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THS4281DGKR Datasheet(PDF) 1 Page - Texas Instruments |
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THS4281DGKR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 31 page www.ti.com FEATURES DESCRIPTION APPLICATIONS + − 100 2.5 ADS8320 10 nF 500 V BAT Load +IN −IN V OUT = I RSENSE 0.2 I RSENSE THS4281 470 pF 470 pF VBAT VBAT W kW W 2.5 kW 500 W W VBAT/2 High-Side, Low Power Current-Sensing System THS4281 SLOS432 – APRIL 2004 VERY LOW-POWER, HIGH-SPEED, RAIL-TO-RAIL INPUT AND OUTPUT VOLTAGE-FEEDBACK OPERATIONAL AMPLIFIER • Very Low Quiescent Current: 750 µA (at 5 V) Fabricated using the BiCom-II process, the THS4281 is a low-power, rail-to-rail input and output volt- • Rail-to-Rail Input and Output: age-feedback operational amplifier designed to – Common-Mode Input Voltage Extends operate over a wide power supply range of 2.7-V to 400 mV Beyond the Rails 15-V single supply, and ±1.35-V to ±7.5-V dual – Output Swings Within 150 mV From the supply. Consuming only 750 µA with a unity gain Rails bandwidth of 90 MHz and a high 35-V/µs slew rate, the THS4281 allows portable or other power-sensitive • Wide -3 dB Bandwidth at 5 V: applications to realize high performance with minimal – 90-MHz @ Gain = +1, 40 MHz @ Gain = +2 power. To ensure long battery life in portable appli- • High Slew Rate: 35 V/µs cations, the quiescent current is trimmed to be less than 900 µA at 25 °C, and 1 mA from –40°C to 85°C. • Fast Settling Time (2-V Step): – 78 ns to 0.1% The THS4281 is a true single-supply amplifier with a specified common-mode input range of 400 mV – 150 ns to 0.01% beyond the rails. This allows for high-side current • Low Distortion @ Gain = +2, VO = 2-Vpp, 5 V: sensing applications without phase reversal con- – -91 dBc at 100 kHz, -67 dBc at 1 MHz cerns. Its output swings to within 40 mV from the rails with 10-k Ω loads, and 150 mV from the rails with • Input Offset Voltage: 2.5 mV (Max at 25 °C) 1-k Ω loads. • Output Current >30 mA (10- Ω Load, 5 V) The THS4281 has a good 0.1% settling time of 78 ns, • Low Voltage Noise of 12.5 nV/ √Hz and 0.01% settling time of 150 ns. The low THD of • Supply Voltages: +2.7 V, 3 V, +5 V, ±5 V, +15 V -87 dBc at 100 kHz, coupled with a maximum offset • Packages: SOT-23, MSOP, and SOIC voltage of less than 2.5 mV, makes the THS4281 a good match for high-resolution ADCs sampling less than 2 MSPS. • Portable/Battery-Powered Applications The THS4281 is offered in a space-saving SOT-23-5 • High Channel Count Systems package, a small MSOP-8 package, and the industry standard SOIC-8 package. • ADC Buffer • Active Filters • Current Sensing Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. FilterPro is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2004, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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