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LTC6603IUF#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
LTC6603
1
6603fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual Adjustable
Lowpass Filter
The LTC
®
6603 is a dual, matched, programmable lowpass
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.
2.5MHz I and Q Lowpass Filter and Dual ADC
n
Guaranteed Phase and Gain Matching Specs
n
Programmable BW Up to 2.5MHz
n
Programmable Gain (0dB/6dB/12dB/24dB)
n
9th Order Linear Phase Response
n
Differential, Rail-to-Rail Inputs and Outputs
n
Low Noise: –145dBm/Hz (Input Referred)
n
Low Distortion: –75dBc at 200kHz
n
Simple Pin Programming or SPI Interface
n
Set the Max Speed/Power with an External R
n
Operates from 2.7V to 3.6V
n
Input Range from 0V to 5.5V
n
4mm × 4mm QFN Package
n
Small/Low Cost Basestations:
IDEN, PHS, TD-SCDMA, CDMA2000, WCDMA,
UMTS
n
Low Cost Repeaters, Radio Links, and Modems
n
802.11x Receivers
n
JTRS
6603 TA01a
+INA
V+
IN
V+
A
V+
D
–INA
+INB
–INB
CAP
GAIN1
GAIN0
GND
GND
R
BIAS
V
OCM
+OUTA
–OUTA
+OUTB
–OUTB
CLKCNTL
SDO
SDI
LPFO
LPF1
CLKIO
SER
LTC6603
0.1µF 0.1µF
180pF
180pF
10pF
10pF
180pF
180pF
10pF
10pF
49.9Ω
100nH*
*COILCRAFT 0603HP
49.9Ω
100nH*
49.9Ω
100nH*
49.9Ω
100nH*
5V 3V
3V
3V
0.1µF
0.1µF
30.9k
2.2µF
BASEBAND
GAIN CONTROL
LTC2297
14-BIT
ADC
14-BIT
ADC
V
CM
I
IN
Q
IN
I OUTPUT
Q OUTPUT
MISMATCH (DEG)
UNITS (%)
6603 TA01b
60
50
20
10
30
40
0
–2.5 2.5–2 –1.5 –1 –0.5 0 0.5 1 1.5 2
V
S
= 3V, BW = 156.25kHz
f = 125kHz, T
A
= 25°C
1000 UNITS
Phase Matching
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.
LTC6603
2
6603fa
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
V+
IN
to GND ................................................................6V
V+
A
, V+
D
to GND .........................................................4V
V+
A
to V+
D
.............................................. –0.3V to +0.3V
Filter Inputs to GND ....................... –0.3V to V+
IN
+ 0.3V
Pins 3, 4 to GND ............................. –0.3V to V+
A
+ 0.3V
Pins 5, 6, 9-11,
15, 17, 21, 22 to GND .....................–0.3V to V+
D
+ 0.3V
Output Short-Circuit Duration .......................... Indefi nite
Operating Temperature Range (Note 2)
LTC6603CUF .......................................–40°C TO 85°C
LTC6603IUF ........................................–40°C TO 85°C
Specifi ed Temperature Range (Note 3)
LTC6603CUF ...........................................0°C TO 70°C
LTC6603IUF ........................................–40°C TO 85°C
Storage Temperature Range ................... –65°C to 150°C
(Note 1)
24 23 22 21 20 19
7 8 9
TOP VIEW
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18
V+
IN
V+
A
V
OCM
R
BIAS
CLKCNTL
LPF1(CS)
–OUTA
SER
V+
D
CLKIO
GND
+OUTB
+INA
–INA
GAIN1
GAIN0(D0)
CAP
+OUTA
+INB
–INB
LPFO(SCLK)
SDI
SDO
–OUTB
25
T
JMAX
= 150°C, θ
JA
= 37°C/W, θ
JC
= 4.3°C/W
EXPOSED PAD (PIN 25) IS GND. MUST BE SOLDERED TO THE PCB.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Filter Gain Either
Channel
External Clock = 80MHz, Filter Cutoff (f
C
)= 156.25kHz, V
IN
= 3.6V
P-P,
Pin 3 Open
DC Gain, Gain Set = 0dB
f
IN
= 62.5kHz (0.4 • f
C
), Relative to DC Gain
f
IN
= 125kHz (0.8 • f
C
), Relative to DC Gain
f
IN
= 156.25kHz (f
C
), Relative to DC Gain
f
IN
= 234.375kHz (1.5 • f
C
), Relative to DC Gain
l
l
l
l
l
0.25
–0.5
0.4
–0.6
0.4
–0.3
0.6
–0.4
–32
0.55
–0.1
0.8
–0.2
–29.5
dB
dB
dB
dB
dB
Matching of Filter
Gain
External Clock = 80MHz, Filter Cutoff (f
C
)= 156.25kHz, V
IN
= 3.6V
P-P,
Pin 3 Open
DC Gain, Gain Set = 0dB
f
IN
= 62.5kHz (0.4 • f
C
)
f
IN
= 125kHz (0.8 • f
C
)
f
IN
= 156.25kHz (f
C
)
l
l
l
l
±0.03
±0.03
±0.03
±0.03
±0.1
±0.1
±0.1
±0.15
dB
dB
dB
dB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC6603CUF#PBF LTC6603CUF#TRPBF 6603
24-Lead (4mm × 4mm) Plastic QFN
0°C to 70°C
LTC6603IUF#PBF LTC6603IUF#TRPBF 6603
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V+
A
= V+
D
= V+
IN
= 3V, V
ICM
= V
OCM
= 1.5V, Gain = 0dB, lowpass
cutoff = 2.5MHz, internal clocking with R
BIAS
= 30.9k unless otherwise noted.
