Document
00286-002
Low Noise, Low Drift Single-Supply Operational Amplifiers
OP113/OP213/OP413
FEATURES
Single- or dual-supply operation Low noise: 4.7 nV/√Hz @ 1 kHz Wide bandwidth: 3.4 MHz Low offset voltage: 100 μV Very low drift: 0.2 μV/°C Unity gain stable No phase reversal
APPLICATIONS
Digital scales Multimedia Strain gages Battery-powered instrumentation Temperature transducer amplifier
GENERAL DESCRIPTION
The OPx13 family of single-supply operational amplifiers features both low noise and drift. It has been designed for systems with internal calibration. Often these processor-based systems are capable of calibrating corrections for offset and gain, but they cannot correct for temperature drifts and noise. Optimized for these parameters, the OPx13 family can be used to take advantage of superior analog performance combined with digital correction. Many systems using internal calibration operate from unipolar supplies, usually either 5 V or 12 V. The OPx13 family is designed to operate from single supplies from 4 V to 36 V and to maintain its low noise and precision performance.
The OPx13 family is unity gain stable and has a typical gain bandwidth product of 3.4 MHz. Slew rate is in excess of 1 V/μs. Noise density is a very low 4.7 nV/√Hz, and noise in the 0.1 Hz to 10 Hz band is 120 nV p-p. Input offset voltage is guaranteed and offset drift is guaranteed to be less than 0.8 μV/°C. Input common-mode range includes the negative supply and to within 1 V of the positive supply over the full supply range. Phase reversal protection is designed into the OPx13 family for cases where input voltage range is exceeded. Output voltage swings also include the negative supply and go to within 1 V of the positive rail. The output is capable of sinking and sourcing current throughout its range and is specified with 600 Ω loads.
PIN CONFIGURATIONS
NULL 1 –IN A 2 +IN A 3
V– 4
OP113
TOP VIEW (Not to Scale)
8 NC 7 V+ 6 OUT A 5 NULL
NC = NO CONNECT
Figure 1. 8-Lead Narrow-Body SOIC_N
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OUT A 1 –IN A 2 +IN A 3 V– 4
OP213
TOP VIEW (Not to Scale)
8 V+ 7 OUT B 6 –IN B 5 +IN B
Figure 2. 8-Lead Narrow-Body SOIC_N
OUT A 1 –IN A 2 +IN A 3 V– 4
OP213
8 V+ 7 OUT B 6 –IN B 5 +IN B
Figure 3. 8-Lead PDIP
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OUT A 1 –IN A 2 +IN A 3 V+ 4 +IN B 5 –IN B 6
OUT B 7 NC 8
OP413
TOP VIEW (Not to Scale)
16 OUT D 15 –IN D 14 +IN D 13 V– 12 +IN C 11 –IN C 10 OUT C 9 NC
NC = NO CONNECT
Figure 4. 16-Lead Wide-Body SOIC_W
Digital scales and other strain gage applications benefit from the very low noise and low drift of the OPx13 family. Other applications include use as a buffer or amplifier for both analogto-digital (ADC) and digital-to-analog (DAC) sigma-delta converters. Often these converters have high resolutions requiring the lowest noise amplifier to utilize their full potential. Many of these converters operate in either singlesupply or low-supply voltage systems, and attaining the greater signal swing possible increases system performance.
The OPx13 family is specified for single 5 V and dual ±15 V operation over the XIND—extended industrial temperature range (–40°C to +85°C). They are available in PDIP and SOIC surface-mount packages.
00286-004
Rev. F
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OP113/OP213/OP413
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3
Electrical Characteristics............................................................. 3 Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6 ESD Caution.................................................................................. 6 Typical Performance Characteristics ............................................. 7 Applications............................................