LT1122

Fast Settling, JFET Input Operational Amplifier

FEATURES DESCRIPTION

n 100% Tested Settling Time 340ns Typ to 1mV at Sum Node, 10V Step 540ns Max Tested with Fixed Feedback Capacitor

n Slew Rate 60V/µs Min

n Gain-Bandwidth Product 14MHz

n Power Bandwidth (20VP-P) 1.2 MHz n Unity-Gain Stable; Phase Margin 60° n Input Offset Voltage 600µV Max

n Input Bias Current 25°C 75pA Max 70°C 600pA Max

Input Offset Current 25°C 40pA Max 70°C 150pA Max
Low Distortion

APPLICATIONS

n Fast 12-Bit D/A Output Amplifiers

n High Speed Buffers

n Fast Sample-and-Hold Amplifiers

n High Speed Integrators

n Voltage to Frequency Converters

n Active Filters

n Log Amplifiers

n Peak Detectors

The LT ®1122 JFET input operational amplifier combines high speed and precision performance.

A unique poly-gate JFET process minimizes gate series resistance and gate-to-drain capacitance, facilitating wide bandwidth performance, without degrading JFET transis- tor matching.

It slews at 80V/µs and settles in 340ns. The LT1122 is internally compensated to be unity-gain stable, yet it has a bandwidth of 14MHz at a supply current of only 7mA. Its speed makes the LT1122 an ideal choice for fast settling 12-bit data conversion and acquisition systems.

The LT1122 offset voltage of 120µV, and voltage gain of 500,000 also support the 12-bit accurate applications.

The input bias current of 10pA and offset current of 4pA combined with its speed allow the LT1122 to be used in such applications as high speed sample and hold ampli- fiers, peak detectors, and integrators.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

12-Bit Voltage Output D/A Converter Large-Scale Response

0mA TO 2mA OR 4mA

2 –

LT1122 6

VOUT

5V/DIV

0V TO 10V

BIT CURRENT OUTPUT D/A CONVERTER CF = 5pF TO 17pF

(DEPENDING ON D/A CONVERTER USED)

LT1122•TA01

200ns/DIV AV = –1

1122 TA07

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Supply Voltage ...................................................... ± 20V

Differential Input Voltage ....................................... ± 40V Input Voltage.......................................................... ± 20V

Output Short Circuit Duration .......................... Indefinite

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

Operating Temperature Range

LT1122AM/BM/CM/DM (OBSOLETE).. –55°C to 125°C LT1122AC/BC/CC/DC/CS/DS ................. –40°C to 85°C

Storage Temperature Range

All Devices .......................................... –65°C to 150°C

PIN CONFIGURATION

TOP VIEW	TOP VIEW VOS 1 8 SPEED BOOST/ TRIM OVERCOMP –IN 2 7 V+ +IN 3 6 OUT V– 4 5 VOS TRIM S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, JA = 190°C/W
VOS 1 8 SPEED BOOST/
TRIM OVERCOMP
–IN 2 7 V+
+IN 3 6 OUT
V– 4 5 VOS TRIM
N8 PACKAGE
8-LEAD PDIP
TJMAX = 150°C, JA = 130°C/W
OBSOLETE PACKAGE
J8 PACKAGE 8-LEAD HERMETIC DIP
TJMAX = 175°C, JA = 100°C/W