LTC6603
3
6603fa
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V+
A
= V+
D
= V+
IN
= 3V, V
ICM
= V
OCM
= 1.5V, Gain = 0dB, lowpass
cutoff = 2.5MHz, internal clocking with R
BIAS
= 30.9k unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Filter Phase Either
Channel
External Clock = 80MHz, Filter Cutoff (f
C
) = 156.25kHz, V
IN
= 3.6V
P-P,
Pin 3 Open
f
IN
= 62.5kHz (0.4 • f
C
)
f
IN
= 125kHz (0.8 • f
C
)
f
IN
= 156.25kHz (f
C
)
l
l
l
158
–44
–152
161
–39
–146
163
–36
–142
deg
deg
deg
Matching of Filter
Phase
External Clock = 80MHz, Filter Cutoff (f
C
) = 156.25kHz, V
IN
= 3.6V
P-P,
Pin 3 Open
f
IN
= 62.5kHz (0.4 • f
C
)
f
IN
= 125kHz (0.8 • f
C
)
f
IN
= 156.25kHz (f
C
)
l
l
l
±0.2
±0.4
±0.5
±1.5
±3
±4
deg
deg
deg
Filter Gain Either
Channel
External Clock = 80MHz, Filter Cutoff (f
C
) = 2.5MHz, V
IN
= 3.6V
P-P,
Pin 3 Open
DC Gain, Gain Set = 0dB
f
IN
= 1MHz (0.4 • f
C
), Relative to DC Gain
f
IN
= 2MHz (0.8 • f
C
), Relative to DC Gain
f
IN
= 2.5MHz (f
C
), Relative to DC Gain
f
IN
= 4MHz (1.5 • f
C
), Relative to DC Gain
l
l
l
l
l
0
–2
–0.7
–1.1
0.5
–0.8
0.4
0.1
–43
1.2
–0.1
1.5
1
–32.6
dB
dB
dB
dB
dB
Matching of Filter
Gain
External Clock = 80MHz, Filter Cutoff (f
C
) = 2.5MHz, V
IN
= 3.6V
P-P,
Pin 3 Open
f
IN
= 2MHz (0.8 • f
C
)
f
IN
= 2.5MHz (f
C
)
l
l
±0.05
±0.2
±0.2
±0.4
dB
dB
Filter Phase
Either Channel
External Clock = 80MHz, Filter Cutoff (f
C
) = 2.5MHz, V
IN
= 3.6V
P-P,
Pin 3 Open
f
IN
= 1MHz (0.4 • f
C
)
f
IN
= 2MHz (0.8 • f
C
)
f
IN
= 2.5MHz (f
C
)
l
l
l
150
–45
–152
155
–39
–141
159
–28
–126
deg
deg
deg
Matching of Filter
Phase
External Clock = 80MHz, Filter Cutoff (f
C
) = 2.5MHz, V
IN
= 3.6V
P-P,
Pin 3 Open
f
IN
= 1MHz (0.4 • f
C
)
f
IN
= 2MHz (0.8 • f
C
)
f
IN
= 2.5MHz (f
C
)
l
l
l
±2.5
±4
±4
deg
deg
deg
Filter Cutoff Accuracy
when Self Clocked
CLKCNTL = 3V (Note 4)
R
BIAS
= 200k
R
BIAS
= 54.9k
R
BIAS
= 30.9k
l
l
l
±3
±3
±3.5
%
%
%
DC Gain Filter Cutoff (f
C
) = 2.5MHz, 0.6V to 2.4V Each Output,
Pin 3 Open
Gain Setting = 0dB
Gain Setting = 6dB
Gain Setting = 12dB
Gain Setting = 24dB
l
l
l
l
0
5.6
11.2
22.5
0.5
6
11.8
23.2
1.2
6.6
12.5
24
dB
dB
dB
dB
DC Gain Matching Filter Cutoff (f
C
) = 2.5MHz, 0.6V to 2.4V Each Output,
Pin 3 Open
Gain Setting = 0dB
Gain Setting = 6dB
Gain Setting = 12dB
Gain Setting = 24dB
l
l
l
l
±0.1
±0.05
±0.05
±0.1
±0.2
±0.1
±0.15
±0.2
dB
dB
dB
dB
Noise At 200kHz Voltage Noise Referred to the Input
Gain = 0dB
Gain = 6dB
Gain = 12dB
Gain = 24dB
–124
–129
–135
–145
dBm/Hz
dBm/Hz
dBm/Hz
dBm/Hz
Integrated Noise Noise Bandwidth = 5MHz, Referred to the Input
Gain = 0dB
Gain = 6dB
Gain = 12dB
Gain = 24dB
–53
–59
–65
–76
dBm
dBm
dBm
dBm
THD V
IN
= 2V
P-P
, f
IN
= 200kHz, Gain Setting = 24dB –75 dB
Input Impedance Gain = 24dB, R
BIAS
= 30.9k, Filter Cutoff (f
C
) = 2.5MHz
Differential
Common Mode
1.6
5
k
k
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

LTC6603IUF#PBF

Mfr. #:
Buy LTC6603IUF#PBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter Dual Programmable 2.5MHz Filter for Communications
Lifecycle:
New from this manufacturer.
Delivery:
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