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AS1970 Low Power Single Comparator, Push-Pull Output, SOT23-50 pages
D a ta S he e t
AS1970 - AS1975
L o w - Vo l ta g e S i n g l e / D u a l / Q u a d C o m pa r a t o r s
1 General Description
2 Key Features
!
CMOS Push/Pull Output Sinks and Sources 8mA
(AS1970/AS1972/AS1974)
!
CMOS Open-Drain Output Voltage Extends Beyond
VCC (AS1971/AS1973/AS1975)
!
Quiescent Supply Current: 8.5µA per Comparator
!
Internal Hysteresis: 3mV
!
3V/5V Logic-Level Translation
!
Single-Supply Operation: 2.5 to 5.5V
The comparators are available as the standard products
listed in Table 1.
!
Common-Mode Input Voltage Range Extends
250mV Above the Rails
Table 1. Standard Products
!
Low Propagation Delay: 300ns
The AS1970 - AS1975 are single/dual/quad comparators that operate with supplies from 2.5 to 5.5V making
them perfect for all 3- and 5-volt applications. The comparators can also operate with dual supplies (±1.25 to
±2.75V), and require very little supply current (down to
8.5µA) with minimal propagation delay (300ns).
Low input bias current (1.0pA, typ), low input offset voltage (0.5mV, typ), and internal hysteresis (3mV) make
these comparators ideal for low-power single-cell applications including power-management and power-monitoring systems.
Model
Output Type
!
Minimized Overall Power Consumption
AS1970/AS1972/AS1974
Push/Pull
!
Supply Current @1MHz Switching Frequency: 80µA
AS1971/AS1973/AS1975
Open-Drain
!
No Phase Reversal for Overdriven Inputs
!
Package Types:
- 5-pin SOT23 – AS1970/AS1971
- 8-pin MSOP – AS1972/AS1973
- 14-pin TSSOP – AS1974/AS1975
The AS1970/AS1972/AS1974 push/pull output can sink
or source current.
The AS1971/AS1973/AS1975 open-drain output can be
pulled beyond VCC to a maximum of 5.5V > VEE. These
open-drain versions are ideal for logic-level translators
or bipolar-to-unipolar converters.
Large internal output drivers allow Rail-to-Rail output
swings with loads of up to 8mA.
3 Applications
The AS1970/AS1971 are available in a 5-pin SOT23
package. The AS1972/AS1973 are available in a 8-pin
MSOP package. The AS1974/AS1975 are available in a
14-pin TSSOP package.
The devices are ideal for battery-powered systems,
mobile communication devices, zero-crossing detectors,
window comparators, level translators, threshold detectors/discriminators, ground/supply-sensing applications,
IR receivers or any other space-limited application with
low power-consumption requirements.
Figure 1. Block Diagrams
INA+
INA+
IN+
IN-
+
–
OUT
INA-
VEE
–
INAOUTA
INB+
INB-
INB+
VCC
+
INB-
+
–
INC+
OUTB
INCIND+
AS1970/AS1971
VCC
AS1972/AS1973
VEE
INDVCC
www.austriamicrosystems.com
Revision 1.02
+
–
OUTA
+
–
OUTB
+
–
OUTC
+
–
AS1974/AS1975
OUTD
VEE
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