ANALOG DEVICES LT 1210 CT7 Datasheet

FEATURES

LT1210

1.1A, 35MHz Current
Feedback Amplifier

U

DESCRIPTIO

■

1.1A Minimum Output Drive Current

■

35MHz Bandwidth, AV = 2, RL = 10

■

900V/µs Slew Rate, AV = 2, RL = 10

■

High Input Impedance: 10MΩ

■

Wide Supply Range: ± 5V to ±15V

Ω

Ω

(TO-220 and DD Packages)

■

Enhanced θJA SO-16 Package for ± 5V Operation

■

Shutdown Mode: IS < 200µA

■

Adjustable Supply Current

■

Stable with CL = 10,000pF

■

Available in 7-Lead DD, TO-220 and
16-Lead SO Packages

U

APPLICATIO S

■

Cable Drivers

■

Buffers

■

Test Equipment Amplifiers

■

Video Amplifiers

■

ADSL Drivers

The LT®1210 is a current feedback amplifier with high
output current and excellent large-signal characteristics.
The combination of high slew rate, 1.1A output drive and
±15V operation enables the device to deliver significant
power at frequencies in the 1MHz to 2MHz range. Short­circuit protection and thermal shutdown ensure the
device’s ruggedness. The LT1210 is stable with large
capacitive loads, and can easily supply the large currents
required by the capacitive loading. A shutdown feature
switches the device into a high impedance and low
supply current mode, reducing dissipation when the
device is not in use. For lower bandwidth applications,
the supply current can be reduced with a single external
resistor.

The LT1210 is available in the TO-220 and DD packages
for operation with supplies up to ±15V. For ± 5V applica­tions the device is also available in a low thermal resis­tance SO-16 package.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

Twisted Pair Driver

15V

+

4.7µF*

V

IN

+

LT1210

–

4.7µF*

+

–15V

SD

100nF

100nF

R

11Ω

2.5W

845Ω

274Ω

T

U

T1**

31

* TANTALUM
** MIDCOM 671-7783 OR EQUIVALENT

R
100Ω

2.5W

1210 TA01

Total Harmonic Distortion vs Frequency

–50

VS = ±15V

= 20V

V

OUT

AV = 4

–60

–70

L

RL = 12.5Ω

RL = 10Ω

–80

RL = 50Ω

–90

TOTAL HARMONIC DISTORTION (dB)

–100

1k

P-P

10k 100k 1M

FREQUENCY (Hz)

1210 TA02

1210fa

1

LT1210

A

W

O

LUTEXI TIS

S

A

WUW

U

(Note 1)

ARB

G

Supply Voltage ..................................................... ± 18V

Input Current .................................................... ±15mA

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

Specified Temperature Range (Note 3) ...... 0°C to 70°C

U

W

PACKAGE/ORDER INFORMATION

TOP VIEW

+

1

V

+

2

FRONT VIEW

7
6
5
4

TAB

IS V

3
2

+

1

R PACKAGE

7-LEAD PLASTIC DD

θJA ≈ 25°C/W

OUT

–

V
COMP

+

V
SHUTDOWN
+IN
–IN

V

3

OUT

+

4

V

5

NC

6

–IN

7

NC

+

8

V

16-LEAD PLASTIC SO

θJA ≈ 40°C/W (Note 3)

