参数资料
型号: LT1800IS5
厂商: LINEAR TECHNOLOGY CORP
元件分类: 运动控制电子
英文描述: 80MHz, 25V/ms Low Power Rail-to-Rail Input and Output Precision Op Amp
中文描述: OP-AMP, 5500 uV OFFSET-MAX, 65 MHz BAND WIDTH, PDSO5
封装: 1MM HEIGHT, PLASTIC, TSOT-23, 5 PIN
文件页数: 14/16页
文件大小: 266K
代理商: LT1800IS5
14
LT1800
1800f
TYPICAL APPLICATIO S
+
LT1800
909
V
IN
V
S
/2
V
OUT
1800 F04
220pF
909
2.67k
+
LT1800
1.1k
22pF
3V
470pF
2.21k
1.1k
47pF
Figure 4. 3V, 1MHz, 4th Order Butterworth Filter
Figure 5. Frequency Response of Filter
FREQUENCY (Hz)
–80
G
–40
0
–100
–60
–20
1k
100k
1M
10M
100M
1800 F05
–120
10k
Figure 3. Current Sense Amplifier Large-Signal Response
500mV/DIV
0V
V
S
= 3V
50ns/DIV
1800 F03
Single 3V Supply, 1MHz, 4th Order Butterworth Filter
The circuit shown in Figure 4 makes use of the low voltage
operation and the wide bandwidth of the LT1800 to create
a DC accurate 1MHz 4th order lowpass filter powered from
a 3V supply. The amplifiers are configured in the inverting
mode for the lowest distortion and the output can swing
rail-to-rail for maximum dynamic range. Figure 5 displays
the frequency response of the filter. Stopband attenuation
is greater than 100dB at 50MHz. With a 2.25V
P-P
, 250kHz
input signal, the filter has harmonic distortion products of
less than –85dBc. Worst case output offset voltage is less
than 6mV.
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