LT6402CUD-12#TRPBF Linear Technology, LT6402CUD-12#TRPBF Datasheet

IC DIFF AMP/ADC DVR 12DB 16-QFN

LT6402CUD-12#TRPBF

Manufacturer Part Number
LT6402CUD-12#TRPBF
Description
IC DIFF AMP/ADC DVR 12DB 16-QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LT6402CUD-12#TRPBF

Amplifier Type
Differential
Number Of Circuits
2
Output Type
Differential
Slew Rate
400 V/µs
-3db Bandwidth
300MHz
Current - Input Bias
5µA
Voltage - Input Offset
1000µV
Current - Supply
30mA
Current - Output / Channel
35mA
Voltage - Supply, Single/dual (±)
4 V ~ 5.5 V, ±2 V ~ 2.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-WQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Gain Bandwidth Product
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT6402CUD-12#TRPBFLT6402CUD-12
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LT6402CUD-12#TRPBFLT6402CUD-12#PBF
Manufacturer:
LT
Quantity:
2
Company:
Part Number:
LT6402CUD-12#TRPBFLT6402CUD-12#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT6402CUD-12#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
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L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
IF IN
300 MHz –3dB Bandwidth
Fixed Gain of 12dB
Low Distortion:
Low Noise:
Differential Inputs and Outputs
Additional Filtered Outputs
Adjustable Output Common Mode Voltage
DC- or AC-Coupled Operation
Minimal Support Circuitry Required
Small 0.75mm Profi le 16-Lead 3mm × 3mm QFN
Package
Differential ADC Driver for:
Differential Driver/Receiver
Single Ended to Differential Conversion
Differential to Single Ended Conversion
Level Shifting
IF Sampling Receivers
SAW Filter Interfacing/Buffering
0.1μF
0.1μF
43dBm OIP3, –82dBc HD3 (20MHz, 2V
15dB NF , e
Imaging
Communications
0.1μF
–INB
–INA
+INB
+INA
n
= 2.6nV/√Hz (20MHz)
LT6402-12
V
V
5V
CC
EE
V
OCM
+OUT
–OUT
0.1μF
10Ω
10Ω
AIN
AIN
+
LTC
P-P
V
®
CM
2249
)
64026 TA01a
300MHz Low Distortion, Low
Noise Differential Amplifi er/
DESCRIPTION
The LT
amplifi er/ADC driver for use in applications from DC to
300MHz. The LT6402-12 has been designed for ease of
use, with minimal support circuitry required. Exceptionally
low input-referred noise and low distortion (with either
single-ended or differential inputs) make the LT6402-12
an excellent solution for driving high speed 12-bit and
14-bit ADCs. In addition to the normal unfi ltered outputs
(+OUT and –OUT), the LT6402-12 has a built-in 75MHz
differential low pass fi lter and an additional pair of fi ltered
outputs (+OUTFILTERED, –OUTFILTERED) to reduce
external fi ltering components when driving high speed
ADCs. The output common mode voltage is easily set via
the V
coupling capacitors in many applications.
The LT6402-12 is designed to meet the demanding require-
ments of communications transceiver applications. It can
be used as a differential ADC driver, a general-purpose
differential gain block, or in other applications requiring
differential drive. The LT6402-12 can be used in data
acquisition systems required to function at frequencies
down to DC.
The LT6402-12 operates on a 5V supply and consumes 30mA.
It comes in a compact 16-lead 3mm × 3mm QFN package
and operates over a –40°C to 85°C temperature range.
OCM
Distortion vs Frequency, Differential Input, No R
®
ADC Driver (A
6402-12 is a low distortion, low noise differential
pin, eliminating an output transformer or AC-
–100
–40
–60
–50
–70
–80
–90
1
FILTERED OUTPUTS
V
OUT
= 2V
P-P
FREQUENCY (MHz)
HD3
HD2
10
LT6402-12
V
640212 TA01b
= 12dB)
100
LOAD
640212fa
1

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LT6402CUD-12#TRPBF Summary of contents

Page 1

... Single Ended to Differential Conversion n Differential to Single Ended Conversion n Level Shifting n IF Sampling Receivers n SAW Filter Interfacing/Buffering L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 5V 0.1μF 0.1μF –INB V CC – ...

