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General Description
The MAX7409/MAX7410/MAX7413/MAX7414 5th-order,
lowpass, switched-capacitor filters (SCFs) operate from
a single +5V (MAX7409/MAX7410) or +3V (MAX7413/
MAX7414) supply. These devices draw only 1.2mA of
supply current and allow corner frequencies from 1Hz
to 15kHz, making them ideal for low-power post-DAC
filtering and anti-aliasing applications. They feature a
shutdown mode, which reduces the supply current to
0.2µA.
Two clocking options are available on these devices:
self-clocking (through the use of an external capacitor)
or external clocking for tighter corner-frequency control.
An offset adjust pin allows for adjustment of the DC out-
put level.
The MAX7409/MAX7413 Bessel filters provide low over-
shoot and fast settling, while the MAX7410/MAX7414
Butterworth filters provide a maximally flat passband
response. Their fixed response simplifies the design
task to selecting a clock frequency.
Applications
ADC Anti-Aliasing CT2 Base Stations
DAC Postfiltering Speech Processing
Air-Bag Electronics
Features
5th-Order Lowpass Filters
Bessel Response (MAX7409/MAX7413)
Butterworth Response (MAX7410/MAX7414)
Clock-Tunable Corner Frequency (1Hz to 15kHz)
Single-Supply Operation
+5V (MAX7409/MAX7410)
+3V (MAX7413/MAX7414)
Low Power
1.2mA (operating mode)
0.2µA (shutdown mode)
Available in 8-Pin µMAX/DIP Packages
Low Output Offset: ±4mV
MAX7409/MAX7410/MAX7413/MAX7414
5th-Order, Lowpass,
Switched-Capacitor Filters
________________________________________________________________
Maxim Integrated Products
1
OS
OUTV
DD
1
2
8
7
CLK
SHDNIN
GND
COM
µMAX/DIP
TOP VIEW
3
4
6
5
MAX7409
MAX7410
MAX7413
MAX7414
V
DD
IN
CLK
OUT
GND
INPUT
0.1µF
0.1µF
CLOCK
SHDN
OUTPUT
V
SUPPLY
COM
OS
MAX7409
MAX7410
MAX7413
MAX7414
Typical Operating Circuit
19-4766; Rev 1; 9/98
Pin Configuration
Ordering Information
PART FILTER RESPONSE
OPERATING
VOLTAGE (V)
MAX7409 Bessel +5
MAX7410 Butterworth +5
Selector Guide
PART
MAX7409CPA
MAX7409EUA
MAX7409EPA -40°C to +85°C
-40°C to +85°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7410CUA
MAX7410CPA
MAX7410EUA
MAX7410EPA -40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C 8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
Ordering Information continued at end of data sheet.
MAX7413 Bessel +3
MAX7414 Butterworth +3
MAX7409CUA
0°C to +70°C 8 µMAX
MAX7409/MAX7410/MAX7413/MAX7414
5th-Order, Lowpass,
Switched-Capacitor Filters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX7409/MAX7410
(V
DD
= +5V, filter output measured at OUT, 10k|| 50pF load to GND at OUT, OS = COM, 0.1µF capacitor from COM to GND,
SHDN = V
DD
, f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND..............................................................-0.3V to +6V
IN, OUT, COM, OS, CLK, SHDN ................-0.3V to (V
DD
+ 0.3V)
OUT Short-Circuit Duration...................................................1sec
Continuous Power Dissipation (T
A
= +70°C)
8-Pin DIP (derate 9.09mW/°C above +70°C)...............727mW
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
Operating Temperature Ranges
MAX74 _ _C_A ...................................................0°C to +70°C
MAX74 _ _E_A ................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
C
OSC
= 1000pF (Note 3)
V
OS
= 0 to V
DD
SHDN = GND, V
COM
= 0 to V
DD
