Very Low-Power High Speed Rail-To-Rail Input/Output Voltage Feedback Operational Amplifier
Product details
Parameters
Package | Pins | Size
Features
- Very Low Quiescent Current: 750 µA (at 5 V)
- Rail-to-Rail Input and Output:
- Common-Mode Input Voltage Extends
400 mV Beyond the Rails - Output Swings Within 150 mV From the Rails
- Common-Mode Input Voltage Extends
- Wide –3-dB Bandwidth at 5 V:
- 90 MHz at Gain = +1, 40 MHz at Gain = +2
- High Slew Rate: 35 V/µs
- Fast Settling Time (2-V Step):
- 78 ns to 0.1%
- 150 ns to 0.01%
- Low Distortion at Gain = +2, VO = 2-VPP, 5 V:
- –91 dBc at 100 kHz, –67 dBc at 1 MHz
- Input Offset Voltage: 2.5 mV (Max at +25°C)
- Output Current > 30 mA (10-Ω Load, 5 V)
- Low Voltage Noise of 12.5 nV/√Hz
- Supply Voltages: +2.7 V, 3 V, +5 V, ±5 V, +15 V
- Packages: SOT23, MSOP, and SOIC
- APPLICATIONS
- Portable/Battery-Powered Applications
- High Channel Count Systems
- ADC Buffer
- Active Filters
- Current Sensing
All other trademarks are the property of their respective owners.
Description
Fabricated using the BiCom-II process, the THS4281 is a low-power, rail-to-rail input and output, voltage-feedback operational amplifier designed to operate over a wide power-supply range of 2.7-V to 15-V single supply, and ±1.35-V to ±7.5-V dual supply. Consuming only 750 µA with a unity gain bandwidth of 90 MHz and a high 35-V/µs slew rate, the THS4281 allows portable or other power-sensitive applications to realize high performance with minimal power. To ensure long battery life in portable applications, the quiescent current is trimmed to be less than 900 µA at +25°C, and 1 mA from 40°C to +85°C.
The THS4281 is a true single-supply amplifier with a specified common-mode input range of 400 mV beyond the rails. This allows for high-side current sensing applications without phase reversal concerns. Its output swings to within 40 mV from the rails with 10-kΩ loads, and 150 mV from the rails with 1-kΩ loads.
The THS4281 has a good 0.1% settling time of 78 ns, and 0.01% settling time of 150 ns. The low THD of 87 dBc at 100 kHz, coupled with a maximum offset voltage of less than 2.5 mV, makes the THS4281 a good match for high-resolution ADCs sampling less than 2 MSPS.
The THS4281 is offered in a space-saving SOT23-5 package, a small MSOP-8 package, and the industry standard SOIC-8 package.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The THS4281 evaluation module (EVM) User's Guide is included within the Datasheet.
The THS4281EVM provides a platform for evaluating the THS4281 dual, very low-power, high-speed, rail-to-rail input and output, voltage-feedback amplifier. The user needs only power, input signal, and test instruments (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
(...)
Reference designs
Design files
-
download TIPD173 Altium.zip (302KB) -
download TIPD173 Gerber.zip (50KB) -
download TIPD173 BOM (Rev. A).pdf (106KB)
Design files
-
download TIPD115 BOM.pdf (71KB) -
download TIPD115 Gerber.zip (354KB)
Design files
-
download TIPD113 Gerber.zip (1530KB) -
download TIPD113 BOM (Rev. A).pdf (99KB)
Design files
-
download TIPD112 Gerber (Rev. A).zip (1436KB) -
download TIPD112 BOM (Rev. B).pdf (103KB)
Design files
-
download TIPD169 BOM.pdf (125KB)
Design files
-
download TIPD149 BOM.pdf (71KB) -
download TIPD149 Gerber.zip (527KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
SOT-23 (DBV) | 5 | View options |
VSSOP (DGK) | 8 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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