Page 2

... Specifi ed Temperature Range (Note 4) .... –40°C to 85°C Storage Temperature Range ................... –65°C to 125°C Junction Temperature ........................................... 125°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT6402CUD-12#PBF LT6402CUD-12#TRPBF LT6402IUD-12#PBF LT6402IUD-12#TRPBF LEAD BASED FINISH TAPE AND REEL LT6402CUD-12 LT6402CUD-12#TR LT6402IUD-12 LT6402IUD-12#TR Consult LTC Marketing for parts specifi ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T shorted to +INB (+IN), –INA shorted to –INB (–IN), V SYMBOL PARAMETER I Input Voltage Range, MIN VRMIN I Input Voltage Range, MAX VRMAX R Input Resistance INDIFF C ...

Page 4

LT6402-12 AC ELECTRICAL CHARACTERISSTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0.8V, +INA shorted to +INB (+IN), –INA shorted to –INB (–IN), V unless otherwise noted. SYMBOL PARAMETER Input/Output Characteristics –3dBBW –3dB Bandwidth 0.1dBBW ...

Page 5

AC ELECTRICAL CHARACTERISTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0.8V, +INA shorted to +INB (+IN), –INA shorted to –INB (–IN), V unless otherwise noted. SYMBOL PARAMETER 25MHz Signal Second/Third Harmonic Distortion Third-Order IMD ...

Page 6

LT6402-12 TYPICAL PERFORMANCE CHARACTERISTICS Third Order Intermodulation Distortion vs Frequency, Differential Input LOAD –65 2 TONES 2V COMPOSITE P-P –70 1MHz TONE SPACING –75 UNFILTERED OUTPUTS –80 –85 FILTERED OUTPUTS –90 – ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Noise Figure vs Frequency 30 MEASURED USING DC954 DEMO BOARD 100 1000 FREQUENCY (MHz) 640212 G13 Differential Input Impedance vs Frequency 300 250 200 150 IMPEDANCE MAGNITUDE 100 50 IMPEDANCE ...

Page 8

LT6402-12 TYPICAL PERFORMANCE CHARACTERISTICS Large-Signal Transient Response 3 100Ω PER OUTPUT LOAD 3.2 2.7 2.2 1.7 1.2 TIME (10ns/DIV) 640212 G22 Turn-Off Time 4 100Ω LOAD PER OUTPUT 3.5 3.0 +OUT 2.5 2.0 –OUT 1.5 1.0 ...

Page 9

PIN FUNCTIONS V (Pin 2): This pin sets the output common mode OCM voltage. Without additional biasing, both inputs bias to this voltage as well. This input is high impedance (Pins 3, 10, 1): Positive ...

Page 10

LT6402-12 BLOCK DIAGRAM –INA 100Ω 14 –INB 100Ω 13 200Ω 200Ω +INA 100Ω 16 +INB 100Ω CCA APPLICATIONS INFORMATION Circuit Description The LT6402- low noise, low distortion differential amplifi er/ADC driver with: • –3dB bandwidth ...

Page 11

APPLICATIONS INFORMATION The LT6402-12 has been designed to minimize the need for external support components such as transformers or AC-coupling capacitors ADC driver, the LT6402-12 requires no external components except for power-supply bypass capacitors. This allows DC-coupled operation ...

Page 12

LT6402-12 APPLICATIONS INFORMATION prior to the ADC to limit input noise at the ADC, thereby improving system signal to noise ratio. Both the unfi ltered and fi ltered outputs of the LT6402-12 can easily drive the high impedance inputs of ...

Page 13

APPLICATIONS INFORMATION can also be used, but since it is being driven differentially it will appear at each fi ltered output as a single-ended capacitance of twice the value. To halve the fi lter band- width, for example, two 42pF ...

Page 14

LT6402-12 APPLICATIONS INFORMATION Large Output Voltage Swings The LT6402-12 has been designed to provide the 3.2V output swing needed by the LTC1748 family of 14-bit P low-noise ADCs. This additional output swing improves system SNR 4dB. Input ...

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. UD Package 16-Lead Plastic QFN (3mm × ...

Page 16

... R13 C16 C22 [1] [1] 0.1μ 4:1 TEST OUT 4 3 C20, 0.1μ MINI CIRCUITS TCM 4-19 640212 TA02 = 3.8nV/√Hz at 20MHz, 150mW n = 1.9nV/√Hz at 20MHz, 150mW n LT 1007 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2006 J4 –OUT J5 +OUT 640212fa ...

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