LT1222 Linear Technology Corporation, LT1222 Datasheet

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LT1222

Manufacturer Part Number
LT1222
Description
500MHz, 3nV/rtHz, AV
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURE
A
TYPICAL
PPLICATI
Gain-Bandwidth: 500MHz
Gain of 10 Stable Uncompensated
Slew Rate: 200V/ s
Input Noise Voltage: 3nV/ Hz
C-Load
External Compensation Pin
Maximum Input Offset Voltage: 300 V
Maximum Input Bias Current: 300nA
Maximum Input Offset Current: 300nA
Minimum Output Swing Into 500 : 12V
Minimum DC Gain: 100V/mV, R
Settling Time to 0.1%: 75ns, 10V Step
Settling Time to 0.01%: 120ns, 10V Step
Differential Gain: 0.4%, A
Differential Phase: 0.1 , A
Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Cable Drivers
8-, 10-, 12-Bit Data Acquisition Systems
V
IN
100
TM
3
2
Op Amp Drives Capacitive Loads
+
S
LT1222
APPLICATION
A
909
O
V
= 10 with Output Clamping
5
U
1N5711
S
6
V
V
1N5711
= 2, R
= 2, R
V
OUT
U
L
15V
L
= 500
L
0.5V
3k
= 150
1N4148
= 150
LT1222 • TA01
0.1 F
D
The LT1222 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.
C-Load is a trademark of Linear Technology Cortporation.
ESCRIPTIO
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
R
V
500MHz, 3nV/ Hz, A
S
F
= R
= 15V
G
= 1k
A
V
Operational Amplifier
= – 1, C
V
f = 5MHz
IN
U
= 100mV
C
= 30pF Pulse Response
LT1222 • TA02
LT1222
V
10
1

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LT1222 Summary of contents

Page 1

... L = 150 sation node can also be used to clamp the output swing. L 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 greater the LT1221 can be used. ...

Page 2

... A BSOLUTE – Total Supply Voltage ( ............................. 36V Differential Input Voltage ........................................ 6V Input Voltage .......................................................... V Output Short-Circuit Duration (Note 1) ........... Indefinite Specified Temperature Range LT1222C (Note 2) ................................... LT1222M ......................................... – 125 C U PACKAGE/ORDER I FOR ATIO TOP VIEW NULL NULL –IN ...

Page 3

... Note 3: Input offset voltage is pulse tested and is exclusive of warm-up drift. Note 4: Slew rate is measured between 10V on an output swing of 12V. Note 5: FPBW = SR/2 V Note 6: Differential Gain and Phase are tested with five amps in series. Attenuators of 1/Gain are used as loads. LT1222 = 0V, unless otherwise specified. MIN TYP MAX 2 ...

Page 4

... 25° 101 100k S 100 0.1 10 100 1k 10k 100k FREQUENCY (Hz) LT1222 • TPC08 Output Voltage Swing vs Supply Voltage 25° 500 30mV – SUPPLY VOLTAGE (±V) LT1222 • TPC03 ...

Page 5

... C = 50pF 0 0.01 0.001 100 10k 100k 1M FREQUENCY (Hz) LT1222 • TPC14 Total Harmonic Distortion vs Frequency 0. ±15V RMS R = 500 L 0.001 A = ±10 V 0.0001 10 100 1k 125 FREQUENCY (Hz) 100 125 LT1222 • TPC12 10M 100M LT1222 • TPC15 10k 100k LT1222 • TPC18 5 ...

Page 6

... Stray capacitance on pin 5 should be minimized. Bias current cancellation circuitry is em- ployed on the inputs of the LT1222 so the input bias current and input offset current have identical specifications. For 0.1 F this reason, matching the impedance on the inputs to LT1222 • ...

Page 7

... SR = 1.2mA/(C An example would be a gain of –10 (noise gain of 11) and C = 20pF which has 10.5MHz bandwidth and 46V/ s slew C rate. It should be noted that the LT1222 is not stable unless C V feedback resistor. The 1k and input capacitance increase the noise gain at frequency to aid stability. ...

Page 8

... GAIN = [R4/R3][1 + (1/2)(R2/R1 + R3/R4) + (R2 + R3)/R5] = 102 TRIM R5 FOR GAIN TRIM R1 FOR COMMON-MODE REJECTION LT1222 • TA03 BW = 3MHz BIAS 1 COMP 5 2 –IN Two Op Amp Instrumemtation Amplifier R5 R4 220 10k R2 1k – – LT1220 + LT1222 + LT1222 • TA04 BIAS 2 6 OUT LT1222 • OUT ...

Page 9

... OPTION RAD TYP 1 0° – 15° 0.045 – 0.068 (1.143 – 1.727) 0.014 – 0.026 (0.360 – 0.660) LT1222 0.027 – 0.045 (0.686 – 1.143) 0.027 – 0.034 (0.686 – 0.864) 0.200 – 0.230 (5.080 – 5.842) 0.110 – 0.160 (2.794 – ...

Page 10

... LT1222 PACKAGE DESCRIPTION 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.025 0.325 –0.015 +0.635 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTURSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm Dimensions in inches (millimeters) unless otherwise noted. ...

Page 11

... S8 Package 8-Lead Plastic SOIC 8 0.228 – 0.244 (5.791 – 6.197) 1 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.014 – 0.019 (0.355 – 0.483) LT1222 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157* (3.810 – 3.988 0.004 – ...

Page 12

... LT1222 NORTHEAST REGION Linear Technology Corporation 3220 Tillman Drive, Suite 120 Bensalem, PA 19020 Phone: (215) 638-9667 FAX: (215) 638-9764 Linear Technology Corporation 266 Lowell St., Suite B-8 Wilmington, MA 01887 Phone: (508) 658-3881 FAX: (508) 658-2701 FRANCE Linear Technology S.A.R.L. Immeuble "Le Quartz" 58 Chemin de la Justice ...

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