Datasheet LT1222 Datasheet (Linear Technology)

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Page 1

LT1222

500MHz, 3nV/√Hz, AV ≥ 10

Operational Amplifier

EATU

■

Gain-Bandwidth: 500MHz

■

Gain of 10 Stable Uncompensated

■

Slew Rate: 200V/µs

■

Input Noise Voltage: 3nV/√Hz

■

C-LoadTM 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, RL = 500Ω

■

Settling Time to 0.1%: 75ns, 10V Step

■

Settling Time to 0.01%: 120ns, 10V Step

■

Differential Gain: 0.4%, AV = 2, RL = 150Ω

■

Differential Phase: 0.1°, AV = 2, RL = 150Ω

PPLICATI

■

Wideband Amplifiers

■

Buffers

■

Active Filters

■

Video and RF Amplification

■

Cable Drivers

■

8-, 10-, 12-Bit Data Acquisition Systems

U S

DUESCRIPTIO

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 compensation, 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 compensation node can also be used to clamp the output swing.

The LT1222 is a member of a family of fast, high performance amplifiers that employ Linear Technology Corporation’s advanced complementary bipolar processing. For unity-gain stable applications the LT1220 can be used, and for gains of 4 or greater the LT1221 can be used.

and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.

C-Load is a trademark of Linear Technology Cortporation.

TYPICAL APPLICATION

AV = 10 with Output Clamping AV = –1, CC = 30pF Pulse Response

15V

1N5711 1N5711

100Ω



LT1222

–

909Ω

 ≤ 0.5V

V

OUT

1N4148 0.1µF

LT1222 • TA01

RF = RG = 1k V

= ±15V

VIN = 100mV f = 5MHz

LT1222 • TA02

Page 2

LT1222

LUTEXI T

WUW

ARB

U G

Total Supply Voltage (V+ to V–) ............................. 36V

Differential Input Voltage ........................................ ±6V

Input Voltage .......................................................... ±V

Output Short-Circuit Duration (Note 1)........... Indefinite

Specified Temperature Range

LT1222C (Note 2)................................... 0°C to 70°C

LT1222M ......................................... –55°C to 125°C

TOP VIEW

H PACKAGE

= 175°C, θ

RDER I FOR ATIO

ORDER PART

NULL

–

= 150°C/W

OUT

CONSULT FACTORY

NUMBER SPECIAL

ORDER

PACKAGE

NULL

–IN

+IN

8-LEAD TO-5 METAL CAN

JMAX

Operating Temperature Range

LT1222C........................................... –40°C TO 85°C

LT1222M ......................................... –55°C to 125°C

Maximum Junction Temperature (See Below)

Plastic Package ............................................... 150°C

Ceramic Package ............................................. 175°C

Storage Temperature Range ................ –65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

TOP VIEW

NULL

1

–IN

2

+IN

3

–

J8 PACKAGE

8-LEAD CERAMIC DIP

S8 PACKAGE

8-LEAD PLASTIC SOIC

= 175°C, θ

JMAX

= 150°C, θ

JMAX

= 150°C, θ

JMAX

NULL

8



7

6

OUT

5



N8 PACKAGE

8-LEAD PLASTIC DIP

= 100°C/W (J)

= 130°C/W (N)

= 190°C/W (S)



ORDER PART

NUMBER

LT1222CN8 LT1222MJ8 LT1222CS8

S8 PART MARKING

1222

Consult factory for Industrial grade parts.

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

CMRR Common-Mode Rejection Ratio VCM = ±12V 100 120 dB PSRR Power Supply Rejection Ratio VS = ±5V to ±15V 98 110 dB A

VOL

OUT

SR Slew Rate (Note 4) 150 200 V/µs

GBW Gain-Bandwidth f = 1MHz 500 MHz

Input Offset Voltage (Note 3) 100 300 µV Input Offset Current 100 300 nA Input Bias Current 100 300 nA Input Noise Voltage f = 10kHz 3 nV/√Hz Input Noise Current f = 10kHz 2 pA/√Hz Input Resistance VCM = ±12V 20 45 MΩ

Inut Capacitance 2pF Input Voltage Range (Positive) 12 14 V

Input Voltage Range (Negative) –13 – 12 V

Large-Signal Voltage Gain V Output Swing RL = 500Ω 12 13 ±V Output Current V

Full Power Bandwidth 10V Peak (Note 5) 3.2 MHz

VS = ±15V, TA = 25°C, VCM = 0V, unless otherwise specified.

