MAX971CSA+ Maxim Integrated Products, MAX971CSA+ Datasheet

IC COMP SNGL OPEN DRAIN LP 8SOIC

MAX971CSA+

Manufacturer Part Number
MAX971CSA+
Description
IC COMP SNGL OPEN DRAIN LP 8SOIC
Manufacturer
Maxim Integrated Products
Type
with Voltage Referencer
Datasheet

Specifications of MAX971CSA+

Number Of Elements
1
Output Type
Open Drain
Voltage - Supply
2.5 V ~ 11 V, ±1.25 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Number Of Channels
1 Channel
Supply Voltage (max)
11 V
Supply Voltage (min)
2.5 V
Supply Current (max)
3.2 uA
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Propagation Delay Time
12 us
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX971–MAX974 and MAX981–MAX984 single/
dual/quad low-voltage comparators feature the lowest
power consumption available. These micropower
devices draw less than 4µA supply current over
temperature (MAX971/MAX972/MAX981/MAX982), and
include an internal 1.182V ±1% (MAX971/MAX973/
MAX974) or ±2% (MAX981–MAX984) voltage reference
and programmable hysteresis.
Ideal for 3V or 5V single-supply applications, these
devices operate from a single 2.5V to 11V supply (or
±1.25V to ±5.5V dual supplies), and each comparator’s
input voltage ranges from the negative supply rail to within
1.3V of the positive supply.
The single MAX971/MAX981 and the dual MAX973/
MAX982/MAX983 provide a unique, simple method for
adding hysteresis without feedback or complicated
equations, simply by using the HYST pin plus two
resistors.
The MAX971–MAX974 and MAX981–MAX984’s open-
drain outputs permit wire-ORed configurations. Thanks to
an 11V output range and separate GND pin for the output
transistor (MAX971/MAX974, MAX981/MAX984), these
devices are ideal for level translators and bipolar to single-
ended converters. For similar devices with complementary
output stages, see the MAX921–MAX924 (1% reference)
and the MAX931–MAX934 (2% reference).
19-0450; Rev 3; 2/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX971
MAX972
MAX973
MAX974
MAX981
MAX982
MAX983
MAX984
None
1%
1%
1%
2%
2%
2%
2%
________________________________________________________________________________________ 1
General Description
1
2
2
4
1
2
2
4
Yes
Yes
Yes
Yes
Yes
No
No
No
Single/Dual-Supply Comparators
8-Pin
DIP/SO/µMAX
8-Pin UCSP/
DIP/SO/µMAX
8-Pin
DIP/SO/µMAX
16-Pin DIP/SO
8-Pin
DIP/SO/µMAX
8-Pin
DIP/SO/µMAX
8-Pin
DIP/SO/µMAX
16-Pin DIP/SO
Ultra-Low-Power, Open-Drain,
o Available in Ultra-Small Packages:
o Ultra-Low Quiescent Current (4µA, max)
o Power Supplies:
o Input Voltage Range Includes Negative Supply
o Internal Bandgap Reference
o 12µs Propagation Delay (10mV Overdrive)
o Output Has Separate GND Pin (MAX9_1/MAX9_4)
Ordering Information continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
MAX971CPA
MAX971CSA
MAX971CUA
Battery-Powered
Systems
Threshold Detectors
Over Extended Temp Range (MAX971/MAX981)
UCSP™ (MAX972)
µMAX (MAX9_1/MAX9_2/MAX9_3)
Single 2.5V to 11V
Dual ±1.25V to ±5.5V
1.182V ±1% (MAX97_)
1.182V ±2% (MAX98_)
PART
V
IN
Typical Operating Circuit
THRESHOLD DETECTOR
3
4
5
6
TEMP RANGE
IN-
HYST
REF
0 C to +70 C
0 C to +70 C
0 C to +70 C
IN+
Ordering Information
V-
7
V+
2
MAX971
MAX981
Window Comparators
Level Translators
Oscillator Circuits
GND
1
Applications
OUT
PIN-PACKAGE
8 Plastic Dip
8 SO
8 µMAX
Features
8

Related parts for MAX971CSA+

MAX971CSA+ Summary of contents

Page 1

... DIP/SO/µMAX No 16-Pin DIP/SO 8-Pin Yes DIP/SO/µMAX 8-Pin Yes DIP/SO/µMAX 8-Pin Yes DIP/SO/µMAX No 16-Pin DIP/SO UCSP is a trademark of Maxim Integrated Products, Inc. Features Applications Window Comparators Level Translators Oscillator Circuits Ordering Information TEMP RANGE PIN-PACKAGE + Plastic Dip + + µMAX ...

