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OPA2846 Datasheet(PDF) 1 Page - Texas Instruments |
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OPA2846 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 21 page MPA4609 SBOS252D – AUGUST 2002 – REVISED MARCH 2005 www.ti.com Copyright © 2002-2005, Texas Instruments Incorporated Quad, Differential I/O, 2X1 Multiplexed High Gain Preamp Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. FEATURES q 4 DIFFERENTIAL OUTPUT CHANNELS q 2 SETS OF 4 DIFFERENTIAL INPUTS q 90MHz BANDWIDTH UP TO 3.5V PP OUTPUT q GAIN OF 190V/V (No External Load) q LOW 0.65nV/ √Hz INPUT NOISE VOLTAGE q 50mA QUIESCENT CURRENT (5V Supply) q LOW CROSSTALK, TQFP-48 PACKAGING q TTL/CMOS CHANNEL SELECT LINE APPLICATIONS q TAPE PREAMP q TEST EQUIPMENT q MULTI-CHANNEL TWISTED PAIR RECEIVER q SAW FILTER POSTAMPLIFIER q HIGH GAIN QUAD ADC DRIVERS q ULTRA SOUND PRE-AMPLIFIERS MPA 4609 PART NUMBER DESCRIPTION OPA2846 Dual, Low-Noise Op Amp ADS5121 Octal, 10-Bit 40MSPS ADC RELATED PARTS DESCRIPTION The MPA4609 is one of the lowest noise, fixed gain, 5V single-supply, differential amplifiers available for amplifica- tion of low-level signals in a variety of system applications. The chip has two sets of four differential input, low-noise amplifiers that are routed to four output stages. Two standard logic input select lines control which set of four input preamps are active. For applications such as tape recorders, four heads in forward and four heads in reverse can be selected at one time. The quad consists of eight differential low noise (0.65nV √Hz) voltage preamps. Two select lines control two pairs of inputs. Each of the output stages provides a nominal 470 Ω-output impedance on each half of the differential output stages. The overall gain of 190V/V may be attenuated by adding an external load resistor between each set of differential out- puts. For example, adding an external 940 Ω resistor across the output pins will reduce the nominal differential gain by half to 95V/V. Internal biasing controls the differential inputs to 2.0V and outputs to a 2.1V common-mode operating level. The maxi- mum no-load differential output swing is 3.5VPP centered on the 2.1V bias level. A low input offset voltage and bias current offset holds the maximum output differential offset to < ±350mV for no-load conditions. The low (3.5pF) input capacitance makes this part useable for applications requiring wide bandwidth and multiple pick- ups often seen in testers, medical equipment, twisted pair receivers, and optical systems. The single +5V supply and its low quiescent current of 50mA make it exceptionally attrac- tive in multi-channel, low power, high bandwidth designs. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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