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LTC1562AIG Datasheet

  • LTC1562AIG

  • Very Low Noise, Low Distortion Active RC Quad Universal Filt...

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LTC1562
Very Low Noise, Low Distortion
Active RC Quad Universal Filter
FEATURES
s
s
DESCRIPTION
The LTC
廬
1562 is a low noise, low distortion continuous-time
filter with rail-to-rail inputs and outputs, optimized for a
center frequency (f
O
) of 10kHz to 150kHz. Unlike most
monolithic filters, no clock is needed. Four independent 2nd
order filter blocks can be cascaded in any combination, such
as one 8th order or two 4th order filters. Each block鈥檚
response is programmed with three external resistors for
center frequency, Q and gain, using simple design formulas.
Each 2nd order block provides lowpass and bandpass out-
puts. Highpass response is available if an external capacitor
replaces one of the resistors. Allpass, notch and elliptic
responses can also be realized.
The LTC1562 is designed for applications where dynamic
range is important. For example, by cascading 2nd order
sections in pairs, the user can configure the IC as a dual 4th
order Butterworth lowpass filter with 94dB signal-to-noise
ratio from a single 5V power supply. Low level signals can
exploit the built-in gain capability of the LTC1562. Varying the
gain of a section can achieve a dynamic range as high as
118dB with a
鹵5V
supply.
Other cutoff frequency ranges can be provided upon request.
Please contact LTC Marketing.
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
s
s
s
s
s
s
s
s
s
s
s
Continuous Time鈥擭o Clock
Four 2nd Order Filter Sections, 10kHz to 150kHz
Center Frequency
鹵0.5%
Typical Center Frequency Accuracy
鹵0.3%
Typical Center Frequency Accuracy (A Grade)
Wide Variety of Response Shapes
Lowpass, Bandpass and Highpass Responses
103dB Typical S/N,
鹵5V
Supply (Q = 1)
97dB Typical S/N, Single 5V Supply (Q = 1)
96dB Typical S/(N + THD) at
鹵5V
Supply, 20kHz Input
Rail-to-Rail Input and Output Voltages
DC Accurate to 3mV (Typ)
鈥淶ero-Power鈥?Shutdown Mode
Single or Dual Supply, 5V to 10V Total
Resistor-Programmable f
O
, Q, Gain
APPLICATIONS
s
s
s
s
s
s
High Resolution Systems (14 Bits to 18 Bits)
Antialiasing/Reconstruction Filters
Data Communications, Equalizers
Dual or I-and-Q Channels (Two Matched 4th Order
Filters in One Package)
Linear Phase Filtering
Replacing LC Filter Modules
TYPICAL APPLICATION
Amplitude Response
Dual 4th Order 100kHz Butterworth Lowpass Filter
R
IN1
10k
V
IN2
R
Q1
, 5.62k
R21, 10k
5V
0.1碌F
R23, 10k
R
IN3
10k
V
IN1
R
IN2
, 10k
1
2
3
5
6
8
9
R
Q3
, 5.62k
10
INV B
V1 B
V2 B
V
+
LTC1562
SHDN
V2 A
V1 A
INV A
INV C
V1 C
V2 C
V
鈥?/div>
20
19 R
Q2
, 13k
GAIN (dB)
18 R22, 10k
16
15
13
12 R24, 10k
11
R
Q4
, 13k
1562 TA01
V
OUT2
鈥?V
0.1碌F
V
OUT1
SCHEMATIC INCLUDES PIN
NUMBERS FOR 20-PIN PACKAGE.
PINS 4, 7, 14, 17 (NOT SHOWN)
ALSO CONNECT TO V
鈥?/div>
SEE TYPICAL APPLICATIONS
FOR OTHER CUTOFF FREQUENCIES
DC ACCURATE, NONINVERTING,
UNITY-GAIN, RAIL-TO-RAIL
INPUT AND OUTPUTS. PEAK
SNR
鈮?/div>
100dB WITH
鹵5V
SUPPLIES
AGND
V2 D
V1 D
INV D
R
IN4
, 10k
U
U
U
10
0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?0
10k
100k
FREQUENCY (Hz)
1M
1562 TA03b
1

LTC1562AIG 產(chǎn)品屬性

  • LTC1562

  • 66

  • 集成電路 (IC)

  • 接口 - 濾波器 - 有源

  • -

  • 通用連續(xù)計時

  • 150kHz

  • 4

  • 8th

  • 4.75 V ~ 10.5 V，±4.75 V ~ 5.25 V

  • 表面貼裝

  • 20-SSOP（0.209"，5.30mm 寬）

  • 20-SSOP

  • 管件

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