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PDF MAX9065 Data sheet ( Hoja de datos )
| Número de pieza | MAX9065 | |
| Descripción | Window Comparator | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9065 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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19-4224; Rev 1; 10/08
EVALUATION KIT
AVAILABLE
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
General Description
The MAX9065 is an ultra-small, low-power, window com-
parator ideal for a wide variety of portable electronics
applications such as cell phones, portable media play-
ers, and notebooks that have extremely tight board
space and power constraints. It comes in both a 4-bump
UCSP™ package with a 1mm x 1mm footprint (as small
as two 0402 resistors) and a 5-pin SOT23 package.
The MAX9065 features a common-mode input range of
-0.3V to +5.5V independent of supply voltage. The
input current goes to zero when the MAX9065 is pow-
ered down (VCC = 0). Additionally, the MAX9065 fea-
tures high RF immunity.
The MAX9065 has a push-pull output and consumes
only 1µA (max) supply current. The MAX9065 operates
down to 1.0V over the extended -40°C to +85°C tem-
perature range.
Applications
Cell Phones
Portable Media Players
Electronic Toys
Notebook Computers
Portable Medical Devices
Features
♦ Tiny 1mm x 1mm 4-Bump UCSP
Footprint = Two 0402 Resistors
Also Available in 5-Pin SOT23 Package
♦ Ultra-Low Power Operating Current
1µA (max)
♦ -0.3V to +5.5V Input Voltage Range
♦ 1.0V to 5.5V VCC Range
♦ 3.0V and 4.2V Trigger Points
♦ -40°C to +85°C Extended Temperature Range
Ordering Information
PART
PIN-PACKAGE
TOP MARK
MAX9065EBS+
4 UCSP
AGC
MAX9065EUK+
5 SOT23
AFFL
Note: All devices are specified over the extended -40°C to
+85°C operating temperature range.
+Denotes a lead-free/RoHS-compliant package.
www.DataSheet4U.com
Pin Configurations
TOP VIEW
(BUMPS ON BOTTOM)
MAX9065
OUT A1
A2
VCC B1
B2
UCSP
TOP VIEW
+
VCC 1
5 OUT
IN
GND 2
MAX9065
GND
GND 3
4 IN
SOT23
Typical Operating Circuit
1.0V TO 5.5V
IN
VLOWER
VUPPER
VCC
0.1μF
VCC
MAX9065
0.2V
REF
VDD
OUT I/O MICRO
CONTROLLER
N
GND
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
Ultra-Small, Low-Power, Window Comparator
in 4 UCSP and 5 SOT23
Pin Description
PIN
SOT23 UCSP
1 B1
2, 3 B2
4 A2
5 A1
NAME
FUNCTION
VCC
GND
IN
OUT
External Supply Input. Bypass
to ground with a 0.1µF bypass
capacitor.
Ground
Window Comparator Input
Push-Pull Output
Detailed Description
The MAX9065 is an extremely small window compara-
tor designed for compact, low-current applications, fea-
turing a supply current of less than 1µA (max).
Operation
At the heart of the MAX9065 are two comparators, a
resistor-divider with a disconnect switch, a 200mV ref-
erence, digital logic circuitry, and an output stage (see
the Typical Operating Circuit).
The digital logic circuitry and the output stage together
behave like an AND gate. The gate’s inputs are the out-
puts of the two comparators. When either comparator’s
output is low, the output asserts low. When both com-
parator’s outputs are high, the output asserts high.
When power is applied to VCC, the n-channel FET at
the bottom of the resistor-divider is turned on. The
resistor-divider provides two voltages, VUPPER and
VLOWER, for comparison with an internal 0.2V reference
www.DavtaoSlthaegeet4.UW.chomen the input voltage exceeds 4.2V, VUPPER
is greater than 0.2V, causing the output to assert low.
When the input voltage falls below 3.0V, VLOWER is less
Table 1. MAX9065 Operation
INPUT VOLTAGE
VIN > 4.2V
3.0V < VIN < 4.2V
VIN < 3.0V
OUTPUT
Low
High
Low
than 0.2V, causing the output also to assert low. With
the input voltage between 3.0V and 4.2V, the output
asserts high, indicating that the input voltage is within
the desired range. Table 1 summarizes the operation of
the MAX9065.
When VCC goes to 0V, the n-channel FET is turned off,
eliminating the resistor-divider as a leakage path for
current.
Applications
The MAX9065 is designed specifically to monitor the
voltage on a single lithium battery. Keeping the voltage
on a lithium battery within a tight range is important to
prevent damage to the battery. Specifically, ensuring
that the battery’s voltage neither exceeds 4.2V nor falls
below 3.0V lengthens the lifetime of the battery and
avoids any hazardous battery conditions.
Hysteresis
There are four trip points for hysteresis. See Figure 1.
Power-Supply Considerations
Bypass VCC with a 0.1µF capacitor to ground.
Chip Information
PROCESS: BiCMOS
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet MAX9065.PDF ] | |
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