Differential 12 kΩ

= ±10V, RL = 500Ω 100 200 V/mV

OUT

= ±12V 24 26 mA

OUT

Page 3

LT1222

ELECTRICAL CHARACTERISTICS

VS = ±15V, TA = 25°C, VCM = 0V, unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

tr, t

Rise Time, Fall Time AV = 10, 10% to 90%, 0.1V 2.4 ns Overshoot AV = 10, 0.1V 45 % Propagation Delay AV = 10, 50% VIN to 50% V

Settling Time 10V Step, 0.1% 75 ns

, 0.1V 5.2 ns

OUT

10V Step, 0.01% 120 ns

Differential Gain AV = 2, CC = 50pF, f = 3.58MHz, RL = 150Ω (Note 6) 0.40 %

= 10, CC = 0pF, f = 3.58MHz, RL = 1k (Note 6) 0.15 %

Differential Phase AV = 2, CC = 50pF, f = 3.58MHz, RL = 150Ω (Note 6) 0.10 DEG

AV = 10, CC = 0pF, f = 3.58MHz, RL = 1k (Note 6) 0.01 DEG

= ±15V, 0°C ≤ TA ≤ 70°C, VCM = 0V, unless otherwise specified.

Output Resistance AV = 10, f = 1MHz 0.1 Ω Supply Current 8 10.5 mA

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage (Note 3) ● 100 600 µV Input VOS Drift 5 µV/°C

Input Offset Current ● 100 400 nA Input Bias Current ● 100 400 nA

CMRR Common-Mode Rejection Ratio VCM = ±12V ● 100 120 dB PSRR Power Supply Rejection Ratio VS = ±5V to ±15V ● 98 110 dB A V I

OUT

VOL OUT

Large-Signal Voltage Gain V

= ±10V, RL = 500Ω ● 100 200 V/mV

OUT

Output Swing RL = 500Ω ● 12 13 ±V Output Current V

= ±12V ● 24 26 mA

OUT

SR Slew Rate (Note 4) ● 150 200 V/µs I

Supply Current ● 811 mA

= ±15V, –55°C ≤ TA ≤ 125°C, VCM = 0V, unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage (Note 3) ● 100 600 µV Input VOS Drift 5 µV/°C

Input Offset Current ● 100 800 nA Input Bias Current ● 100 1000 nA

CMRR Common-Mode Rejection Ratio VCM = ±12V ● 98 120 dB PSRR Power Supply Rejection Ratio VS = ±5V to ±15V ● 98 110 dB A

VOL

OUT

Large-Signal Voltage Gain V

= ±10V, RL = 500Ω ● 50 200 V/mV

OUT

Output Swing RL = 500Ω ● 10 13 ±V

RL = 1k ● 12 13 ±V

OUT

Output Current V

= ±10V ● 20 26 mA

OUT

= ±12V ● 12 13 mA

OUT

SR Slew Rate (Note 4) ● 110 200 V/µs I

The ● denotes specifications which apply over the full temperature range.

Note 1: A heat sink may be required when the output is shorted indefinitely. Note 2: Commercial parts are designed to operate over –40°C to 85°C, but

are not tested nor guaranteed beyond 0°C to 70°C. Industrial grade parts specified and tested over –40°C to 85°C are available on special request.

Supply Current ● 811 mA

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/2πV

Note 6: Differential Gain and Phase are tested with five amps in series. Attenuators of 1/Gain are used as loads.

Consult factory.