ORDER INFORMATION

LEAD FREE FINISH	TAPE AND REEL	PART MARKING	PACKAGE DESCRIPTION	TEMPERATURE RANGE
LT1122ACN8#PBF	LT1122ACN8#TRPBF	LT1122ACN8	8-Lead Plastic DIP	–40°C to 85°C
LT1122BCN8#PBF	LT1122BCN8#TRPBF	LT1122BCN8	8-Lead Plastic DIP	–40°C to 85°C
LT1122CCN8#PBF	LT1122CCN8#TRPBF	LT1122CCN8	8-Lead Plastic DIP	–40°C to 85°C
LT1122DCN8#PBF	LT1122DCN8#TRPBF	LT1122DCN8	8-Lead Plastic DIP	–40°C to 85°C
LT1122CS8#PBF	LT1122CS8#TRPBF	1122C	8-Lead Plastic SO	–40°C to 85°C
LT1122DS8#PBF	LT1122DS8#TRPBF	1122D	8-Lead Plastic SO	–40°C to 85°C
OBSOLETE PACKAGE
LT1122AMJ8#PBF	LT1122AMJ8#TRPBF	LT1122AMJ8	8-Lead Hermetic DIP	–55°C to 125°C
LT1122BMJ8#PBF	LT1122BMJ8#TRPBF	LT1122BMJ8	8-Lead Hermetic DIP	–55°C to 125°C
LT1122CMJ8#PBF	LT1122CMJ8#TRPBF	LT1122CMJ8	8-Lead Hermetic DIP	–55°C to 125°C
LT1122DMJ8#PBF	LT1122DMJ8#TRPBF	LT1122DMJ8	8-Lead Hermetic DIP	–55°C to 125°C
LT1122ACJ8#PBF	LT1122ACJ8#TRPBF	LT1122ACJ8	8-Lead Hermetic DIP	–40°C to 85°C
LT1122BCJ8#PBF	LT1122BCJ8#TRPBF	LT1122BCJ8	8-Lead Hermetic DIP	–40°C to 85°C
LT1122CCJ8#PBF	LT1122CCJ8#TRPBF	LT1122CCJ8	8-Lead Hermetic DIP	–40°C to 85°C
LT1122DCJ8#PBF	LT1122DCJ8#TRPBF	LT1122DCJ8	8-Lead Hermetic DIP	–40°C to 85°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on nonstandard lead based finish parts.

For more information on lead free part markings, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V unless otherwise noted. (Note 2)

SYMBOL	PARAMETER	CONDITIONS	LT1122AM/BM LT1122AC/BC MIN TYP MAX			LT1122CM/DM LT1122CC/DC LT1122CS/DS MIN TYP MAX			UNITS
VOS	Input Offset Voltage			120	600		130	900	µV
IOS	Input Offset Current			4	40		5	50	pA
IB	Input Bias Current			10	75		12	100	pA
	Input Resistance Differential Common Mode	VCM = –10V to 8V VCM = 8V to 11V	1012 1012 1011			1012 1012 1011			Ω Ω Ω
	Input Capacitance		4			4			pF
SR	Slew Rate	AV = – 1	60	80		50	75		V/µs
	Settling Time (Note 2)	10V to 0V, – 10V to 0V 100% Tested: A- and C-Grades to 1mV at Sum Node B- and D-Grades to 1mV at Sum Node All Grades to 0.5mV at Sum Node		340 350 450	540		350 360 470	590	ns ns ns
GBW	Gain-Bandwidth Product Power Bandwidth	VOUT = 20VP-P	14 1.2			13 1.1			MHz MHz
AVOL	Large-Signal Voltage Gain	VOUT = ±10V, RL = 2kΩ VOUT = ±10V, RL = 600Ω	180 130	500 250		150 110	450 220		V/mV V/mV
CMRR	Common-Mode Rejection Ratio	VCM = ±10V	83	99		80	98		dB
	Input Voltage Range	(Note 4)	±10.5	±11		±10.5	±11		V
PSRR	Power Supply Rejection Ratio	VS = ±10V to ±18V	86	103		82	101		dB
	Input Noise Voltage	0.1Hz to 10Hz	3.0			3.3			µVP-P
	Input Noise Voltage Density	fO = 100Hz fO = 10kHz	25 14			27 15			nV/√Hz nV/√Hz
	Input Noise Current Density	fO = 100Hz, fO = 10kHz	2			2			fA/√Hz
VOUT	Output Voltage Swing	RL = 2kΩ RL = 600Ω	±12 ±11.5	±12.5 ±12		±12 ±11.5	±12.5 ±12		V V
IS	Supply Current			7.5	10		7.8	11	mA
	Minimum Supply Voltage	(Note 5)	±5			±5			V
	Offset Adjustment Range	RPOT ≥ 10k, Wiper to V+	±4	±10		±4	±10		mV

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at 0°C ≤ TA ≤ 70°C. VS = ±15V, VCM = 0V. (Note 2)

SYMBOL	PARAMETER	CONDITIONS		LT1122AC/BC MIN TYP MAX			LT1122CC/DC LT1122CS/DS MIN TYP MAX			UNITS
VOS	Input Offset Voltage		l		350	1400		400	2000	µV
	Average Temperature Coefficient of Input Offset Voltage		l		5	18		6	25	µV/°C
IOS	Input Offset Current		l		12	150		15	200	pA
IB	Input Bias Current		l		80	600		90	800	pA
AVOL	Large-Signal Voltage Gain	VOUT = ±10V, RL ≥ 2kΩ	l	120	380		100	340		V/mV
CMRR	Common-Mode Rejection Ratio	VCM = ±10V	l	82	98		78	96		dB
PSRR	Power Supply Rejection Ratio	VS = ±10V to ±17V	l	84	101		80	99		dB
	Input Voltage Range		l	±10	±10.8		±10	±10.8		V
VOUT	Output Voltage Swing	RL = 2kΩ	l	±11.5	±12.4		±11.5	±12.4		V
SR	Slew Rate	AV = –1	l	50	70		40	65		V/µs

