LT1222
500MHz, 3nV/√Hz, A
V
≥
10
Operational Amplifier
FEATURES
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DESCRIPTIO
Gain-Bandwidth: 500MHz
Gain of 10 Stable Uncompensated
Slew Rate: 200V/μs
Input Noise Voltage: 3nV/√Hz
C-Load
TM
Op Amp Drives Capacitive Loads
External Compensation Pin
Maximum Input Offset Voltage: 300μV
Maximum Input Bias Current: 300nA
Maximum Input Offset Current: 300nA
Minimum Output Swing Into 500Ω:
±12V
Minimum DC Gain: 100V/mV, R
L
= 500Ω
Settling Time to 0.1%: 75ns, 10V Step
Settling Time to 0.01%: 120ns, 10V Step
Differential Gain: 0.4%, A
V
= 2, R
L
= 150Ω
Differential Phase: 0.1°, A
V
= 2, R
L
= 150Ω
The LT
®
1222 is a low noise, very high speed operational
amplifier with superior DC performance. The LT1222 is
stable in a noise gain of 10 or greater without compensa-
tion, or the part can be externally compensated for lower
closed-loop gain at the expense of lower bandwidth and
slew rate. It features reduced input offset voltage, lower
input bias currents, lower noise and higher DC gain than
devices with comparable bandwidth and slew rate. The
circuit is a single gain stage that includes proprietary DC
gain enhancement circuitry to obtain precision with high
speed. The high gain and fast settling time make the circuit
an ideal choice for data acquisition systems. The circuit is
also capable of driving capacitive loads which makes it
useful in buffer or cable driver applications. The compen-
sation node can also be used to clamp the output swing.
The LT1222 is a member of a family of fast, high perfor-
mance amplifiers that employ Linear Technology
Corporation’s advanced complementary bipolar process-
ing. For unity-gain stable applications the LT1220 can be
used, and for gains of 4 or greater the LT1221 can be used.
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation.
APPLICATIO S
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Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Cable Drivers
8-, 10-, 12-Bit Data Acquisition Systems
TYPICAL APPLICATIO
A
V
= 10 with Output Clamping
15V
3k
A
V
= – 1, C
C
= 30pF Pulse Response
1N5711
3
5
6
1N5711
1N4148
0.1μF
V
IN
+
–
LT1222
2
⎥
V
OUT
⎥ ≤
0.5V
909Ω
100Ω
LT1222 • TA01
R
F
= R
G
= 1k
V
S
=
±15V
V
IN
= 100mV
f = 5MHz
U
LT1222 • TA02
U
U
1222fc
1
LINER [ LINEAR TECHNOLOGY ]
