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
` Wide -3 dB Bandwidth at 5 V:
` 90-MHz @ Gain = +1, 40 MHz @ 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 @ 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- Load, 5 V)
` Low Voltage Noise of 12.5 nV/
` Supply Voltages: +2.7 V, 3 V, +5 V, ±5 V, +15 V
` Packages: SOT-23, MSOP, and SOIC
Application· Portable/Battery-Powered Applications
· High Channel Count Systems
· ADC Buffer
· Active Filters
· Current Sensing
Pinout
Specifications
| |
UNIT |
| Supply voltage VS to VS+ |
16.5 V |
| Input voltage VI |
±VS± 0.5 V |
| Differential input voltage VID |
±2 V |
| Output current IO |
±100 mA |
| Continuous power dissipation |
See Dissipation Rating Table |
| Maximum junction temperature, any condition, (2) TJ |
150°C |
| Maximum junction temperature, continuous operation, long term reliability(2) TJ |
125°C |
| Storage temperature range Tstg |
-65°C to 150°C |
| Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
300°C |
|
ESD ratings |
HBM |
3500V |
| CDM |
1500V |
| MM |
100V |
DescriptionFabricated using the BiCom-II process, the THS4281 is a low-power, rail-to-rail input and output volt- age-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 dualsupply. 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 appli- cations, the quiescent current is trimmed to be less cations, 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 currentsensing applications without phase reversal con- cerns. THS4281's output swings to within 40 mV from the rails with 10-k loads, and 150 mV from the rails with 1-k 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 SOT-23-5 package, a small MSOP-8 package, and the industry standard SOIC-8 package.
THS4281 Data Sheet