S PACKAGE

Operating Temperature Range ............... –40°C to 85°C

Junction Temperature......................................... 150°C

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

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

U

+

16

V

15

NC

14

V

13

COMP

12

SHUTDOWN

11

+IN

10

NC

9

V

–

+

TAB

IS V

FRONT VIEW

+

T7 PACKAGE

7-LEAD TO-220

7
6
5
4
3
2
1

θJC = 5°C/W

OUT

–

V

COMP

+

V

SHUTDOWN

+IN

–IN

ORDER PART NUMBER ORDER PART NUMBER

LT1210CR

ORDER PART NUMBER

LT1210CS

LT1210CT7

Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

The ● denotes specifications which apply over the full operating

= 25°C. VCM = 0V, ± 5V ≤ VS ≤ ± 15V, pulse tested, VSD = 0V, unless

A

otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

I

I

e

+i

–i

R

C

OS

+

IN

–

IN

n

n

n

IN

IN

Input Offset Voltage TA = 25°C ±3 ±15 mV

Input Offset Voltage Drift

●

●

10 µV/°C

± 20 mV

Noninverting Input Current TA = 25°C ±2 ±5 µA

●

± 20 µA

Inverting Input Current TA = 25°C ±10 ± 60 µA

●

±100 µA

Input Noise Voltage Density f = 10kHz, RF = 1k, RG = 10Ω, RS = 0Ω 3.0 nV/√Hz

Input Noise Current Density f = 10kHz, RF = 1k, RG = 10Ω, RS = 10k 2.0 pA/√Hz

Input Noise Current Density f = 10kHz, RF = 1k, RG = 10Ω, RS = 10k 40 pA/√Hz

Input Resistance VIN = ±12V, VS = ± 15V

VIN = ±2V, VS = ±5V

●

1.50 10 MΩ

●

0.25 5 MΩ

Input Capacitance VS = ± 15V 2 pF

Input Voltage Range VS = ± 15V

= ± 5V

V

S

●

±12 ± 13.5 V

●

±2 ±3.5 V

1210fa

2

LT1210

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifications are at T

The ● denotes specifications which apply over the full operating

= 25°C. VCM = 0V, ± 5V ≤ VS ≤ ± 15V, pulse tested, VSD = 0V, unless

A

otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

CMRR Common Mode Rejection Ratio VS = ± 15V, VCM = ± 12V

= ± 5V, VCM = ±2V

V

S

Inverting Input Current VS = ± 15V, VCM = ± 12V
Common Mode Rejection V

= ± 5V, VCM = ±2V

S

PSRR Power Supply Rejection Ratio VS = ± 5V to ±15V

Noninverting Input Current VS = ± 5V to ±15V
Power Supply Rejection

Inverting Input Current VS = ± 5V to ±15V
Power Supply Rejection

A

V

R

OL

V

OUT

Large-Signal Voltage Gain TA = 25°C, VS = ±15V, V

R

= 10Ω (Note 3)

L

Transresistance, ∆V

OUT

/∆I

VS = ± 15V, V

VS = ± 5V, V

–

IN

TA = 25°C, VS = ±15V, V
R

= 10Ω (Note 3) 100 260 kΩ

L

VS = ± 15V, V

VS = ± 5V, V

= ±8.5V, RL = 10Ω (Note 3)

OUT

= ± 2V, RL = 10Ω

OUT

= ±8.5V, RL = 10Ω (Note 3)

OUT

= ± 2V, RL = 10Ω

OUT

= ± 10V, 55 71 dB

OUT

= ± 10V,

OUT

Maximum Output Voltage Swing TA = 25°C, VS = ±15V, RL = 10Ω (Note 3) ±10.0 ± 11.5 V

TA = 25°C, VS = ±5V, RL = 10Ω ± 2.5 ± 3.0 V

I

I

OUT

S

Maximum Output Current (Note 4) VS = ± 15V, RL = 1Ω

Supply Current (Note 4) TA = 25°C, VS = ± 15V, VSD = 0V 35 50 mA

Supply Current, RSD = 51k (Notes 4, 5) TA = 25°C, VS = ± 15V 15 30 mA

Positive Supply Current, Shutdown VS = ± 15V, VSD = 15V

Output Leakage Current, Shutdown VS = ± 15V, VSD = 15V

SR Slew Rate (Note 6) TA = 25°C, AV = 2, RL = 400Ω 400 900 V/µs

Slew Rate (Note 4) T

= 25°C, AV = 2, RL = 10Ω 900 V/µs

A

Differential Gain (Notes 4, 7) VS = ± 15V, RF = 750Ω, RG = 750Ω, RL = 15Ω 0.3 %

Differential Phase (Notes 4, 7) VS = ± 15V, RF = 750Ω, RG = 750Ω, RL = 15Ω 0.1 DEG

BW Small-Signal Bandwidth AV = 2, VS = ± 15V, Peaking ≤ 1dB, 55 MHz

= RG = 680Ω, RL = 100Ω

R

F

AV = 2, VS = ± 15V, Peaking ≤ 1dB, 35 MHz

= RG = 576Ω, RL = 10Ω

R

F

●

55 62 dB

●

50 60 dB

●

●

●

60 77 dB

●

●

●

55 68 dB

●

55 68 dB

●

75 200 kΩ

●

75 200 kΩ

●

± 8.5 V

●

± 2.0 V

●

1.1 2.0 A

●

●

●

0.1 10 µA/V

0.1 10 µA/V

30 500 nA/V

0.7 5 µA/V

65 mA

200 µA

10 µA

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: Applies to short circuits to ground only. A short circuit between
the output and either supply may permanently damage the part when
operated on supplies greater than ±10V.