(Note 1)
Input, COM externally driven
OS to OUT
Input, OS externally driven
f
IN
= 200Hz, V
IN
= 4Vp-p,
measurement bandwidth = 22kHz
V
IN
= V
COM
= V
DD
/ 2
V
COM
= V
DD
/ 2 (Note 2)
Output, COM unconnected
CONDITIONS
21 30 38f
OSC
Internal Oscillator Frequency
±0.1 ±10Input Leakage Current at OS
±0.1 ±10Input Leakage Current at COM
50 500C
L
10 1R
L
Resistive Output Load Drive
5Clock Feedthrough
110 180R
COM
Input Resistance at COM
V
COM
±0.1V
OS
2.3 2.5 2.7
100:1f
CLK
/ f
c
Clock-to-Corner Ratio
0.001 to 15f
c
Corner Frequency
V
COM
1A
OS
Offset Voltage Gain
-85
THD+N
Total Harmonic Distortion
plus Noise
10Clock-to-Corner Tempco
0.25 V
DD
-
0.25Output Voltage Range
±4 ±25V
OFFSET
Output Offset Voltage
-0.2 0 0.2
DC Insertion Gain with
Output Offset Removed
MIN TYP MAX
SYMBOLPARAMETER
V
CLK
= 0 or 5V
0.5V
IL
Clock Input Low
4.5V
IH
Clock Input High
±13.5 ±20I
CLK
Clock Output Current
(Internal Oscillator Mode)
V
V
µA
kHz
µA
µA
pF
k
mVp-p
k
V
V
V/V
dB
dB
mV
V
ppm/°C
kHz
UNITS
Maximum Capacitive Output
Load Drive
FILTER CHARACTERISTICS
CLOCK
MAX7409
MAX7410 -78
COM Voltage Range
2.0 2.5 3.0
Input Voltage Range at OS
MAX7409/MAX7410/MAX7413/MAX7414
5th-Order, Lowpass,
Switched-Capacitor Filters
_______________________________________________________________________________________ 3
5th-Order, Lowpass,
Switched-Capacitor Filters
ELECTRICAL CHARACTERISTICS—MAX7409/MAX7410
(V
DD
= +5V, filter output measured at OUT, 10k|| 50pF load to GND at OUT, OS = COM, 0.1µF capacitor from COM to GND,
SHDN = V
DD
, f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS—MAX7413/MAX7414
(V
DD
= +3V, filter output measured at OUT pin, 10k|| 50pF load to GND at OUT, OS = COM, 0.1µF capacitor from COM to GND,
SHDN = V
DD
, f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MIN TYP MAX
SYMBOLPARAMETER
IN = COM (Note 4)
SHDN = GND
Operating mode, no load
0.5V
SDL
SHDN Input Low
4.5V
SDH
SHDN Input High
70PSRRPower-Supply Rejection Ratio
0.2 1I
SHDN
Shutdown Current
1.2 1.5Supply Current I
DD
4.5 5.5V
DD
Supply Voltage
V
V
dB
µA
mA
V
UNITS
SHDN Input Leakage Current V
SHDN
= 0 to V
DD
±0.2 ±10 µA
POWER REQUIREMENTS
SHUTDOWN
µA±0.1 ±10V
OS
= 0 to V
DD
Input Leakage Current at OS
µA±0.1 ±10
SHDN = GND, V
COM
= 0 to V
DD
Input Leakage Current at COM
Maximum Capacitive Output
Load Drive
UNITS
kHz
ppm/°C
V
mV
dB
dB
V/V
V
V
mVp-p
k
pF
PARAMETER SYMBOL MIN TYP MAX
DC Insertion Gain with
Output Offset Removed
-0.2 0 +0.2
Output Offset Voltage V
OFFSET
±4 ±25
Output Voltage Range 0.25 V
DD
-
0.25
Clock-to-Corner Tempco 10
Total Harmonic Distortion
plus Noise
THD+N
-83
Offset Voltage Gain A
OS
1
Corner Frequency f
C
0.001 to 15
Clock-to-Corner Ratio f
CLK
/
f
C
100:1
COM Voltage Range V
COM
1.4 1.5 1.6
V
COM
±0.1
Clock Feedthrough 3
Resistance Output Load Drive R
L
10 1
C
L
50 500
CONDITIONS
V
COM
= V
DD
/ 2 (Note 2)
V
IN
= V
COM
= V
DD
/ 2
f
IN
= 200Hz, V
IN
= 2.5Vp-p,
measurement bandwidth = 22kHz
Input, COM externally driven
OS to OUT
Input, OS externally driven
(Note 1)
1.4 1.5 1.6
kInput Resistance at COM R
COM
110 180
Input Voltage Range at OS V
OS
MAX7413
MAX7414 -81
FILTER CHARACTERISTICS
VOutput, COM unconnected

MAX7410CUA+

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Active Filter 5th-Order Lowpass Elliptic Filter
Lifecycle:
New from this manufacturer.
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