Linear Technology LT1217 Datasheet

LT1217

FREQUENCY (Hz)

100k

–20

AMPLIFIER VOLTAGE GAIN (dB)

10

40

50

60

1M 10M 100M

LT1217 • TA02

–10

0

20

30

RG = 30Ω

RG = 100Ω

RG = 330Ω

RG = 1.3k

RG = ∞

VS = ±15V
R

F

= 3k

R

L

= 100Ω

Low Power 10MHz

Current Feedback Amplifier

EATU

F

■

1mA Quiescent Current

■

50mA Output Current (Minimum)

■

10MHz Bandwidth

■

500V/µs Slew Rate

■

280ns Settling Time to 0.1%

■

Wide Supply Range, ±5V to ±15V

■

1mV Input Offset Voltage

■

100nA Input Bias Current

■

100MΩ Input Resistance

PPLICATI

A

■

Video Amplifiers

■

Buffers

■

IF and RF Amplification

■

Cable Drivers

■

8, 10, 12-Bit Data Acquisition Systems

RE

S

O

U
S

DUESCRIPTIO

The LT1217 is a 10MHz current feedback amplifier with DC
characteristics better than many voltage feedback ampli­fiers. This versatile amplifier is fast, 280ns settling to 0.1%
for a 10V step thanks to its 500V/µs slew rate. The LT1217
is manufactured on Linear Technology’s proprietary
complementary bipolar process resulting in a low 1mA
quiescent current. To reduce power dissipation further,
the LT1217 can be turned off, eliminating the load current
and dropping the supply current to 350µA.

The LT1217 is excellent for driving cables and other low
impedance loads thanks to a minimum output drive cur­rent of 50mA. Operating on any supplies from ±5V to ±15V
allows the LT1217 to be used in almost any system. Like
other current feedback amplifiers, the LT1217 has high
gain bandwidth at high gains. The bandwidth is over 1MHz
at a gain of 100.

The LT1217 comes in the industry standard pinout and
can upgrade the performance of many older products.

CA

A

PPLICATITYPI

L

V

+

IN

LT1217

–

R
3k

RG
3k



R

F

AV = 1 +

R

G

AT AMPLIFIER OUTPUT.
6dB LESS AT V

U

O

Cable Driver Voltage Gain vs Frequency

75Ω



F

.

OUT

75Ω
CABLE

75Ω

LT1217 • TA01

V

OUT

1

LT1217

WU

U

PACKAGE

/

O

RDER I FOR ATIO

W

O

A

LUTEXI T

S

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

Input Current ...................................................... ±10mA

Input Voltage ............................ Equal to Supply Voltage

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

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

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

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

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

LECTRICAL C CHARA TERIST

E

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

V

OS

I

IN+

I

IN–

e

n

i

n

R

IN

C

IN

CMRR Common Mode Rejection Ratio V

PSRR Power Supply Rejection Ratio VS = ±4.5V to ±18V ● 68 76 dB

A

V

R

OL

V

OUT

I

OUT

SR Slew Rate (Note 2, 3) RF = 3k, RG = 3k ● 100 500 V/µs
BW Bandwidth RF = 3k, RG = 3k, V
t

r

t

PD

t

s

I

S

Input Offset Voltage V
Non-Inverting Input Current V
Inverting Input Current V
Input Noise Voltage Density f = 1kHz, RF = 1k, RG = 10Ω 6.5 nV/√Hz
Input Noise Current Density f = 1kHz, RF = 1k, RG = 10Ω 0.7 pA/√Hz
Input Resistance V
Input Capacitance 1.5 pF
Input Voltage Range ● ±10 ±12 V

Inverting Input Current Common Mode Rejection V

Non-Inverting Input Current Power Supply Rejection VS = ±4.5V to ±18V ● 2 20 nA/V
Inverting Input Current Power Supply Rejection VS = ±4.5V to ±18V ● 10 50 nA/V
Large Signal Voltage Gain R

Transresistance, ∆V

Output Swing R

Output Current R

Rise Time, Fall Time (Note 3) RF = 3k, RG = 3k, V
Propagation Delay RF = 3k, RG = 3k, V
Overshoot RF = 3k, RG = 3k, V
Settling Time, 0.1% RF = 3k, RG = 3k, V
Supply Current VIN = 0V ● 12 mA
Supply Current, Shutdown Pin 8 Current = 50µA ● 350 1000 µA

A

OUT

/∆I

WUW

IN–

ARB

U
G

S

I

TOP VIEW

1NULL
2

–IN
+IN

3

–

V

N8 PACKAGE

8-LEAD PLASTIC DIP

ICS

VS = ±15V, TA = 0°C to 70°C unless otherwise noted.

