OPA211AIDGKR Audio Power Amplifier IC Precision Amplifiers 1.1nV/rtHz Noise Lo Pwr Prec Op Amp

1 Features

• Low Voltage Noise: 1.1 nV/√Hz at 1 kHz

• Input Voltage Noise: 80 nVPP (0.1 to 10 Hz)

• THD+N:–136dB(G=1,ƒ=1kHz)

• Offset Voltage: 125 μV (Maximum)

• Offset Voltage Drift: 0.35 μV/°C (Typical)

• Low Supply Current: 3.6 mA/Ch (Typical)

• Unity-Gain Stable

• Gain Bandwidth Product:

  – 80MHz(G=100)

  – 45MHz(G=1)

• Slew Rate: 27 V/μs

• 16-Bit Settling: 700 ns

• Wide Supply Range:

  – ±2.25to±18V,4.5Vto36V

• Rail-to-Rail Output

• Output Current: 30 mA

• SON-8 (3 mm × 3 mm), VSSOP-8, and SOIC-8

2 Applications

• PLL Loop Filters

• Low-Noise, Low-Power Signal Processing

• 16-Bit ADC Drivers

• DAC Output Amplifiers

• Active Filters

• Low-Noise Instrumentation Amps

• Ultrasound Amplifiers

• Professional Audio Preamplifiers

• Low-Noise Frequency Synthesizers

• Infrared Detector Amplifiers

• Hydrophone Amplifiers

• Geophone Amplifiers

• Medical Instrumentation

3 Description

The OPAx211 series of precision operational amplifiers achieves very low 1.1-nV/√Hz noise density with a supply current of only 3.6 mA. This series also offers rail-to-rail output swing, which maximizes dynamic range.

The extremely low voltage and low current noise, high-speed, and wide output swing of the OPAx211 series make these devices an excellent choice as a loop filter amplifier in PLL applications.

In precision data acquisition applications, the OPAx211 series of operational amplifiers provides 700-ns settling time to 16-bit accuracy throughout 10- V output swings. This ac performance, combined with only 125 μV of offset and 0.35 μV/°C of drift over temperature, makes the OPAx211 series suitable for driving high-precision 16-bit analog-to-digital converters (ADCs) or buffering the output of high- resolution digital-to-analog converters (DACs).

The OPAx211 series is specified over a wide dual- power supply range of ±2.25 to ±18 V, or for single- supply operation from 4.5 to 36 V.

The OPA211 is available in the small SON-8 (3 mm × 3 mm), VSSOP-8, and SOIC-8 packages. A dual version (OPA2211) is available in a SON-8 (3 mm × 3 mm) or an SO-8 PowerPADTM package. This series of operational amplifiers is specified from TA = –40°C to +125°C.

Device Information