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LTC1562CG-2#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1562-2
15622fa
Very Low Noise, Low Distortion
Active RC Quad Universal Filter
The LTC
®
1562-2 is a low noise, low distortion continuous
time filter with rail-to-rail inputs and outputs, optimized for a
center frequency (f
O
) of 20kHz to 300kHz. 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’s
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 LTC1562-2 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 90dB signal-to-noise
ratio from a single 5V power supply. Low level signals can
exploit the built-in gain capability of the LTC1562-2. Varying
the gain of a section can achieve a dynamic range as high as
114dB with a ±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.
■
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
■
Continuous Time—No Clock
■
Four 2nd Order Filter Sections, 20kHz to 300kHz
Center Frequency
■
Butterworth, Chebyshev, Elliptic or Equiripple
Delay Response
■
Lowpass, Bandpass, Highpass Responses
■
99dB Typical S/N, ±5V Supply (Q = 1)
■
93dB Typical S/N, Single 5V Supply (Q = 1)
■
Rail-to-Rail Input and Output Voltages
■
DC Accurate to 3mV (Typ)
■
±0.5% Typical Center Frequency Accuracy
■
“Zero-Power” Shutdown Mode
■
Single or Dual Supply, 5V to 10V Total
■
Resistor-Programmable f
O
, Q, Gain
Dual 4th Order 200kHz Butterworth Lowpass Filter, SNR 96dB
R
IN2
7.87k
R
Q2
10.2k
R22 7.87k
R24 7.87k
R
Q4
10.2k
R
IN4
7.87k
R
Q3
4.22k
R23 7.87k
R
IN3
7.87k
R
Q1
4.22k
R21 7.87k
R
IN1
7.87k
V
IN2
V
IN1
5V
0.1µF
0.1µF
–5V*
V
OUT1
V
OUT2
1562-2 TA01
*V
–
ALSO AT PINS 4, 7, 14 & 17
ALL RESISTORS 1% METAL FILM
20
19
18
16
15
13
12
11
1
2
3
5
6
8
9
10
INV C
V1 C
V2 C
V
–
AGND
V2 D
V1 D
INV D
INV B
V1 B
V2 B
V
+
SHDN
V2 A
V1 A
INV A
LTC1562-2
GAIN (dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
50k
1.5M1M
1562-2 TA02
FREQUENCY (Hz)
100k
Amplitude Response
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
2
LTC1562-2
15622fa
ORDER PART
NUMBER
LTC1562CG-2
LTC1562IG-2
(Note 1)
Total Supply Voltage (V
+
to V
–
) .............................. 11V
Maximum Input Voltage
at Any Pin ....................(V
–
– 0.3V) ≤ V ≤ (V
+
+ 0.3V)
Storage Temperature Range ................. –65°C to 150°C
Operating Temperature Range
LTC1562C-2 ............................................ 0°C to 70°C
LTC1562I-2 ........................................ –40°C to 85°C
Lead Temperature (Soldering, 10 sec).................. 300°C
T
JMAX
= 150°C, θ
JA
= 136°C/W
TOP VIEW
G PACKAGE
20-LEAD PLASTIC SSOP
*G PACKAGE PINS 4, 7, 14, 17 ARE
SUBSTRATE/SHIELD CONNECTIONS
AND MUST BE TIED TO V
–
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
INV B
V1 B
V2 B
V
–*
V
+
SHDN
V
–*
V2 A
V1 A
INV A
INV C
V1 C
V2 C
V
–*
V
–
AGND
V
–*
V2 D
V1 D
INV D
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
S
Total Supply Voltage 4.75 10.5 V
I
S
Supply Current V
S
= ±2.375V, R
L
= 5k, C
L
= 30pF, Outputs at 0V 21 23.5 mA
V
S
= ±5V, R
L
= 5k, C
L
= 30pF, Outputs at 0V 22.5 25 mA
V
S
= ±2.375V, R
L
= 5k, C
L
= 30pF, Outputs at 0V ● 28 mA
V
S
= ±5V, R
L
= 5k, C
L
= 30pF, Outputs at 0V ● 30 mA
Output Voltage Swing, V2 Outputs V
S
= ±2.375V, R
L
= 5k, C
L
= 30pF ● 4.2 4.6 V
P-P
V
S
= ±5V, R
L
= 5k, C
