1.1nV/rtHz Noise, Low Power, Precision Operational Amplifier in Tiny DFN-8 Package - OPA211

OPA211 (ACTIVE)

1.1nV/rtHz Noise, Low Power, Precision Operational Amplifier in Tiny DFN-8 Package

Recommended alternative parts

  • OPA228  -  Similar to OPA211 but with 0.075mV VIO, 3.8mA Iq and 33MHz GBW
  • OPA365  -  Similar to OPA211 with 2.2V-to-5.5V supply range, 0.2 mV VIO and 5mA Iq
  • OPA835  -  250uA Rail to Rail Voltage Feedback Amplifier

Description

The OPA211 series of precision operational amplifiers achieves very low 1.1nV/Hz noise density with a supply current of only 3.6mA. 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 OPA211 series make these devices an excellent choice as a loop filter amplifier in PLL applications.

In precision data acquisition applications, the OPA211 series of op amps provides 700ns settling time to 16-bit accuracy throughout 10V output swings. This ac performance, combined with only 125µV of offset and 0.35µV/°C of drift over temperature, makes the OPA211 ideal for driving high-precision 16-bit analog-to-digital converters (ADCs) or buffering the output of high-resolution digital-to-analog converters (DACs).

The OPA211 series is specified over a wide dual-power supply range of ±2.25V to ±18V, or for single-supply operation from +4.5V to +36V.

The OPA211 is available in the small DFN-8 (3mm × 3mm), MSOP-8, and SO-8 packages. A dual version, the OPA2211, is available in the DFN-8 (3mm × 3mm) or an SO-8 PowerPAD™ package. This series of op amps is specified from TA = -40°C to +125°C.

Features

  • LOW VOLTAGE NOISE: 1.1nV/Hz at 1kHz
  • INPUT VOLTAGE NOISE: 80nVPP (0.1Hz to 10Hz)
  • THD+N: -136dB (G = 1, f = 1kHz)
  • OFFSET VOLTAGE: 125µV (max)
  • OFFSET VOLTAGE DRIFT: 0.35µV/°C (typ)
  • LOW SUPPLY CURRENT: 3.6mA/Ch (typ)
  • UNITY-GAIN STABLE
  • GAIN BANDWIDTH PRODUCT: 80MHz (G = 100) 45MHz (G = 1)
  • SLEW RATE: 27V/µs
  • 16-BIT SETTLING: 700ns
  • WIDE SUPPLY RANGE: ±2.25V to ±18V, +4.5V to +36V
  • RAIL-TO-RAIL OUTPUT
  • OUTPUT CURRENT: 30mA
  • DFN-8 (3mm × 3mm), MSOP-8, AND SO-8
  • APPLICATIONS
    • PLL LOOP FILTER
    • 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

PowerPAD is a trademark of Texas Instruments.

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Parametrics Compare all products in Precision Amplifier

 
Number of Channels (#)
Total Supply Voltage (Min) (+5V=5, +/-5V=10)
Total Supply Voltage (Max) (+5V=5, +/-5V=10)
Iq per channel (Max) (mA)
Slew Rate (Typ) (V/us)
Vos (Offset Voltage @ 25C) (Max) (mV)
Offset Drift (Typ) (uV/C)
CMRR (Min) (dB)
GBW (Typ) (MHz)
IIB (Max) (pA)
Vn at 1kHz (Typ) (nV/rtHz)
Rail-Rail
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
OPA211 OPA2211A
1     2    
4.5     4.5    
36     36    
4.5     4.5    
27     27    
0.05     0.15    
0.15     0.35    
114     114    
45     45    
125000     175000    
1.1     1.1    
Out     Out    
Catalog     Catalog    
-40 to 125     -40 to 125    
8SOIC
8SON
8VSSOP    
8SO PowerPAD
8SON    
3.45 | 1ku     5.20 | 1ku    

Other qualified versions of OPA211

Version Part Number Definition
Enhanced Product OPA211-EP Supports Defense, Aerospace and Medical Applications
High-Temperature OPA211-HT High-Temperature product for harsh environments

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