The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at –55°C ≤ TA ≤ 125°C. VS = ±15V, VCM = 0V. (Note 2)

SYMBOL	PARAMETER	CONDITIONS		LT1122AM/BM MIN TYP MAX	LT1122CS/DS MIN TYP MAX	UNITS
VOS	Input Offset Voltage		l	650 2400	800 3400	µV
	Average Temperature Coefficient of Input Offset Voltage		l	6 18	7 25	µV/°C
IOS	Input Offset Current		l	0.5 6	0.6 9	nA
IB	Input Bias Current		l	6 25	7 35	nA
AVOL	Large-Signal Voltage Gain	VOUT = ±10V, RL ≥ 2kΩ	l	70 230	60 200	V/mV
CMRR	Common-Mode Rejection Ratio	VCM = ±10V	l	80 97	76 94	dB
PSRR	Power Supply Rejection Ratio	VS = ±10V to ±17V	l	83 100	78 98	dB
	Input Voltage Range		l	±10 ±10.5	±10 ±10.5	V
VOUT	Output Voltage Swing	RL = 2kΩ	l	±11.3 ±12.1	±11.3 ±12.1	V
SR	Slew Rate	AV = –1	l	45 60	35 55	V/µs

The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at –40°C ≤ TA ≤ 85°C. VS = ±15V, VCM = 0V. (Note 6)

SYMBOL	PARAMETER	CONDITIONS		LT1122AM/BM MIN TYP MAX	LT1122CS/DS MIN TYP MAX	UNITS
VOS	Input Offset Voltage		l	450 1900	500 2700	µV
	Average Temperature Coefficient of Input Offset Voltage		l	6 20	7 28	µV/°C
IOS	Input Offset Current		l	30 600	40 900	pA
IB	Input Bias Current		l	230 2000	260 2700	pA
AVOL	Large-Signal Voltage Gain	VOUT = ±10V, RL ≥ 2kΩ	l	95 340	80 300	V/mV
CMRR	Common-Mode Rejection Ratio	VCM = ±10V	l	80 98	76 96	dB
PSRR	Power Supply Rejection Ratio	VS = ±10V to ±17V	l	83 100	78 98	dB
	Input Voltage Range		l	±10 ±10.6	±10 ±10.6	V
VOUT	Output Voltage Swing	RL = 2kΩ	l	±11.3 ±12.2	±11.3 ±12.2	V
SR	Slew Rate	AV = –1	l	45 60	35 60	V/µs

ELECTRICAL CHARACTERISTICS

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.

Note 2: The LT1122 is measured in an automated tester in less than one second after application of power. Depending on the package used, power dissipation, heat sinking, and air flow conditions, the fully warmed up chip temperature can be 10°C to 50°C higher than the ambient temperature.

Note 3: Settling time is 100% tested for A- and C-grades using the settling time test circuit shown. This test is not included in quality assurance sample testing.

Note 4: Input voltage range functionality is assured by testing offset voltage at the input voltage range limits to a maximum of 4mV

(A, B grades), to 5.7mV (C, D grades).

Note 5: Minimum supply voltage is tested by measuring offset voltage to 7mV maximum at ±5V supplies.

Note 6: The LT1122 is not tested and not quality-assurance-sampled at –40°C and at 85°C. These specifications are guaranteed by design,

correlation and/or inference from –55°C, 0°C, 25°C, 70°C and/or 125°C tests.

Settling Time Test Fixture

DEVICE UNDER TEST

5pF

10V (REGULATED)

51Q

4 HA5002

15V

8 51Q

1% 2 –

2k 1%

15V

LT1122 6

4 6 1

74LS00 5

GROUND ALL

OTHER INPUTS 2

16 5

–15V

VIN

3 +

5.1k*

–15V

5.1k

TTL 1 3

IN 2

LTC201A

14 (MEASURE INPUT PULSE HERE)

15V

0.1µF

–10V (REGULATED)

1µF TANT

NO CONNECTION ON PINS 10, 11, 12, 14, AND 15

SETTLING TIME OUTPUT

15V

7 + 3

LT1223

–

15V

51Q 8 1

HA5002

4 51Q

SUMMING NODE OUTPUT

0.1µF

–15V

1µF TANT

TYPICAL SUPPLY BYPASSING FOR EACH AMP/BUFFER

(20 TIMES SUM NODE OUTPUT)

1N5712

–15V

1.5k –15V

79Q

*THIS RESISTOR CAN BE ADJUSTED TO NULL OUT ALL OFFSETS AT THE SETTLING TIME OUTPUT. THE AUTOMATED TESTER USES A SEPARATE AUTOZERO CIRCUIT.

