For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
General Description
The MAX7408/MAX7411/MAX7412/MAX7415 5th-order,
lowpass, elliptic, switched-capacitor filters (SCFs) oper-
ate from a single +5V (MAX7408/MAX7411) or +3V
(MAX7412/MAX7415) supply. The 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
can be put into a low-power mode, reducing supply
current to 0.2µA.
Two clocking options are available: self-clocking (through
the use of an external capacitor) or external clocking for
tighter cutoff-frequency control. An offset-adjust pin
allows for adjustment of the DC output level.
The MAX7408/MAX7412 deliver 53dB of stopband
rejection and a sharp rolloff with a transition ratio of 1.6.
The MAX7411/MAX7415 achieve a sharper rolloff with a
transition ratio of 1.25 while still providing 37dB of stop-
band rejection. Their fixed response limits the design
task to selecting a clock frequency.
Applications
ADC Anti-Aliasing CT2 Base Stations
Post-DAC Filtering Speech Processing
Features
o 5th-Order, Elliptic Lowpass Filters
o Low Noise and Distortion: -80dB THD + Noise
o Clock-Tunable Corner Frequency (1Hz to 15kHz)
o Single-Supply Operation
+5V (MAX7408/MAX7411)
+3V (MAX7412/MAX7415)
o Low Power
1.2mA (operating mode)
0.2µA (shutdown mode)
o Available in 8-Pin µMAX/DIP Packages
o Low Output Offset: ±4mV
MAX7408/MAX7411/MAX7412/MAX7415
5th-Order, Lowpass, Elliptic,
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
MAX7408
MAX7411
MAX7412
MAX7415
V
DD
IN
CLK
OUT
GND
INPUT
0.1µF
0.1µF
CLOCK
SHDN
OUTPUT
COM
OS
MAX7408
MAX7411
MAX7412
MAX7415
V
SUPPLY
Typical Operating Circuit
19-1378; Rev 1; 10/98
Pin Configuration
Ordering Information
PART
MAX7408CPA
MAX7408CUA
MAX7408EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7408EUA
MAX7415CPA
MAX7415CUA
MAX7415EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C 8 µMAX
8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7415EUA -40°C to +85°C 8 µMAX
PART
TRANSITION RATIO
OPERATING
VOLTAGE (V)
MAX7408 r = 1.6 +5
MAX7411 r = 1.25 +5
Selector Guide
MAX7412 r = 1.6 +3
MAX7415 r = 1.25 +3
MAX7411CPA
MAX7411CUA
MAX7411EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C 8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7411EUA -40°C to +85°C 8 µMAX
MAX7412CPA
MAX7412CUA
MAX7412EPA -40°C to +85°C
0°C to +70°C
0°C to +70°C 8 Plastic DIP
8 µMAX
8 Plastic DIP
MAX7412EUA -40°C to +85°C 8 µMAX
EVALUATION KIT
AVAILABLE
MAX7408/MAX7411/MAX7412/MAX7415
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX7408/MAX7411
(V
DD
= +5V; filter output measured at OUT, 10k || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to GND,
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 6.90mW/°C above +70°C)...............552mW
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)
T
A
= +25°C
Input, COM externally driven
OS to OUT
Measured with respect to COM
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 internally driven
CONDITIONS
19 27 34f
OSC
Internal Oscillator Frequency
±0.2 ±10Input Leakage Current at OS
±0.2 ±10Input Leakage Current at COM
50 500C
L
10 1R
L
Resistive Output Load Drive
5Clock Feedthrough
110 180R
COM
Input Resistance at COM
±0.1V
OS
Input Voltage Range at OS
V
DD
- 0.2
V
DD
V
DD
+ 0.2
2 2 2
100:1f
CLK
/f
C
Clock-to-Corner Ratio
0.001 to 15f
C
Corner-Frequency Range
V
DD
- 0.5
V
DD
V
DD
+ 0.5
2 2 2
V
COM
COM Voltage Range
1A
OS
Offset Voltage Gain
-81THD+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 0.2 0.4
DC Insertion Gain with Output
Offset Removed
MIN TYP MAXSYMBOLPARAMETER
0.5V
IL
Clock Input Low
4.5V
IH
Clock Input High
±12 ±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 Load
at OUT
FILTER
CLOCK
MAX7408/MAX7411/MAX7412/MAX7415
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—MAX7408/MAX7411 (continued)
(V
DD
= +5V; filter output measured at OUT, 10k || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to GND,
f
CLK
= 100kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
ELECTRICAL CHARACTERISTICS—MAX7412/MAX7415
(V
DD
= +3V, filter output measured at OUT pin, 10k || 50pF load to GND at OUT, SHDN = V
DD
, OS = COM, 0.1µF from COM to
GND, f
CLK
= 100kHz; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
MIN TYP MAXSYMBOLPARAMETER
Measured at DC
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
1.16 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
V
OS
Input Voltage Range at OS
110 180R
COM
Input Resistance at COM k
(Note 1)
T
A
= +25°C
Measured with respect to COM
OS to OUT
f
IN
= 200Hz, V
IN
= 2.5Vp-p,
measurement bandwidth = 22kHz
V
IN
= V
COM
= V
DD
/ 2
V
COM
= V
DD
/ 2 (Note 2)
CONDITIONS
50 500C
L
10 1R
L
Resistance Output Load Drive
3Clock Feedthrough
±0.1
V
DD
- 0.1
V
DD
V
DD
+ 0.1
2 2 2
V
COM
COM Voltage Range
100:1f
CLK
/
f
C
Clock-to-Corner Ratio
0.001 to 15f
C
Corner-Frequency Range
1A
OS
Offset Voltage Gain
-79THD+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 0.2 0.4
DC Insertion Gain with Output
Offset Removed
MIN TYP MAXSYMBOLPARAMETER
pF
k
mVp-p
V
V
V/V
dB
dB
mV
V
ppm/°C
kHz
UNITS
Maximum Capacitive Load
at OUT
Input Leakage Current at COM
SHDN = GND, V
COM
= 0 to V
DD
±0.2 ±10 µA
Input Leakage Current at OS V
OS
= 0 to V
DD
±0.2 ±10 µA
POWER REQUIREMENTS
SHUTDOWN
FILTER CHARACTERISTICS

MAX7408CPA+

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Active Filter 5th-Order Lowpass Elliptic Filter
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union