
1
LT1211/LT1212
FEATURES
APPLICATIO S
U
DESCRIPTIO
U
TYPICAL APPLICATIO
U
14MHz, 7V/µs, Single Supply
Dual and Quad
Precision Op Amps
■
Slew Rate: 7V/
µ
s Typ
■
Gain-Bandwidth Product: 14MHz Typ
■
Fast Settling to 0.01%
2V Step to 200µV: 900ns Typ
10V Step to 1mV: 2.2µs Typ
■
Excellent DC Precision in All Packages
Input Offset Voltage: 275µV Max
Input Offset Voltage Drift: 6µV/°C Max
Input Offset Current: 30nA Max
Input Bias Current: 125nA Max
Open-Loop Gain: 1200V/mV Min
■
Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground While Sinking Current
■
Low Input Noise Voltage: 12nV/√Hz Typ
■
Low Input Noise Current: 0.2pA/√Hz Typ
■
Specified on 3.3V, 5V and ±15V
■
Large Output Drive Current: 20mA Min
■
Low Supply Current per Amplifier: 1.8mA Max
■
Dual in 8-Pin DIP and SO-8
■
Quad in 14-Pin DIP and Narrow SO-16
The LT
®
1211 is a dual, single supply precision op amp with
a 14MHz gain-bandwidth product and a 7V/µs slew rate.
The LT1212 is a quad version of the same amplifier. The
DC precision of the LT1211/LT1212 eliminates trims in
most systems while providing high frequency perfor-
mance not usually found in single supply amplifiers.
The LT1211/LT1212 will operate on any supply greater
than 2.5V and less than 36V total. These amplifiers are
specified on single 3.3V, single 5V and ±15V supplies, and
only require 1.3mA of quiescent supply current per ampli-
fier. The inputs can be driven beyond the supplies without
damage or phase reversal of the output. The minimum
output drive is 20mA, ideal for driving low impedance
loads.
Note: For applications requiring higher slew rate, see the LT1213/LT1214 and
LT1215/LT1216 data sheets.
Input Bias Current Cancellation
–
+
V
IN
V
+
1/2
LT1211
R
F
V
OUT
1211/12 TA01
1M
SIGNAL AMP
–
+
1/2
LT1211
R
G
CANCELLATION
AMP
1M
22pF
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
2.5V Full-Scale 12-Bit Systems: V
OS
≤ 0.45LSB
■
10V Full-Scale 16-Bit Systems: V
OS
≤ 1.8LSB
■
Active Filters
■
Photo Diode Amplifiers
■
DAC Current-to-Voltage Amplifiers
■
Battery-Powered Systems
INPUT VOLTAGE (V)
0.01
INPUT CURRENT (nA)
0.1 1 10
1211/12 TA02
100
90
80
70
60
50
40
30
20
10
0
V
S
= 5V, V
OUT
IN
LINEAR REGION
R
IN
= 300M
R
IN
= 2.4G
WITHOUT CANCELLATION
WITH CANCELLATION
Input Current vs Input Voltage