1N5712

LT1122•TA02

TYPICAL PERFORMANCE CHARACTERISTICS

Settling Time

(Input from –10V to 0V)

Settling Time

(Input from 10V to 0V)

Settling Time

(Input from 0V to 10V)

1mV/DIV AT SUM NODE

100ns/DIV 1122 G01

100ns/DIV 1122 G02

100ns/DIV 1122 G03

Settling Time

(Input from 0V to –10V) Large-Signal Response

Undistorted Output Swing vs Frequency

VS = ±15V TA = 25°C

1mV/DIV AT SUM NODE

PEAK-TO-PEAK OUTPUT SWING (V)

5V/DIV

100ns/DIV 1122 G04

AV = 1

200ns/DIV

1122 G05 5

100k

1M 10M 100M FREQUENCY (Hz)

1122 TPC01

120

100

GAIN (dB)

–20

–40

Voltage Gain vs Frequency Gain, Phase vs Frequency

						VS = ±15V TA = 25°C

GAIN (dB)

VS = ±15V TA = 25°C CL = 15pF

100

120

140

160

180

200

120

COMMON-MODE REJECTION RATIO (dB)

100

PHASE SHIFT (DEGREES)

Common-Mode Rejection vs Frequency

				VS = ±15V TA = 25°C

1 10 100 1k 10k 100k 1M 10M 100M 1M

10M

100M

100

1k 10k

100k

1M 10M

100M

FREQUENCY (Hz)

1122 TPC02

FREQUENCY (Hz)

1122 TPC03

FREQUENCY (Hz)

1122 TPC04

TYPICAL PERFORMANCE CHARACTERISTICS

Distribution of Input Offset Voltage

Input Bias and Offset Currents Over Temperature

Bias and Offset Currents Over the Common-Mode Range

800

NUMBER OF UNITS

600

400

200

3370 UNITS TESTED IN ALL PACKAGES

VS = ±15V TA = 25°C

(NOT WARMED UP)

100k

INPUT BIAS AND OFFSET CURRENTS (pA)

30k 10k 3k 1k 300

100

VS = ±15V VCM = 0V

BIAS CURRENT

RENT

OFFSET CUR

120

INPUT BIAS AND OFFSET CURRENT (pA)

100

VS = ±15V TA = 25°C

(NOT-WARMED UP)

OFFSET CURRENT

BIAS CURRENT

–900

–500 –100 100 500

900

0 25 50 75 100 125

15 10 5 0

5 10 15

INPUT OFFSET VOLTAGE (µV)

CHIP TEMPERATURE (°C)

COMMON-MODE INPUT VOLTAGE (V)

1122 TPC05

1122 TPC06

1122 TPC07

250

Warm-Up Drift Noise Spectrum 0.1Hz to 10Hz Noise

1000

VS = ±15V TA = 25°C

VS = ±15V

CHANGE IN OFFSET VOLTAGE (µV)

200

150

100

TA = 25°C

SO PACKAGE

N PACKAGE J PACKAGE

VOLTAGE NOISE DENSITY (nV/√Hz)

NOISE VOLTAGE (1µV/DIV)

100

IN STILL AIR (SO PACKAGE SOLDERED ONTO BOARD)

0 1 2 3

1 3 10

30 100 300 1k 3k

10k

0 2 4 6

8 10

TIME AFTER POWER ON (MINUTES)

1122 TPC08

FREQUENCY (Hz)

1122 TPC09

TIME (SECONDS)

Intermodulation Distortion

1122 TPC10

TOTAL HARMONIC DISTORTION + NOISE (%)

0.1

Total Harmonic Distortion + Noise vs Frequency Inverting Gain

TA = 25°C VS = ±15V

ZL = 5k//15pF

0.1

Total Harmonic Distortion + Noise vs Frequency Noninverting Gain

INTERMODULATION DISTORTION (IMD) (%)

