MAX7408CUA+ Maxim Integrated Products, MAX7408CUA+ Datasheet - Page 10

• Manufacturer Part Number: MAX7408CUA+
• Description: IC FILTER LOWPASS 5TH 8UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX7408CUA+

• Filter Type: Elliptic, Lowpass Switched Capacitor
• Frequency - Cutoff Or Center: 15kHz
• Number Of Filters: 1
• Max-order: 5th
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• For Use With: MAXFILTERBRD+ - BOARD EVAL MAX7408/7415/418-7425
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5th-Order, Lowpass, Elliptic,
Switched-Capacitor Filters
Characteristics table for the input voltage range of COM
and OS. Changing the voltage on COM or OS signifi-
cantly from mid-supply reduces the dynamic range.
The MAX7408/MAX7411 operate from a single +5V
supply and the MAX7412/MAX7415 operate from a sin-
gle +3V supply. Bypass V
capacitor. If dual supplies are required, connect COM
to the system ground and GND to the negative supply.
Figure 5 shows an example of dual-supply operation.
Single-supply and dual-supply performance are equiv-
alent. For either single-supply or dual-supply operation,
drive CLK and SHDN from GND (V- in dual supply
operation) to V
±2.5, and use the MAX7412/MAX7415 for ±1.5V. For
±5V dual-supply applications, see the MAX291/
MAX292/MAX295/MAX296 and MAX293/MAX294/
MAX297 data sheets.
The optimal input signal range is determined by observ-
ing the voltage level at which the signal-to-noise plus
distortion (SINAD) ratio is maximized for a given corner
frequency. The Typical Operating Characteristics show
the THD+Noise response as the input signal’s peak-to-
peak amplitude is varied.
When using the MAX7408/MAX7411/MAX7412/
MAX7415 for anti-aliasing or post-DAC filtering, syn-
chronize the DAC (or ADC) and the filter clocks. If the
10
Table 1. Typical Harmonic Distortion
MAX7408
MAX7411
MAX7412
MAX7415
______________________________________________________________________________________
FILTER
Anti-Aliasing and Post-DAC Filtering
DD
Input Signal Amplitude Range
. Use the MAX7408/MAX7411 for
(kHz)
f
500
100
500
100
500
100
500
100
CLK
DD
to GND with a 0.1µF
Power Supplies
(Hz)
200
200
200
200
f
1k
1k
1k
1k
IN
(Vp-p)
V
4
4
2
2
clocks are not synchronized, beat frequencies may
alias into the desired passband.
Harmonic distortion arises from nonlinearities within the
filter. These nonlinearities generate harmonics when a
pure sine wave is applied to the filter input. Table 1 lists
typical harmonic distortion values with a 10kΩ load at
T
Figure 5. Dual-Supply Operation
IN
A
V+
V-
*CONNECT SHDN TO V- FOR LOW-POWER SHUTDOWN MODE.
= +25°C.
CLOCK
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
2nd
INPUT
TYPICAL HARMONIC DISTORTION (dB)
IN
CLK
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
3rd
MAX7408
MAX7411
MAX7412
MAX7415
V
GND
V+
DD
V-
Harmonic Distortion
SHDN
COM
OUT
OS
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
4th
*
0.1µF
OUTPUT
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
5th
0.1µF