Overview
The Texas Instruments THS4551IRGTR is a precision, low noise, 150MHz fully differential amplifier designed for exceptional DC accuracy, low noise, and robust capacitive load driving. This device is particularly well-suited for data acquisition systems where high precision is required, along with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and analog-to-digital converter (ADC) combination. The THS4551IRGTR offers an easy interface from single-ended sources to the differential output required by high-precision ADCs, making it ideal for applications involving high-speed and high-precision signal processing.
Key Specifications
| Parameter | Value |
|---|---|
| Bandwidth | 150 MHz (G = 1 V/V) |
| Differential Output Slew Rate | 220 V/µs |
| Gain Bandwidth Product | 135 MHz |
| Input Offset Voltage | ±175 µV (max) at 25°C |
| Input Offset Voltage Drift | ±1.8 µV/°C (max) |
| Differential Input Voltage Noise | 3.3 nV/√ Hz |
| Settling Time (4-V Step to 0.01%) | < 50 ns |
| 18-Bit Settling Time (4-V Step) | < 500 ns |
| Supply Current | 1.37 mA at 5 V |
| Operating Temperature Range | -40°C to +125°C |
| Package Options | 8-pin VSSOP, 16-pin VQFN, 10-pin WQFN |
Key Features
- Negative Rail Input (NRI) and Rail-to-Rail Output (RRO)
- Wide output common-mode control range
- Single-supply operating range: 2.7 V to 5.4 V
- Low DC error and drift terms supporting 16- to 20-bit SAR ADCs
- High second and third harmonic distortion performance: HD2 –128 dBc, HD3 –139 dBc at 2 V PP, 100 kHz
- Robust capacitive load driving capability
Applications
- 24-bit, Delta-Sigma (ΔΣ) ADC drivers
- 16 to 20-bit, differential, high-speed SAR drivers
- Differential active filters
- Differential transimpedance amplifiers
- Pin-compatible upgrade to the THS4521 (VSSOP-8 only)
Q & A
- What is the bandwidth of the THS4551IRGTR?
The bandwidth of the THS4551IRGTR is 150 MHz (G = 1 V/V).
- What is the differential output slew rate of the THS4551IRGTR?
The differential output slew rate is 220 V/µs.
- What is the input offset voltage of the THS4551IRGTR?
The input offset voltage is ±175 µV (max) at 25°C.
- What is the operating temperature range of the THS4551IRGTR?
The operating temperature range is -40°C to +125°C.
- What are the package options for the THS4551IRGTR?
The device is available in 8-pin VSSOP, 16-pin VQFN, and 10-pin WQFN packages.
- What is the typical supply current of the THS4551IRGTR?
The typical supply current is 1.37 mA at 5 V.
- What are the key applications of the THS4551IRGTR?
The key applications include 24-bit ΔΣ ADC drivers, 16 to 20-bit differential high-speed SAR drivers, differential active filters, and differential transimpedance amplifiers.
- Does the THS4551IRGTR support negative rail input?
Yes, the THS4551IRGTR features a negative rail input (NRI) which is required when interfacing a dc-coupled, ground-centered source signal to a single-supply differential input ADC.
- What is the settling time of the THS4551IRGTR for a 4-V step to 0.01%?
The settling time is less than 50 ns for a 4-V step to 0.01%.
- Is the THS4551IRGTR suitable for high-precision data acquisition systems?
Yes, the THS4551IRGTR is designed for exceptional DC accuracy, low noise, and robust capacitive load driving, making it well-suited for high-precision data acquisition systems.