0.1

(CCIF Method) vs Frequency LT1122 and LF156*

VS = ±15V TA = 25°C AV = –10

0.01

0.001

0.0001

VO = 7V RMS

AV = –50

AV = –10

AV = –1

0.01

0.001

0.0001

AV = 10

AV =1

AV = 50

TA = 25°C VS = ±15V

ZL = 5k//15pF

VO = 7V RMS

0.01

0.001

0.0001

VO = 7V RMS

ZL = 5k//15pF

LF156

LT1122

20 100 1k

FREQUENCY (Hz)

10k 20k

20 100 1k

TOTAL HARMONIC DISTORTION + NOISE (%)

FREQUENCY (Hz)

10k 20k

3k 10k 20k

FREQUENCY (Hz)

1122 TPC11

1122 TPC12

*SEE LT1115 DATA SHEET FOR DEFINITION

OF CCIF TESTING 1122 TPC13

APPLICATIONS INFORMATION

Settling Time Measurements

Settling time test circuits shown on some competitive devices’ data sheets require:

A“flat top” pulse generator. Unfortunately, flat top pulse generators are not commercially available.
A variable feedback capacitor around the device under test. This capacitor varies over a four-to-one range. Presumably, as each op amp is measured for settling time, the capacitor is fine tuned to optimize settling time for that particular device.
A small inductor load to optimize settling.

The power supply connections to the LT1122 must maintain a low impedance to ground over a bandwidth of 20MHz. This is especially important when driving a significant resistive or capacitive load, since all current delivered to the load comes from the power supplies. Multiple high quality bypass capacitors are recommended for each power supply line in any critical application. A 0.1µF ceramic and a 1µF electrolytic capacitor, as shown, placed as close as possible to the amplifier (with short lead lengths to power supply common) will assure adequate high frequency bypassing, in most applications.

V+

The LT1122’s settling time is 100% tested in the test circuit shown. No “flat top” pulse generator is required. The test circuit can be readily constructed, using commercially available ICs. Of course, standard high frequency board construction techniques should be followed. All LT1122s are measured with a constant feedback capacitor. No fine

2 –

LT1122

3 +

1µF 0.1µF

tuning is required.

V–

1122 TA03

Speed Boost/Overcompensation Terminal

Pin 8 of the LT1122 can be used to change the input stage operating current of the device. Shorting Pin 8 to the posi- tive supply (Pin 7) increases slew rate and bandwidth by about 25%, but at the expense of a reduction in phase margin by approximately 18 degrees. Unity-gain capacitive load handling decreases from typically 500pF to 100pF.

Conversely, connecting a 15k resistor from Pin 8 to ground pulls 1mA out of Pin 8 (with V+ = 15V). This reduces slew rate and bandwidth by 25%. Phase margin and capacitive load handling improve; the latter typically increasing to 800pF.

High Speed Operation

When the feedback around the op amp is resistive (RF), a pole will be created with RF, the source resistance and capacitance (RS, CS), and the amplifier input capacitance (CIN ≈ 4pF). In low closed-loop gain configurations and with RS and RF in the kilohm range, this pole can create excess phase shift and even oscillation. A small capaci- tor (CF) in parallel with RF eliminates this problem. With RS (CS + CIN) = RFCF, the effect of the feedback pole is completely removed.

–

As with most high speed amplifiers, care should be taken with supply decoupling, lead dress and component placement.

RS CS

CIN

OUTPUT

1122 TA04

TYPICAL APPLICATIONS

Quartz Stabilized Oscillator With 9ppm Distortion

–15V

OUTPUT

4.7k

560k

430pF

50k

DISTORTION TRIM

4kHz JCUT

47k

LT1122

–

LT1010

LT1004 2.5V

4.7k 5k

4.7k

MOUNT IN CLOSE PROXIMITY

OUTPUT AMPLITUDE TRIM

15V

–

LT1006

10µF

470W

–

LT1122

–15V

1/4 LTC201

15V

1M 560k

Q1 2N3904

GROUND CRYSTAL CASE

= VACTEC VTL5C10 OR CLAIREX CLM410

100k

= 1N4148

1122 TA05

N Package

8-Lead PDIP (Narrow .300 Inch)

(Reference LTC DWG # 05-08-1510 Rev I)

255 .015* 477 0.381)	(10.160) MAX
		8	7	6	5

		1	2	3	4

. (6.

