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OPA626 Fiches technique(PDF) 1 Page - Texas Instruments |
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OPA626 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 39 page Frequency (kHz) -175 -150 -125 -100 -75 -50 -25 0 0 50 100 150 200 250 300 350 400 450 500 -115.91 dBc (Third Harmonic) THD = -110.8 dBc SNR = 91.88 dB SINAD = 91.86 dB ENOB = 14.97 + 1 k 10 nF 5 V Input Voltage 4.7 1 k 4.7 VREF / 4 RFLT RFLT CFLT 3.3 V REF ADS8860 GND AVDD VREF OPA626 Copyright © 2016, Texas Instruments Incorporated Product Folder Sample & Buy Technical Documents Tools & Software Support & Community An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. OPA626, OPA2626 SBOS690 – JULY 2016 OPAx626 High-Speed, High-Precision, Low-Distortion 16-Bit and 18-Bit Analog-to-Digital Converter (ADC) Drivers 1 1 Features 1 • Excellent Dynamic Performance: – Low Distortion: –122 dBc for HD2 and –140 dBc for HD3 at 100 kHz – Gain Bandwidth (G = 100): 120 MHz – Slew Rate: 115 V/µs – 16-Bit Settling at 4-V Step: 280 ns – Low Voltage Noise: 2.5 nV/ √Hz at 10 kHz – Low Output Impedance: 1 Ω at 1 MHz • Excellent DC Precision: – Offset Voltage: ±100 µV (Maximum) – Offset Voltage Drift: ±3 µV/ºC (Maximum) – Low Quiescent Current: 2 mA (Typical) • Input Common-Mode Range Includes Negative Rail • Rail-to-Rail Output • Wide Temperature Range: Fully Specified from –40°C to +125°C 2 Applications • Precision SAR ADC Drivers • Precision Voltage Reference Buffers • Programmable Logic Controllers • Test and Measurement Equipment • Scientific Instrumentation • High Throughput Data Acquisition Systems • High Density, Multiplexed Data Acquisition Systems 3 Description The OPAx626 family of operational amplifiers are 16- bit and 18-bit, high-precision, SAR ADC drivers with low total harmonic distortion (THD) and noise. This family of precision op amps is fully characterized and specified with a 16-bit settling time of 280 ns that enables a true 16-bit effective number of bits (ENOB). With a high DC precision of only 100 µV offset voltage, a wide gain-bandwidth product of 120 MHz, and a low wideband noise of 2.5 nV/ √Hz, this family is optimized for driving high-throughput, high- resolution SAR ADCs in applications such as the ADS88xx family of SAR ADCs. The OPAx626 family is available in 5-pin SOT and 8-pin VSSOP packages and is specified for operation from –40°C to +125°C. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) OPA626 SOT (5) 2.90 mm × 1.60 mm OPA2626 VSSOP (8) 3.00 mm × 3.00 mm (1) For all available packages, see the package option addendum at the end of the data sheet. spacer SAR ADC Driver High Fidelity Topology Improves Dynamic Performance (fIN = 10-kHz, 1-MSPS FFT) |
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