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MAX918
SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference
Ideal for 2-Cell Battery Monitoring in Portable Equipment
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The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5% reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management.
The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.
The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.
Key Features
- Ultra-Low Supply Current
- 380nA per Comparator (MAX919/MAX920)
- 750nA per Comparator with Reference (MAX917/MAX918)
- Guaranteed to Operate Down to +1.8V
- Internal 1.245V ±1.5% Reference (MAX917/MAX918)
- Input Voltage Range Extends 200mV Beyond-the-Rails
- CMOS Push-Pull Output with ±8mA Drive Capability (MAX917/MAX919)
- Open-Drain Output Versions Available (MAX918/MAX920)
- Crowbar-Current-Free Switching
- Internal Hysteresis for Clean Switching
- No Phase Reversal for Overdriven Inputs
- Space-Saving SOT23 Package
Applications/Uses
- 2-Cell Battery Monitoring/Management
- Medical Instruments
- Mobile Communications
- Notebooks and PDAs
- Sensing at Ground or Supply Line
- Telemetry and Remote Systems
- Threshold Detectors/Discriminators
- Ultra-Low-Power Systems
Parametric specs for Comparators
| tPD (ns) (typ) | 22000 |
| VOS (mV) (max) | 5 |
| VSUPPLY (Total) (V) (min) | 1.8 |
| VSUPPLY (Total) (V) (max) | 5.5 |
| # Comparators | 1 |
| Input Range | Rail to Rail to Neg. Rail |
| ICC per Comp. (µA) (max) | 0.8 |
| Logic Out | Push-Pull |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 SOT23/5 |
| Budgetary Price (See Notes) | $0.69 @1k |
Parametric specs for Comparators + Reference
| tPD (µs) (typ) | 22 |
| VOS (mV) (max) | 10 |
| VSUPPLY (V) (min) | 1.8 |
| VSUPPLY (V) (max) | 5.5 |
| # Comparators | 1 |
| Thresh. (V) | 1.245 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 SOT23/5 |
| Budgetary Price (See Notes) | $1.00 @1k |
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Technical Docs
| Data Sheet | SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference | Dec 06, 2010 |
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Support & Training
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Parameters
Parametric specs for Comparators
| tPD (ns) (typ) | 22000 |
| VOS (mV) (max) | 5 |
| VSUPPLY (Total) (V) (min) | 1.8 |
| VSUPPLY (Total) (V) (max) | 5.5 |
| # Comparators | 1 |
| Input Range | Rail to Rail to Neg. Rail |
| ICC per Comp. (µA) (max) | 0.8 |
| Logic Out | Push-Pull |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 SOT23/5 |
| Budgetary Price (See Notes) | $0.69 @1k |
Parametric specs for Comparators + Reference
| tPD (µs) (typ) | 22 |
| VOS (mV) (max) | 10 |
| VSUPPLY (V) (min) | 1.8 |
| VSUPPLY (V) (max) | 5.5 |
| # Comparators | 1 |
| Thresh. (V) | 1.245 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 SOT23/5 |
| Budgetary Price (See Notes) | $1.00 @1k |
Key Features
- Ultra-Low Supply Current
- 380nA per Comparator (MAX919/MAX920)
- 750nA per Comparator with Reference (MAX917/MAX918)
- Guaranteed to Operate Down to +1.8V
- Internal 1.245V ±1.5% Reference (MAX917/MAX918)
- Input Voltage Range Extends 200mV Beyond-the-Rails
- CMOS Push-Pull Output with ±8mA Drive Capability (MAX917/MAX919)
- Open-Drain Output Versions Available (MAX918/MAX920)
- Crowbar-Current-Free Switching
- Internal Hysteresis for Clean Switching
- No Phase Reversal for Overdriven Inputs
- Space-Saving SOT23 Package
Applications/Uses
- 2-Cell Battery Monitoring/Management
- Medical Instruments
- Mobile Communications
- Notebooks and PDAs
- Sensing at Ground or Supply Line
- Telemetry and Remote Systems
- Threshold Detectors/Discriminators
- Ultra-Low-Power Systems
Description
The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX917/MAX918 feature an on-board 1.245V ±1.5% reference and draw an ultra-low supply current of only 750nA, while the MAX919/MAX920 (without reference) require just 380nA of supply current. These features make the MAX917–MAX920 family of comparators ideal for all 2-cell battery applications, including monitoring/management.
The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.
The unique design of the output stage limits supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. This design also minimizes overall power consumption under dynamic conditions. The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suitable for mixed-voltage system design.
Technical Docs
| Data Sheet | SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference | Dec 06, 2010 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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