.400*

.300 – .325

(7.620 – 8.255)

.045 – .065

(1.143 – 1.651)

.130 .005

(3.302 0.127)

NOTE:

.008 – .015

(0.203 – 0.381)

–.015

.325 +.035

–0.381

8.255 +0.889

INCHES

.065

(1.651) TYP

.100 (2.54)

BSC

.120

(3.048) MIN

.018 .003

(0.457 0.076)

.020

(0.508) MIN

N8 REV I 0711

DIMENSIONS ARE MILLIMETERS

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)

PACKAGE DESCRIPTION

.045 – .065

NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE (1.143 – 1.651) OR TIN PLATE LEADS

.200

(5.080) MAX

1 2 3 4

.220 – .310

(5.588 – 7.874)

.025

(0.635) RAD TYP

6 5

.023 – .045

(0.584 – 1.143) HALF LEAD OPTION

.045 – .068

(1.143 – 1.650) FULL LEAD OPTION

.300 BSC (7.62 BSC)

8 7

MAX

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

J8 Package

3-Lead CERDIP (Narrow .300 Inch, Hermetic)

(Reference LTC DWG # 05-08-1110)

CORNER LEADS OPTION (4 PLCS)

.005

(0.127) MIN

.405 (10.287)

.015 – .060

(0.381 – 1.524)

.008 – .018

(0.203 – 0.457)

0° – 15°

OBSOLETE PACKAGE

For more information www.linear.com/LT1122

1122fb

.125

3.175

MIN

J8 0801

.100

(2.54) BSC

.014 – .026

(0.360 – 0.660)

S8 Package

8-Lead Plastic Small Outline (Narrow .150 Inch)

(Reference LTC DWG # 05-08-1610 Rev G)

.050 BSC

.045 .005

.189 – .197

(4.801 – 5.004)

NOTE 3

8 7 6 5

.245

MIN

.160 .005

.228 – .244

(5.791 – 6.197)

.150 – .157

(3.810 – 3.988)

NOTE 3

.030 .005

TYP

RECOMMENDED SOLDER PAD LAYOUT

.010 – .020  45

(0.254 – 0.508)

.008 – .010

(0.203 – 0.254)

0– 8 TYP

1 2 3 4

.053 – .069

(1.346 – 1.752)

.004 – .010

(0.101 – 0.254)

NOTE:

.016 – .050

(0.406 – 1.270)

INCHES

.014 – .019

(0.355 – 0.483) TYP

.050

(1.270) BSC

DIMENSIONS IN (MILLIMETERS)
DRAWING NOT TO SCALE
THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
PIN 1 CAN BE BEVEL EDGE OR A DIMPLE

SO8 REV G 0212

REVISION HISTORY (Revision history begins at Rev B)

REV	DATE	DESCRIPTION	PAGE NUMBER
B	02/14	Updated data sheet to current standards. New Order Information Table, Package Descriptions	2, 10-12

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 representa- tion that the interconnecFtioornmofoitrseciirncfuoitrsmasadtieosncriwbewdwh.elrineienawr.icllonmot/inLTfr1in1g2e2on existing patent rights.

1122fb

TYPICAL APPLICATION

Wide-Band, Filtered, Full Wave Rectifier

200k

20k

100k

200k

1µF

50k

VIN

20k 1%

–

LT1122

1% 1k

–

LT1122

EOUT DC

OUTPUT DC = RMS VALUE OF INPUT BANDWIDTH WITH 10VP-P INPUT = 2MHz

1122 TA06

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PART NUMBER	DESCRIPTION	COMMENTS
LT1022	High Speed Precision JFET Op Amp	23V/µs Min Slew Rate, 250µV VOS
LT1055/LT1056	Precision High Speed JFET Op Amps	16V/µs Slew Rate, 150µV VOS
LT1464	1MHz C-Load™ Stable JFET Op Amp	Capacitive Loads Up to 10nF
LTC ®6244	50MHz Low Noise CMOS Op Amp	1pA IB, 100µV Max VOS, 1.5µVP-P, 0.1Hz to 10Hz Noise

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 950F3o5r -m7o4r1e7information www.linear.com/LT1122 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT1122

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LT 0214 REV B • PRINTED IN USA

LINEAR TECHNOLOGY CORPORATION 1991

Mouser Electronics

Authorized Distributor

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Analog Devices Inc.:

LT1122ACN8 LT1122DCN8 LT1122DS8#PBF LT1122BCN8#PBF LT1122DS8#TR LT1122CCN8 LT1122DCN8#PBF LT1122CS8#PBF LT1122DS8#TRPBF LT1122CS8#TR LT1122CS8 LT1122CCN8#PBF LT1122BCN8 LT1122DS8 LT1122ACN8#PBF LT1122CS8#TRPBF