Page 4

LT1222

MAGNITUDE OF OUTPUT VOLATGE (V)

5101520

LT1222 • TPC03

–V

SUPPLY VOLTAGE (±V)

TA = 25°C R

= 500Ω

∆V

= 30mV



LOAD RESISTANCE (Ω)

OPEN-LOOP GAIN (dB)

100

110

120

100 1k 10k

LT1222 • TPC06

VS = ±5V

VS = ±15V

TA = 25°C

FREQUENCY (Hz)

100

POWER SUPPLY REJECTION RATIO (dB)

100

120

1k 100k 10M 100M

LT1222 • TPC09

10k 1M

VS = ±15V T

= 25°C

–PSRR

+PSRR

TYPICAL PERFORMANCE CHARACTERISTICS

Input Common-Mode Range vs Supply Voltage

TA = 25°C

= 0.5mV

∆V



MAGNITUDE OF INPUT VOLTAGE (V)

5101520

SUPPLY VOLTAGE (±V)

–V

Output Voltage Swing vs Resistive Load

TA = 25°C ∆V

= 30mV

)

P-P

OUTPUT VOLTAGE SWING (V



100 1k 10k

LOAD RESISTANCE (Ω)

±15V SUPPLIES

±5V SUPPLIES

LT1222 • TPC01

LT1222 • TPC04

Supply Current vs Supply Voltage and Temperature

T = 125°C

SUPPLY CURRENT (mA)

5101520

SUPPLY VOLTAGE (±V)

T = 25°C

T = –55°C

Input Bias Current vs Input Common-Mode Voltage

500

VS = ±15V

400

= 25°C

300 200 100

–100

–200

INPUT BIAS CURRENT (nA)

–300 –400 –500

–15

–10 –5 10

INPUT COMMON-MODE VOLTAGE (V)

–

05 15

Output Voltage Swing vs Supply Voltage

LT1222 • TPC02

Open-Loop Gain vs Resistive Load

LT1222 • TPC05

Output Short-Circuit Current vs Temperature

VS = ±5V 

OUTPUT SHORT-CIRCUIT CURRENT (mA)

–50

–25 50 100 125

025 75

TEMPERATURE (°C)

LT1222 • TPC07

Input Noise Spectral Density

1000

100

INPUT VOLTAGE NOISE (nV/√Hz)

10 1k 10k 100k

100

FREQUENCY (Hz)

VS = ±15V T A R

= 25°C

= 101

= 100k

LT1222 • TPC08

Power Supply Rejection Ratio vs Frequency

100

INPUT CURRENT NOISE (pA/√Hz)

0.1

Page 5

SETTLING TIME (ns)

OUTPUT SWING (V)

100

LT1222 • TPC12

–2

–6

–4

–8

–10

125

10mV

1mV

VS = ±15V T

= 25°C

FREQUENCY (Hz)

0.01

OUTPUT IMPEDANCE (Ω)

0.1

10k 1M 10M 100M

LT1222 • TPC15

0.001 100k

VS = ±15V T

= 25°C

= 10

TYPICAL PERFORMANCE CHARACTERISTICS

LT1222

Common-Mode Rejection Ratio vs Frequency

120

100

COMMON-MODE REJECTION RATIO (dB)

10k

FREQUENCY (Hz)

100k 10M 100M

Voltage Gain and Phase vs Frequency

120

100

VOLTAGE GAIN (dB)

TA = 25°C

100

VS = ±15V

VS = ±5V

10k 1M 100M

FREQUENCY (Hz)

VS = ±5V

100k

VS = ±15V

= 25°C

LT1222 • TPC10

VS = ±15V

10M

LT1222 • TPC13

8 6 4

2 0

–2

OUTPUT SWING (V)

–4 –6 –8

–10

100

PHASE MARGIN (DEG)

–20

VOLTAGE MAGNITUDE (dB)

Output Swing and Error vs Settling Time (Noninverting)

VS = ±15V

= 25°C

10mV

SETTLING TIME (ns)

1mV

100

LT1222 • TPC11

Frequency Response vs Capacitive Load

VS = ±15V

= 25°C

= –10

26 24

22 20

18 16 14 12 10

C = 500pF

C = 1000pF

FREQUENCY (MHz)

C = 100pF

C = 50pF

LT1222 • TPC14

Output Swing and Error vs Settling Time (Inverting)

125

Closed-Loop Output Impedance vs Frequency

C = 0

100

Gain-Bandwidth vs Temperature

550

VS = ±15V

525

500

475

450

GAIN-BANDWIDTH (MHz)

425

400

–25 75

–50

25 50 100

TEMPERATURE (°C)

LT1222 • TPC16

125

SLEW RATE (V/µs)

275

VS = ±15V

= –10

250

= 0

) + (SR–)

