LT1806/LT1807
325MHz, Single/Dual,
Rail-to-Rail Input and Output, Low Distortion,
Low Noise Precision Op Amps
DESCRIPTION
FEATURES
The LT®1806/LT1807 are single/dual low noise rail-to-rail
input and output unity-gain stable op amps that feature a
325MHzgain-bandwidthproduct, a140V/μsslewrateand
a85mAoutputcurrent.Theyareoptimizedforlowvoltage,
high performance signal conditioning systems.
n
Gain Bandwidth Product: 325MHz
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Slew Rate: 140V/μs
Wide Supply Range: 2.5V to 12.6V
Large Output Current: 85mA
Low Distortion, 5MHz: –80dBc
Low Voltage Noise: 3.5nV/√Hz
Input Common Mode Range Includes Both Rails
Output Swings Rail-to-Rail
The LT1806/LT1807 have a very low distortion of –80dBc
at 5MHz, a low input referred noise voltage of 3.5nV/√Hz
andamaximumoffsetvoltageof550μVthatallowsthemto
be used in high performance data acquisition systems.
Input Offset Voltage (Rail-to-Rail): 550μV Max
Common Mode Rejection: 106dB Typ
Power Supply Rejection: 105dB Typ
Unity-Gain Stable
The LT1806/LT1807 have an input range that includes
both supply rails and an output that swings within 20mV
of either supply rail to maximize the signal dynamic range
in low supply applications.
Power Down Pin (LT1806)
Operating Temperature Range: –40°C to 85°C
Single in SO-8 and 6-Pin SOT-23 Packages
Dual in SO-8 and 8-Pin MSOP Packages
TheLT1806/LT1807maintaintheirperformanceforsupplies
from 2.5V to 12.6V and are specified at 3V, 5V and 5V
supplies. The inputs can be driven beyond the supplies
without damage or phase reversal of the output.
APPLICATIONS
n
Low Voltage, High Frequency Signal Processing
The LT1806 is available in an 8-pin SO package with the
standard op amp pinout and a 6-pin SOT-23 package. The
LT1807 features the standard dual op amp pinout and is
available in 8-pin SO and MSOP packages.These devices
can be used as plug-in replacements for many op amps
to improve input/output range and performance.
n
Driving A/D Converters
n
Rail-to-Rail Buffer Amplifiers
n
Active Filters
Video Line Driver
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Gain of 20 Differential A/D Driver
4096 Point FFT Response
0
+
V
A
= p5V
S
V
= 20
1/2 LT1807
–20
f
f
= 10Msps
= 1.4086MHz
SAMPLE
–
IN
R2
SFDR = 83dB
909Ω
–40
–60
5V
NONAVERAGED
V
= 200mV
IN
P-P
R1
100Ω
R5
49.9Ω
C1 5.6pF
C2 5.6pF
+AV
–AV
IN
V
IN
LTC®1420
C3
470pF
12 BITS
10Msps
–80
–100
–120
PGA GAIN = 1
V
= 4.096V
REF
IN
R6
49.9Ω
18067 TA01
R3
100Ω
–5V
R4
1k
0
1
2
3
4
5
–
FREQUENCY (MHz)
18067 TA02
1/2 LT1807
+
18067fb
1