LTC6603IUF#PBF Linear Technology, LTC6603IUF#PBF Datasheet

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LTC6603IUF#PBF

Manufacturer Part Number
LTC6603IUF#PBF
Description
IC FILTER LOWPASS 24-QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC6603IUF#PBF

Filter Type
Low Pass
Frequency - Cutoff Or Center
80MHz
Number Of Filters
2
Max-order
9th
Voltage - Supply
2.7 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
24-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC6603IUF#PBFLTC6603IUF
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC6603IUF#PBF
Manufacturer:
LTC
Quantity:
31
Company:
Part Number:
LTC6603IUF#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
BASEBAND
GAIN CONTROL
30.9k
Guaranteed Phase and Gain Matching Specs
Programmable BW Up to 2.5MHz
Programmable Gain (0dB/6dB/12dB/24dB)
9th Order Linear Phase Response
Differential, Rail-to-Rail Inputs and Outputs
Low Noise: –145dBm/Hz (Input Referred)
Low Distortion: –75dBc at 200kHz
Simple Pin Programming or SPI Interface
Set the Max Speed/Power with an External R
Operates from 2.7V to 3.6V
Input Range from 0V to 5.5V
4mm × 4mm QFN Package
Small/Low Cost Basestations:
Low Cost Repeaters, Radio Links, and Modems
802.11x Receivers
JTRS
I
Q
IN
0.1μF
0.1μF
IN
IDEN, PHS, TD-SCDMA, CDMA2000, WCDMA,
UMTS
V+
+INA
–INA
+INB
–INB
R
V
CAP
GAIN1
GAIN0
GND
GND
5V
BIAS
OCM
IN
2.5MHz I and Q Lowpass Filter and Dual ADC
LTC6603
0.1μF
V+
A
CLKCNTL
V+
+OUTB
–OUTB
+OUTA
–OUTA
3V
CLKIO
LPFO
LPF1
D
SDO
SER
SDI
0.1μF
3V
3V
49.9Ω 100nH*
49.9Ω 100nH*
49.9Ω 100nH*
49.9Ω 100nH*
Q OUTPUT
I OUTPUT
180pF
180pF
180pF
180pF
*COILCRAFT 0603HP
V
10pF
10pF
10pF
10pF
2.2μF
CM
DESCRIPTION
LTC2297
The LTC
fi lter for communications receivers and transmitters. The
selectivity of the LTC6603, combined with its linear phase,
phase matching and dynamic range, make it suitable for
fi ltering in many communications systems. With 1.5°
phase matching between channels, the LTC6603 can be
used in applications requiring pairs of matched fi lters,
such as transceiver I and Q channels. Furthermore, the
differential inputs and outputs provide a simple interface
for most communications systems.
The sampled data fi lter does not require an external clock
yet its cutoff frequency can be set with a single external
resistor with an accuracy of 3.5% or better. The external
resistor programs an internal oscillator whose frequency
is divided prior to being applied to the fi lter networks.
This allows up to three cutoff frequencies that can be
obtained for each external resistor value, allowing the
cutoff frequency to be programmed over a range of more
than six octaves. Alternatively, the cutoff frequency can
be set with an external clock. The fi lter gain can also be
programmed to 1, 2, 4 or 16.
The LTC6603 features a low power shutdown mode that
can be programmed through the serial interface and is
available in a 24-pin 4mm × 4mm QFN package.
14-BIT
14-BIT
ADC
ADC
6603 TA01a
®
6603 is a dual, matched, programmable lowpass
Dual Adjustable
60
50
40
30
20
10
0
–2.5
Lowpass Filter
V
f = 125kHz, T
1000 UNITS
S
–2 –1.5 –1 –0.5 0 0.5 1 1.5 2
= 3V, BW = 156.25kHz
Phase Matching
A
MISMATCH (DEG)
= 25°C
LTC6603
6603 TA01b
2.5
6603fa
1

Related parts for LTC6603IUF#PBF

LTC6603IUF#PBF Summary of contents

Page 1

... Low Cost Repeaters, Radio Links, and Modems n 802.11x Receivers n JTRS L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 2.5MHz I and Q Lowpass Filter and Dual ADC 5V 3V 49.9Ω ...

Page 2

... LEAD FREE FINISH TAPE AND REEL LTC6603CUF#PBF LTC6603CUF#TRPBF LTC6603IUF#PBF LTC6603IUF#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 at T cutoff = 2.5MHz, internal clocking with R PARAMETER CONDITIONS Filter Phase Either External Clock = 80MHz, Filter Cutoff (f Channel f = 62.5kHz (0.4 • 125kHz ...

Page 4

LTC6603 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T cutoff = 2.5MHz, internal clocking with R PARAMETER CONDITIONS V Differential Input Referred Differential Offset Voltage at Either Output OS Lowest Cutoff Frequency, Gain Setting = 24dB Highest Cutoff ...

