OPA862IDTKR

OPA862IDTKR 1 Features

OPA862IDTKR 3 Description

• Wide Supply Range: 3 V to 12.6 V • High Input Impedance: 325 MΩ • Voltage Noise:– Input-Referred (f ≥ 5 kHz): 2.3 nV/√ Hz– Output-Referred (f ≥ 10 kHz): 8.3 nV/√ Hz • Differential Output Offset: ±700 µV (Maximum) • Output Offset Drift: ±1.5 µV/°C (Typical) • A2 Bias Current Cancellation, IB: ±5 nA (Typical) • Gain-Bandwidth Product: 400 MHz • Small-Signal Bandwidth: 44 MHz (G = 2 V/V) • Slew Rate: 140 V/µs • HD2, HD3 (VOD = 10 VPP, 50 kHz):–122 dBc, –140 dBc • Rail-to-Rail Output:– High Linear Output Current: 60 mA (Typical) • Quiescent Current: 3.1 mA • Disable mode: 12-µA Quiescent Current • Extended Temperature Operation:–40°C to +125°C

OPA862IDTKR 2 Applications

• 16-bit and 18-bit ADC Drivers • Memory and LCD Testers • Data Acquisition (DAQ) • Test and Measurement • Transimpedance Amplifiers (TIA) • Class-D audio Amplifier Drivers • Piezoelectric Sensor Interface • Medical InstrumentationThe OPA862 is a single-ended to differential analog-to-digital converter (ADC) driver with high inputimpedance for directly interfacing with sensors. Thedevice only consumes 3.1-mA quiescent current foran output-referred noise density of 8.3 nV/√ Hz in again of 2-V/V configuration. A fully differential amplifierconfigured in a gain of 1 V/V with 1-kΩ resistorsmust be less than 1 nV/√ Hz to achieve the OPA862equivalent output-referred noise density of8.3 nV/√ Hz. The OPA862 can be configured for othergains using external resistors. The device has a largegain-bandwidth product of 400 MHz and a slew rate of140 V/µs. This yields exceptional linearity and fast-settling, 18-bit performance over comparable single-ended-to-differential ADC drivers. The device includesa reference input pin for setting the output common-mode voltage.The OPA862 is fully characterized to operate over awide supply range of 3 V to 12.6 V, and features arail-to-rail output stage. The device is fabricated usingTexas Instruments' proprietary, high-speed, silicon-germanium (SiGe) process and achieves exceptionaldistortion performance for 18-bit systems. The deviceincludes a disable mode that consumes only 12-µAquiescent current in power-down state.The OPA862 is rated to work over the extendedindustrial temperature range of –40°C to +125°C.Device Information(1)Single-Ended High-Input Impedance SensorInterfaceHarmonic Distortion vs Frequency