Datasheet PA94 (Apex) - 10
| Manufacturer | Apex |
| Description | High Voltage Power Operational Amplifiers |
| Pages / Page | 13 / 10 — PA94. GENERAL. TYPICAL APPLICATION. Figure 13: Typical Application. PHASE … |
| File Format / Size | PDF / 1.5 Mb |
| Document Language | English |
PA94. GENERAL. TYPICAL APPLICATION. Figure 13: Typical Application. PHASE COMPENSATION. Gain. CC*
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PA94 GENERAL
Please read Application Note 1 “General Operating Considerations” which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexana‐ log.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits.
TYPICAL APPLICATION
Piezo positioning may be applied to the focusing of segmented mirror systems. The composite mirror may be composed of hundreds of elements, each requiring focusing under computer control. In such com‐ plex systems the PA94 reduces the costs of power supplies and cooling with its advantages of low cost and low quiescent power consumption while increasing circuit density with the SIP.
Figure 13: Typical Application PHASE COMPENSATION Gain CC*
≥100 2.2pF ≥50 4.7pF ≥10 22pF * CC rated for full supply voltage
INTERNAL POWER DISSIPATION AND HEATSINK SELECTION
With the unique combination of high voltage and speed of the PA94, traditional formulas for heatsink selection will falsely lower the apparent power handling capability of this amplifier. To more accurately pre‐ dict operating temperatures refer to Apex Microtechnology Applications Note 1, General Operating Consider‐ ations, paragraph 7. Find total quiescent power (PDQ) by multiplying 0.024A by VSS (total supply voltage). Find output stage quiescent power (PDQOUT) by multiplying 0.00012 by VSS. 10 PA94U Rev R Document Outline PA94 Features Applications Description Figure 1: Equivalent Schematic Typical connection Figure 2: Typical Connection Pinout and Description Table Figure 3: External Connections Specifications Absolute Maximum Ratings Input Gain Output Power Supply Thermal Typical Performance Graphs Safe Operating Area (SOA) Figure 12: SOA General Typical Application Figure 13: Typical Application Phase Compensation Internal Power Dissipation And Heatsink Selection Current Limit Common Mode Input Range Input Protection Figure 14: Overvoltage Protection Power Supply Protection Stability External Components Cautions Package Options Package Style DQ
Please read Application Note 1 “General Operating Considerations” which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexana‐ log.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits.
TYPICAL APPLICATION
Piezo positioning may be applied to the focusing of segmented mirror systems. The composite mirror may be composed of hundreds of elements, each requiring focusing under computer control. In such com‐ plex systems the PA94 reduces the costs of power supplies and cooling with its advantages of low cost and low quiescent power consumption while increasing circuit density with the SIP.
Figure 13: Typical Application PHASE COMPENSATION Gain CC*
≥100 2.2pF ≥50 4.7pF ≥10 22pF * CC rated for full supply voltage
INTERNAL POWER DISSIPATION AND HEATSINK SELECTION
With the unique combination of high voltage and speed of the PA94, traditional formulas for heatsink selection will falsely lower the apparent power handling capability of this amplifier. To more accurately pre‐ dict operating temperatures refer to Apex Microtechnology Applications Note 1, General Operating Consider‐ ations, paragraph 7. Find total quiescent power (PDQ) by multiplying 0.024A by VSS (total supply voltage). Find output stage quiescent power (PDQOUT) by multiplying 0.00012 by VSS. 10 PA94U Rev R Document Outline PA94 Features Applications Description Figure 1: Equivalent Schematic Typical connection Figure 2: Typical Connection Pinout and Description Table Figure 3: External Connections Specifications Absolute Maximum Ratings Input Gain Output Power Supply Thermal Typical Performance Graphs Safe Operating Area (SOA) Figure 12: SOA General Typical Application Figure 13: Typical Application Phase Compensation Internal Power Dissipation And Heatsink Selection Current Limit Common Mode Input Range Input Protection Figure 14: Overvoltage Protection Power Supply Protection Stability External Components Cautions Package Options Package Style DQ
