OPA4684 四路低功耗电流反馈运算放大器
The OPA4684 provides a new level of performance in low-power, wideband, current-feedback (CFB) amplifiers. This CFBPLUS amplifier is among the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. This new architecture provides many of the benefits of a more ideal CFB amplifier while retaining the benefits of very low power operation. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity.
|
OPA4684 |
| Iq per channel(Max)(mA) |
7.8 |
| Slew Rate(Typ)(V/us) |
750 |
| GBW(Typ)(MHz) |
1900 |
| Io(Typ)(mA) |
120 |
| Vs(Min)(V) |
5 |
| Vs(Max)(V) |
12 |
| Number of Channels |
4 |
| Pin/Package |
14SOIC, 14TSSOP |
| Acl, min stable gain(V/V) |
1 |
| BW @ Acl(MHz) |
250 |
| Diff Gain(%) |
0.04 |
| Diff Phase(deg) |
0.02 |
| Vio(Max)(mV) |
4 |
| THD (Fc=1 MHz)(Typ)(dB) |
-79 |
| Settling Time (0.1%)(Typ)(ns) |
|
| Offset Voltage Drift (+/-)(Max)(uV/Degrees Celsius) |
12 |
| Available Channels |
S, D, T, Q |
| Vn at Flatband(Typ)(nV/rtHz) |
3.7 |
| Approx. Price (US$) |
3.30 | 1ku |
| Iib(Max)(nA) |
15000 |
| Noninverting Input Current Noise(pA/rtHz) |
9.4 |
| 2nd Harmonic(dBc) |
80 |
| 3rd Harmonic(dBc) |
80 |
| @ MHz |
5 |
| BW @ G=+2(MHz) |
170 |
| 0.1 dB BW Flatness(MHz) |
19 |
| Inverting Input Current Noise(pA/rtHz) |
17 |
| Crosstalk(-dB) |
52 |
| Operating Temperature Range(C) |
-40 to 85 |
OPA4684 特性
- MINIMAL BANDWIDTH CHANGE VERSUS GAIN
- 170MHz BANDWIDTH AT G = +2
- >120MHz BANDWIDTH TO GAIN > +10
- LOW DISTORTION: < –78dBc at 5MHz
- HIGH OUTPUT CURRENT: 120mA
- SINGLE +5V TO +12V SUPPLY OPERATION
- DUAL ±2.5 TO ±6.0V SUPPLY OPERATION
- LOW SUPPLY CURRENT: 6.8mA Total
- APPLICATIONS
- LOW-POWER BROADCAST VIDEO DRIVERS
- EQUALIZING FILTERS
- SAW FILTER HIGH-GAIN POST AMPLIFIERS
- MULTICHANNEL SUMMING AMPLIFIERS
- WIDEBAND DIFFERENTIAL CHANNELS
- ANALOG-TO-DIGITAL CONVERTERS INPUT DRIVERS
- MULTIPLE POLE ACTIVE FILTERS
- OPA4658 LOW-POWER UPGRADE
OPA4684 芯片订购指南
| 器件 |
状态 |
温度 |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| OPA4684ID |
ACTIVE |
-40 to 85 |
3.95 | 1ku |
SOIC (D) | 14 |
50 | TUBE |
|
| OPA4684IDG4 |
ACTIVE |
-40 to 85 |
3.95 | 1ku |
SOIC (D) | 14 |
50 | TUBE |
|
| OPA4684IDR |
ACTIVE |
-40 to 85 |
3.30 | 1ku |
SOIC (D) | 14 |
2500 | LARGE T&R |
|
| OPA4684IDRG4 |
ACTIVE |
-40 to 85 |
3.30 | 1ku |
SOIC (D) | 14 |
2500 | LARGE T&R |
|
| OPA4684IPWTT |
ACTIVE |
-40 to 85 |
3.80 | 1ku |
TSSOP (PW) | 14 |
250 | SMALL T&R |
|
| OPA4684IPWTTG4 |
ACTIVE |
-40 to 85 |
3.80 | 1ku |
TSSOP (PW) | 14 |
250 | SMALL T&R |
|
OPA4684 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| OPA4684ID |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
OPA4684ID |
OPA4684ID |
| OPA4684IDG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
OPA4684IDG4 |
OPA4684IDG4 |
| OPA4684IDR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
OPA4684IDR |
OPA4684IDR |
| OPA4684IDRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
OPA4684IDRG4 |
OPA4684IDRG4 |
| OPA4684IPWT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
OPA4684IPWT |
OPA4684IPWT |
| OPA4684IPWTG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
OPA4684IPWTG4 |
OPA4684IPWTG4 |
OPA4684 应用技术支持与电子电路设计开发资源下载
- OPA4684 数据资料 dataSheet 下载.PDF
- TI 德州仪器仪运算放大器 (Op Amp)产品选型与价格 . xls
- 所选封装材料的热学和电学性质 (PDF 645 KB)
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- Op Amp Performance Analysis (PDF 76 KB)
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- Level Shifting Signals with Differential Amplifiers (PDF 23 KB)
- Operational Amplifier Macromodels: A Comparison (PDF 59 KB)
OPA4684 工具与软件
