OPA227 Datasheet, PDF (1/46 Pages) Burr-Brown (TI) – High Precision, Low Noise OPERATIONAL AMPLIFIERS

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OPA227, OPA2227, OPA4227
OPA228, OPA2228, OPA4228
SBOS110B – MAY 1998 – REVISED JUNE 2015
OPAx22x High Precision, Low Noise Operational Amplifiers
1 Features
•1 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
2 Applications
• Data Acquisition
• Telecom Equipment
• Geophysical Analysis
• Vibration Analysis
• Spectral Analysis
• Professional Audio Equipment
• Active Filters
• Power Supply Controls
100k
Input Referred Noise
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
10k
1k
Current Noise
3 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
OPA227
OPA228
PDIP (8)
SOIC (8)
9.81 mm × 6.35 mm
4.90 mm × 3.91 mm
OPA2227
OPA2228
PDIP (8)
SOIC (8)
9.81 mm × 6.35 mm
4.90 mm × 3.91 mm
OPA4227
OPA4228
PDIP (14)
SOIC (14)
19.30 mm × 6.35 mm
8.65 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
100
10
1
0.1
Voltage Noise
1
10
100
1k
10k
Frequency (Hz)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.