LTC6605CDJC-7#PBF Linear Technology, LTC6605CDJC-7#PBF Datasheet

IC FILTER 7MHZ DUAL 22-DFN

LTC6605CDJC-7#PBF

Manufacturer Part Number
LTC6605CDJC-7#PBF
Description
IC FILTER 7MHZ DUAL 22-DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC6605CDJC-7#PBF

Filter Type
Antialiasing
Frequency - Cutoff Or Center
5MHz
Number Of Filters
2
Max-order
2nd
Voltage - Supply
2.7 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
22-DFN
No. Of Amplifiers
2
Input Offset Voltage
1mV
Gain Db Max
14dB
Bandwidth
7MHz
Supply Voltage Range
2.7V To 5.25V
Supply Current
33.1mA
Amplifier Case Style
DFN
No. Of Pins
22
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC6605CDJC-7#PBFLTC6605CDJC-7
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC6605CDJC-7#PBF
Manufacturer:
LTC
Quantity:
79
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
TYPICAL APPLICATION
Two Matched 7MHz 2nd Order Lowpass Filters with
Differential Amplifi ers
< –90dBc Distortion in Passband
2.1nV/√Hz Op Amp Noise Density
Pin-Selectable Gain (0dB/12dB/14dB)
Pin-Selectable Power Consumption (0.35mA/
16.2mA/33.1mA)
Rail-to-Rail Output Swing
2.7V to 5.25V Supply Voltage
Small 22-Pin 6mm × 3mm × 0.75mm DFN Package
WCDMA ADC Driver/Filter
Antialiasing Filter
Single-Ended to Differential Conversion
DAC Smoothing Filter
Zero-IF Direct Conversion Receivers
V
V
INA
INB
+
+
Gain Match: ±0.35dB Max, Passband
Phase Match: ±1.2° Max, Passband
Single-Ended or Differential Inputs
Adjustable Output Common Mode Voltage Control
Buffered, Low Impedance Outputs
3V
3V
Dual, Matched 6.5MHz Lowpass Filter
10
11
1
2
3
4
5
6
7
8
9
+
+
LTC6605-7
22
21
20
19
18
17
16
15
14
13
12
66057 TA01
0.1μF
0.1μF
0.1μF
0.1μF
3V
3V
V
V
OUTA
OUTB
+
+
with Low Noise, Low Distortion
DESCRIPTION
The LTC
tial amplifi ers confi gured as matched 2nd order lowpass
fi lters. The f
6.5MHz to 10MHz.
The internal op amps are fully differential, feature very
low noise and distortion, and are compatible with 16-bit
dynamic range systems. The inputs can accept single-
ended or differential signals. An input pin is provided
for each amplifi er to set the common mode level of the
differential outputs.
Internal laser-trimmed resistors and capacitors determine
a precise, very well matched (in gain and phase) 7MHz
2nd order fi lter response. A single optional external re-
sistor per channel can tailor the frequency response for
each amplifi er.
Three-state BIAS pins determine each amplifi er’s power
consumption, allowing a choice between shutdown, me-
dium power or full power.
The LTC6605-7 is available in a compact 6mm × 3mm
22-pin leadless DFN package and operates over a –40°C
to 85°C temperature range.
All other trademarks are the property of their respective owners.
Dual Matched 7MHz Filter
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
®
6605-7 contains two independent, fully differen-
120
100
40
80
60
20
–3dB
0
Channel to Channel Phase Matching
Differential Amplifi er
–1.2
292 TYPICAL UNITS
T
f
IN
A
of the fi lters is adjustable in the range of
= 25°C
= 7MHz
–0.8
PHASE MATCH (DEG)
–0.4
0
0.4
LTC6605-7
0.8
66057 TA01b
1.2
66057f
1

Related parts for LTC6605CDJC-7#PBF

LTC6605CDJC-7#PBF Summary of contents

Page 1

... The LTC6605-7 is available in a compact 6mm × 3mm 22-pin leadless DFN package and operates over a –40°C to 85°C temperature range. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 120 3V – ...

Page 2

... Junction Temperature ........................................... 150°C Storage Temperature Range ................... –65°C to 150°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC6605CDJC-7#PBF LTC6605CDJC-7#TRPBF LTC6605IDJC-7#PBF LTC6605IDJC-7#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 10k. The fi lter is confi gured for a gain of 1, unless otherwise noted. V BAL V )/ defi ned ...

Page 4

LTC6605-7 AC ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T otherwise noted. Filter confi gured as in Figure 2, unless otherwise noted )/ defi ned –OUT INCM +IN –IN SYMBOL ...

