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參數(shù)資料
| 型號(hào)： | OP275GP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Dual Bipolar/JFET, Audio Operational Amplifier |
| 中文描述： | AUDIO AMPLIFIER, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 189K |
| 代理商： | OP275GP |
OP275
REV. A
–10–
importance. Like the transformer based design, either output
can be shorted to ground for unbalanced line driver applications
without changing the circuit gain of 1. Other circuit gains can be
set according to the equation in the diagram. This allows the
design to be easily set to noninverting, inverting, or differential
operation.
A 3-Pole, 40 kHz Low-Pass Filter
The closely matched and uniform ac characteristics of the
OP275 make it ideal for use in GIC (Generalized Impedance
Converter) and FDNR (Frequency-Dependent Negative Resis-
tor) filter applications. The circuit in Figure 18 illustrates a lin-
ear-phase, 3-pole, 40 kHz low-pass filter using an OP275 as an
inductance simulator (gyrator). The circuit uses one OP275 (A2
and A3) for the FDNR and one OP275 (A1 and A4) as an input
buffer and bias current source for A3. Amplifier A4 is config-
ured in a gain of 2 to set the pass band magnitude response to
0 dB. The benefits of this filter topology over classical ap-
proaches are that the op amp used in the FDNR is not in the
signal path and that the filter’s performance is relatively insensi-
tive to component variations. Also, the configuration is such that
large signal levels can be handled without overloading any of the
the filter’s internal nodes. As shown in Figure 19, the OP275’s
symmetric slew rate and low distortion produce a clean, well-
behaved transient response.
R1
95.3k
V
IN
3
2
1
A1
R2
787
C1
2200pF
C2
2200pF
R3
1.82k
C3
2200pF
R4
1.87k
R5
1.82k
A2
1
2
3
5
6
7
A3
R6
4.12k
C4
2200pF
R7
100k
5
6
7
A4
R8
1k
R9
1k
V
OUT
A1, A4 = 1/2 OP275
A2, A3 = 1/2 OP275
Figure 18. A 3-Pole, 40 kHz Low-Pass Filter
V
OUT
10Vp-p
10kHz
SCALE: VERTICAL–2V/ DIV
HORIZONTAL–10μs/ DIV
10
0%
100
90
Figure 19. Low-Pass Filter Transient Response
of the circuit and dc offset errors. If the parallel combination of
R
F
and R
G
is larger than 2k
, then an additional resistor, R
S
,
should be used in series with the noninverting input. The value
of R
S
is determined by the parallel combination of R
F
and R
G
to
maintain the low distortion performance of the OP275.
Driving Capacitive Loads
The OP275 was designed to drive both resistive loads to 600
and capacitive loads of over 1000 pF and maintain stability.
While there is a degradation in bandwidth when driving capaci-
tive loads, the designer need not worry about device stability.
The graph in Figure 16 shows the 0 dB bandwidth of the OP275
with capacitive loads from 10 pF to 1000 pF.
10
9
8
7
6
5
4
3
2
1
0
0
200
400
600
800
1000
C
LOAD
– pF
B
Figure 16. Bandwidth vs. C
LOAD
High Speed, Low Noise Differential Line Driver
The circuit of Figure 17 is a unique line driver widely used in
industrial applications. With
±
18 V supplies, the line driver can
deliver a differential signal of 30 V p-p into a 2.5 k
load. The
high slew rate and wide bandwidth of the OP275 combine to
yield a full power bandwidth of 130 kHz while the low noise
front end produces a referred-to-input noise voltage spectral
density of 10 nV/
√
Hz
.
1
2
3
A2
1
3
2
A1
5
6
7
A3
V
IN
V
O1
V
O2
R3
2k
R9
50
R11
1k
P1
10k
R12
1k
R10
50
R8
2k
R2
2k
R5
2k
R4
2k
R1
2k
R7
2k
V
O2
– V
O1
= V
IN
A1 = 1/2 OP275
A2, A3 = 1/2 OP275
GAIN =
SET R2, R4, R5 = R1 AND R6, R7, R8 = R3
R3
R1
R6
2k
Figure 17. High Speed, Low Noise Differential Line Driver
The design is a transformerless, balanced transmission system
where output common-mode rejection of noise is of paramount
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| OP275GPZ | 功能描述:IC AMP AUDIO STER CLASS AB 8DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1 系列:MicroAmplifier™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:5pA 電壓 - 輸入偏移:1500µV 電流 - 電源:220µA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 36 V，±2.25 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:剪切帶 (CT) 其它名稱:296-29363-1 |
| OP275GS | 功能描述:IC AMP AUDIO STER CLASS AB 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 放大器類型:電壓反饋 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:33 V/µs 增益帶寬積:20MHz -3db帶寬:30MHz 電流 - 輸入偏壓:2nA 電壓 - 輸入偏移:3000µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:30mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SOIC 包裝:帶卷 (TR) |
| OP275GSR | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Bipolar/JFET, Audio Operational Amplifier |
| OP275GS-REEL | 功能描述:IC AMP AUDIO STER CLASS AB 8SOIC RoHS:否 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) |
| OP275GS-REEL7 | 功能描述:IC AMP AUDIO STER CLASS AB 8SOIC RoHS:否 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) |
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