LT6604CUFF-5#PBF Linear Technology, LT6604CUFF-5#PBF Datasheet

IC AMP DIFF LN DUAL 34-QFN

LT6604CUFF-5#PBF

Manufacturer Part Number
LT6604CUFF-5#PBF
Description
IC AMP DIFF LN DUAL 34-QFN
Manufacturer
Linear Technology
Datasheets

Specifications of LT6604CUFF-5#PBF

Amplifier Type
Differential
Number Of Circuits
2
Output Type
Differential
Current - Input Bias
30µA
Voltage - Input Offset
8000µV
Current - Supply
30mA
Voltage - Supply, Single/dual (±)
3 V ~ 11 V, ±1.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
34-QFN
No. Of Amplifiers
2
Input Offset Voltage
35mV
Bandwidth
5MHz
Supply Voltage Range
3V To 11V
Supply Current
30mA
Amplifier Case Style
QFN
No. Of Pins
34
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output / Channel
-
-3db Bandwidth
-
Slew Rate
-
Gain Bandwidth Product
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT6604CUFF-5#PBFLT6604CUFF-5
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LT6604CUFF-5#PBF
Manufacturer:
LT
Quantity:
780
FEATURES
APPLICATIONS
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n
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n
n
n
n
n
n
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TYPICAL APPLICATION
Dual Differential Amplifi er with 2.5MHz Lowpass Filters
>86dB Signal-to-Noise (3V Supply, 1V
Low Distortion (1MHz, 1V
Specifi ed for Operation with 3V, 5V and ±5V Supplies
Fully Differential Inputs and Outputs
Adjustable Output Common Mode Voltage
Small 4mm × 7mm × 0.75mm QFN Package
Dual Differential ADC Driver and Filter
Single-Ended to Differential Converter
Matched, Dual, Differential Gain or Filter Stage
Common Mode Translation of Differential Signals
High Speed ADC Antialiasing and DAC Smoothing in
Wireless Infrastructure or Networking Applications
High Speed Test and Measurement Equipment
Medical Imaging
+
+
0.01μF
0.01μF
4th Order Filters
Approximates Chebyshev Response
Guaranteed Phase and Gain Matching
Resistor-Programmable Differential Gain
HD2: 92dBc
HD3: 88dBc
1580Ω
1580Ω
1580Ω
1580Ω
LT6604-2.5
+INA
V
V
–INA
+INB
V
V
–INB
MIDA
OCMA
MIDB
OCMB
+
+
+
+
V
RMS
–OUTB
+OUTB
–OUTA
+OUTA
V
V
V
+
+
+
A
B
B
Output, 800Ω Load)
3V
3V
50Ω
50Ω
50Ω
50Ω
RMS
Output)
18pF
18pF
LTC22xx
AIN
AIN
+
+
3V
DOUT
DOUT
DESCRIPTION
The LT
amplifi ers, each with a 4th order, 2.5MHz lowpass fi lter. The
fi xed frequency lowpass fi lter approximates a Chebyshev
response. By integrating a fi lter and a differential ampli-
fi er, distortion and noise are made exceptionally low. At
unity gain, the measured in-band signal-to-noise ratio is
an impressive 86dB. At higher gains, the input referred
noise decreases, allowing the part to process smaller
input differential signals without signifi cantly degrading
the signal-to-noise ratio.
Gain and phase are well matched between the two chan-
nels. Gain for each channel is independently programmed
using two external resistors. The LT6604-2.5 enables level
shifting by providing an adjustable output common mode
voltage, making it ideal for directly interfacing to ADCs.
The LT6604-2.5 is fully specifi ed for 3V operation. The
differential design enables outstanding performance up
to a 4V
See the back page of this datasheet for a complete list of
related single and dual differential amplifi ers with integrated
2.5MHz to 20MHz lowpass fi lters.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.v
DUAL ADC
660425 TA01
Differential Amplifi er and
®
P-P
6604-2.5 consists of two matched, fully differential
signal level for a single 3V supply.
2.5MHz Lowpass Filter
Dual Very Low Noise,
18
16
14
12
10
8
6
4
2
0
–0.25
Channel to Channel Gain Matching
50 TYPICAL UNITS
T
GAIN = 1
f
IN
A
= 25°C
= 2.5MHz
–0.15
GAIN MATCH (dB)
–0.05
0
LT6604-2.5
0.05
0.15
660425 TA01b
0.25
660425fa
1

Related parts for LT6604CUFF-5#PBF

LT6604CUFF-5#PBF Summary of contents

Page 1

... See the back page of this datasheet for a complete list of related single and dual differential amplifi ers with integrated 2.5MHz to 20MHz lowpass fi lters. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.v 3V ...

