Datasheet for LM393A Dual Differential Comparator
Description
The LM393A is a dual differential comparator designed to operate from a single power supply over a wide voltage range. It has two independent comparators with separate inputs and outputs. The outputs are compatible with most TTL and CMOS logic families.
Key Features
* Dual differential comparator
* Single power supply operation (2V to 36V)
* TTL and CMOS compatible outputs
* Industry standard pinout
* Low input bias current (20nA)
* High gain (100,000 typical)
* Short circuit protected inputs and outputs
Applications
* Window comparators
* Zero-crossing detectors
* Phase detectors
* Voltage level detectors
* Level shifting
* Signal conditioning
Pin Configuration
«`
+——-+
/ 1 8 |
/ 2 7
|’ 3 6 ‘|
4 5 /
——-/
«`
Pin Description
| Pin | Name | Function |
|—|—|—|
| 1, 2 | Vin+ | Non-inverting inputs |
| 3, 4 | Vin- | Inverting inputs |
| 5, 6 | Vout | Outputs |
| 7 | Vcc | Positive power supply |
| 8 | Vss | Negative power supply |
Electrical Characteristics
| Parameter | Condition | Value |
|—|—|—|
| Supply voltage | — | 2V to 36V |
| Input voltage range | — | -0.3V to Vcc+0.3V |
| Input bias current | — | 20nA |
| Differential input voltage | — | 100mV |
| High output voltage | IOH=-2mA | Vcc-1.5V |
| Low output voltage | IOL=16mA | 0.2V |
| Output sink current | — | 16mA |
| Output source current | — | 2mA |
| Gain | — | 100,000 |
Typical Performance Curves
[Image of typical performance curves]
Applications Information
* Window Comparators: The LM393A can be used to create window comparators to detect signals that fall within a specified voltage range.
* Zero-Crossing Detectors: The LM393A can be used as a zero-crossing detector to generate a square wave synchronized to the zero crossings of an AC signal.
* Phase Detectors: The LM393A can be used as a phase detector to compare the phase of two AC signals.
* Voltage Level Detectors: The LM393A can be used to detect whether a voltage level is above or below a specified threshold.
* Level Shifting: The LM393A can be used to shift voltage levels between different logic families.
* Signal Conditioning: The LM393A can be used to amplify, filter, and otherwise condition signals for use in other circuits.
Package Options
* 8-pin PDIP
* 8-pin SOIC
Orderable Part Numbers
* LM393A-N PDIP
* LM393A-NSOIC SOIC
Related Products
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