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Application Report
SLOA163–September 2011
OPA836 Low-Power Op Amp Applications
James Karki ...................................................................................................... High Speed Amplifiers
ABSTRACT
The following circuits show application information for the OPA836 and OPA2836. For simplicity, power
supply decoupling capacitors are not shown in these diagrams.
Contents
1 Non-Inverting Amplifier ..................................................................................................... 3
2 Inverting Amplifier ........................................................................................................... 3
3 Attenuators ................................................................................................................... 4
4 Single Ended to Differential Amplifier .................................................................................... 4
5 Differential to Signal Ended Amplifier .................................................................................... 5
6 Differential to Differential Amplifier ....................................................................................... 5
7 Instrumentation Amplifier ................................................................................................... 6
8 Gain Setting with OPA836 RUN Integrated Resistors ................................................................. 7
9 Input Common-Mode Voltage Range .................................................................................... 8
10 Output Voltage Range ...................................................................................................... 8
11 Split-Supply Operation (±1.25V to ±2.75V) .............................................................................. 9
12 Single-Supply Operation (2.5 V to 5.5 V) ................................................................................ 9
13 Pulse Application with Single-Supply ................................................................................... 12
14 Power-Down Operation ................................................................................................... 13
15 Low Power Applications and the Effects of Resistor Values on Bandwidth ....................................... 14
16 Driving Capacitive Loads ................................................................................................. 15
17 Active Filters ............................................................................................................... 15
18 Audio Frequency Performance .......................................................................................... 16
19 ADC Driver Performance ................................................................................................. 17
20 OPA836 and ADS8326 Combined Performance ...................................................................... 18
21 Layout Recommendations ................................................................................................ 19
List of Figures
1 Non-Inverting Amplifier..................................................................................................... 3
2 Inverting Amplifier........................................................................................................... 3
3 Single Ended to Differential Amplifier .................................................................................... 4
4 CAT 5 Line Driver with Gain = 2 V/V (6 dB)............................................................................. 4
5 Differential to Single Ended Amplifier .................................................................................... 5
6 Differential to Differential Amplifier ....................................................................................... 6
7 Instrumentation Amplifier................................................................................................... 6
8 OPA836IRUN Gain Setting Network ..................................................................................... 7
9 Output Voltage Swing vs Load Resistance.............................................................................. 8
10 Output Voltage Swing vs Load Resistance.............................................................................. 8
11 Output Saturation Voltage vs Load Current ............................................................................. 8
12 Output Saturation Voltage vs Load Current ............................................................................. 8
13 Split Supply Operation ..................................................................................................... 9
14 Single Supply Concept.................................................................................................... 10
15 Non-Inverting Single Supply with Reference........................................................................... 10
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SLOA163–September 2011 OPA836 Low-Power Op Amp Applications
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