(SR

SR =

225

200

175

150

125

–50

–25 75

25 50 100

TEMPERATURE (°C)

LT1222 • TPC17

Total Harmonic Distortion vs FrequencySlew Rate vs Temperature

0.01 VS = ±15V V

= 3V



RMS

= 500Ω

0.001 AV = ±10

0.0001

TOTAL HARMONIC DISTORTION AND NOISE (%)

125

10 100

FREQUENCY (Hz)

1k 10k 100k

LT1222 • TPC18

Page 6

LT1222

TYPICAL PERFORMANCE CHARACTERISTICS

Small Signal, AV = 10

Large Signal, AV = 10

Large Signal, AV = 10, CL = 10,000pF

RF = 909Ω R

= 100Ω

f = 5MHz V

= 20mV

= ±15V

Small Signal, AV = –10

RF = 1k R

= 100Ω (75)

= ±15V

= 20mV

LT1222 • TPC19 LT1222 • TPC20

RF = 909Ω R

= 100Ω

= ±15V

= 2V

Large Signal, AV = –10

LT1222 • TPC22 LT1222 • TPC23 LT1222 • TPC24

f = 5MHz

= 1k

= 100Ω (75)

VS = ±15V V

= 2V

WUU

APPLICATIONS INFORMATION

The LT1222 is stable in noise gains of 10 or greater and may be inserted directly into HA2520/2/5, HA2541/2/4, AD817, AD847, EL2020, EL2044 and LM6361 applications, provided that the nulling circuitry is removed and the amplifier configuration has a high enough noise gain. The suggested nulling circuit for the LT1222 is shown in the following figure.

Offset Nulling

LT1222

–

0.1µF

LT1222 • AI01

f = 2MHz

RF = 909Ω R

= 100Ω

VS = ±15V

= 2V

f = 20kHz

LT1222 • TPC21

Small Signal, AV = –10, CL = 1,000pF

f = 2MHz

= 1k

= 100Ω (75)

= ±15V

= 15mV

f = 500kHz

Layout and Passive Components

The LT1222 amplifier is easy to apply and tolerant of less than ideal layouts. For maximum performance (for example, fast settling time) use a ground plane, short lead lengths and RF-quality bypass capacitors (0.01µF to 0.1µF). For high drive current applications use low ESR bypass capacitors (1µF to 10µF tantalum). Sockets should be avoided when maximum frequency performance is required. For more details see Design Note 50. Feedback resistors greater than 5k are not recommended because a pole is formed with the input capacitance which can cause peaking or oscillations. Stray capacitance on pin 5 should be minimized. Bias current cancellation circuitry is employed on the inputs of the LT1222 so the input bias current and input offset current have identical specifications. For this reason, matching the impedance on the inputs to reduce bias current errors is not necessary.

Page 7

LT1222

WUU

APPLICATIONS INFORMATION

Output Clamping

Access to the internal compensation node at pin 5 allows the output swing of the LT1222 to be clamped. An example is shown on the first page of this data sheet. The compensation node is approximately one diode drop above the output and can source or sink 1.2mA. Back-to-back Schottky diodes clamp pin 5 to a diode drop above ground so the output is clamped to ± 0.5V (the drop of the Schottkys at

1.2mA). The diode reference is bypassed for good AC response. This circuit is useful for amplifying the voltage at false sum nodes used in settling time measurements.

Capacitive Loading

The LT1222 is stable with capacitive loads. This is accomplished by sensing the load induced output pole and adding compensation at the amplifier gain node. As the capacitive load increases, both the bandwidth and phase margin decrease. There will be peaking in the frequency domain as shown in the curve of Frequency Response vs Capacitive Load. The small-signal transient response will have more overshoot as shown in the photo of the small-signal response with 1000pF load. The large-signal response with a 10,000pF load shows the output slew rate being limited to 4V/µ s by the short-circuit current. The LT1222 can drive coaxial cable directly, but for best pulse fidelity a resistor of value equal to the characteristic impedance of the cable (i.e., 75Ω) should be placed in series with the output. The other end of the cable should be terminated with the same value resistor to ground.