Page 2

... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT6604CUFF-2.5#PBF LT6604CUFF-2.5#TRPBF LT6604IUFF-2.5#PBF LT6604IUFF-2.5#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 1k. LOAD PARAMETER Matching of Filter Gain Matching of Filter Phase Filter Gain Either Channel Matching ...

Page 4

LT6604-2.5 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 1k. LOAD PARAMETER Input Bias Current Input Referred Differential Offset Differential Offset Drift Input Common Mode Voltage (Note 3) Output Common Mode Voltage (Note 5) Output Common ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Frequency Response 2. 1580Ω GAIN = 1 –12 –24 –36 –48 –60 –72 –84 –96 100k 1M 10M 50M FREQUENCY (Hz) 660425 G01 Output Impedance vs Frequency + – ...

Page 6

LT6604-2.5 TYPICAL PERFORMANCE CHARACTERISTICS Distortion vs Signal Level –40 2ND HARMONIC, DIFFERENTIAL INPUT –50 3RD HARMONIC, DIFFERENTIAL INPUT 2ND HARMONIC, –60 SINGLE-ENDED INPUT 3RD HARMONIC, –70 SINGLE-ENDED INPUT –80 – 1MHz R = 800Ω ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Transient Response Gain = OUT 50mV/DIV DIFFERENTIAL INPUT 200mV/DIV 500ns/DIV PIN FUNCTIONS +INA, –INA (Pins 2, 4): Channel A Input Pins. Signals can be applied to either or both input pins through identical external ...

Page 8

LT6604-2.5 PIN FUNCTIONS +OUTA, – OUTA (Pins 27, 29): Output Pins. Pins 27 and 29 are the fi lter differential outputs for channel A. With a typical short-circuit current greater than ±40mA, each pin can drive a 100Ω and/or 50pF ...

Page 9

APPLICATIONS INFORMATION Interfacing to the LT6604-2.5 Note: The LT6604-2.5 contains two identical lowpass fi lters. The following applications information only refers to one fi lter. The two fi lters are independent except that they share the same negative supply voltage ...

Page 10

LT6604-2.5 APPLICATIONS INFORMATION Use Figure 4 to determine the interface between the LT6604-2.5 and a current output DAC. The gain, or “tran- simpedance,” is defi ned OUT transimpedance, use the following equation: 1580 • ...

Page 11

APPLICATIONS INFORMATION V can be shorted to V for simplicity different OCM MID common mode output voltage is required, connect voltage source or resistor network. For 3V and 3.3V supplies the voltage at V must ...

Page 12

LT6604-2.5 APPLICATIONS INFORMATION input resistors grounded, measure the total integrated noise out of the fi lter (e ). With the signal source connected, set O the frequency to 100kHz and adjust the amplitude until V measures 100mV . Measure the ...

Page 13

TYPICAL APPLICATIONS 16 BIT 4kHz to 2.5MHz DISCRETE MULTI-TONE SIGNAL @ 50MSPS DAC Output Spectrum 0 –10 –20 BASEBAND SIGNAL –30 –40 –50 DAC OUTPUT IMAGE –60 –70 –80 – FREQUENCY (MHz) ...

Page 14

LT6604-2.5 TYPICAL APPLICATIONS Dual, Matched 5th Order, 2.5MHz Lowpass Filter, Gain = 1 Frequency Response 10 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 100k 1M FREQUENCY (Hz 0.1μ 787Ω 787Ω ...

Page 15

... ON THE TOP AND BOTTOM OF PACKAGE 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. UFF Package 34-Lead Plastic QFN (4mm × ...

Page 16

... SNR = 76dB at 3V Supply, 4th Order Filter SNR = 76dB at 3V Supply, 4th Order Filter SNR = 82dB at 3V Supply, 4th Order Filter SNR = 82dB at 3V Supply, 4th Order Filter SNR = 76dB at 3V Supply, 4th Order Filter LT 0409 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 660425fa ...

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