Overview
The THS4631DGNRG4 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. This 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. The fast slew rate of up to 1000 V/µs enables fast settling times and good harmonic distortion at high frequencies. The THS4631 is particularly well-suited for use as a wideband photodiode amplifier and other applications such as test and measurement systems, ADC and DAC buffering, high-speed integration, and active filtering.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Bandwidth (Unity Gain) | 325 | MHz |
| Gain Bandwidth Product | 210 | MHz |
| Slew Rate (G = 2) | 900 | V/µs |
| Slew Rate (G = 5) | 1000 | V/µs |
| Distortion (SFDR at 5 MHz) | -76 | dB |
| Input Bias Current | 100 | pA |
| Input Voltage Noise | 7 | nV/√Hz |
| Input Offset Voltage (at 25°C) | 500 | µV |
| Offset Drift | 2.5 | µV/°C |
| Input Impedance | 10^9 || 3.9 pF | |
| Supply Range | ±5 V to ±15 V | |
| Output Current | 95 | mA |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | MSOP (DGN) with PowerPAD™ | |
| Pins | 8 |
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
- High input impedance: 10^9 || 3.9 pF
- Wide supply 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
- High-speed signal integrator
- High-impedance buffer
- Current-DAC output buffer
Q & A
- What is the bandwidth of the THS4631 in unity gain?
The bandwidth of the THS4631 in unity gain is 325 MHz.
- What is the gain bandwidth product of the THS4631?
The gain bandwidth product of the THS4631 is 210 MHz.
- What is the slew rate of the THS4631 at a gain of 5?
The slew rate of the THS4631 at a gain of 5 is up to 1000 V/µs.
- What is the input bias current of the THS4631?
The input bias current of the THS4631 is 100 pA.
- What is the input voltage noise of the THS4631?
The input voltage noise of the THS4631 is 7 nV/√Hz.
- What is the input offset voltage of the THS4631 at 25°C?
The input offset voltage of the THS4631 at 25°C is 500 µV.
- What is the input impedance of the THS4631?
The input impedance of the THS4631 is 10^9 || 3.9 pF.
- What is the supply voltage range of the THS4631?
The supply voltage range of the THS4631 is ±5 V to ±15 V.
- What is the maximum output current of the THS4631?
The maximum output current of the THS4631 is 95 mA.
- In what package types is the THS4631 available?
The THS4631 is available in 8-pin SOIC (D), 8-pin SOIC (DDA), and MSOP (DGN) with PowerPAD™ packages.
