LTC6605CDJC-14#PBF Linear Technology, LTC6605CDJC-14#PBF Datasheet

IC FILTER 14MHZ DUAL 22-DFN

LTC6605CDJC-14#PBF

Manufacturer Part Number
LTC6605CDJC-14#PBF
Description
IC FILTER 14MHZ DUAL 22-DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC6605CDJC-14#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
9.5dB
Bandwidth
14MHz
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-14#PBFLTC6605CDJC-14
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC6605CDJC-14#PBF
Manufacturer:
Linear Technology
Quantity:
135
Company:
Part Number:
LTC6605CDJC-14#PBF
Manufacturer:
LTC
Quantity:
38
FEATURES
APPLICATIONS
n
n
n
n
n
n
n
n
n
n
n
n
n
TYPICAL APPLICATION
Two Matched 14MHz 2nd Order Lowpass Filters
with Differential Amplifi ers
< –84dBc Distortion in Passband
2.1nV/√Hz Op Amp Noise Density
Pin-Selectable Gain (0dB/6dB/9.5dB)
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
Broadband Wireless ADC Driver/Filter
Antialiasing Filter
Single-Ended to Differential Conversion
DAC Smoothing Filter
Zero-IF Direct Conversion Receivers
+
+
V
V
Gain Match: ±0.25dB Max, Passband
Phase Match: ±1.1° Max, Passband
Single-Ended or Differential Inputs
Adjustable Output Common Mode Voltage Control
Buffered, Low Impedance Outputs
INA
INB
3V
3V
Dual, Matched 12.4MHz Lowpass Filter
10
11
1
2
3
4
5
6
7
8
9
+
+
LTC6605-14
22
21
20
19
18
17
16
15
14
13
12
660514 TA01
0.1μF
0.1μF
0.1μF
0.1μF
3V
3V
V
V
OUTA
OUTB
+
+
with Low Noise, Low Distortion
DESCRIPTION
The LTC
ential amplifi ers confi gured as matched 2nd order 14MHz
lowpass fi lters. The f
range of 12.4MHz to 20MHz and 25MHz.
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) 14MHz
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 LTC6605-14 is available in a compact 6mm × 3mm
22-pin leadless DFN package and operates over a –40°C
to 85°C temperature range.
Dual Matched 14MHz Filter
All other trademarks are the property of their respective owners.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
®
6605-14 contains two independent, fully differ-
160
140
120
100
40
80
60
20
0
Channel to Channel Phase Matching
–1.0
354 TYPICAL UNITS
T A = 25°
f
Differential Amplifi er
IN
= 14MHz
–0.6
–3dB
PHASE MATCH (DEG)
–0.2
of the fi lters is adjustable in the
0
0.2
LTC6605-14
0.6
66057 TA01b
1.0
660514f
1

Related parts for LTC6605CDJC-14#PBF

LTC6605CDJC-14#PBF Summary of contents

Page 1

... The LTC6605-14 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. 3V – ...

Page 2

... Storage Temperature Range ................... –65°C to 150°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LTC6605CDJC-14#PBF LTC6605CDJC-14#TRPBF 660514 LTC6605IDJC-14#PBF LTC6605IDJC-14#TRPBF 660514 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 at T Open 10k. The fi lter is confi gured for a gain of 1, unless otherwise noted. V BAL ( )/ defi ned as ...

Page 4

LTC6605-14 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 SYMBOL PARAMETER ...

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

LTC6605-14 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) 660514 G05 V ...

Page 7

TEST CIRCUITS LTC6605-14 200Ω 1 100Ω INP – BIAS 3 – V INM 100Ω 200Ω 5 LTC6605-14 1μF 200Ω V +IN 1 100Ω BIAS 3 IN – 100Ω 4 1μF 200Ω V ...

Page 8

LTC6605-14 PIN FUNCTIONS +IN2 A, –IN2 A, +IN2 B, –IN2 B (Pins 11): Inputs to Trimmed 200Ω Resistors. Can accept an input signal, be fl oated, tied to an output pin, or connected to external components. +IN1 ...

Page 9

BLOCK DIAGRAM +IN2 A 1 +IN1 A 2 BIAS A 3 –IN1 A 4 –IN2 A 5 – +IN2 B 7 +IN1 BIAS B –IN1 –IN2 B 81.5pF 200Ω 200Ω 48.2pF 100Ω ...

Page 10

LTC6605-14 APPLICATIONS INFORMATION Functional Description The LTC6605-14 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 200Ω. Therefore, the following three gains can be easily confi gured without external components: Table 1. Confi ...

Page 12

LTC6605-14 APPLICATIONS INFORMATION – – 660514 F04a f = 12.3MHz –3dB GAIN = 1V/ V (0dB 400Ω IN Gain Response –10 ...

Page 13

APPLICATIONS INFORMATION 200Ω 4 – 200Ω 10 – 11 ±0.4dB 14MHz PASSBAND GAIN = 1V/ V (0dB 400Ω IN Gain Response 10 0 –10 –20 –30 –40 0 FREQUENCY ...

Page 14

LTC6605-14 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 LTC6605-14’s noise to that of other amplifi ers, be sure to compare similar specifi - cations. Standalone op amps often specify noise re- ferred to the inputs of the op amp. The LTC6605-14’s internal ...

Page 16

LTC6605-14 APPLICATIONS INFORMATION Board Layout and Bypass Capacitors For single-supply applications it is recommended that a high quality X5R or X7R, 0.1μF bypass capacitor be placed + directly between V and the adjacent V including the Exposed Pad, should be ...

Page 17

APPLICATIONS INFORMATION load transient before the acquisition period has ended, for a valid representation of the input signal. The LTC6605-14 will settle quickly from these periodic load impulses. The RC network between the outputs of the driver decouples the sampling ...

Page 18

LTC6605-14 TYPICAL APPLICATIONS V INA V INB THREE GAINS ARE POSSIBLE, AS SHOWN IN FIGURE 4 18 Dual, Matched, 4th Order 14MHz Lowpass Filter LTC6605-14 LTC6605- 1. – – ...

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

... 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 ● Gain Magnitude vs Frequency 3 0 –3 –6 –9 –12 –15 –18 –21 –24 0 100 FREQUENCY (MHz) 660514 TA05 LT 1208 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 660514f ...

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