LINEAR TECHNOLOGY LT1220 Technical data

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FEATURES

■

Gain-Bandwidth: 45MHz

■

Unity-Gain Stable

■

Slew Rate: 250V/µs

■

C-LoadTM Op Amp Drives Capacitive Loads

■

Maximum Input Offset Voltage: 1mV

■

Maximum Input Bias Current: 300nA

■

Maximum Input Offset Current: 300nA

■

Minimum Output Swing Into 500Ω: ±12V

■

Minimum DC Gain: 20V/mV, RL = 500Ω

■

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

■

Settling Time to 0.01%: 95ns, 10V Step

■

Differential Gain: 0.1%, AV = 2, RL = 150Ω

■

Differential Phase: 0.2°, AV = 2, RL = 150Ω

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APPLICATIO S

■

Wideband Amplifiers

■

Buffers

■

Active Filters

■

Video and RF Amplification

■

Cable Drivers

■

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

LT1220

45MHz, 250V/µs

Operational Amplifier

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DESCRIPTIO

The LT®1220 is a high speed operational amplifier with
superior DC performance. The LT1220 features reduced
input offset voltage, lower input bias currents 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 large
capacitive loads which makes it useful in buffer or cable
driver applications.

The LT1220 is a member of a family of fast, high perfor­mance amplifiers that employ Linear Technology
Corporation’s advanced complementary bipolar process­ing. For applications with gains of 4 or greater the LT1221
can be used, and for gains of 10 or greater the LT1222 can
be used for increased bandwidth.

, LTC and LT are registered trademarks of Linear Technology Corporation

C-Load is a trademark of Linear Technology Corporation

TYPICAL APPLICATIO

Two Op Amp Instrumentation Amplifier Inverter Pulse Response

R5

220Ω

–

LT1220

+

R2
1k

R3
1k

R1

10k

–

V

IN

+

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 = 450kHz

U

–

LT1220

+

R4

10k

LT1220 • TA01

V

OUT

RF = RG = 1k

= ±15V

V

S

V

= 20V

IN

f = 2MHz

LT1220 • TA02

1

LT1220

A

W

O

LUTEXI TIS

S

A

WUW

U

(Note 1)

ARB

G

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

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

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

S

Output Short-Circuit Duration (Note 2)........... Indefinite

Specified Temperature Range

LT1220C (Note 3)................................... 0°C to 70°C

LT1220M (OBSOLETE) ............... –55°C to 125°C

PACKAGE

1

NULL

2

–IN

3

+IN

8-LEAD TO-5 METAL CAN

T

= 175°C, θ

JMAX

/

O

RDER I FOR ATIO

TOP VIEW

NULL

8

4

–

V

H PACKAGE

7

5

= 150°C/W

JA

+

V

6

V

OUT

NC

WU

ORDER PART

NUMBER

LT1220CH

LT1220MH

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OBSOLETE PACKAGE

Consider the N8 or S8 Packages for Alternate Source

Consult LTC Marketing for parts specified with wider operating temperature ranges.

Operating Temperature Range

LT1220C........................................... –40°C TO 85°C

LT1220M (OBSOLETE) ............... –55°C to 150°C

Maximum Junction Temperature (See Below)

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

Ceramic Package (OBSOLETE) .................. 175°C

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

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

NULL

–IN
+IN

TOP VIEW

1
2
3

–

V

4

NULL

8

+

V

7

V

6

OUT

NC

5

ORDER PART

NUMBER

LT1220CN8
LT1220CS8

S8 PART MARKING

N8 PACKAGE

8-LEAD PLASTIC DIP

T

= 150°C, θ

JMAX

T

= 150°C, θ

JMAX

8-LEAD CERAMIC DIP

T

= 175°C, θ

JMAX

S8 PACKAGE

8-LEAD PLASTIC SOIC

= 130°C/W (N)

JA

= 190°C/W (S)

JA

J8 PACKAGE

ORDER PART

= 100°C/W (J)

JA

OBSOLETE PACKAGE

Consider the N8 Package for Alternate Source

1220

NUMBER

LT1220MJ8

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

OS

I

B

e

n

i

n

R

IN

C

IN

CMRR Common Mode Rejection Ratio VCM = ±12V 92 114 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V 90 94 dB
A

VOL

V

OUT

I

OUT

SR Slew Rate (Note 5) 200 250 V/µs

GBW Gain-Bandwidth f = 1MHz 45 MHz

Input Offset Voltage (Note 4) 0.5 1 mV
Input Offset Current 100 300 nA
Input Bias Current 100 300 nA
Input Noise Voltage f = 10kHz 17 nV/√Hz
Input Noise Current f = 10kHz 2 pA/√Hz
Input Resistance VCM = ±12V 20 45 MΩ

Input 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 6) 4 MHz

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

Differential 150 kΩ

= ±10V, RL = 500Ω 20 50 V/mV

OUT

= ±12V 24 26 mA

OUT

2

LT1220

ELECTRICAL CHARACTERISTICS

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

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

tr, t

f

Rise Time, Fall Time AV = 1, 10% to 90%, 0.1V 2.5 ns
Overshoot AV = 1, 0.1V 5 %
Propagation Delay AV = 1, 50% VIN to 50% V

t

s

Settling Time 10V Step, 0.1% 75 ns

, 0.1V 4.9 ns

OUT

10V Step, 0.01% 95 ns

Differential Gain f = 3.58MHz, RL = 150Ω (Note 7) 0.10 %

f = 3.58MHz, R

= 1k (Note 7) 0.02 %

L

Differential Phase f = 3.58MHz, RL = 150Ω (Note 7) 0.20 DEG

f = 3.58MHz, RL = 1k (Note 7) 0.03 DEG

R

O

I

S

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

The ● denotes the specifications which apply over the temperature range 0°C ≤ TA ≤ 70°C, otherwise specifications are at TA = 25°C.
VS = ±15V, VCM = 0V, unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage (Note 4) ● 0.5 3.5 mV
Input VOS Drift ● 20 µV/°C

