MAX7490CEE Maxim Integrated Products, MAX7490CEE Datasheet - Page 16
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MAX7490CEE
Manufacturer Part Number
MAX7490CEE
Description
Active Filter
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX7490EEE.pdf
(18 pages)
Specifications of MAX7490CEE
Number Of Channels
2
Cutoff Frequency
40 KHz
Supply Voltage (max)
5.5 V
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Operating Supply Voltage
5 V
Supply Voltage (min)
4.5 V
Package / Case
QSOP-16
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX7490CEE
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
MAX7490CEE+
Manufacturer:
Maxim
Quantity:
180
Dual Universal Switched-Capacitor Filters
Table 5. Cascading Identical Bandpass
Filter Sections
The wideband noise of the filter is the total RMS value
of the device’s noise spectral density and is used to
determine the operating SNR. Most of its frequency
contents lie within the filter’s passband and cannot be
reduced with postfiltering. The total noise depends
mainly on the Q of each filter section and the cascade
sequence. Therefore, in multistage filters, place the
section with the highest Q first for lower output noise.
16
TOTAL SECTIONS
______________________________________________________________________________________
1
2
3
4
5
TOTAL BW
1.000 B
0.644 B
0.510 B
0.435 B
0.386 B
Wideband Noise
TOTAL Q
1.00 Q
1.55 Q
1.96 Q
2.30 Q
2.60 Q
In some designs, such as very narrow band filters, or in
modes where f
2nd-order sections with identical f
without multiple feedback. The total Q of the resultant
filter (Q
Q is the Q of each individual filter section, and N is the
number of 2nd-order sections. In Table 5, the total Q and
total bandwidth (BW) are listed for up to five identical
2nd-order sections. B is the bandwidth of each section.
PROCESS: BiCMOS
T
) is:
Total Q
O
cannot be tuned with resistors, several
T
=
Q
/
Multiple Filter Stages
(
Chip Information
2
1
/
N
O
−
may be cascaded
1
)
1 2
/