- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄5356 > OP27GS-REEL7 (Analog Devices Inc)IC OPAMP GP 8MHZ LN PREC 8SOIC PDF資料下載
參數(shù)資料
| 型號(hào)： | OP27GS-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP GP 8MHZ LN PREC 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 2.8 V/µs |
| 增益帶寬積： | 8MHz |
| 電流 - 輸入偏壓： | 15nA |
| 電壓 - 輸入偏移： | 30µV |
| 電壓 - 電源，單路/雙路(±)： | ±4 V ~ 18 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 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) |
| 其它名稱： | OP27GS-REEL7-ND OP27GS-REEL7TR |
OP27
Rev. F | Page 16 of 20
For reference, typical source resistances of some signal sources
are listed in Table 7.
Table 7.
Device
Source
Impedance
Comments
Strain Gauge
<500 Ω
Typically used in low frequency
applications.
Magnetic
Tape Head
<1500 Ω
Low is very important to reduce
self-magnetization problems
when direct coupling is used.
OP27 IB can be neglected.
Magnetic
Phonograph
Cartridges
<1500 Ω
Similar need for low IB in direct
coupled applications. OP27 does
not introduce any self-
magnetization problems.
Linear
Variable
Differential
Transformer
<1500 Ω
Used in rugged servo-feedback
applications. Bandwidth of
interest is 400 Hz to 5 kHz.
Table 8. Open-Loop Gain
Frequency
OP27
@ 3 Hz
100 dB
124 dB
125 dB
@ 10 Hz
100 dB
120 dB
125 dB
@ 30 Hz
90 dB
110 dB
124 dB
AUDIO APPLICATIONS
Figure 41 is an example of a phono pre-amplifier circuit using the
OP27 for A1; R1-R2-C1-C2 form a very accurate RIAA network
with standard component values. The popular method to
accomplish RIAA phono equalization is to employ frequency
dependent feedback around a high quality gain block. Properly
chosen, an RC network can provide the three necessary time
constants of 3180 μs, 318 μs, and 75 μs.
For initial equalization accuracy and stability, precision metal
film resistors and film capacitors of polystyrene or polypro-
pylene are recommended because they have low voltage
coefficients, dissipation factors, and dielectric absorption.
(high-k ceramic capacitors should be avoided here, though
low-k ceramics, such as NPO types that have excellent
dissipation factors and somewhat lower dielectric absorption,
can be considered for small values.)
CA
150pF
A1
OP27
RA
47.5k
MOVING MAGNET
CARTRIDGE INPUT
++
C4 (2)
220F
C1
0.03F
C2
0.01F
C3
0.47F
LF ROLLOFF
OUT
IN
OUTPUT
R5
100k
R4
75k
R1
97.6k
R2
7.87k
R3
100
G = 1kHz GAIN
= 0.101 ( 1 +
)
R1
R3
= 98.677 (39.9dB) AS SHOWN
2
6
3
003
17
-041
Figure 41. Phono Preamplifier Circuit
The OP27 brings a 3.2 nV/√Hz voltage noise and 0.45 pA/√Hz
current noise to this circuit. To minimize noise from other
sources, R3 is set to a value of 100 Ω, generating a voltage noise
of 1.3 nV/√Hz. The noise increases the 3.2 nV/√Hz of the
amplifier by only 0.7 dB. With a 1 kΩ source, the circuit noise
measures 63 dB below a 1 mV reference level, unweighted, in a
20 kHz noise bandwidth.
Gain (G) of the circuit at 1 kHz can be calculated by the
expression:
+
=
R3
R1
G
1
101
.
0
For the values shown, the gain is just under 100 (or 40 dB).
Lower gains can be accommodated by increasing R3, but gains
higher than 40 dB show more equalization errors because of the
8 MHz gain bandwidth of the OP27.
This circuit is capable of very low distortion over its entire
range, generally below 0.01% at levels up to 7 V rms. At 3 V
output levels, it produces less than 0.03% total harmonic
distortion at frequencies up to 20 kHz.
Capacitor C3 and Resistor R4 form a simple 6 dB per octave
rumble filter, with a corner at 22 Hz. As an option, the switch
selected Shunt Capacitor C4, a nonpolarized electrolytic,
bypasses the low frequency roll-off. Placing the rumble filter’s
high-pass action after the preamplifier has the desirable result
of discriminating against the RIAA-amplified low frequency
noise components and pickup produced low frequency
disturbances.
A preamplifier for NAB tape playback is similar to an RIAA
phono preamplifier, though more gain is typically demanded,
along with equalization requiring a heavy low frequency boost.
The circuit in Figure 41 can be readily modified for tape use, as
shown by Figure 42.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 1PMT26AT1G | TVS 200W 26V POWERMITE |
| MMB21-0341JU | CONN RACK/PANEL 34POS 5A |
| AD8656WARMZ-REEL | IC OPAMP GP R-R CMOS 28MHZ 8MSOP |
| MMB25-0201K1 | CONN RACK/PANEL 20POS 5A |
| 1PMT22AT1G | TVS 200W 22V POWERMITE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP27GS-T | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| OP27GSZ | 功能描述:IC OPAMP GP 8MHZ LN PREC 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:RF/IF 差分 電路數(shù):1 輸出類型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| OP27GSZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise, Precision Operational Amplifier |
| OP27GSZ-REEL | 功能描述:IC OPAMP GP 8MHZ LN PREC 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型: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) |
| OP27GSZ-REEL1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Noise, Precision Operational Amplifier |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。