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Data sheet
THS4561
- Bandwidth: 60 MHz (G = 1 V/V)
- Slew Rate: 230 V/µs
- Gain Bandwidth Product: 68 MHz
- Voltage Noise:
- 1/f Voltage Noise Corner: 8 Hz
- Broadband Noise (≥ 500 Hz): 4 nV/√ Hz
- Input Offset: ±250 µV (Maximum)
- Drift: ±4 µV/°C (Maximum)
- Supply Operating Range: 2.85 V to 12.6 V
- Supply Current: 775 µA
- Negative Rail Input (NRI)
- Rail-to-Rail Output (RRO)
- Very Low Harmonic Distortion:
- HD2: –117 dBc at 2 VPP, 100 kHz
- HD3: –124 dBc at 2 VPP, 100 kHz
- 0.01% Settling (2-V Step): 90 ns
The THS4561 fully differential amplifier (FDA) offers a simple interface from single-ended sources to the differential output required by precision analog-to-digital converters (ADCs). Designed for a very low,8-Hz, 1/f voltage noise corner and low, 130-dB total harmonic distortion (THD) while consuming only a775-µA quiescent current, the THS4561 is well suited for power-sensitive data acquisition (DAQ) systems where high performance is required with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and ADC combination.
The THS4561 features the required negative rail input when interfacing a DC-coupled, ground-centered, source signal to a single-supply, differential-input ADC. Low DC error and drift terms support the emerging high-speed and high-resolution successive approximation register (SAR) and delta-sigma (ΔΣ) ADC input requirements. A 2.85-V to 12.6-V supply range with a flexible output common-mode setting with low headroom to the supplies supports a wide range of ADC input and digital-to-analog converter (DAC) output requirements.
The THS4561 device is characterized for operation from –40°C to +125°C.
Technical documentation
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View all 8 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | THS4561 Low-Power, High Supply Range, 60-MHz, Fully Differential Amplifier datasheet (Rev. D) | PDF | HTML | 01 Feb 2021 |
| Product overview | Pairing ADC Drivers With Fully-Differential Input ADCs for Wide Bandwidth Data Acquisition | 01 Apr 2024 | ||
| Product overview | PLC Analog Input Front-End Architectures | PDF | HTML | 31 Jul 2022 | |
| Circuit design | Differential input to differential output circuit using a fully-differential amp | 07 Jan 2019 | ||
| Circuit design | Single-ended input to differential output circuit using a fully-differential amp | 07 Jan 2019 | ||
| Application note | Attenuator Amplifier Design to Maximize the Input Voltage of Differential ADCs | 14 Jun 2018 | ||
| EVM User's guide | THS4561 EVM User's Guide | 10 Aug 2017 | ||
| Application note | Noise Analysis for High Speed Op Amps (Rev. A) | 17 Jan 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
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Evaluation board
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User guide: PDF
Simulation model
Discrete Impedance Spectroscopy TINA-TI Reference Design (Single-Ended)
SBOMBM1.TSC (1083 KB) - TINA-TI Reference Design
Simulation model
Impedance Spectroscopy TINA-TI Reference Design (Differential)
SBOMBM0.TSC (94 KB) - TINA-TI Reference Design
Simulation model
THS4561 TINA-TI Reference Design (Rev. D)
SBOMAE4D.TSC (35 KB) - TINA-TI Reference Design
Design tool
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This design uses a fully-differential amplifier (FDA) as a differential input to differential output amplifier.
Design tool
CIRCUIT060070 — Single-ended input to differential output circuit using a fully-differential amplifier
This design uses a fully-differential amplifier (FDA) as a single-ended input to differential output amplifier.
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
Reference designs
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TIDA-01042 — Modular battery tester reference design for 50-A, 100-A, and 200-A applications
This reference design provides a modular battery test solution allowing users to have the flexibility to test batteries at different current levels with one design. This design leverages the TIDA-01041 reference design by providing two 100-A battery testers that can work independently or be (...)
Reference designs
TIDA-01057 — Reference Design Maximizing Signal Dynamic Range for True 10 Vpp Differential Input to 20 bit ADC
This reference design is designed for high performance data acquisition(DAQ) systems to improve the dynamic range of 20 bit differential input ADCs. Many DAQ systems require the measurement capability at a wide FSR (Full Scale Range) in order to obtain sufficient signal dynamic range. Many earlier (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RGT) | 16 | Ultra Librarian |
| VSSOP (DGK) | 8 | Ultra Librarian |
| WQFN (RUN) | 10 | Ultra Librarian |
Ordering & quality
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