90MHz, 22V/us 16-Bit Accurate Operational Amplifier

The LT1468 is a precision high speed operational amplifier with 16-bit accuracy and 900ns settling to 150μV for 10V signals. This unique blend of precision and AC performance makes the LT1468 the optimum choice for high accuracy applications such as DAC current-to-voltage conversion and ADC buffers. The initial accuracy and drift characteristics of the input offset voltage and inverting input bias current are tailored for inverting applications.

The 90MHz gain bandwidth ensures high open-loop gain at frequency for reducing distortion. In noninverting applications such as an ADC buffer, the low distortion and DC accuracy allow full 16-bit AC and DC performance.

The 22V/μs slew rate of the LT1468 improves large-signal performance in applications such as active filters and instrumentation amplifiers compared to other precision op amps.

The LT1468 is manufactured on a complementary bipolar process. It is available in a space saving 3mm × 3mm leadless package, as well as small outline and DIP packages.

Applications

* 16-Bit DAC Current-to-Voltage Converter

* Precision Instrumentation

* ADC Buffer

* Low Distortion Active Filters

* High Accuracy Data Acquisition Systems

* Photodiode Amplifiers

* 90MHz Gain Bandwidth, f = 100kHz

* 22V/µs Slew Rate

* Settling Time: 900ns (AV = -1, 150µV, 10V Step)

* Low Distortion, −96.5dB for 100kHz, 10VP-P

* Maximum Input Offset Voltage: 75µV

* Maximum Input Offset Voltage Drift: 2µV/°C

* Maximum (−) Input Bias Current: 10nA

* Minimum DC Gain: 1000V/mV

* Minimum Output Swing into 2k: ±12.8V

* Unity Gain Stable

* Input Noise Voltage: 5nV/√Hz

* Input Noise Current: 0.6pA/√Hz

* Total Input Noise Optimized for 1k < RS < 20k

* Specified at ±5V and ±15V