Page 5

ELECTRICAL CHARACTERISTICS Note 8: See the Applications Information section for a detailed discussion of input and output common mode range. Input common mode range is tested by measuring the differential DC gain with V = mid-supply, and again with V ...

Page 6

LTC6605-7 TYPICAL PERFORMANCE CHARACTERISTICS Harmonic Distortion vs Frequency, BIAS High –40 DIFFERENTIAL INPUT, HD2 DIFFERENTIAL INPUT, HD3 –50 SINGLE-ENDED INPUT, HD2 SINGLE-ENDED INPUT, HD3 –60 –70 –80 –90 –100 –110 –120 0 100 FREQUENCY (MHz) 66057 G05 V ...

Page 7

TEST CIRCUITS LTC6605-7 400Ω 1 100Ω INP – BIAS 3 – V INM 100Ω 400Ω 5 LTC6605-7 1μF 400Ω V +IN 1 100Ω BIAS 3 IN – 100Ω 4 1μF 400Ω V ...

Page 8

LTC6605-7 PIN FUNCTIONS +IN4 A, –IN4 A, +IN4 B, –IN4 B (Pins 11): Inputs to Trimmed 400Ω Resistors. Can accept an input signal, be fl oated, tied to an output pin, or connected to external components. +IN1 ...

Page 9

BLOCK DIAGRAM +IN4 A 1 +IN1 A 2 BIAS A 3 –IN1 A 4 –IN4 A 5 – +IN4 B 7 +IN1 B 8 BIAS B 9 –IN1 –IN4 B 114.8pF 400Ω 400Ω 69.3pF 100Ω ...

Page 10

LTC6605-7 APPLICATIONS INFORMATION Functional Description The LTC6605-7 is designed to make the implementation of high frequency fully differential fi ltering functions very easy. Two very low noise amplifi ers are surrounded by precision matched resistors and precision matched capaci- tors ...

Page 11

APPLICATIONS INFORMATION Setting the passband gain (GAIN = R2/R1) only requires choosing a value for R1, since fi xed internal 400Ω. Therefore, the following three gains can be easily confi gured without external components: Table 1. Confi ...

Page 12

LTC6605-7 APPLICATIONS INFORMATION – – 66057 F04a f = 6.5MHz –3dB GAIN = 1V/ V (0dB 800Ω IN Gain Response –10 ...

Page 13

APPLICATIONS INFORMATION 80.6Ω 4 – 80.6Ω 10 – 66057 F05a ±0.4dB 6.7MHz PASSBAND GAIN = 1V/ V (0dB 800Ω IN Gain Response –10 ...

Page 14

LTC6605-7 APPLICATIONS INFORMATION Input Impedance Calculating the low frequency input impedance depends on how the inputs are driven. Figure 6 shows a simplifi ed low frequency equivalent cir- cuit. For balanced input sources (V frequency input impedance is given by ...

Page 15

APPLICATIONS INFORMATION Noise When comparing the LTC6605-7’s noise to that of other amplifi ers, be sure to compare similar specifi cations. Stand- alone op amps often specify noise referred to the inputs of the op amp. The LTC6605-7’s internal op ...

Page 16

LTC6605-7 APPLICATIONS INFORMATION For split power supplies recommended that addi- tional high quality X5R or X7R, 0.1μF capacitors be used + – to bypass pin V to ground and V minimal routing. For driving heavy differential loads (< ...

Page 17

APPLICATIONS INFORMATION the sampling transient of the ADC (see Figure 8). The capacitance serves to provide the bulk of the charge during the sampling process, while the two resistors at the outputs of the LTC6605-7 are used to dampen and ...

Page 18

LTC6605-7 TYPICAL APPLICATIONS V INA V INB THREE GAINS ARE POSSIBLE, AS SHOWN IN FIGURE 4 18 Dual, Matched, 4th Order 7MHz Lowpass Filter LTC6605-7 LTC6605 243Ω – – ...

Page 19

... MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 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 20

... Lowpass and Bandpass Responses Up to 10MHz 1.5nV/√Hz Noise, –95dBc Distortion at 10MHz 1.6nV/√Hz Noise, –72dBc Distortion at 50MHz, 18mA Cut-Off Frequencies of 2.5MHz/5MHz/10MHz/15MHz/20MHz 7MHz to 25MHz Pin-Confi gurable Cut-Off Frequencies of 2.5MHz or 5MHz www.linear.com ● V OUTA V OUTB 100 LT 1208 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 66057f ...

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