Page 2

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators ABSOLUTE MAXIMUM RATINGS GND, GND to V-................................-0.3V, +12V Inputs Current: IN_+, IN_-, HYST..............................................20mA Voltage: IN_+, IN_-, HYST ...............(V+ + 0.3V) to (V- - 0.3V) Outputs Current: REF...................................................................20mA OUT_ ................................................................50mA Voltage: REF ...

Page 3

ELECTRICAL CHARACTERISTICS—5V OPERATION (continued) ( GND = 0V MIN A PARAMETER MAX9_2/MAX9_3, I Output Low Voltage MAX9_1/MAX9_4, I Output Leakage Current V REFERENCE (MAX9_1/MAX982/MAX9_3/MAX9_4 ONLY) MAX971/MAX973/ MAX974 Reference Voltage MAX981–MAX984 T ...

Page 4

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators ELECTRICAL CHARACTERISTICS—3V OPERATION (continued) ( GND = 0V MIN PARAMETER Response Time (High-to-Low T A Transition) 1M pullup to V+ Response Time (Low-to-High T A Transition) ...

Page 5

Operating Characteristics ( GND = 0V +25°C, unless otherwise noted.) A OUTPUT VOLTAGE LOW vs. LOAD CURRENT 2 2 1.5 1.0 0 ...

Page 6

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators ( GND = 0V +25°C, unless otherwise noted.) A MAX9_1/MAX972/MAX9_4 TRANSFER FUNCTION 5.0 +5V 4.5 10k 100k 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 ...

Page 7

PIN MAX971/ MAX972 MAX982 MAX981 DIP/SO/ DIP/SO/ DIP/SO/ UCSP µMAX µMAX µMAX 1 — — — — — — 4 — — — 5 — — — — ...

Page 8

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators PIN NAME MAX974 MAX984 1 OUTB 2 OUTA INA- 5 INA+ 6 INB- 7 INB+ 8 REF INC- 11 INC+ 12 IND- 13 IND+ 14 GND 15 OUTD 16 OUTC ...

Page 9

Detailed Description The MAX971–MAX974/MAX981–MAX984 comprise various combinations of a micropower 1.182V reference and micropower comparators. The Typical Operating Circuit shows the MAX971/MAX981 configuration, and Figures 1a–1d show the MAX9_2–MAX9_4 configurations. Internal hysteresis in the MAX9_1, MAX982, and MAX9_3 provides the ...

Page 10

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators THRESHOLDS IN+ HYSTERESIS IN- BAND REF HYST HB OUT Figure 2. Threshold Hysteresis Band Low-Voltage Operation The guaranteed minimum operating voltage is 2.5V (or ±1.25V). As the total supply ...

Page 11

Information Hysteresis increases the comparators’ noise margin by increasing the upper threshold and decreasing the lower threshold (Figure 2). Hysteresis (MAX9_1/MAX982/MAX9_3) To add hysteresis to the MAX9_1, MAX982, or MAX9_3, connect resistor R1 between REF and HYST, and connect ...

Page 12

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators 2) Select R1. The leakage current into INB- is normally under 1nA, so the current through R1 should exceed 100nA for the thresholds to be accurate. R1 values up to about 10M can be used, but ...

Page 13

WALL ADAPTER 9V DC STEP-DOWN REGULATOR Q1 1M BATTERY (4 CELLS) MAX973 MAX983 953k 4 INB- 470k 1 OUTA 110k 3 INA+ R2 47k Figure 6. Battery Switchover Circuit UCSP Applications Information For the latest application details ...

Page 14

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators TOP VIEW GND 1 8 OUT MAX971 IN REF MAX981 IN HYST DIP/SO/ MAX TOP VIEW (BUMPS ON BOTTOM OUTA V+ OUTB B INA- ...

Page 15

PART TEMP RANGE MAX971EPA - +85 C MAX971ESA - +85 C MAX972CPA +70 C MAX972CSA +70 C MAX972CUA +70 C MAX972EBL-T* - +85 C MAX972EPA ...

Page 16

Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 16 ______________________________________________________________________________________ Package Information ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 © 2003 Maxim Integrated Products ...

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