LT1497CS8#PBF Datasheet LT1497CS8#PBF, LT1497CS#PBF, LT1497CS8#TRPBF | P1-P3

1

LT1497

Dual 125mA, 50MHz

Current Feedback Amplifier

–

+

–

+

560Ω

V

IN

68.1Ω

1:1*

135Ω

560Ω

1/2 LT1497

*MIDCOM 671-7807

1419 TA01

2nd and 3rd Harmonic Distortion of

HDSL2 Single Pair Line Driver

FREQUENCY (Hz)

100k

–90

DISTORTION (dBc)

–80

–70

–60

–50

1M 2M

1497 TA02

–40

V

S

= ±5V

V

IN

= ±1.25V

V

OUT

= ±2.5V

3RD

2ND

HDSL2 Single Pair Line Driver

■

Minimum Output Current:

±

125mA

■

Maximum Supply Current per Amp: 7mA, V

S

=

±

5V

■

Bandwidth: 50MHz, V

S

=

±

15V

■

Slew Rate: 900V/µs, V

S

= ±15V

■

Wide Supply Range: V

S

= ±2.5V to ±15V

(Enhanced θ

JA

16-Pin SO Package)

■

Enhanced θ

JA

SO-8 Package for ±5V Operation

■

0.02% Differential Gain: A

V

= 2, R

L

= 150Ω

■

0.015° Differential Phase: A

V

= 2, R

L

= 150Ω

■

±13V Output Swing: I

L

= 100mA, V

S

= ±15V

■

±3.1V Output Swing: I

L

= 100mA, V

S

= ±5V

■

55ns Settling Time to 0.1%, 10V Step

■

Thermal Shutdown Protection

FEATURES

DESCRIPTION

U

The LT

®

1497 dual current feedback amplifier features low

power, high output drive, excellent video characteristics

and outstanding distortion performance. From a low 7mA

maximum supply current per amplifier, the LT1497 drives

±100mA with only 1.9V of headroom. Twisted pairs can be

driven differentially with – 70dBc distortion up to 1MHz for

±40mA peak signals.

The LT1497 is available in a low thermal resistance 16-pin

SO package for operation with supplies up to ±15V. For

±5V operation the device is also available in a low thermal

resistance SO-8 package. The device has thermal and

current limit circuits that protect against fault conditions.

The LT1497 is manufactured on Linear Technology’s

complementary bipolar process. The device has charac-

teristics that bridge the performance between the LT1229

and LT1207 dual current feedback amplifiers. The LT1229

has 30mA output drive, 100MHz bandwidth and 12mA

supply current. The LT1207 has 250mA output drive,

60MHz bandwidth and 40mA supply current.

, LTC and LT are registered trademarks of Linear Technology Corporation.

APPLICATIONS

U

■

Twisted-Pair Drivers

■

Video Amplifiers

■

Cable Drivers

■

Test Equipment Amplifiers

■

Buffers

TYPICAL APPLICATION

U

2

LT1497

ABSOLUTE MAXIMUM RATINGS

W

WW

U

Total Supply Voltage (V

+

to V

–

)

LT1497CS8.......................................................... 14V

LT1497CS............................................................ 36V

Noninverting Input Current ................................... ±2mA

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

Operating Temperature Range (Note 2) ... –40°C to 85°C

Specified Temperature Range ...................... 0°C to 70°C

Maximum Junction Temperature (See Below) .......150°C

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

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

PACKAGE/ORDER INFORMATION

W

U

T

JMAX

= 150°C, θ

JA

= 40°C/ W (NOTE 3)

ORDER PART

NUMBER

ORDER PART

NUMBER

S8 PART MARKING

1497

LT1497CS8

T

JMAX

= 150°C, θ

JA

= 80°C/ W (NOTE 3)

1

2

3

4

8

7

6

5

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

OUT A 

–IN A

+IN A

V

–

V

+



OUT B

–IN B

+IN B

A

B

LT1497CS

Consult factory for Industrial and Military grade parts.

TOP VIEW

S PACKAGE

16-LEAD PLASTIC SO



1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

V

–



NC

OUT A

–IN A

+IN A

V

–



NC

V

–

V

–



NC 

V

+



OUT B

–IN B

+IN B

NC

V

–

A

B

ELECTRICAL CHARACTERISTICS

V

CM

= 0V, ±2.5V ≤ V

S

≤ ±15V (LT1497CS), ±2.5V ≤ V

S

≤ ±5V (LT1497CS8), pulse tested unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

