LT1468 90MHz, 22V/µs 16-Bit Accurate Operational Amplifi er FEATURESDESCRIPTION n 90MHz Gain Bandwidth, f = 100kHz The LT®1468 is a precision high speed operational amplifi er n 22V/μs Slew Rate with 16-bit accuracy and 900ns settling to 150μV for 10V n Settling Time: 900ns (AV = –1, 150μV, 10V Step) signals. This unique blend of precision and AC performance n Low Distortion, – 96.5dB for 100kHz, 10VP-P makes the LT1468 the optimum choice for high accuracy n
Maximum Input Offset Voltage: 75μV applications such as DAC current-to-voltage conversion n
Maximum Input Offset Voltage Drift: 2μV/°C and ADC buffers. The initial accuracy and drift character- n Maximum (–) Input Bias Current: 10nA istics of the input offset voltage and inverting input bias n Minimum DC Gain: 1000V/mV current are tailored for inverting applications. n Minimum Output Swing into 2k: ±12.8V The 90MHz gain bandwidth ensures high open-loop gain n Unity Gain Stable at frequency for reducing distortion. In noninverting ap- n Input Noise Voltage: 5nV/√Hz plications such as an ADC buffer, the low distortion and n Input Noise Current: 0.6pA/√Hz DC accuracy allow full 16-bit AC and DC performance. n Total Input Noise Optimized for 1k < RS < 20k n Specifi ed at ±5V and ±15V The 22V/μs slew rate of the LT1468 improves large-signal performance in applications such as active fi lters and APPLICATIONS instrumentation amplifi ers compared to other precision op amps. n 16-Bit DAC Current-to-Voltage Converter The LT1468 is manufactured on a complementary bipolar n Precision Instrumentation process. It is available in a space saving 3mm × 3mm lead- n ADC Buffer less package, as well as small outline and DIP packages. n Low Distortion Active Filters n High Accuracy Data Acquisition Systems L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Photodiode Amplifi ers TYPICAL APPLICATIONTotal Harmonic Distortion vs Frequency16-Bit DAC I-to-V Converter –80 VS = ±15V AV = 2 R –90 L = 2k V 20pF OUT = 10VP-P 16 6k DAC –100 – INPUTS 2k LT1468 VOUT LTC®1597 –110 + 50pF –120 OFFSET: V OPTIONAL NOISE FILTER OS + IB (6kΩ) < 1LSB TOTAL HARMONIC DISTORTION (dB) SETTLING TIME TO 150μV = 1.7μs SETTLING LIMITED BY 6k AND 20pF TO COMPENSATE DAC OUTPUT CAPACITANCE –130 1468 TA01 100 1k 10k 100k FREQUENCY (Hz) 1468 TA02 1468fb 1
