OPA2846

更新时间： 2024-11-27 21:54:35

品牌	Logo	应用领域
德州仪器 - TI		放大器
页数	文件大小	规格书
21页	556K
描述
Quad, Differential I/O, 2X1 Multiplexed High Gain Preamp

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OPA2846 数据手册

MPA4609

SBOS252D – AUGUST 2002 – REVISED MARCH 2005

Quad, Differential I/O, 2X1 Multiplexed

High Gain Preamp

DESCRIPTION

FEATURES

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.

● 4 DIFFERENTIAL OUTPUT CHANNELS

● 2 SETS OF 4 DIFFERENTIAL INPUTS

● 90MHz BANDWIDTH UP TO 3.5V_PPOUTPUT

● GAIN OF 190V/V (No External Load)

● LOW 0.65nV/√Hz INPUT NOISE VOLTAGE

● 50mA QUIESCENT CURRENT (5V Supply)

● LOW CROSSTALK, TQFP-48 PACKAGING

● TTL/CMOS CHANNEL SELECT LINE

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 470Ω-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 940Ω resistor across

the output pins will reduce the nominal differential gain by

half to 95V/V.

APPLICATIONS

● TAPE PREAMP

● TEST EQUIPMENT

● MULTI-CHANNEL TWISTED PAIR RECEIVER

● SAW FILTER POSTAMPLIFIER

● HIGH GAIN QUAD ADC DRIVERS

● ULTRA SOUND PRE-AMPLIFIERS

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 3.5V_PPcentered 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.

RELATED PARTS

PART NUMBER

OPA2846

DESCRIPTION

Dual, Low-Noise Op Amp

Octal, 10-Bit 40MSPS ADC

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.

ADS5121

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.

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.

www.ti.com

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