High Precision, Low Noise Operational Amplifiers - OPA228

OPA228 (ACTIVE)

High Precision, Low Noise Operational Amplifiers

 

Description

The OPAx22x series operational amplifiers combine low noise and wide bandwidth with high precision to make them the ideal choice for applications requiring both AC and precision DC performance.

The OPAx227 is unity-gain stable and features high slew rate (2.3V/µs) and wide bandwidth (8MHz). The OPAx228 is optimized for closed-loop gains of 5 or greater, and offers higher speed with a slew rate of 10V/µs and a bandwidth of 33MHz.

The OPAx227 and OPAx228 series operational amplifiers are ideal for professional audio equipment. In addition, low quiescent current and low cost make them ideal for portable applications requiring high precision.

The OPAx227 and OPAx228 series operational amplifiers are pin-for-pin replacements for the industry standard OP-27 and OP-37 with substantial improvements across the board. The dual and quad versions are available for space savings and per channel cost reduction.

The OPAx227, OPAx228, are available in DIP-8 and SO-8 packages. The OPA4227 and OPA4228 are available in DIP-14 and SO-14 packages with standard pin configurations. Operation is specified from –40°C to 85°C.

Features

  • Low Noise: 3nV/√Hz
  • Wide Bandwidth:
    • OPA227: 8 MHz, 2.3 V/µs
    • OPA228: 33 MHz, 10 V/µs
  • Settling Time: 5 µs
    (Significant Improvement Over OP-27)
  • High CMRR: 138 dB
  • High Open-loop Gain: 160 dB
  • Low Input Bias Current: 10 nA Maximum
  • Low Offset Voltage: 75 µV Maximum
  • Wide Supply Range: ±2.5 V to ±18 V
  • OPA227 Replaces OP-27, LT1007, MAX427
  • OPA228 Replaces OP-37, LT1037, MAX437
  • Single, Dual, and Quad Versions

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Parametrics Compare all products in Precision Op Amps

 
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)
Offset Drift (Typ) (uV/C)
Iq per channel (Typ) (mA)
Vn at 1kHz (Typ) (nV/rtHz)
CMRR (Typ) (dB)
Rating
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
Package Size: mm2:W x L (PKG)
Input Bias Current (Max) (pA)
Output Current (Typ) (mA)
Additional Features
Architecture
OPA228 OPA2227 OPA2228 OPA227 OPA4227 OPA4228
1    2    2    1    4    4   
5    5    5    5    5    5   
36    36    36    36    36    36   
33    8    33    8    8    33   
11    2.3    11    2.3    2.3    11   
In
Out   
In
Out   
In
Out   
In
Out   
In
Out   
In
Out   
0.075    0.075    0.075    0.075    0.2    0.2   
0.1    0.1    0.1    0.1    0.3    0.3   
3.7    3.7    3.7    3.7    3.7    3.7   
3    3    3    3    3    3   
138    138    138    138    138    138   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
-55 to 125    -40 to 85    -40 to 85    -55 to 125    -55 to 125    -55 to 125   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
PDIP
SOIC   
1.24 | 1ku    2.07 | 1ku    2.07 | 1ku    1.40 | 1ku    4.53 | 1ku    4.53 | 1ku   
See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)    See datasheet (PDIP)   
10000    10000    10000    10000    10000    10000   
45    45    45    45    45    45   
Decompensated    N/A    Decompensated    N/A    N/A    Decompensated   
Bipolar    Bipolar    Bipolar    Bipolar    Bipolar    Bipolar   

Featured tools and software

WEBENCH® Designer OPA228

Amplifier Topology
 Non-inverting
 Inverting
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 5.0 to 36.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 85.0 °C