ams AS1974 Low-voltage single/dual/quad comparator Datasheet

a u s t ri a m i c r o s y s t e m s
AS1970 - AS1975
Product Brief
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
!
Single-Supply Operation: 2.5 to 3.6V
!
The comparators are available as the standard products
listed in Table 1.
Common-Mode Input Voltage Range Extends
250mV Above the Rails
!
Low Propagation Delay: 300ns
Table 1. Standard Products
!
Minimized Overall Power Consumption
The AS1970 - AS1975 are single/dual/quad comparators that operate with supplies from 2.5 to 3.6V making
them perfect for all 3 volt applications. The comparators
can also operate with dual supplies (±1.25 to ±1.8V),
and require very little supply current (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
!
Supply Current @1MHz Switching Frequency: 80µA
AS1970/AS1972/AS1974
Push/Pull
!
No Phase Reversal for Overdriven Inputs
AS1971/AS1973/AS1975
Open-Drain
!
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 3.6V > 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.
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.
3 Applications
The devices are ideal for battery-powered systems,
mobile communication devices, zero-crossing detectors,
window comparators, 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
AS1970/AS1971
–
INAOUTA
INB+
INB-
INB+
VCC
+
INBVCC
+
–
AS1972/AS1973
INC+
OUTB
INCIND+
VEE
INDVCC
www.austriamicrosystems.com
Revision 0.1
+
–
OUTA
+
–
OUTB
+
–
OUTC
+
–
AS1974/AS1975
OUTD
VEE
1-2
austriam i c r o systems
AS1970 - AS1975
Product Brief
Copyrights
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to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information.
This product is intended for use in normal commercial applications. Applications requiring extended temperature
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production flow, such as test flow or test location.
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Tel: +43 (0) 3136 500 0
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