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PDF ( 数据手册 , 数据表 ) ISL21440

零件编号 ISL21440
描述 Micropower Voltage Reference
制造商 Intersil
LOGO Intersil LOGO 


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ISL21440 数据手册, 描述, 功能
ISL21440
Micropower Voltage Reference with Comparator
The ISL21440 is a micropower, FGA reference, and comparator
on a single chip. Drawing less than 5µA supply current across
the full operating temperature range, the ISL21440 operates
from a single 2V to 11V supply and can also be used with split
bipolar supplies.
The ISL21440’s on-board reference provides a 1.182V ±0.5%
output. It features programmable hysteresis and TTL/CMOS
compatible outputs that sink and source current. Low bias
currents permit high value divider resistors for typical circuit
current drains of <2.5µA.
The low supply current makes the ISL21440 ideal for battery
powered devices in battery level or low voltage monitor
circuits.
The ISL21440 is a pin-compatible, performance upgrade of
the LTC1440, LTC1540, MAX921, and MAX931.
DATASHEET
FN6532
Rev.4.00
Mar 24, 2017
Features
• 5µA supply current across full temperature range
• Wide supply range . . . . . . . . . . . . . . . . . . . . . . . . . . . 2V to 11V
• Precision 1.182V ±0.5% voltage reference
• Comparator with user programmable hysteresis
• Temperature range . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
• 8 Ld MSOP and 8 Ld TDFN packages
• Pin compatible upgrade to MAX921 and LTC1440
Applications
• Low battery detector
• Low voltage reset
• Overvoltage monitor
• Window comparator
VBAT
2.4M
1.8M
20k
2.4M
VDD
IN+
+
IN- -
HYST
REF
V+
OUT LoBAT-
ISL21440
V- GND
LOW BATTERY DETECTOR
FIGURE 1. TYPICAL APPLICATION
1.190
1.188
V+ = 3V
1.186
1.184 V+ = 5V
1.182
1.180
1.178
1.176
V+ = 2V
1.174
1.172
-40 -20 0
20 40 60 80 100
TEMPERATURE (°C)
FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE
120
FN6532 Rev.4.00
Mar 24, 2017
Page 1 of 15







ISL21440 pdf, 数据表
ISL21440
Typical Performance Curves (Continued)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0-60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60
IN+ - IN- (mV)
FIGURE 18. HYSTERESIS - 0mV (V+ = 3V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0-60-55 -50 -45 -40 -35 -30 -25-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60
IN+ - IN- (mV)
FIGURE 19. HYSTERESIS - 12.5mV (V+ = 3V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60
IN+ - IN- (mV)
FIGURE 20. HYSTERESIS - 25mV (V+ = 3V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0-60 -55 -50 -45 -40 -35-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60
IN+ - IN- (mV)
FIGURE 21. HYSTERESIS - 37.5mV (V+ = 3V)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0-60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60
IN+ - IN- (mV)
FIGURE 22. HYSTERESIS - 50mV (V+ = 3V)
200
180
160
140
120
100
80 3V
60
40
5V
20
010 20 30 40 50 60 70 80 90 100 110 120
INPUT VOLTAGE (mV)
FIGURE 23. OUTPUT RESPONSE TIME vs INPUT OVERDRIVE (tPHL)
FN6532 Rev.4.00
Mar 24, 2017
Page 8 of 15














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