LT1497 Linear Technology Corporation, LT1497 Datasheet

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LT1497

Manufacturer Part Number
LT1497
Description
Dual 125mA, 50MHz Current Feedback Amplifier
Manufacturer
Linear Technology Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1497CS
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1497CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIONS
FEATURES
TYPICAL
560
Minimum Output Current: 125mA
Maximum Supply Current per Amp: 7mA, V
Bandwidth: 50MHz, V
Slew Rate: 900V/ s, V
Wide Supply Range: V
Enhanced
0.02% Differential Gain: A
0.015 Differential Phase: A
55ns Settling Time to 0.1%, 10V Step
Thermal Shutdown Protection
(Enhanced
Twisted-Pair Drivers
Video Amplifiers
Cable Drivers
Test Equipment Amplifiers
Buffers
13V Output Swing: I
3.1V Output Swing: I
V
IN
1/2 LT1497
+
1/2 LT1497
+
JA
APPLICATION
560
560
560
JA
SO-8 Package for 5V Operation
HDSL2 Single Pair Line Driver
16-Pin SO Package)
U
68.1
68.1
L
S
S
S
L
= 100mA, V
= 15V
= 15V
= 2.5V to 15V
= 100mA, V
V
1:1*
= 2, R
V
*MIDCOM 671-7807
= 2, R
U
L
S
= 150
L
S
= 150
= 15V
= 5V
S
= 5V
1419 TA01
135
The LT
power, high output drive, excellent video characteristics
and outstanding distortion performance. From a low 7mA
maximum supply current per amplifier, the LT1497 drives
driven differentially with – 70dBc distortion up to 1MHz for
The LT1497 is available in a low thermal resistance 16-pin
SO package for operation with supplies up to 15V. For
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.
DESCRIPTION
100mA with only 1.9V of headroom. Twisted pairs can be
40mA peak signals.
5V operation the device is also available in a low thermal
, LTC and LT are registered trademarks of Linear Technology Corporation.
Current Feedback Amplifier
®
1497 dual current feedback amplifier features low
– 40
– 50
– 80
– 90
– 60
– 70
100k
2nd and 3rd Harmonic Distortion of
V
V
V
HDSL2 Single Pair Line Driver
S
IN
OUT
2ND
3RD
= 5V
= 1.25V
Dual 125mA, 50MHz
= 2.5V
U
FREQUENCY (Hz)
1M
1497 TA02
2M
LT1497
1

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LT1497 Summary of contents

Page 1

... 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. = 150 L The LT1497 is available in a low thermal resistance 16-pin = 150 L SO package for operation with supplies up to 15V. For = 15V S ...

Page 2

... NC 2 LT1497CS8 OUT A 3 – + – PART MARKING NC 7 – 1497 16-LEAD PLASTIC 150 C, JMAX 5V (LT1497CS8), pulse tested unless otherwise noted. S CONDITIONS 1kHz 1k, R ...

Page 3

... Power Supply Rejection A Large-Signal Voltage Gain VOL – R Transresistance OUT IN V Maximum Output Swing OUT I Maximum Output Current OUT I Supply Current per Amplifier S Channel Separation 5V (LT1497CS8), pulse tested unless otherwise noted. S CONDITIONS V = 15V 2. 15V 13V 5V, V ...

Page 4

... Note 2: The LT1497 is designed, characterized and expected to operate over the temperature range of – but is not tested at – and 85 C. Guaranteed industrial grade parts are available, consult factory. ...

Page 5

... PEAKING 1dB 45 80 PEAKING 5dB 90 70 135 60 180 R = 560 50 F 225 40 270 SUPPLY VOLTAGE ( V) LT1497 – 3dB BW (MHz 150 510 510 50 560 560 20 560 560 150 510 – 50 560 – 20 560 – 150 510 ...

Page 6

... LT1497 W U TYPICAL PERFORMANCE CHARACTERISTICS Differential Phase vs Supply Voltage 0 510 AMPLIFIER OUTPUT = 2V PEAK 0 0.3 L 0.2 0 150 SUPPLY VOLTAGE ( V) 1497 G07 Output Saturation Voltage vs Junction Temperature, 15V + 15V 75mA I = 50mA L – – 2 ...

Page 7

... 560 NEGATIVE POSITIVE 10k 100k 1M 10M 100M FREQUENCY (Hz) 1497 G23 LT1497 Spot Noise Voltage and Current vs Frequency 100 – 100 1k 10k 100k FREQUENCY (Hz) 1497 G18 3rd Order Intercept vs Frequency 15V ...

Page 8

... LT1497 U U APPLICATIONS INFORMATION The LT1497 is a dual current feedback amplifier with high output current drive capability. Bandwidth is maintained over a wide range of voltage gains by the appropriate choice of feedback resistor. These amplifiers will drive low impedance loads such as cables with excellent linearity at high frequencies ...

Page 9

... (1.24W)(40 C/ 135 C J The maximum junction temperature for the LT1497 is 150 C, so the heat sinking capability of the board is adequate for the application. If the copper area on the PC board is reduced to 180mm the thermal resistance increases to 61 C/W and the junc- tion temperature becomes ...

Page 10

... LT1497 U U APPLICATIONS INFORMATION the normally active emitter of Q2 will turn off as the entire current available from the current source is used to slew the base of Q3. The base driven by Q1 without slew limitation. When the differential input voltage exceeds two diode drops (about 1.4V) the extra clamp emitter on Q1 turns on and drives the base of Q3 directly ...

Page 11

... Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.004 – 0.010 (0.101 – 0.254) 0.228 – 0.244 (5.791 – 6.197) 0.050 (1.270) TYP LT1497 + 1/2 LT1497 – 560 560 + 3 1/2 LT1497 – 560 560 1497 TA04 0.189 – 0.197* (4.801 – 5.004 ...

Page 12

... U TYPICAL APPLICATION 4A Current Boosted Power Amp (A 15V 6 1/2 LT1497 200 – 1.8K + 1/2 LT1497 200 – – V 1.8k 6.2 – 15V RELATED PARTS PART NUMBER DESCRIPTION LT1206 Single 250mA, 60MHz Current Feedback Amplifier LT1207 Dual 250mA, 60MHz Current Feedback Amplifier LT1210 Single 1A, 30MHz Current Feedback Amplifier ...

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