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Data sheet
THS4508
- Fully Differential Architecture
- Common-Mode Input Range Includes the
Negative Rail - Minimum Gain of 2 V/V (6 dB)
- Bandwidth: 2 GHz
- Slew Rate: 6400 V/µs
- 1% Settling Time: 2 ns
- HD2: -72 dBc at 100 MHz
- HD3: -79 dBc at 100 MHz
- OIP2: 78 dBm at 70 MHz
- OIP3: 42 dBm at 70 MHz
- Input Voltage Noise: 2.3 nV/√Hz (f > 10 MHz)
- Noise Figure: 19.2 dB (G = 10 dB)
- Output Common-Mode Control
- 5-V Power Supply Current: 39.2 mA
- Power-Down Capability: 0.65 mA
- APPLICATIONS
- 5-V Data-Acquisition Systems
- High Linearity ADC Amplifier
- Wireless Communication
- Medical Imaging
- Test and Measurement
The THS4508 is a wideband, fully-differential operational amplifier designed for single-supply 5-V data acquisition systems. It has very low noise at 2.3 nV/√Hz, and extremely low harmonic distortion of -72 dBc HD2 and -79 dBc HD3 at 100 MHz with 2 VPP, G = 10 dB, and 1-Ω load. Slew rate is very high at 6400 Vµs, and with settling time of 2 ns to 1% (2 V step), it is ideal for pulsed applications. It is designed for minimum gain of 6 dB, but is optimized for gain of 10 dB.
To allow for dc coupling to analog-to-digital converters (ADCs), its unique output common-mode control circuit maintains the output common-mode voltage within 5-mV offset (typical) from the set voltage, when set within 0.5 V of mid-supply. The common-mode set point is set to mid-supply by internal circuitry, which may be over-driven from an external source.
The THS4508 is a high-performance amplifier that has been optimized for use in high performance, 5-V single-supply data acquisition systems. The output has been optimized for best performance with its common-mode voltages set to mid-supply, and the input has been optimized for best performance with its common-mode voltage set to 0.7 V. High performance at a low power-supply voltage is ideal for high-performance, single-supply 5-V data-acquisition systems with a minimum parts count. The combined performance of the THS4508 in a gain of 10-dB driving the ADS5500 ADC, sampling at 125 MSPS, is 82-dBc SFDR, and 68.3-dBc SNR with a -1-dBFS signal at 70 MHz.
The THS4508 is offered in a quad 16-pin leadless QFN package (RGT), and is characterized for operation over the full industrial temperature range from -40°C to +85°C.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Wideband Low Noise Low Distortion Fully Differential Amplifier datasheet (Rev. E) | 09 Sep 2008 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | 28 Mar 2017 | ||
| Application note | Driving High-Speed ADCs: Circuit Topologies and System-Level Parameters (Rev. A) | 10 Sep 2010 | ||
| Analog Design Journal | Low-power, high-intercept interface to the ADS5424, 105-MSPS converter | 10 Oct 2005 | ||
| Analog Design Journal | Analysis of fully differential amplifiers | 11 Mar 2005 | ||
| Analog Design Journal | Fully differential amplifiers applications:Line termination,driving high-speed.. | 02 Mar 2005 | ||
| 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.
Evaluation board
THS4508EVM — THS4508 evaluation module
THS4508EVM is an evaluation Module for the RGT (16 pin leadless QFN) package.
The THS4508EVM is designed to demonstrate the functionality and versatility of the device. The EVM is ready for power, signal source, and test instruments. The EVM is configured for a gain of 10 dB and 50 ohm input and (...)
Simulation model
THS4508 TINA-TI Reference Design (Rev. B)
SLOM150B.TSC (76 KB) - TINA-TI Reference Design
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
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RGT) | 16 | Ultra Librarian |
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