参数资料
| 型号： | OP285GS |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/16页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 9MHZ DUAL PREC 8SOIC |
| 标准包装： | 98 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 转换速率： | 22 V/µs |
| 增益带宽积： | 9MHz |
| 电流 - 输入偏压： | 100nA |
| 电压 - 输入偏移： | 35µV |
| 电流 - 电源： | 4mA |
| 电压 - 电源，单路/双路(±)： | 9 V ~ 44 V，±4.5 V ~ 22 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 管件 |
REV. A
OP285
–9–
+15V
+
2
3
8
1
4
VIN
VOUT
–15V
10pF
+
10 F
0.1 F
4.99k
2k
0.1 F
10 F
2.49k
4.99k
+
–
1/2
OP285
Figure 9. Unity-Gain Inverter
In inverting and noninverting applications, the feedback resis-
tance forms a pole with the source resistance and capacitance
(RS and CS) and the OP285’s input capacitance (CIN), as
shown in Figure 10. With RS and RF in the kilohm range, this
pole can create excess phase shift and even oscillation. A small
capacitor, CFB, in parallel with RFB eliminates this problem. By
setting RS (CS + CIN) = RFBCFB, the effect of the feedback pole
is completely removed.
CFB
RFB
CIN
VOUT
RS
CS
Figure 10. Compensating the Feedback Pole
High-Speed, Low-Noise Differential Line Driver
The circuit of Figure 11 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 OP285 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. The design is a transformerless, balanced
transmission system where output common-mode rejection of
noise is of paramount 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.
2
3
A2
1
3
2
A1
5
6
7
A3
VIN
VO1
VO2
VO2 – VO1 = VIN
R2
2k
A1 = 1/2OP285
A2, A3 = 1/2 OP285
GAIN = SET R2, R4, R5 = R1 AND R, R7, R8 = R2
1
R1
2k
R3
2k
R9
50
R11
1k
P1
10k
R12
1k
R4
2k
R5
2k
R6
2k
R10
50
R8
2k
R7
2k
Figure 11. High-Speed, Low-Noise Differential Line Driver
Low Phase Error Amplifier
The simple amplifier configuration of Figure 12 uses the OP285
and resistors to reduce phase error substantially over a wide
frequency range when compared to conventional amplifier designs.
This technique relies on the matched frequency characteristics
of the two amplifiers in the OP285. Each amplifier in the circuit
has the same feedback network which produces a circuit gain of
10. Since the two amplifiers are set to the same gain and are
matched due to the monolithic construction of the OP285, they
will exhibit identical frequency response. Recall from feedback
theory that a pole of a feedback network becomes a zero in the
loop gain response. By using this technique, the dominant pole
of the amplifier in the feedback loop compensates for the domi-
nant pole of the main amplifier,
1
2
3
A1
7
A2
5
6
R1
549
R2
4.99k
R3
499
VIN
VOUT
R5
549
R4
4.99
A1, A2 = 1/2 OP285
Figure 12. Cancellation of A2’s Dominant Pole by A1
相关PDF资料 |
PDF描述 |
|---|---|
| 66506-002 | QUICKIE*II HEADER |
| 2036-23-SM | GAS DISCHARGE TUBE MINI 3 POLE |
| AD8011AR | IC OPAMP CF LP LDIST 30MA 8SOIC |
| 0001.1015 | FUSE 12.5A 250V 5X20 FAST CERM |
| LT6235CGN#TRPBF | IC OP AMP QUAD 60MHZ R-R 16-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| OP-285GS | 制造商:AD 制造商全称:Analog Devices 功能描述:DUAL, 9MHz PRECISION OPERATIONAL AMPLIFIER |
| OP285GSR | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual 9 MHz Precision Operational Amplifier |
| OP-285GSR | 制造商:AD 制造商全称:Analog Devices 功能描述:DUAL, 9MHz PRECISION OPERATIONAL AMPLIFIER |
| OP285GS-REEL | 功能描述:IC OPAMP GP 9MHZ DUAL PREC 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:350 V/µs 增益带宽积:180MHz -3db带宽:320MHz 电流 - 输入偏压:12.5µA 电压 - 输入偏移:800µV 电流 - 电源:15mA 电流 - 输出 / 通道:85mA 电压 - 电源，单路/双路(±):2.5 V ~ 12.6 V，±1.25 V ~ 6.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) |
| OP285GS-REEL7 | 功能描述:IC OPAMP GP 9MHZ DUAL PREC 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:350 V/µs 增益带宽积:180MHz -3db带宽:320MHz 电流 - 输入偏压:12.5µA 电压 - 输入偏移:800µV 电流 - 电源:15mA 电流 - 输出 / 通道:85mA 电压 - 电源，单路/双路(±):2.5 V ~ 12.6 V，±1.25 V ~ 6.3 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MSOP 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。