OPA846 Datasheet | Texas Instruments

.ti. SBOS250E - JULY 2002 - REVISED DECEMBER 2008 Wideband, Low-Noise, Voltage-Feedback OPERATIONAL AMPLIFIER Features q HIGH BANDWIDTH: 400MHz (G = +10) q LOW INPUT VOLTAGE NOISE: 1.2n V/√Hz q VERY LOW DISTORTION: - 100d Bc (5MHz) q HIGH SLEW RATE: 625V/µs q HIGH DC ACCURACY: VIO ±150µV q LOW SUPPLY CURRENT: 12.6m A q HIGH GAIN BANDWIDTH PRODUCT: 1750MHz q STABLE FOR GAINS ≥ 7 DESCRIPTION The OPA846 bines very high gain bandwidth and large signal performance with very low input voltage noise, while dissipating a low 12.6m A supply current. The classical differential input stage, along with two stages of forward gain and a high power output stage, bine to make the OPA846 an exceptionally low distortion amplifier with excellent DC accuracy and output drive. The voltage-feedback architecture allows all standard op amp applications to be implemented with very high performance. The bination of low input voltage and current noise, along with a 1.75GHz gain bandwidth product, make the OPA846 an ideal amplifier for wideband transimpedance stages. As a voltage gain stage, the OPA846 is optimized for a flat response at a gain of +10 and is stable down to a gain of +7. +5V Power-supply decoupling not shown. 100p F 0.1µF 50kΩ OPA846 λ IS - 5V 50kΩ 10p F Photodiode 0.2p F - VB High Gain, 20MHz Transimpedance Amplifier APPLICATIONS q HIGH DYNAMIC RANGE ADC PREAMPS q LOW-NOISE, WIDEBAND, TRANSIMPEDANCE AMPLIFIERS q WIDEBAND, HIGH GAIN AMPLIFIERS q LOW-NOISE DIFFERENTIAL RECEIVERS q VDSL LINE RECEIVERS q ULTRASOUND CHANNEL AMPLIFIERS q SECURITY SENSOR FRONT ENDS q UPGRADE FOR THE OPA686, CLC425, AND LMH6624 A new external pensation technique can be used to give a very flat frequency response below the minimum stable gain for the OPA846, further improving its already exceptional distortion performance. Using this pensation makes the OPA846 one of the premier 12- to 16-bit Analog-to-Digital (A/D) converter input drivers. The supply...