Page 5

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T 2.5MHz, internal clocking with R = 30.9k unless otherwise noted. BIAS PARAMETER CONDITIONS CLKIO Pin Low Level 3V, CLKCNTL = Output Voltage I ...

Page 6

LTC6603 ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: LTC6603C and ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Gain and Group Delay vs Frequency 30 GAIN = 12dB 20 GAIN = 24dB GAIN = 6dB 10 0 GAIN = 0dB –10 –20 GROUP DELAY –30 – 30.9k BIAS –50 ...

Page 8

LTC6603 TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio 100 GAIN = 0dB 90 GAIN = 6dB 80 GAIN = 12dB 70 GAIN = 24dB 3V 30.9k S BIAS 30 LPF1 = 1, BW ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS OIP3 vs Temperature 3V 30.9k S BIAS PASSBAND GAIN = 24dB 6dBm PER TONE FOR 2-TONE TEST OUT Δf = 10kHz 625kHz, FREQUENCY = 200kHz ...

Page 10

LTC6603 TYPICAL PERFORMANCE CHARACTERISTICS Integral Input Referred Noise 1000 30.9k BIAS S LPF1 = 1,BW = 2.5MHz T = 25°C A GAIN = 6dB 100 GAIN = 0dB 10 GAIN = 12dB GAIN = 24dB ...

Page 11

PIN FUNCTIONS LPF1(CS) (Pin 6): TTL Level Input. When in pin program- mable control mode, this pin is the MSB of the lowpass cutoff frequency control code; in serial control mode, this pin is the chip select input (active low). ...

Page 12

LTC6603 BLOCK DIAGRAM +INA PIN OCM GND R 4 BIAS CLKCNTL 5 LPF1(CS +INB TIMING DIAGRAM SCLK D3 SDI CS D4 ...

Page 13

APPLICATIONS INFORMATION Theory of Operation (Refer to Block Diagram) The LTC6603 features two matched fi lter channels, each containing gain control and lowpass fi lter networks that are controlled by a single control block and clocked by a single clock ...

Page 14

LTC6603 APPLICATIONS INFORMATION V+ D (INTERNAL NODE) 6603 F02 Figure 2. Bidirectional Design of GAIN0(OUT) Pin 3.3V 0.1μ IN1 – CSX SCLK μP SDI SCLK D15 D11 SDI GAIN, BW CONTROL WORD FOR #2 CS Serial Control Register ...

Page 15

APPLICATIONS INFORMATION GAIN1 and GAIN0 are the gain control bits (register bits D6 and D7 when in serial mode). Their function is shown in Table 1. In serial mode, register bit D1 can be set put the ...

Page 16

LTC6603 APPLICATIONS INFORMATION The following graphs show a few of the possible lowpass fi lters. Gain and Group Delay vs Frequency (2.5MHz Lowpass Response) 0 GAIN –20 –40 –60 GROUP DELAY –80 –100 –120 100k 1M FREQUENCY (Hz) Gain and ...

Page 17

APPLICATIONS INFORMATION 5V I RANGE = 6μA TO 38.4μA C7 USE NARROW SHORT 100nF TRACES FOR MINIMUM CAPACITANCE. LTC6078 V+ 2 – OUT 3 RK7002AT116CT +IN V– R1 30.5k 5V LTC6078 V+ 7 –IN OUT +IN V– ...

Page 18

LTC6603 APPLICATIONS INFORMATION than 100k. If the value too large, the fi lters will BIAS not receive a large enough bias current, possibly causing errors due to insuffi cient settling. Be sure to obey the absolute maximum ...

Page 19

APPLICATIONS INFORMATION not independent as they are both set by the V Figure 10 illustrates the distortion versus output common mode voltage for a 2V differential input voltage and a P-P common mode input voltage that is equal to mid-supply. ...

Page 20

LTC6603 APPLICATIONS INFORMATION CIRCUIT – IN CIRCUIT B V SUPPLY 0.1μ – IN 3.3V 0.1μ IN1 – Figure 13. Two Devices in a Master/Slave Clocking Confi guration SUPPLY ...

Page 21

APPLICATIONS INFORMATION results in four matched fi lter channels, all synchronized to the same clock. The master has its CLKCNTL pin pulled confi guring its CLKIO pin as an output, while the D slave has its CLKCNTL ...

Page 22

LTC6603 APPLICATIONS INFORMATION the LTC6603 for the lowest cutoff frequency (LPF1 = 0, LFP0 = 0) reduces the supply current by about 60%. Power supply current vs. cutoff frequency for various bandwidth settings is shown in the Typical Performance Characteris- ...

Page 23

... RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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 24

... OCM 56nH* 49.9Ω CAP CLKCNTL 11 GAIN1 SDO 10 GAIN0(D0) SDI 9 GND LPFO(SCLK GND LPF1(CS) , SO-8 Differential Inputs C , SO-8 Differential Inputs C = 2.375V to 12. 0709 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 10pF I OUT 10pF 10pF Q OUT 10pF 6603 TA04 6603fa ...

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