MAX9027：UCSP, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference

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

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

MAX9025, MAX9026, MAX9027, MAX9028: Functional Diagram

Applications/Uses

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

DataSheet

title	Download file
MAX9025-MAX9028 Data Sheet	MAX9025-MAX9028.pdf

Parametrics

Part Number	Comp- arators	t_PD (ns)	Input Range	V_SUPPLY (Total) (V)	V_SUPPLY (Total) (V)	I_CC per Comp. (µA)	V_OS (mV)	V_OS (mV)	Logic Out	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Comp- arators	typ	Input Range	min	max	max	typ	max	Logic Out	Oper. Temp. (°C)	Package/Pins	See Notes
MAX9027	1	14000	Rail to Rail to Neg. Rail	1.8	5.5	1	0.3	5	Push-Pull	-40 to +85	UCSP/6	$0.46 @1k
MAX9028	1	14000	Rail to Rail to Neg. Rail	1.8	5.5	1	0.3	5	Open Drain	-40 to +85	UCSP/6	$0.42 @1k

Part Number	Comp- arators	Thresh. (V)	Internal Ref. Accuracy (%)	t_PD (µs)	V_SUPPLY (V)	V_SUPPLY (V)	I_CC (µA)	Prog. Hyst.	V_OS (mV)	V_OS (mV)	Logic Out	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Comp- arators	Thresh. (V)	Internal Ref. Accuracy (%)	typ	min	max	max	Prog. Hyst.	typ	max	Logic Out	Oper. Temp. (°C)	Package/Pins	See Notes
MAX9025	1	1.236	1	20	1.8	5.5	1.7	No	0.3	5	Push-Pull	-40 to +85	UCSP/6	$0.67 @1k
MAX9026	1	1.236	1	20	1.8	5.5	1.7	No	0.3	5	Open Drain	-40 to +85	UCSP/6	$0.67 @1k

Quality and Environmental Data

MAX9027.pdf

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX9027EBT+	Active		UCSP,;6 pin;1.6 mm²	-40°C to +85°C	Lead Free
MAX9027EBT+T	Active		UCSP,;6 pin;1.6 mm²	-40°C to +85°C	Lead Free
MAX9027EBT-T	No Longer Available	MAX9027EBT+T	UCSP,;6 pin;1.6 mm²	-40°C to +85°C	No

MAX9025-MAX9028.pdf MAX9026

MAX9027.pdf MAX9027

MAX9025-MAX9028.pdf MAX9028