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參數(shù)資料
| 型號(hào)： | OP183GS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 5 MHz Single-Supply Operational Amplifiers |
| 中文描述： | OP-AMP, 1250 uV OFFSET-MAX, 5 MHz BAND WIDTH, PDSO8 |
| 封裝： | MS-012-AA, SOIC-8 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大小： | 415K |
| 代理商： | OP183GS |
REV. B
OP183/OP283
Low Noise Microphone Amplifier for Multimedia
T he OP183 family is ideally suited as a low noise microphone
preamp for low voltage audio applications. Figure 40 shows a gain
of 100 stereo preamp for the AD1849 16-bit SoundPort Stereo
Codec chip. T he common-mode output buffer serves as a “phan-
tom power” driver for the microphones.
bandwidth and is not sensitive to false-ground perturbations. T he
simple false-ground circuit shown achieves good rejection of low
frequency interference using standard off-the-shelf components.
Amplifier A3 biases A1 and A2 to the middle of their input
common-mode range. When operating on a +3 V supply, the
center of the OP283’s common-mode range is 0.75 V. T his notch
filter effectively squelches 60 Hz pickup at a filter Q of 0.75. T o
reject 50 Hz interference, simply change the resistors in the twin-T
section (R1 through R5) from 2.67 k
to 3.16 k
.
T he filter section uses an OP283 dual op amp in a twin-T configu-
ration whose frequency selectivity is very sensitive to the relative
matching of the capacitors and resistors in the twin-T section.
Mylar is the material of choice for the capacitors, and the relative
matching of the capacitors and resistors determines the filter’s pass
band symmetry. Using 1% resistors and 5% capacitors produces
satisfactory results.
A Low Voltage Frequency Synthesizer for Wireless
T ransceiver
T he OP183’s low noise and the low voltage operation capability
serves well for the loop filter of a frequency synthesizer. Figure 42
shows a typical application in a radio transceiver. T he phase noise
performance of the synthesizer depends on low noise contribution
from each component in the loop as the noise is amplified by the
frequency division factor of the prescaler.
CRYSTAL
+3V
VARACTER
DIODE
900MHz
REFERENCE
OSCILLATOR
DPHASE
PRESCALER
RF
OUT
V
CONTROL
VCO
OP183
Figure 42. A Low Voltage Frequency Synthesizer for a
Wireless Transceiver
T he resistors used in the low-pass filter should be of low to
moderate values to reduce noise contribution due to the input bias
current as well as the resistors themselves. T he filter cutoff
frequency should be chosen to optimize the loop constant.
10k
50
20
100
20
50
10k
10k
100
10k
+5V
1/2 OP283
10μF
+5V
1/2 OP213
10μF
1/2 OP283
15
17MINL
MINR
19CMOUT
AD1849
LEFT
ELECTRET
CONDENSER
MIC
INPUT
RIGHT
ELECTRET
CONDENSER
MIC
INPUT
Figure 40. Low Noise Stereo Microphone Amplifier for
Multimedia Sound CODEC
A +3 Volt 50 Hz/60 Hz Active Notch Filter with False Ground
T o process ac signals, it may be easier to use a false-ground bias
rather than the negative supply as a reference ground. T his would
reject the power-line frequency interference which oftentimes can
obscure low frequency physiological signals, such as heart rates,
blood pressures, EEGs, ECGs, et cetera.
R10
25k
R8
1k
8
1
4
3
2
A1
+3V
C1
1μF
R1
2.67k
R3
2.67k
C2
1μF
R4
2.67k
1/2 OP283
R6
10k
V
IN
R5
1.33k
(2.67k
÷ 2)
C3
2μF
(1μF
×
2)
7
6
5
A2
V
O
1/2 OP283
R7
1k
1
3
2
A3
OP183
C5
0.015μF
R11
10k
R12
70
0.75V
C6
1μF
+3V
C4
1μF
A1, A2, AND A3 = 1/2 OP283
Q = 0.75
NOTE: FOR 50Hz APPLICATIONS
CHANGE R1–R4 TO 3.1k
AND R5 TO 1.58k
(3.16k
÷ 2).
R2
2.67k
R9
75k
Figure 41. +3 Volt Supply 50 Hz/60 Hz Notch Filter with
Pseudo Ground
Figure 41 shows a 50 Hz/60 Hz active notch filter for eliminating
line noise in patient monitoring equipment. It has several kilohertz
–10–
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OP283GS | 5 MHz Single-Supply Operational Amplifiers |
| OP283 | 5 MHz Single-Supply Operational Amplifiers(5MHz單電源運(yùn)算放大器) |
| OP284 | Precision Rail-to-Rail Input & Output Operational Amplifiers |
| OP284EP | Precision Rail-to-Rail Input & Output Operational Amplifiers |
| OP284ES | Precision Rail-to-Rail Input & Output Operational Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP183GS-REEL | 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V/36V 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:SINGLE SUPPLY 5MHZ OP AMP - Tape and Reel |
| OP183GS-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V/36V 8-Pin SOIC N T/R |
| OP183GSZ | 功能描述:IC OPAMP GP 5MHZ LN 50MA 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類(lèi)型:通用 電路數(shù):1 輸出類(lèi)型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
| OP183GSZ-REEL | 功能描述:IC OPAMP GP 5MHZ LN 50MA 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類(lèi)型:通用 電路數(shù):1 輸出類(lèi)型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
| OP183GSZ-REEL7 | 制造商:Analog Devices 功能描述:OP Amp Single GP ±18V/36V 8-Pin SOIC N T/R |
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