OPA2822U/2K5中文资料德州仪器数据手册PDF规格书

FEATURES

LOW INPUT NOISE VOLTAGE: 2.0nV/√Hz

HIGH UNITY GAIN BANDWIDTH: 500MHz

HIGH GAIN BANDWIDTH PRODUCT: 240MHz

HIGH OUTPUT CURRENT: 90mA

SINGLE +5V TO +12V OPERATION

LOW SUPPLY CURRENT: 4.8mA/ch

APPLICATIONS

xDSL DIFFERENTIAL LINE RECEIVERS

HIGH DYNAMIC RANGE ADC DRIVERS

LOW NOISE PLL INTEGRATORS

TRANSIMPEDANCE AMPLIFIERS

PRECISION BASEBAND I/Q AMPLIFIERS

ACTIVE FILTERS

DESCRIPTION

The OPA2822 offers very low 2.0nV/√Hz input noise in a

wideband, unity-gain stable, voltage-feedback architecture.

Intended for xDSL receiver applications, the OPA2822 also

supports this low input noise with exceptionally low harmonic

distortion, particularly in differential configurations. Adequate

output current is provided to drive the potentially heavy load

of a passive filter between this amplifier and the codec.

Harmonic distortion for a 2VPP differential output operating

from +5V to +12V supplies is ≤ –100dBc through 1MHz input

frequencies. Operating on a low 4.8mA/ch supply current,

the OPA2822 can satisfy all xDSL receiver requirements

over a wide range of possible supply voltages—from a single

+5V condition, to ±5V, up to a single +12V design.

General-purpose applications on a single +5V supply will

benefit from the high input and output voltage swing available

on this reduced supply voltage. Low-cost precision integrators

for PLLs will also benefit from the low voltage noise and

offset voltage. Baseband I/Q receiver channels can achieve

almost perfect channel match with noise and distortion to

support signals through 5MHz with > 14-bit dynamic range.