lt6600cs8-5-trpbf Linear Technology Corporation, lt6600cs8-5-trpbf Datasheet

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lt6600cs8-5-trpbf

Manufacturer Part Number
lt6600cs8-5-trpbf
Description
Very Low Noise, Differential Amplifier And 10mhz Lowpass Filter
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
V
APPLICATIO S
All other trademarks are the property of their respective owners.
IN
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Programmable Differential Gain via Two External
Resistors
Adjustable Output Common Mode Voltage
Operates and Specified with 3V, 5V, ±5V Supplies
0.5dB Ripple 4th Order Lowpass Filter with 10MHz
Cutoff
82dB S/N with 3V Supply and 2V
Low Distortion, 2V
Fully Differential Inputs and Outputs
Compatible with Popular Differential Amplifier
Pinouts
SO-8 and DFN-12 Packages
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 Amplifiers
0.01μF
402Ω
1MHz: 88dBc 2nd, 97dBc 3rd
5MHz: 74dBc 2nd, 77dBc 3rd
R
IN
402Ω
R
IN
GAIN = 402Ω/R
1
7
2
8
LT6600-10
V
V
+
MID
OCM
3
6
5V
+
0.1μF
U
4
5
IN
P-P
, 800Ω Load
49.9Ω
49.9Ω
U
18pF
P-P
(S8 pin numbers shown)
Output
A
+
IN
V
CM
LTC1748
5V
1μF
V
D
+
V
Amplifier and 10MHz Lowpass Filter
OUT
6600 TA01a
DESCRIPTIO
The LT
with a 4th order 10MHz lowpass filter approximating a
Chebyshev frequency response. Most differential amplifi-
ers require many precision external components to tailor
gain and bandwidth. In contrast, with the LT6600-10, two
external resistors program differential gain, and the filter’s
10MHz cutoff frequency and passband ripple are internally
set. The LT6600-10 also provides the necessary level
shifting to set its output common mode voltage to accom-
modate the reference voltage requirements of A/Ds.
Using a proprietary internal architecture, the LT6600-10
integrates an antialiasing filter and a differential amplifier/
driver without compromising distortion or low noise
performance. At unity gain the measured in band
signal-to-noise ratio is an impressive 82dB. 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 LT6600-10 also features low voltage operation. The
differential design provides outstanding performance for
a 2V
supply.
For similar devices with other cutoff frequencies, refer to
the LT6600-20, LT6600-15, LT6600-5 and LT6600-2.5.
P-P
Very Low Noise, Differential
®
signal level while the part operates with a single 3V
6600-10 combines a fully differential amplifier
–100
–110
–20
–40
–50
–60
–80
–90
–10
–30
–70
0
0
U
An 8192 Point FFT Spectrum
4
8
FREQUENCY (MHz)
INPUT IS A 4.7MHz SINEWAVE
2V
f
SAMPLE
12
P-P
16
= 66MHz
20
LT6600-10
24
28
6600 TA01b
32
6600fa
1

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lt6600cs8-5-trpbf Summary of contents

Page 1

... Networking or Cellular Base Station Applications ■ High Speed Test and Measurement Equipment ■ Medical Imaging ■ Drop-in Replacement for Differential Amplifiers , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U TYPICAL APPLICATIO LT6600-10 5V 0.1μF ...

Page 2

... LT6600IDF-10#TRPBF LEAD BASED FINISH TAPE AND REEL LT6600CS8-10 LT6600CS8#TR LT6600IS8-10 LT6600IS8-10#TR Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on nonstandard lead based finish parts. Temperature grades are identified by a label on the shipping container. ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifications are PARAMETER Filter Gain Filter Gain ±5V Filter Gain 3V, 5V, ±5V Filter Gain 100Ω ...

Page 4

LT6600-10 ELECTRICAL CHARACTERISTICS range, otherwise specifications are PARAMETER Input Referred Differential Offset Differential Offset Drift Input Common Mode Voltage (Note 3) Output Common Mode Voltage (Note 5) Output Common Mode Offset (with respect to Pin 2) Common ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Amplitude Response 10 0 –10 –20 –30 –40 –50 –60 –70 –80 100k 1M FREQUENCY (Hz) Passband Gain and Group Delay ...

Page 6

LT6600- TYPICAL PERFOR A CE CHARACTERISTICS Distortion vs Signal Level 800Ω at Each Output 25°C A –40 2ND HARMONIC, 5MHz INPUT 3RD HARMONIC, –50 5MHz INPUT 2ND HARMONIC, 1MHz ...

Page 7

CTIO S (DFN/S8) – and IN (Pins 1, 12/Pins 1, 8): Input Pins. Signals can be applied to either or both input pins through identical external resistors The DC gain from ...

Page 8

LT6600-10 W BLOCK DIAGRA – – MID + V 11k 402Ω 11k – AMP 200Ω + – V OCM + – 200Ω 402Ω – ...

Page 9

U U APPLICATIO S I FOR ATIO Interfacing to the LT6600-10 Note: The referenced pin numbers correspond to the S8 package. See the Pin Functions for the equivalent DFN-12 package pin numbers. The LT6600-10 requires 2 equal external resistors, R ...

Page 10

LT6600- APPLICATIO S I FOR ATIO the passband flatness near 10MHz. The common mode output voltage is set to 2V. Use Figure 4 to determine the interface between the LT6600-10 and a current output DAC. The gain, or ...

Page 11

U U APPLICATIO S I FOR ATIO 20 1dB PASSBAND GAIN COMPRESSION POINTS 0 1MHz 85°C –20 3RD HARMONIC 85°C –40 3RD HARMONIC 25°C –60 2ND HARMONIC 85°C –80 2ND HARMONIC 25°C –100 –120 1MHz ...

Page 12

LT6600- APPLICATIO S I FOR ATIO 2.5V 0.1μ 25Ω – LT6600-10 2 – 25Ω 0.1μ – 2.5V Figure 7. (S8 Pin Numbers) Example: ...

Page 13

U U APPLICATIO S I FOR ATIO – connected to the V pin to provide a heat sink, the thermal resistance will be around 105°C/W. Table 2 can be used as a guide when considering thermal resistance. Junction temperature, T ...

Page 14

LT6600-10 PACKAGE DESCRIPTIO 3.38 ±0.05 4.50 ± 0.05 2.65 ± 0.05 3.10 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (NOTE 6) 0.200 REF NOTE: 1. DRAWING ...

Page 15

... 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Transient Response 5th Order, 10MHz Lowpass Filter Differential Gain = OUT 50mV/DIV DIFFERENTIAL INPUT 200mV/DIV 100ns/DIV 100M Amplitude Response –8 200k 1M 10M 100M FREQUENCY (Hz) 6600 TA03b LT 0507 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2002 6600 TA02c 6600fa ...

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