Compensation

The LT1222 has a typical gain-bandwidth product of 500MHz which allows it to have wide bandwidth in high gain configurations (i.e., in a gain of 100, it will have a bandwidth of about 5MHz). For added flexibility the amplifier frequency response may be adjusted by adding capacitance from pin 5 to ground. The compensation capacitor

may be used to reduce overshoot, to allow the amplifier to be used in lower noise gains, or simply to reduce bandwidth. Table 1 shows gain and compensation capacitor vresus – 3dB bandwidth, maximum frequency peaking and small-signal overshoot.

Table 1

CC (pF) f

–1 30 99 4.2 36 –1 50 70 0.9 13 –1 82 32 0 0 –1 150 13 0 0 5 10 140 3.8 35 5 20 100 0 5 530 34 0 1 550 15 0 0 10 0 150 9.5 45 10 5 111 0.2 10 10 10 40 0 2 10 20 17 0 0 20 0 82 0.1 10 20 5 24 0 0 20 10 14 0 0

(MHz) Max Peaking (dB) Overshoot (%)

–3dB

For frequencies < 10MHz the frequency response of the amplifier is approximately:

f = 1/[2π × 53Ω × (CC + 6pF) × (Noise Gain)]

The slew rate is affected as follows:

SR = 1.2mA/(CC + 6pF)

An example would be a gain of –10 (noise gain of 11) and CC = 20pF which has 10.5MHz bandwidth and 46V/µ s slew rate. It should be noted that the LT1222 is not stable in AV = 1 unless CC = 50pF and a 1k resistor is used as the feedback resistor. The 1k and input capacitance increase the noise gain at frequency to aid stability.

Page 8

LT1222

–

LT1220

GAIN = [R4/R3][1 + (1/2)(R2/R1 + R3/R4) + (R2 + R3)/R5] = 102 TRIM R5 FOR GAIN TRIM R1 FOR COMMON-MODE REJECTION BW = 3MHz

OUT

–

LT1222

LT1222 • TA04

R3 1k

R5

220Ω

R4

10k

R2

R1

10k

TYPICAL APPLICATIONS N

VOS Null Loop

150k

LT1222

–

10k

100pF

150k

25k

25Ω

–

100pF

LT1097

LT1222 • TA03

SI PLIFIED SCHE ATIC

NULL

BIAS 1

OUT

AV = 1001

COMP

Two Op Amp Instrumemtation Amplifier

BIAS 2

+IN 3

–

6 OUT

–IN

LT1222 • SS

Page 9

PACKAGE DESCRIPTION

0.335 – 0.370

(8.509 – 9.398)

DIA



0.305 – 0.335

(7.747 – 8.509)



0.016 – 0.021

(0.406 – 0.533)



(1.270)

SEATING

PLANE

0.010 – 0.045

(0.254 – 1.143)

0.040

(1.016)

MAX



Dimensions in inches (millimeters) unless otherwise noted.

H8 Package

8-Lead TO-5 Metal Can

45°TYP

0.050

MAX

GAUGE PLANE

NOTE: LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND SEATING PLANE.

0.165 – 0.185

(4.191 – 4.699)



0.500 – 0.750

(12.700 – 19.050)



REFERENCE PLANE

0.027 – 0.034

(0.686 – 0.864)



0.110 – 0.160

(2.794 – 4.064)

INSULATING

STANDOFF



LT1222

0.027 – 0.045

(0.686 – 1.143)



0.200 – 0.230

(5.080 – 5.842)

BSC

H8(5) 0592

J8 Package

8-Lead Ceramic Dip

CORNER LEADS OPTION 

(4 PLCS)

0.023 – 0.045

(0.584 – 1.143)

HALF LEAD

0.045 – 0.068

(1.143 – 1.727)

FULL LEAD

OPTION

0.300 BSC

(0.762 BSC)

0.008 – 0.018

(0.203 – 0.457)

0.385 ± 0.025

(9.779 ± 0.635)

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS.

0° – 15°

OPTION

0.005

(0.127)

MIN

0.025

(0.635)

RAD TYP

0.045 – 0.068

(1.143 – 1.727)



0.014 – 0.026

(0.360 – 0.660)

0.405

(10.287)

MAX

0.220 – 0.310

(5.588 – 7.874)

0.015 – 0.060

(0.381 – 1.524)

0.100 ± 0.010

(2.540 ± 0.254)

0.200

(5.080)

MAX

0.125

3.175 MIN

J8 0694

Page 10

LT1222

PACKAGE DESCRIPTION

Dimensions in inches (millimeters) unless otherwise noted.

