MAX7490CEE+T Maxim Integrated Products, MAX7490CEE+T Datasheet - Page 16

• Manufacturer Part Number: MAX7490CEE+T
• Description: IC FILTER SW CAP DUAL 16-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX7490CEE+T

• Filter Type: Universal Switched Capacitor
• Frequency - Cutoff Or Center: 40kHz
• Number Of Filters: 2
• Max-order: 2nd
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
/