AS1970 Datasheet, PDF (1/2 Pages) ams AG – Low-Voltage Single/Dual/Quad Comparators

austriamicrosystems
AS1970 - AS1975
Low-Voltage Single/Dual/Quad Comparators
Product Brief
1 General Description
The AS1970 - AS1975 are single/dual/quad compara-
tors 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 mini-
mal propagation delay (300ns).
Low input bias current (1.0pA, typ), low input offset volt-
age (0.5mV, typ), and internal hysteresis (3mV) make
these comparators ideal for low-power single-cell appli-
cations including power-management and power-moni-
toring systems.
The comparators are available as the standard products
listed in Table 1.
Table 1. Standard Products
Model
Output Type
AS1970/AS1972/AS1974
Push/Pull
AS1971/AS1973/AS1975
Open-Drain
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.
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
! Common-Mode Input Voltage Range Extends
250mV Above the Rails
! Low Propagation Delay: 300ns
! Minimized Overall Power Consumption
! Supply Current @1MHz Switching Frequency: 80µA
! No Phase Reversal for Overdriven Inputs
! Package Types:
- 5-pin SOT23 – AS1970/AS1971
- 8-pin MSOP – AS1972/AS1973
- 14-pin TSSOP – AS1974/AS1975
3 Applications
The devices are ideal for battery-powered systems,
mobile communication devices, zero-crossing detectors,
window comparators, threshold detectors/discrimina-
tors, ground/supply-sensing applications,
IR receivers or any other space-limited application with
low power-consumption requirements.
Figure 1. Block Diagrams
IN+
+
IN-
–
OUT
VCC
VEE
AS1970/AS1971
INA+
+
–
INA-
OUTA
INB+
+
–
INB-
OUTB
VCC AS1972/AS1973 VEE
INA+
INA-
INB+
INB-
INC+
INC-
IND+
IND-
VCC
+
–
+
–
+
–
+
–
AS1974/AS1975
OUTA
OUTB
OUTC
OUTD
VEE
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