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MAX917, MAX918, MAX919, MAX920
SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference
Ideal for 2-Cell Battery Monitoring in Portable Equipment
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Status
Active: In Production.
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.
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Data Sheet
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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
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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
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Key Specifications:
| Comparators |
| Part Number |
Comp-
arators |
tPD
(ns) |
Input Range |
VSUPPLY (Total)
(V) |
VSUPPLY (Total)
(V) |
ICC per Comp.
(µA) |
VOS
(mV) |
VOS
(mV) |
Logic Out |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
min |
max |
max |
typ |
max |
max w/pins |
See Notes |
| MAX919 |
1 |
22000 |
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1.8 |
5.5 |
0.8 |
1 |
5 |
Push-Pull |
-40 to +85 |
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9 |
$0.73 @1k |
| MAX920 |
Open Drain |
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$0.73 @1k |
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See All Comparators (80)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| Comparators + Reference |
| Part Number |
Comp-
arators |
Thresh.
(V) |
Internal Ref. Accuracy
(%) |
tPD
(µs) |
VSUPPLY
(V) |
VSUPPLY
(V) |
ICC
(µA) |
Prog. Hyst. |
VOS
(mV) |
VOS
(mV) |
Logic Out |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| typ |
min |
max |
max |
typ |
max |
max w/pins |
See Notes |
| MAX917 |
1 |
1.245 |
1.5 |
22 |
1.8 |
5.5 |
1.3 |
No |
1 |
10 |
TTL/CMOS |
-40 to +85 |
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9 |
$1.06 @1k |
| MAX918 |
Open Drain |
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$1.06 @1k |
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See All Comparators + Reference (47)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Notes and Comments
Nanopower, SOT23, comparator with reference
More Information
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Information Index
Document Ref.: 19-1512
Rev 2;
2010-12-06
This page last modified: 2010-12-06
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