High Precision, Low Noise Operational Amplifiers - OPA228

OPA228 (ACTIVE)

High Precision, Low Noise Operational Amplifiers

Description

The OPA227 and OPA228 series op amps 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 OPA227 is unity gain stable and features high slew rate (2.3V/µs) and wide bandwidth (8MHz). The OPA228 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 OPA227 and OPA228 series op amps are ideal for professional audio equipment. In addition, low quiescent current and low cost make them ideal for portable applications requiring high precision.

The OPA227 and OPA228 series op amps 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 OPA227, OPA228, OPA2227, and OPA2228 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: 8MHz, 2.3V/µs
    • OPA228: 33MHz, 10V/µs
  • SETTLING TIME: 5µs (significant improvement over OP-27)
  • HIGH CMRR: 138dB
  • HIGH OPEN-LOOP GAIN: 160dB
  • LOW INPUT BIAS CURRENT: 10nA max
  • LOW OFFSET VOLTAGE: 75µV max
  • WIDE SUPPLY RANGE: ±2.5V to ±18V
  • OPA227 REPLACES OP-27, LT1007, MAX427
  • OPA228 REPLACES OP-37, LT1037, MAX437
  • SINGLE, DUAL, AND QUAD VERSIONS
  • APPLICATIONS
    • DATA ACQUISITION
    • TELECOM EQUIPMENT
    • GEOPHYSICAL ANALYSIS
    • VIBRATION ANALYSIS
    • SPECTRAL ANALYSIS
    • PROFESSIONAL AUDIO EQUIPMENT
    • ACTIVE FILTERS
    • POWER SUPPLY CONTROL

SPICE model available for OPA227 at www.ti.com
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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)
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
OPA228 OPA2227 OPA2228 OPA227 OPA4227 OPA4228
1     2     2     1     4     4    
5     5     5     5     5     5    
36     36     36     36     36     36    
3.8     3.8     3.8     3.8     3.8     3.8    
11     2.3     11     2.3     2.3     11    
0.075     0.075     0.075     0.075     0.075     0.075    
0.1     0.1     0.1     0.1     0.3     0.3    
120     120     120     120     120     120    
33     8     33     8     8     33    
10000     10000     10000     10000     10000     10000    
3     3     3     3     3     3    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
  -40 to 85            
8PDIP
8SOIC    
8PDIP
8SOIC    
8PDIP
8SOIC    
8PDIP
8SOIC    
14PDIP
14SOIC    
14PDIP
14SOIC    
1.10 | 1ku     1.85 | 1ku     1.85 | 1ku     1.25 | 1ku     4.05 | 1ku     4.05 | 1ku    

Featured tools and software

WEBENCH® OPA228
 
    Filter Type
  Lowpass
Highpass
Bandpass
 
  Cutoff Frequency  Hz  
  Gain  dB  
  Filter Response  
  Filter Order  
 
 
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