LT6600IS8-20 Linear Technology, LT6600IS8-20 Datasheet

IC AMP DIFF LP FLTR 20MHZ 8-SOIC

LT6600IS8-20

Manufacturer Part Number
LT6600IS8-20
Description
IC AMP DIFF LP FLTR 20MHZ 8-SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LT6600IS8-20

Amplifier Type
Differential
Number Of Circuits
1
Output Type
Differential
Current - Input Bias
50µA
Voltage - Input Offset
10000µV
Current - Supply
46mA
Voltage - Supply, Single/dual (±)
3 V ~ 11 V, ±1.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output / Channel
-
-3db Bandwidth
-
Slew Rate
-
Gain Bandwidth Product
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT6600IS8-20
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT6600IS8-20#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIONS
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
FEATURES
n
n
n
n
n
n
n
n
n
n
n
n
n
V
IN
Programmable Differential Gain via Two External
Resistors
Adjustable Output Common Mode Voltage
Operates and Specifi ed with 3V, 5V, ±5V Supplies
0.5dB Ripple 4th Order Lowpass Filter with 20MHz
Cutoff
76dB S/N with 3V Supply and 2V
Low Distortion, 2V
Fully Differential Inputs and Outputs
SO-8 Package
Compatible with Popular Differential Amplifi er
Pinouts
High Speed ADC Antialiasing and DAC Smoothing in
Networking or Cellular Base Station Applications
High Speed Test and Measurement Equipment
Medical Imaging
Drop-in Replacement for Differential Amplifi ers
0.01μF
2.5MHz: 83dBc 2nd, 88dBc 3rd
20MHz: 63dBc 2nd, 64dBc 3rd
402Ω
R
IN
402Ω
R
IN
GAIN = 402Ω/R
1
7
2
8
LT6600-20
V
V
+
MID
OCM
3
6
5V
+
0.1μF
4
5
IN
P-P
, 800Ω Load
49.9Ω
49.9Ω
18pF
P-P
Output
A
+
IN
V
Amplifi er and 20MHz Lowpass Filter
CM
LTC1748
A/D
5V
1μF
V
D
+
V
OUT
66002 TA01a
Very Low Noise, Differential
DESCRIPTION
The LT
4th order 20MHz lowpass fi lter approximating a Chebyshev
frequency response. Most differential amplifi ers require
many precision external components to tailor gain and
bandwidth. In contrast, with the LT6600-20, two external
resistors program differential gain, and the fi lter’s 20MHz
cutoff frequency and passband ripple are internally set.
The LT6600-20 also provides the necessary level shifting
to set its output common mode voltage to accommodate
the reference voltage requirements of A/Ds.
Using a proprietary internal architecture, the LT6600-20
integrates an antialiasing fi lter and a differential ampli-
fi er/driver without compromising distortion or low noise
performance. At unity gain the measured in band signal-
to-noise ratio is an impressive 76dB. At higher gains the
input referred noise decreases so the part can process
smaller input differential signals without signifi cantly
degrading the output signal-to-noise ratio.
The LT6600-20 also features low voltage operation. The
differential design provides outstanding performance for
a 2V
3V supply.
The LT6600-20 is packaged in an SO-8 and is pin compat-
ible with stand alone differential amplifi ers.
P-P
®
6600-20 combines a fully differential amplifi er with a
signal level while the part operates with a single
–100
–110
–120
–20
–30
–40
–50
–70
–10
–60
–80
–90
0
0
An 8192 Point FFT Spectrum
10
FREQUENCY (MHz)
20
INPUT 5.9MHz
2V
f
SAMPLE
P-P
30
LT6600-20
= 80MHz
66002 TA01b
40
66002fb
1

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LT6600IS8-20 Summary of contents

Page 1

... Networking or Cellular Base Station Applications n High Speed Test and Measurement Equipment n Medical Imaging n Drop-in Replacement for Differential Amplifi ers L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION LT6600-20 5V 0.1μF R ...

Page 2

... LEAD BASED FINISH TAPE AND REEL LT6600CS8-20 LT6600CS8-20#TR LT6600IS8-20 LT6600IS8-20#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ELECTRICAL CHARACTERISTICS range, otherwise specifi ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifi cations are 25°C. Unless otherwise specifi PARAMETER Filter Gain 100 IN Filter Gain Temperature Coeffi cient (Note 2) Noise Distortion (Note 4) Differential Output Swing Input Bias ...

Page 4

LT6600-20 TYPICAL PERFORMANCE CHARACTERISTICS Amplitude Response 10 0 –10 –20 –30 –40 –50 –60 – GAIN = 1 – 25°C A –90 0.1 1 FREQUENCY (MHz) Passband Gain and Group Delay ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Distortion vs Signal Level –40 3RD HARMONIC 10MHz INPUT R = 800Ω –50 EACH OUTPUT GAIN = 25°C 2ND A –60 HARMONIC 10MHz INPUT ...

Page 6

LT6600-20 PIN FUNCTIONS – and IN (Pins 1, 8): Input Pins. Signals can be ap- plied to either or both input pins through identical external resistors The DC gain from differential inputs to the IN differential ...

Page 7

APPLICATIONS INFORMATION Interfacing to the LT6600-20 The LT6600-20 requires two equal external resistors set the differential gain to 402Ω/R + fi lter are the voltages V and external components, Figure 1. The difference between + ...

Page 8

LT6600-20 APPLICATIONS INFORMATION In Figure 3 the LT6600-20 is providing 12dB of gain. The gain resistor has an optional 62pF in parallel to improve the passband fl atness near 20MHz. The common mode output voltage is set to 2V. Use ...

Page 9

APPLICATIONS INFORMATION 20 1dB PASSBAND GAIN COMPRESSION POINTS 0 1MHz 85°C –20 3RD HARMONIC 85°C –40 3RD HARMONIC 25°C –60 2ND HARMONIC –80 25°C 2ND HARMONIC –100 85°C –120 1MHz INPUT LEVEL (V Figure 6. ...

Page 10

LT6600-20 APPLICATIONS INFORMATION Noise The noise performance of the LT6600-20 can be evaluated with the circuit of Figure 7. Given the low noise output of the LT6600-20 and the 6dB attenuation of the transformer coupling network necessary to ...

Page 11

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Lowpass and Bandpass Filter Designs Up to 10MHz, Differential Outputs 86dB S/N with 3V Supply, SO-8 82dB S/N with 3V Supply, SO-8 www.linear.com ● OUT OUT – – OUT OUT Transient Response, Gain = 1 66002 TA03 100ns/DIV LT 0409 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2003 66002fb ...

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