ALM2403-Q1
ZHCSMT3A –NOVEMBER 2020 –REVISED MARCH 2023
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8.2.3 Application Curves
The roll of characteristics and output waveform for the designed MFB filter are shown in 图 8-4 and 图 8-5. The
attenuation is specified in 表8-2.
25
0
300
250
200
150
100
50
12
11
10
9
-25
8
7
-50
6
-75
5
4
-100
-125
-150
3
2
0
Gain
Phase
1
-50
0
1
10
100
1000 10000 100000
Frequency (Hz)
1M
10M
0
100
200
Time (ms)
300
400
500
D051
图8-4. 2nd-Order MFB LP Filter AC Output
图8-5. 2nd-Order MFB LP Filter DC Output
Characteristics
表8-2. Signal Attenuation vs Frequency
2ND-ORDER MFB LPF FREQUENCY
ATTENUATION
(dB)
(kHz)
DC
9.54
9.70
10.0
15.4
6.54
19
3.54
30
–4.38
–45.9
320
8.3 Power Supply Recommendations
The ALM2403-Q1 is recommended for continuous operation from 5 V to 24 V (±2.5 V to ±12 V) for VS, and many
specifications apply from –40°C to +125°C.
Place 0.1-μF bypass capacitors close to the power-supply pins to reduce errors coupling from noisy or high-
impedance power supplies.
CAUTION
Supply voltages larger than 26 V can permanently damage the device (see 节6.1).
8.4 Layout
8.4.1 Layout Guidelines
For best operational performance of the device, use good PCB layout practices, including:
• Noise can propagate into analog circuitry through the power pins of the circuit as a whole, as well as the
operational amplifier. Bypass capacitors are used to reduce the coupled noise by providing low impedance
power sources local to the analog circuitry.
– Connect low-ESR, 0.1-μF ceramic bypass capacitors between each supply pin and ground, placed as
close as possible to the device. A single bypass capacitor from V+ to ground is applicable for single-
supply applications.
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Product Folder Links: ALM2403-Q1
English Data Sheet: SBOSA37
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