= 0V ● ±1 ±3mV

CM

= 0V ● ±100 ±500 nA

CM

= 0V ● ±100 ±500 nA

CM

= ±10V ● 20 100 MΩ

IN

= ±10V ● 60 66 dB

CM

= ±10V ● 5 20 nA/V

CM

= 2k, V

LOAD

= 400Ω, V

R

LOAD

R

= 2k, V

LOAD

= 400Ω, V

R

LOAD

= 2k ● ±12 ±13 V

LOAD

= 200Ω ● ±10 V

R

LOAD

= 0Ω ● 50 100 mA

LOAD

= ±10V ● 90 105 dB

OUT

= ±10V ● 70 dB

OUT

= ±10V ● 545 MΩ

OUT

= ±10V ● 1.5 MΩ

OUT

= 100mV 10 MHz

OUT

= 1V ● 30 40 ns

OUT

= 1V 25 ns

OUT

= 1V 5 %

OUT

= 10V 280 ns

OUT

8
7
6
54

S8 PACKAGE

8-LEAD PLASTIC SOIC

SHUTDOWN

+

V
OUT
NULL

LT1217 • POI01

ORDER PART

NUMBER

LT1217CN8
LT1217CS8

S8 PART MARKING

1217

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

Note 1: A heat sink may be required.

2

Note 2: Non-Inverting operation, V
Note 3: AC parameters are 100% tested on the plastic DIP packaged parts

(N suffix), and are sample tested on every lot of the SO packaged parts
(S suffix).

= ±10V, measured at ±5V.

OUT

UW

SUPPLY VOLTAGE (±V)

0

0

–3dB BANDWIDTH (MHz)

0.5

1.0

1.5

2.0

2.5

4 8 14 18

LT1217 • TPC09

2 6 10 12 16

RF = 250Ω

RF = 5.1k

RF = 1k

SUPPLY VOLTAGE (±V)

0

0

–3dB BANDWIDTH (MHz)

5

10

15

20

25

30

4 8 14 18

LT1217 • TPC03

2 6 10 12 16

RF = 1k

RF = 2k

RF = 3k

RF = 5.1k

PEAKING ≤ 0.5dB
PEAKING ≤ 5dB

SUPPLY VOLTAGE (±V)

0

0

–3dB BANDWIDTH (MHz)

4

6

12

16

18

20

4 8 14 18

LT1217 • TPC06

2 6 10 12 16

RF = 5.1k

14

10

8

2

PEAKING ≤ 0.5dB
PEAKING ≤ 5dB

RF = 2k

RF = 3k

RF = 1k

R

F

= 750Ω

Y

PICA

8
7

6
5
4
3
2
1

VOLTAGE GAIN (dB)

0
–1
–2

0.01

22
21

20
19
18
17
16
15

VOLTAGE GAIN (dB)

14
13
12

0.01

LPER

F

O

R

AT

CCHARA TERIST

E

C

ICS

Voltage Gain and Phase vs –3dB Bandwidth vs Supply –3dB Bandwidth vs Supply
Frequency, Gain = 6dB Voltage, Gain = 2, RL = 100Ω Voltage, Gain = 2, RL = 1kΩ

PHASE

GAIN

VS = ±15V

= 100Ω

R

L

R

= 3k

F

0.1 1.0 10

FREQUENCY (MHz)

0
45

90
135
180

225

LT1217 • TPC01

30

25

PHASE SHIFT (DEGREES)

20

15

10

–3dB BANDWIDTH (MHz)

5

0

2 6 10 12 16

0

PEAKING ≤ 0.5dB
PEAKING ≤ 5dB

RF = 1k

RF = 2k

RF = 3k

RF = 5.1k

4 8 14 18

SUPPLY VOLTAGE (±V)

LT1217 • TPC02

Voltage Gain and Phase vs –3dB Bandwidth vs Supply –3dB Bandwidth vs Supply
Frequency, Gain = 20dB Voltage, Gain = 10, RL = 100Ω Voltage, Gain = 10, RL = 1kΩ

PHASE

GAIN

VS = ±15V

= 100Ω

R

L

R

= 3k

F

0.1 1.0 10

FREQUENCY (MHz)

0
45

90
135
180

225

LT1217 • TPC04

20
18
16

PHASE SHIFT (DEGREES)

14
12

10

8
6

–3dB BANDWIDTH (MHz)

4
2
0

2 6 10 12 16

0

PEAKING ≤ 0.5dB
PEAKING ≤ 5dB

= 750Ω

R

F

RF = 1k

RF = 2k

RF = 3k

RF = 5.1k

4 8 14 18

SUPPLY VOLTAGE (±V)

LT1217 • TPC05

LT1217

Voltage Gain and Phase vs –3dB Bandwidth vs Supply –3dB Bandwidth vs Supply
Frequency, Gain = 40dB Voltage, Gain = 100, RL = 100Ω Voltage, Gain = 100, RL = 1kΩ

42
41

40
39
38
37
36
35

VOLTAGE GAIN (dB)

34
33
32

0.01

PHASE

GAIN

VS = ±15V
R

L

R

= 3k

F

= 100Ω

0.1 1.0 10

FREQUENCY (MHz)

LT1217 • TPC07

0
45

90
135
180

225

2.5

2.0

PHASE SHIFT (DEGREES)

1.5

1.0

–3dB BANDWIDTH (MHz)

0.5

RF = 250Ω

RF = 1k

RF = 5.1k

0

2 6 10 12 16

4 8 14 18

0

SUPPLY VOLTAGE (±V)

LT1217 • TPC08

3