L
= 30pF ● 9.3 9.8 V
P-P
Output Voltage Swing, V1 Outputs V
S
= ±2.375V, R
L
= 5k, C
L
= 30pF, f = 250kHz 4.5 V
P-P
V
S
= ±5V, R
L
= 5k, C
L
= 30pF, f = 250kHz 8.4 9.7 V
P-P
V
OS
DC Offset Magnitude, V2 Outputs V
S
= ±2.375V, Input at AGND Voltage 3 17 mV
V
S
= ±5V, Input at AGND Voltage 3 17 mV
DC AGND Reference Point V
S
= Single 5V Supply 2.5 V
Center Frequency (f
O
) Error (Notes 2, 3) V
S
= ±5V, V2 Output Has R
L
= 5k, C
L
= 30pF 0.5 1.7 %
H
L
Lowpass Passband Gain at V2 Output V
S
= ±2.375V, f
IN
= 10kHz, ● 0 +0.05 +0.1 dB
V2 Output Has R
L
= 5k, C
L
= 30pF
Q Accuracy V
S
= ±2.375V, V2 Output Has R
L
= 5k, C
L
= 30pF +2 %
Wideband Output Noise V
S
= ±2.375V, BW = 400kHz, Input AC GND 39 µV
RMS
V
S
= ±5V, BW = 400kHz, Input AC GND 39 µV
RMS
Input-Referred Noise, Gain = 100 BW = 400kHz, f
O
= 200kHz, Q = 1, Input AC GND 7.3 µV
RMS
The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
S
= ±5V, outputs unloaded, SHDN pin to logic “low”, unless otherwise noted. AC
specs are for a single 2nd order section, R
IN
= R2 = 10.4k ±0.1%, R
Q
= 9.09k ±0.1%, f
O
= 175kHz.
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
3
LTC1562-2
15622fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
THD Total Harmonic Distortion, V2 Output f
IN
= 20kHz, 2.8V
P-P
, V1 and V2 Outputs Have –100 dB
R
L
= 5k, C
L
= 30pF
f
IN
= 20kHz, 9V
P-P
, V1 and V2 Outputs Have –82 dB
R
L
= 5k, C
L
= 30pF
Shutdown Supply Current SHDN Pin to V
+
1.5 15 µA
SHDN Pin to V
+
, V
S
= ±2.375V 1.0 µA
Shutdown-Input Logic Threshold 2.5 V
Shutdown-Input Bias Current SHDN Pin to 0V –10 –20 µA
Shutdown Delay SHDN Pin Steps from 0V
to V
+
20 µs
Shutdown Recovery Delay SHDN Pin Steps from V
+
to 0V 100 µs
Inverting Input Bias Current, Each Biquad 5 pA
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: f
O
change from ±5V to ±2.375 supplies is –0.2% typical,
f
O
temperature coefficient magnitude, 25°C to 85°C, is
50ppm/°C typical.
As with the LTC1562, f
O
decreases with increasing temperature.
Note 3: Tighter frequency tolerance is available, consult factory.
The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
S
= ±5V, outputs unloaded, SHDN pin to logic “low”, unless otherwise noted. AC
specs are for a single 2nd order section, R
IN
= R2 = 10.4k ±0.1%, R
Q
= 9.09k ±0.1%, f
O
= 175kHz.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
f
O
Error vs Nominal f
O
(V
S
= ±5V)
f
O
Error vs Nominal f
O
(V
S
= ±2.5V)
NOMINAL f
O
(kHz)
100
Q ERROR (%)
35
40
45
30
25
20
15
10
5
0
–5
260
1562-2 G03
140 180 220 300240120 160 200 280
T
A
= 70°C
T
A
= 25°C
R
IN
= R
Q
Q = 5
Q = 2.5
Q = 1
Q Error vs Nominal f
O
(V
S
= ±5V)
NOMINAL f
O
(kHz)
120
f
O
ERROR (%)
0
1.0
2.0
1.5
3.0
2.5
1562-2 G01
–1.0
–2.0
–0.5
0.5
–1.5
–2.5
–3.0
160 200 240 280260140 180 220
Q = 5
Q = 2.5
Q = 1
T
A
= 25°C
R
IN
= R
Q
NOMINAL f
O
(kHz)
120
f
O
ERROR (%)
0
1.0
2.0
1.5
3.0
2.5
1562-2 G02
–1.0
–2.0
–0.5
0.5
–1.5
–2.5
–3.0
160 200 240 280260140 180 220
Q = 5
Q = 2.5
Q = 1
T
A
= 25°C
R
IN
= R
Q
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC1562CG-2#TRPBF

Mfr. #:
Buy LTC1562CG-2#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Active Filter Active RC Quad Universal Filter
Lifecycle:
New from this manufacturer.
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