Overview
The THS4631DDA is a high-speed, FET-input operational amplifier designed by Texas Instruments. It is optimized for applications requiring wideband operation, high-input impedance, and high-power supply voltages. The amplifier features a 210-MHz gain bandwidth product, ±15-V supply operation, and a low input bias current of 100 pA, making it suitable for simultaneous wideband transimpedance gain and large output signal swing. Its fast slew rate of up to 1000 V/µs enables fast settling times and good harmonic distortion at high frequencies. The THS4631DDA is particularly well-suited for use as a wideband photodiode amplifier and in various other high-speed applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bandwidth (Unity Gain) | 325 | MHz |
| Gain Bandwidth Product | 210 | MHz |
| Slew Rate (G = 2) | 900 | V/µs |
| Slew Rate (G = 5) | 1000 | V/µs |
| Input Bias Current | 100 | pA |
| Input Voltage Noise | 7 | nV/√Hz |
| Input Offset Voltage | 500 | µV at 25°C |
| Offset Drift | 2.5 | µV/°C |
| Input Impedance | 10^9 || 3.9 pF | |
| Supply Voltage Range | ±5 V to ±15 V | |
| Output Current | 95 | mA |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | 8-pin SOIC (DDA) |
Key Features
- High bandwidth: 325 MHz in unity gain and 210 MHz gain bandwidth product.
- High slew rate: Up to 1000 V/µs.
- Low distortion: –76 dB, SFDR at 5 MHz.
- Low input bias current: 100 pA.
- Low input voltage noise: 7 nV/√Hz.
- Low offset voltage and drift: 500 µV at 25°C and 2.5 µV/°C respectively.
- High input impedance: 10^9 || 3.9 pF.
- Wide supply voltage range: ±5 V to ±15 V.
- High output current: 95 mA.
Applications
- Wideband photodiode amplifier.
- Test and measurement systems requiring high-input impedance.
- ADC and DAC buffering.
- High-speed integration.
- Active filtering.
Q & A
- What is the bandwidth of the THS4631DDA in unity gain configuration? The bandwidth of the THS4631DDA in unity gain configuration is 325 MHz.
- What is the gain bandwidth product of the THS4631DDA? The gain bandwidth product is 210 MHz.
- What is the slew rate of the THS4631DDA? The slew rate is up to 1000 V/µs for a gain of 5.
- What is the input bias current of the THS4631DDA? The input bias current is 100 pA.
- What is the input voltage noise of the THS4631DDA? The input voltage noise is 7 nV/√Hz.
- What is the maximum input offset voltage of the THS4631DDA? The maximum input offset voltage is 500 µV at 25°C.
- What is the operating temperature range of the THS4631DDA? The operating temperature range is -40 to 85°C.
- What package types are available for the THS4631DDA? The THS4631DDA is available in an 8-pin SOIC (DDA) package.
- What are some common applications of the THS4631DDA? Common applications include wideband photodiode amplifiers, test and measurement systems, ADC and DAC buffering, high-speed integration, and active filtering.
- Is the THS4631DDA RoHS compliant? Yes, the THS4631DDA is RoHS compliant.