I

OS

I

B

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

CMRR Common Mode Rejection Ratio VCM = ±12V ● 92 114 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V ● 86 94 dB
A
V
I

OUT

VOL
OUT

Large-Signal Voltage Gain V

= ±10V, RL = 500Ω ● 20 50 V/mV

OUT

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

= ±12V ● 24 26 mA

OUT

SR Slew Rate (Note 5) ● 180 250 V/µs
I

S

Supply Current ● 811 mA

The ● denotes the specifications which apply over the temperature range –55°C ≤ TA ≤ 125°C, otherwise specifications are at
TA = 25°C. VS = ±15V, VCM = 0V, unless otherwise specified.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

OS

I

B

CMRR Common Mode Rejection Ratio VCM = ±12V ● 92 114 dB
PSRR Power Supply Rejection Ratio VS = ±5V to ±15V ● 82 94 dB
A

VOL

V

OUT

I

OUT

SR Slew Rate (Note 5) ● 130 250 V/µs
I

S

Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.

Note 2: A heat sink may be required when the output is shorted indefinitely.
Note 3: 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.
Consult factory.

Input Offset Voltage (Note 4) ● 0.5 4 mV
Input VOS Drift ● 20 µV/°C
Input Offset Current ● 100 800 nA
Input Bias Current ● 100 1000 nA

Large-Signal Voltage Gain V

= ±10V, RL = 500Ω ● 550 V/mV

OUT

Output Swing RL = 500Ω ● 10 13 ±V

RL = 1k ● 12 13 ±V

Output Current V

= ±10V ● 20 26 mA

OUT

= ±12V ● 12 13 mA

V

OUT

Supply Current ● 811 mA

Note 4: Input offset voltage is pulse tested and is exclusive of warm-up drift.
Note 5: Slew rate is measured between ±10V on an output swing of ±12V.
Note 6: FPBW = SR/2πV

.

P

Note 7: Differential Gain and Phase are tested in AV = 2 with five amps in
series. Attenuators of 1/2 are used as loads (75Ω, 75Ω and 499Ω, 499Ω).

3

LT1220

FREQUENCY (Hz)

100

0

POWER SUPPLY REJECTION RATIO (dB)

20

60

100

1k 100k 1M 100M

LT1220 • TPC09

40

80

10k 10M

+PSRR

VS = ±15V
T

A

= 25°C

–PSRR

W

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TYPICAL PERFORMANCE CHARACTERISTICS

Input Common Mode Range
vs Supply Voltage

20

TA = 25°C

= 0.5mV

∆V

OS

15

10

5

MAGNITUDE OF INPUT VOLTAGE (V)

0

0

5101520

SUPPLY VOLTAGE (±V)

+V

–V

Output Voltage Swing
vs Resistive Load

30

TA = 25°C

= 30mV

∆V

)

P-P

OUTPUT VOLTAGE SWING (V

OS

25

20

±15V SUPPLIES

15

10

5

0

10

LOAD RESISTANCE (Ω)

±5V SUPPLIES

100 1k 10k

CM

CM

LT1220 • TPC01

LT1220 • TPC04

Supply Current vs Supply Voltage
and Temperature

9.0
TA = 25°C

8.5

8.0

SUPPLY CURRENT (mA)

7.5

7.0

0

5101520

SUPPLY VOLTAGE (±V)

Input Bias Current
vs Input Common Mode Voltage

500

TA = 25°C

400

= ±15V

V

S

300
200
100

0
–100
–200

INPUT BIAS CURRENT (nA)

–300
–400
–500

–10 –5 10

–15

INPUT COMMON MODE VOLTAGE (V)

+

I

B

–

I

B

05 15

LT1220 • TPC02

LT1220 • TPC05

Output Voltage Swing
vs Supply Voltage

20

TA = 25°C
R

= 500Ω

L

∆V

= 30mV

OS

15

+V

10

–V

SW

5

MAGNITUDE OF OUTPUT VOLATGE (V)

0

0

5101520

SUPPLY VOLTAGE (±V)

Open-Loop Gain
vs Resistive Load

110

TA = 25°C

100

VS = ±15V

90

80

OPEN-LOOP GAIN (dB)

70

60

10

100 1k 10k

LOAD RESISTANCE (Ω)

SW

LT1220 • TPC03

VS = ±5V

LT1220 • TPC06

Output Short-Circuit Current
vs Temperature

50

VS = ±5V

45

40

35

30

25

OUTPUT SHORT-CIRCUIT CURRENT (mA)

20

–50

4

025 75

–25 50 100 125

TEMPERATURE (°C)

LT1220 • TPC07

Input Noise Spectral Density

160

VS = ±15V
T

= 25°C

140

A

= 100

A

V

√

120

100

80

60

40

INPUT VOLTAGE NOISE (nV/ Hz)

20

0

10

100 1k 10k 100k

FREQUENCY (Hz)

Power Supply Rejection Ratio
vs Frequency

LT1220 • TPC08