LTC1564IG#PBF Linear Technology, LTC1564IG#PBF Datasheet

IC ANTIALIASING FILTER 16-SSOP

LTC1564IG#PBF

Manufacturer Part Number
LTC1564IG#PBF
Description
IC ANTIALIASING FILTER 16-SSOP
Manufacturer
Linear Technology
Datasheet

Specifications of LTC1564IG#PBF

Filter Type
Antialiasing
Frequency - Cutoff Or Center
150kHz
Number Of Filters
1
Max-order
8th
Voltage - Supply
2.7 V ~ 10.5 V
Mounting Type
Surface Mount
Package / Case
16-SSOP
Ic Filter Type
Lowpass
Filter Order
8th
No. Of Filters
1
Cutoff Frequency
150kHz
Supply Voltage Range
2.7V To 10.5V
Operating Temperature Range
-40°C To +85°C
Filter Ic Case Style
SSOP
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Antialias or Reconstruction Filtering
DSP Systems
Communications Systems
Scientific Instruments
High Resolutions (16 Bits to 20 Bits)
Processing Signals Buried in Noise
Audio Signal Processing
Programmable Data Rates
Automatic Gain Control (AGC)
Single Part Replacing Multiple Filters
4-Bit Digitally Controlled 8th-Order Lowpass Filter
– f
– 100dB Attenuation at 2.5 × f
4-Bit Digitally Controlled Programmable Gain
Amplifier
– G = 1 to 16 in 1V/V Steps
Miniature 16-Pin SSOP Package
No External Components
122dB Total System Dynamic Range
Rail-to-Rail Input and Output Range
2.7V to 10V Operation
Low Noise Mute Mode
Low Power Shutdown Mode
Available in 16-Lead Plastic SSOP Package
Steps
CUTOFF
ANALOG
ANALOG
OUT
IN
Adjustable from 10kHz to 150kHz in 10kHz
Low Noise Programmable Filter with Variable Gain
OUT V
IN AGND V
16
1
V
15
2
0.1µF
U
EN
V
+
+
14
3
0.1µF
HOLD F3
RST G3
LTC1564
CS/
1564 TA01
13
4
FREQUENCY CODE
12
5
GAIN CODE
G2
F2
11
6
G1
F1
U
10
7
CUTOFF
G0
F0
9
8
V
1.35V TO 5.25V EACH
TIE F AND G PINS TO V
SET FREQUENCY AND GAIN
DYNAMIC RANGE 118dB TO 122dB
AT ± 5V DEPENDING ON FREQUENCY CODE
+
AND V
SUPPLIES CAN BE FROM
+
OR V
Antialiasing Filter and 4-Bit P.G.A.
TO
DESCRIPTIO
The LTC
antialiasing, reconstruction and other band-limiting appli-
cations. No other analog components or filter expertise are
needed to use it. There is one analog input pin and one
analog output pin. The cutoff frequency (f
programmable while the shape of the lowpass response is
fixed. A latching digital interface stores f
or it can be bypassed for control directly from the pins. The
LTC1564 operates from 2.7V to 10V total (single or split
supplies) and comes in a 16-pin surface mount SSOP.
The LTC1564 is a rail-to-rail high resolution 8th-order
lowpass filter with two stopband notches, giving approxi-
mately 100dB attenuation at 2.5 times the passband cutoff
frequency f
Signals with low or variable levels can be normalized with
the built-in variable gain that reduces input-referred noise
with increasing gain for a typical dynamic range (maxi-
mum signal level to minimum noise) of 122dB (20 equiva-
lent bits) with 20kHz f
supply.
Other frequency-response shapes can be provided upon
request. Please contact LTC Marketing.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1564 is a new type of continuous time filter for
C
(a de-facto standard for DSP front ends).
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
30
20
10
0
LTC1564 Programmable Range
U
5
GAIN = 1V/V
Digitally Controlled
C
f
C
and 118dB at 100kHz f
= 10kHz
10
10kHz to 150kHz
FREQUENCY (kHz)
GAIN = 16V/V
f
C
= 150kHz
100
C
and gain settings
LTC1564
C
1564 TA02
) and gain are
500
C
on a ±5V
1564fa
1

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LTC1564IG#PBF Summary of contents

Page 1

... Other frequency-response shapes can be provided upon request. Please contact LTC Marketing. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners – ...

Page 2

LTC1564 ABSOLUTE AXI U RATI GS (Note 1) + – Total Supply Voltage ( .............................. 11V Input Voltage ............................. V Output Short-Circuit Duration .......................... Indefinite Operating Temperature Range LTC1564C .............................................. 0°C to 70°C LTC1564I ...

Page 3

ELECTRICAL CHARACTERISTICS range, otherwise specifications are at T PARAMETER Input Impedance Output Impedance Mute State (F = 0000) Gain Mute State Output Noise Shutdown Supply Current Digital Input “High” Voltage Digital Input “Low” Voltage Digital Input Pull-Up or Pull-Down Current ...

Page 4

LTC1564 W U TYPICAL PERFOR A CE CHARACTERISTICS Passband Roll-Off SINGLE 25°C A –0.25 –0.50 –0.75 –1.00 –1.25 –1. Detail of Stopband ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS THD + Noise vs Input Voltage (f = 100kHz) C –20 –30 3V SUPPLY –40 5V SUPPLY –50 ±5V SUPPLY –60 –70 –80 – 100kHz 10kHz IN –100 ...

Page 6

LTC1564 CTIO S passes the bits directly when the CS/HOLD input is at logic 0. When CS/HOLD changes to logic 1, the F pins cease to have effect and the latch holds the previous values. ...

Page 7

CTIO S Table 3. Summary of LTC1564 Digital Controls and Modes EN RST CS/HOLD ...

Page 8

LTC1564 CTIO S IN (Pin 16): Analog Input. The filter in the LTC1564 senses the voltage difference between the IN and AGND pins. In normal filtering ( RST = 1, F code other ...

Page 9

U U APPLICATIO S I FOR ATIO Functional Description The LTC1564 is a self-contained, continuous time, vari- able gain, high order analog lowpass filter. The gain magnitude between IN and OUT pins is approximately constant for signal frequency components up ...

Page 10

LTC1564 U U APPLICATIO S I FOR ATIO levels that program the part for enabled F and G pins (CS/HOLD = 0), 20kHz f and unity passband gain. There- C fore six connections (power pins logic 0, AGND, ...

Page 11

... 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 2-Chip Flexible DSP Front End with Amplification, Antialias Filtering and A/D Conversion 2.2µ ...

Page 12

... DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE G16 SSOP 0204 = 500kHz or 1MHz = 150kHz (LTC1562), = 300kHz (LTC1562-2) = 256kHz = 64/ 75kHz (LTC1569-6), CUTOFF(MAX) = 32/ 300kHz (LTC1569-7) CUTOFF(MAX) LT/TP 0905 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2001 OUT 7 – V OUT 1564fa ...

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