Note 3: Commercial grade parts are designed to operate over the
temperature range of – 40°C ≤ T
guaranteed beyond 0°C ≤ T
–40°C ≤ T

≤ 85°C are available on special request. Consult factory.

A

≤ 85°C, but are neither tested nor

A

≤ 70°C. Industrial grade parts tested over

A

Note 4: SO package is recommended for ±5V supplies only, as the power
dissipation of the SO package limits performance on higher supplies. For
supply voltages greater than ±5V, use the TO-220 or DD package. See
“Thermal Considerations” in the Applications Information section for
details on calculating junction temperature. If the maximum dissipation of
the package is exceeded, the device will go into thermal shutdown.

Note 5: R

is connected between the Shutdown pin and ground.

SD

Note 6: Slew rate is measured at ±5V on a ± 10V output signal while
operating on ±15V supplies with R

= 1.5k, RG = 1.5k and RL = 400Ω.

F

Note 7: NTSC composite video with an output level of 2V.

1210fa

3

LT1210

W

UU

SMALL-SIGNAL BANDWIDTH

RSD = 0Ω, IS = 30mA, VS = ± 5V, Peaking ≤ 1dB

A

V

– 1 150 549 549 52.5

1 150 604 – 53.5

2 150 562 562 51.8

10 150 392 43.2 48.4

RSD = 7.5k, IS = 15mA, VS = ± 5V, Peaking ≤ 1dB

A

V

– 1 150 562 562 39.7

1 150 634 – 41.9

2 150 576 576 40.2

10 150 324 35.7 39.5

R

L

30 590 590 39.7
10 619 619 26.5

30 649 – 39.7
10 619 – 27.4

30 590 590 38.8
10 576 576 27.4

30 383 42.2 40.3
10 215 23.7 36.0

R

L

30 619 619 28.9
10 604 604 20.5

30 681 – 29.7
10 649 – 20.7

30 604 604 29.6
10 576 576 21.6

30 324 35.7 32.3
10 210 23.2 27.7

R

F

R

F

R

G

R

G

–3dB BW

(MHz)

–3dB BW

(MHz)

RSD = 0Ω, IS = 35mA, VS = ± 15V, Peaking ≤ 1dB

A

V

– 1 150 604 604 66.2

1 150 750 – 56.8

2 150 665 665 52.5

10 150 453 49.9 61.5

R

L

30 649 649 48.4
10 665 665 46.5

30 866 – 35.4
10 845 – 24.7

30 715 715 38.9
10 576 576 35.0

30 432 47.5 43.1
10 221 24.3 45.5

R

F

R

G

RSD = 47.5k, IS = 18mA, VS = ± 15V, Peaking ≤ 1dB

A

V

– 1 150 619 619 47.8

1 150 732 – 51.4

2 150 634 634 48.4

10 150 348 38.3 46.8

R

L

30 698 698 32.3
10 698 698 22.2

30 806 – 33.9
10 768 – 22.5

30 698 698 33.0
10 681 681 22.5

30 357 39.2 36.7
10 205 22.6 31.3

R

F

R

G

–3dB BW

(MHz)

–3dB BW

(MHz)

RSD = 15k, IS = 7.5mA, VS = ± 5V, Peaking ≤ 1dB

A

V

– 1 150 536 536 28.2

1 150 619 – 28.6

2 150 536 536 28.3

10 150 150 16.5 31.5

R

L

30 549 549 20.0
10 464 464 15.0

30 634 – 19.8
10 511 – 14.9

30 549 549 19.9
10 412 412 15.7

30 118 13.0 27.1
10 100 11.0 19.4

R

F

R

G

4

–3dB BW

(MHz)

