1.1nV/rtHz Noise, Low-Power, Precision Operational Amplifier - OPA211

OPA211 (ACTIVE)

1.1nV/rtHz Noise, Low-Power, Precision Operational Amplifier

 

Description

The OPA211 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 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 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 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 ±2.25 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, the OPA2211, is available in the SON-8 (3 mm × 3 mm) or an SO-8 PowerPAD™ package. This series of operational amplifiers is specified from TA = –40°C to +125°C.

Features

  • Low Voltage Noise: 1.1 nV/√Hz at 1 kHz
  • Input Voltage Noise: 80 nVPP (0.1 to 10 Hz)
  • THD + N: –136 dB (G = 1, ƒ = 1 kHz)
  • 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:
    • 80 MHz (G = 100)
    • 45 MHz (G = 1)
  • Slew Rate: 27 V/µs
  • 16-Bit Settling: 700 ns
  • Wide Supply Range: ±2.25 to ±18 V, 4.5 to 36 V
  • Rail-to-Rail Output
  • Output Current: 30 mA
  • SON-8 (3 mm × 3 mm), VSSOP-8, and SOIC-8

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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)
GBW (Typ) (MHz)
Slew Rate (Typ) (V/us)
Rail-to-Rail
Vos (Offset Voltage @ 25C) (Max) (mV)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
CMRR (Typ) (dB)
Rating
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
Offset Drift (Typ) (uV/C)
Package Size (mm2=WxL)
IIB (Max) (pA)
Output Current (Typ) (mA)
Additional Features
Architecture
OPA211 OPA2211A
1     2    
4.5     4.5    
36     36    
45     45    
27     27    
Out     Out    
0.05     0.15    
3.6     3.6    
1.1     1.1    
120     120    
Catalog     Catalog    
-40 to 125     -40 to 125    
SOIC
SON
VSSOP    
SO PowerPAD
SON    
3.45 | 1ku     5.20 | 1ku    
0.15     0.35    
8SON: 9 mm2: 3 x 3
8VSSOP: 15 mm2: 4.9 x 3
8SOIC: 29 mm2: 6 x 4.9    
8SON: 9 mm2: 3 x 3
8SO PowerPAD: 29 mm2: 6 x 4.9    
125000     175000    
30     30    
Shutdown     Shutdown    
Bipolar     Bipolar    

Other qualified versions of OPA211

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

WEBENCH® Designer OPA211

Amplifier Topology
 Non-inverting
 Inverting
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 4.5 to 36.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 125.0 °C