT
2IN–
2IN+
description
This device is a low-cost, high-speed, JFET-input operational amplifier with very low input offset voltage and
a specified maximum input offset voltage drift. It requires low supply current yet maintains a large gain bandwidth
product and a fast slew rate. In addition, the matched high-voltage JFET input provides very low input bias and
offset currents.
The LF412C can be used in applications such as high-speed integrators, digital-to-analog converters,
sample-and-hold circuits, and many other circuits.
The LF412C is characterized for operation from 0°C to 70°C.
symbol (each amplifier)
IN –
IN +
–
+
OUT
AVAILABLE OPTIONS
PACKAGE
T
A
0°C to 70°C 3 mV LF412CD LF412CP
The D packages are available taped and reeled. Add the suffix R to the
device type (ie., LF412CDR).
AT 25°C
SMALL OUTLINE
(D)
PLASTIC DIP
(P)
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
Supply voltage, V
Differential input voltage, V
Input voltage, V
Duration of output short circuit unlimited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation 500 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating temperature range 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NOTE 1: Unless otherwise specified, the absolute maximum negative input voltage is equal to the negative power supply voltage.
18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC+
–18 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC–
(see Note 1) ±15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
±30 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ID
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1994, Texas Instruments Incorporated
1
LF412C
I
I
§
V
0
I
I
§
V
0
AVDLarge-signal differential voltage
V
±10 V
R
kΩ
V/mV
DUAL JFET-INPUT OPERATIONAL AMPLIFIER
SLOS010B – MARCH 1987 – REVISED AUGUST 1994
recommended operating conditions
Supply voltage, V
Supply voltage, V
CC +
CC –
MIN MAX
3.5 18 V
–3.5 –18 V
UNIT
electrical characteristics over operating free-air temperature range, V
= ±15 V (unless otherwise
CC±
specified)
PARAMETER TEST CONDITIONS T
V
IO
α
VIO
IO
IB
V
ICR
V
OM
r
i
CMRR Common-mode rejection ratio RS ≤ 10 kΩ 70 100 dB
k
SVR
I
CC
†
Full range is 0°C to 70°C.
‡
At least 90% of the devices meet this limit for α
§
Input bias currents of a FET-input operational amplifier are normal junction reverse currents, which are temperature sensitive. Pulse techniques
must be used that will maintain the junction temperatures as close to the ambient temperature as possible.
NOTE 2: Supply-voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously.
Input offset voltage VIC = 0, RS = 10 kΩ 25°C 1 3 mV
Average temperature coefficient of input offset
voltage
nput offset current
nput bias current
Common-mode input voltage range ±11
Maximum peak output voltage swing RL = 10 kΩ ±12 ±13.5 V
Input resistance TA = 25°C
Supply-voltage rejection ratio See Note 2 70 100 dB
Supply current 4.5 6.8 mA
.
VIO
VIC = 0, RS = 10 kΩ 10 20‡µV/°C
=
IC
=
IC
=
,
O
L
= 2
†
A
25°C 25 100 pA
70°C 4 nA
25°C 50 200 pA
70°C 8 nA
25°C 25 200
Full range 15 200
MIN TYP MAX UNIT
–11.5
to
14.5
12
10
V
Ω
operating characteristics, V
VO1/V
SR Slew rate 8 13 V/µs
B
1
V
n
I
n
2
Crosstalk attenuation f = 1 kHz 120 dB
O2
Unity-gain bandwidth 2.7 3 MHz
Equivalent input noise voltage f = 1 kHz, RS = 20 Ω 18 nV/√Hz
Equivalent input noise current f = 1 kHz 0.01 pA/√Hz
= ±15 V, TA = 25°C
CC±
PARAMETER TEST CONDITIONS MIN TYP MAX
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
UNIT
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