RSD = 82.5k, IS = 9mA, VS = ± 15V, Peaking ≤ 1dB

A

V

– 1 150 590 590 34.8

1 150 715 – 35.5

2 150 590 590 35.3

10 150 182 20.0 37.2

R

L

30 649 649 22.5
10 576 576 16.3

30 768 – 22.5
10 649 – 16.1

30 665 665 22.5
10 549 549 16.8

30 182 20.0 28.9
10 100 11.0 22.5

R

F

R

G

–3dB BW

(MHz)

1210fa

WU

CAPACITIVE LOAD (pF)

100

FEEDBACK RESISTANCE (Ω)

1k

10k

100101 10000

1210 G03

1000

BANDWIDTH

FEEDBACK RESISTANCE

A

V

= 2

R

L

=

∞

VS = ±15V
C

COMP

= 0.01µF

1

10

100

–3dB BANDWIDTH (MHz)

TYPICAL PERFOR A CE CHARACTERISTICS

Bandwidth vs Supply Voltage

100

90

80

70

60

50

40

30

– 3dB BANDWIDTH (MHz)

20

10

0

PEAKING ≤ 1dB
PEAKING ≤ 5dB

RF = 470Ω

4

610

8

SUPPLY VOLTAGE (±V)

RF = 680Ω

12

Bandwidth vs Supply Voltage

100

90

80

70

60

50

40

30

–3dB BANDWIDTH (MHz)

20

10

0

PEAKING ≤ 1dB
PEAKING ≤ 5dB

RF =390Ω

4

610

8

SUPPLY VOLTAGE (±V)

12

AV = 2
R

RF = 560Ω

RF = 750Ω

RF = 1.5k

14

AV = 10
R

RF = 330Ω

RF = 470Ω

RF = 680Ω

RF = 1.5k

14

= 100Ω

L

RF = 1k

16

= 100Ω

L

16

1210 G04

18

1210 G01

18

Bandwidth vs Supply Voltage

50

40

30

20

–3dB BANDWIDTH (MHz)

10

0

PEAKING ≤ 1dB
PEAKING ≤ 5dB

4

610

8

SUPPLY VOLTAGE (±V)

RF = 560Ω

RF = 750Ω

RF = 1k

RF = 2k

12

Bandwidth vs Supply Voltage

50

PEAKING ≤ 1dB

40

30

20

– 3dB BANDWIDTH (MHz)

10

0

4

RF = 680Ω

610

8

SUPPLY VOLTAGE (±V)

12

AV = 2
R

L

14

AV = 10

= 10Ω

R

L

RF = 560Ω

RF = 1k

RF = 1.5k

14

= 10Ω

16

1210 G02

16

1210 G05

LT1210

Bandwidth and Feedback Resistance
vs Capacitive Load for Peaking ≤ 1dB

18

Bandwidth and Feedback Resistance
vs Capacitive Load for Peaking ≤ 5dB

10k

BANDWIDTH

1k

FEEDBACK

RESISTANCE

AV = +2

FEEDBACK RESISTANCE (Ω)

=

∞

R

L

VS = ±15V

= 0.01µF

C

COMP

0100

0

18

1

10 100 1000 10000

CAPACITIVE LOAD (pF)

100

–3dB BANDWIDTH (MHz)

10

1

1210 G06

Differential Phase vs
Supply Voltage

0.6

0.5

0.4

RF = RG = 750Ω

= 2

A

V

0.3

0.2

DIFFERENTIAL PHASE (DEG)

0.1

0

7

5

9

SUPPLY VOLTAGE (±V)

RL = 15Ω

RL = 50Ω

RL = 10Ω

RL = 30Ω

11

13

1210 G07

0.5

0.4

0.3

0.2

DIFFERENTIAL GAIN (%)

0.1

15

Differential Gain vs
Supply Voltage

RL = 10Ω

RL = 15Ω

RL = 50Ω

0

7

5

9

SUPPLY VOLTAGE (±V)

RF = RG = 750Ω

= 2

A

V

RL = 30Ω

11

13

1210 G08

Spot Noise Voltage and Current
vs Frequency

100

–i

n

10

e

n

SPOT NOISE (nV/√Hz OR pA/√Hz)

15

1

10

100 100k

1k 10k

FREQUENCY (Hz)

+i

n

1210 G09

1210fa

5