MAX9025, MAX9026, MAX9027, MAX9028 UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

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The MAX9025–MAX9028 nanopower comparators in space-saving chip-scale (UCSP™) packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1.8V. The MAX9025/MAX9026 feature an on-board 1.236V ±1% reference and draw an ultra-low supply current of only 1µA, while the MAX9027/MAX9028 (without reference) require just 0.6µA of supply current. These features make the MAX9025–MAX9028 family of comparators ideal for all 2-cell battery-monitoring/management applications.

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 MAX9025/MAX9027 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 5mA. The MAX9026/MAX9028 have an open-drain output stage that makes them suitable for mixed-voltage system design. All devices are available in the miniature 6-bump UCSP packages.

Refer to the MAX9117 data sheet for similar comparators in 5-pin SC70 packages and the MAX9017 data sheet for similar dual comparators in 8-pin SOT23 packages.

Key Features

Applications/Uses

Space-Saving UCSP Package (1mm x 1.52mm)
Ultra-Low Supply Current
- 0.6µA (MAX9027/MAX9028)
- 1µA with Reference (MAX9025/MAX9026)
Guaranteed to Operate Down to +1.8V
Internal 1.236V ±1% Reference (MAX9025/MAX9026)
Input Voltage Range Extends 200mV Beyond-the-Rails
CMOS Push-Pull Output with ±5mA Drive Capability (MAX9025/MAX9027)
Open-Drain Output Versions Available (MAX9026/MAX9028)
Crowbar-Current-Free Switching
Internal Hysteresis for Clean Switching
No Phase Reversal for Overdriven Inputs

	2-Cell Battery Monitoring/Management
	Medical Instruments
	Mobile Communications
	Notebooks and PDAs
	Sensing at Ground or Supply Line
	Telemetry and Remote Systems
	Ultra-Low-Power Systems

Key Specifications: Comparators

Part Number

Number per Pkg.

Typ Prop. Delay (ns)

Input CMVR to Neg. Rail

Min. Total Supply (V)

Max. Total Supply (V)

Max. Supply Current per Comp. (µA)

Typ V_OS (mV)

Logic Output

Latched Outputs

Complementary Outputs

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^*

MAX9027

14000

Yes

1.8

5.5

0.3

CMOS

UCSP/6

-40 to +85

$0.40 @ 1k

MAX9028

Open Drain

$0.40 @ 1k

See All Comparators (82)

Key Specifications: Comparators + Reference

Part Number

Comps. per Pkg.

Threshold (V)

Number of Inputs / Thresholds (V)

Threshold Accuracy (%)

Internal Reference Accuracy (%)

Typ Prop. Delay (µs)

Supply Voltage (min) (V)

Supply Voltage (max) (V)

Max. Total Supply Current (µA)

Comp. Inputs Available

Prog. Hyst.

Typ V_OS (mV)

V_OS (max) (mV)

Logic Output

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^*

MAX9025

1.236

1 / 1.236

1.8

5.5

1.7

1 Inv. + 1 Noninv.

0.3

Push-Pull

UCSP/6

-40 to +85

$0.60 @ 1k

MAX9026

Open Drain

$0.60 @ 1k

See All Comparators + Reference (38)

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.