N8 Package

8-Lead Plastic Dip

0.400* (10.160)

MAX

0.255 ± 0.015* (6.477 ± 0.381)



876



0.300 – 0.325

(7.620 – 8.255)

0.065

(1.651)

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).

TYP

0.045 ± 0.015

(1.143 ± 0.381)

(2.540 ± 0.254)

0.045 – 0.065

(1.143 – 1.651)

0.100 ± 0.010

0.130 ± 0.005

(3.302 ± 0.127)

0.125

(3.175)

MIN



0.018 ± 0.003

(0.457 ± 0.076)

0.015

(0.380)

MIN

N8 0694

Page 11

PACKAGE DESCRIPTION

Dimensions in inches (millimeters) unless otherwise noted.

S8 Package

8-Lead Plastic SOIC

0.189 – 0.197* (4.801 – 5.004)

LT1222

(0.254 – 0.508)

0.008 – 0.010

(0.203 – 0.254)

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).

0.010 – 0.020

0.016 – 0.050

0.406 – 1.270

× 45°

0°– 8° TYP

0.228 – 0.244

(5.791 – 6.197)

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

0.150 – 0.157* (3.810 – 3.988)

(1.270)

0.004 – 0.010

(0.101 – 0.254)

0.050

BSC

SO8 0294

Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

Page 12

LT1222

U.S. Area Sales Offices

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 92290 Chatenay Malabry France Phone: 33-1-41079555 FAX: 33-1-46314613

GERMANY Linear Techonolgy GmbH

Untere Hauptstr. 9 D-85386 Eching Germany Phone: 49-89-3197410 FAX: 49-89-3194821

SOUTHEAST REGION Linear Technology Corporation

17060 Dallas Parkway Suite 208 Dallas, TX 75248 Phone: (214) 733-3071 FAX: (214) 380-5138

CENTRAL REGION Linear Technology Corporation

Chesapeake Square 229 Mitchell Court, Suite A-25 Addison, IL 60101 Phone: (708) 620-6910 FAX: (708) 620-6977

International Sales Offices

KOREA Linear Technology Korea Branch

Namsong Building, #505 Itaewon-Dong 260-199 Yongsan-Ku, Seoul Korea Phone: 82-2-792-1617 FAX: 82-2-792-1619

SINGAPORE Linear Technology Pte. Ltd.

507 Yishun Industrial Park A Singapore 2776 Phone: 65-753-2692 FAX: 65-754-4113

SOUTHWEST REGION Linear Technology Corporation

22141 Ventura Blvd. Suite 206 Woodland Hills, CA 91364 Phone: (818) 703-0835 FAX: (818) 703-0517

NORTHWEST REGION Linear Technology Corporation

782 Sycamore Dr. Milpitas, CA 95035 Phone: (408) 428-2050 FAX: (408) 432-6331

TAIWAN Linear Technology Corporation

Rm. 801, No. 46, Sec. 2 Chung Shan N. Rd. Taipei, Taiwan, R.O.C. Phone: 886-2-521-7575 FAX: 886-2-562-2285

UNITED KINGDOM Linear Technology (UK) Ltd.

The Coliseum, Riverside Way Camberley, Surrey GU15 3YL United Kingdom Phone: 44-276-677676 FAX: 44-276-64851

JAPAN Linear Technology KK

5F YZ Bldg. 4-4-12 Iidabashi, Chiyoda-Ku Tokyo, 102 Japan Phone: 81-3-3237-7891 FAX: 81-3-3237-8010

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7487

(408) 432-1900

●

FAX

: (408) 434-0507

●

TELEX

World Headquarters

Linear Technology Corporation

1630 McCarthy Blvd. Milpitas, CA 95035-7487 Phone: (408) 432-1900 FAX: (408) 434-0507

: 499-3977

0794

LT/GP 0894 5K REV A • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 1992

Datasheet LT1222 Datasheet (Linear Technology)

Specifications and Main Features

Frequently Asked Questions

User Manual