Input Offset Voltage T

A

= 25°C ±3 ±10 mV

● ±15 mV

Input Offset Voltage Matching T

A

= 25°C ±1 ±3.5 mV

● ±5.0 mV

Input Offset Voltage Drift ● 10 µV/°C

I

IN

+

Noninverting Input Current T

A

= 25°C ±1 ±3 µA

● ±10 µA

Noninverting Input Current Matching T

A

= 25°C ±0.3 ±1.0 µA

● ±1.5 µA

I

IN

–

Inverting Input Current T

A

= 25°C ±7 ±20 µA

● ±40 µA

Inverting Input Current Matching T

A

= 25°C ±3 ±10 µA

● ±15 µA

e

n

Input Noise Voltage Density f = 1kHz, R

F

= 1k, R

G

= 10Ω, R

S

= 0Ω 3 nV/√Hz

+i

n

Noninverting Input Noise Current Density f = 1kHz, R

F

= 1k, R

G

= 10Ω, R

S

= 10k 2 pA/√Hz

–i

n

Inverting Input Noise Current Density f = 1kHz, R

F

= 1k, R

G

= 10Ω, R

S

= 10k 20 pA/√Hz

R

IN

Input Resistance V

IN

= ±13V, V

S

= ±15V ● 1.5 10 MΩ

V

IN

= ±3V, V

S

= ±5V ● 1.5 8 MΩ

V

IN

= ±0.5V, V

S

= ±2.5V ● 1.5 8 MΩ

C

IN

Input Capacitance 3pF

3

LT1497

ELECTRICAL CHARACTERISTICS

V

CM

= 0V, ±2.5V ≤ V

S

≤ ±15V (LT1497CS), ±2.5V ≤ V

S

≤ ±5V (LT1497CS8), pulse tested unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Voltage Range V

S

= ±15V ● ±13 ±14 V

V

S

= ±5V ● ±3.0 ±4.0 V

V

S

= ±2.5V ● ±0.5 ±1.5 V

CMRR Common Mode Rejection Ratio V

S

= ±15V, V

CM

= ±13V, T

A

= 25°C5562 dB

●53 dB

V

S

= ±5V, V

CM

= ±3V, T

A

= 25°C5460dB

●52 dB

V

S

= ±2.5V, V

CM

= ±0.5V, T

A

= 25°C5256 dB

●50 dB

Inverting Input Current V

S

= ±15V, V

CM

= ±13V ● 2.0 10 µA/V

Common Mode Rejection V

S

= ±5V, V

CM

= ±3V ● 2.5 10 µA/V

V

S

= ±2.5V, V

CM

= ±0.5V ● 3.0 10 µA/V

PSRR Power Supply Rejection Ratio V

S

= ±2V to ±15V, T

A

= 25°C6676dB

●63 dB

V

S

= ±2V to ±5V, T

A

= 25°C6676dB

●63 dB

Noninverting Input Current V

S

= ±2V to ±15V ● 5 50 nA/V

Power Supply Rejection V

S

= ±2V to ±5V ● 5 50 nA/V

Inverting Input Current V

S

= ±2V to ±15V ● 0.1 2 µA/V

Power Supply Rejection V

S

= ±2V to ±5V ● 0.1 2 µA/V

A

VOL

Large-Signal Voltage Gain V

S

= ±15V, V

OUT

= ±10V, R

L

= 150Ω ● 66 80 dB

V

S

= ±5V, V

OUT

= ±2.5V, R

L

= 50Ω ● 66 80 dB

V

S

= ±2.5V, V

OUT

= ±0.5V, R

L

= 50Ω ● 66 80 dB

R

OL

Transresistance, ∆V

OUT

/∆I

IN

–

V

S

= ±15V, V

OUT

= ±10V, R

L

= 150Ω ● 100 500 kΩ

V

S

= ±5V, V

OUT

= ±2.5V, R

L

= 50Ω ● 100 500 kΩ

V

S

= ±2.5V, V

OUT

= ±0.5V, R

L

= 50Ω ● 100 300 kΩ

V

OUT

Maximum Output Swing V

S

= ±15V, R

L

= 150Ω, T

A

= 25°C ±12.80 ±13.15 V

● ±12.60 V

V

S

= ±15V, I

L

= ±100mA, T

A

= 25°C ±12.65 ±13.0 V

● ±12.55 V

V

S

= ±5V, R

L

= 50Ω, T

A

= 25°C ±3.20 ±3.45 V

● ±3.10 V

V

S

= ±5V, I

L

= ±100mA, T

A

= 25°C ±2.75 ±3.10 V

● ±2.65 V

V

S

= ±2.5V, R

L

= 50Ω, T

A

= 25°C ±1.25 ±1.45 V

● ±1.15 V

V

S

= ±2.5V, I

L

= ±50mA, T

A

= 25°C ±1.00 ±1.15 V

● ±0.90 V

I

OUT

Maximum Output Current R

L

= 1Ω, V

S

= ±15V ● ±125 ±220 mA

R

L

= 1Ω, V

S

= ±5V ● ±125 ±220 mA

R

L

= 1Ω, V

S

= ±2.5V ±140 mA

I

S

Supply Current per Amplifier V

S

= ±2.5V to ±5V, T

A

= 25°C 6.0 7.0 mA

● 8.0 mA

V

S

= ±15V, T

A

= 25°C 7.0 9.0 mA

● 10.5 mA

Channel Separation V

S

= ±15V, V

OUT

= ±10V, R

L

= 150Ω ● 100 120 dB

V

S

= ±5V, V

OUT

= ±2.5V, R

L

= 50Ω ● 100 115 dB

LT1497CS8#PBF

LT1497CS8#PBF

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