LMH6502
- VS = ±5V, TA = 25°C, RF = 1kΩ, RG = 174Ω, RL = 100Ω, AV = AV(MAX) = 10 Typical Values Unless Specified.
- -3dB BW: 130MHz
- Gain Control BW: 100MHz
- Adjustment Range (Typical Over Temp): 70dB
- Gain Matching (Limit): ±0.6dB
- Slew Rate: 1800V/µs
- Supply Current (No Load): 27mA
- Linear Output Current: ±75mA
- Output Voltage (RL = 100Ω): ±3.2V
- Input Voltage Noise: 7.7nV/√Hz
- Input Current Noise: 2.4pA/√Hz
- THD (20MHz, RL = 100Ω, VO = 2VPP): −53dBc
- Replacement for CLC520
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The LMH6502 is a wideband DC coupled differential input voltage controlled gain stage followed by a high-speed current feedback Op Amp which can directly drive a low impedance load. Gain adjustment range is more than 70dB for up to 10MHz.
Maximum gain is set by external components and the gain can be reduced all the way to cut-off. Power consumption is 300mW with a speed of 130MHz. Output referred DC offset voltage is less than 350mV over the entire gain control voltage range. Device-to-device Gain matching is within ±0.6dB at maximum gain. Furthermore, gain at any VG is tested and the tolerance is ensured. The output current feedback Op Amp allows high frequency large signals (Slew Rate = 1800V/μs) and can also drive heavy load current (75mA). Differential inputs allow common mode rejection in low level amplification or in applications where signals are carried over relatively long wires. For single ended operation, the unused input can easily be tied to ground (or to a virtual half-supply in single supply application). Inverting or non-inverting gains could be obtained by choosing one input polarity or the other.
To provide ease of use when working with a single supply, VG range is set to be from 0V to +2V relative to pin 11 potential (ground pin). In single supply operation, this ground pin is tied to a "virtual" half supply.
LMH6502 gain control is linear in dB for a large portion of the total gain control range. This makes the device suitable for AGC circuits among other applications. For linear gain control applications, see the LMH6503 datasheet. The LMH6502 is available in the SOIC and TSSOP package.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LMH6502 Wideband, Low Power, Linear-in-dB Variable Gain Amplifier datasheet (Rev. D) | 2013/3/18 | |||
| EVM User's guide | AN-1808 LMH730033 Evaluation Board (Rev. B) | 2013/5/1 |
設計與開發
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LMH730033 — 適用於採用 14 針腳 SOIC 封裝之高速單一可變增益放大器的評估板
Texas Instruments offers this unpopulated Evaluation Board to aid in the evaluation and testing of high-speed Variable Gain Amplifier that are offered in the 14-Pin SOIC package. Resistors, capacitors, or any other surface-mount components can be easily mounted on this board in the desired circuit (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOIC (D) | 14 | Ultra Librarian |
| TSSOP (PW) | 14 | Ultra Librarian |