900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Advanced Linear Devices

ALD2321 Datasheet Preview

ALD2321 Datasheet

ULTRA LOW VOS EPAD DUAL CMOS ANALOG VOLTAGE COMPARATOR

No Preview Available !

ADVANCED
LINEAR
DEVICES, INC.
ALD2321A/ALD2321B/ALD2321
ULTRA LOW VOS EPAD® DUAL CMOS ANALOG VOLTAGE COMPARATOR
GENERAL DESCRIPTION
The ALD2321A/ALD2321B/ALD2321 is a monolithic Precision Dual Volt-
age Comparator, each having integrated dual complementary output
drivers. It is constructed using advanced silicon gate CMOS technology.
Key features of the ALD2321A/ALD2321B/ALD2321 include very high
input impedance, very low offset voltage utilizing on-chip e-trim (EPAD®
electronic-trimming) technology, flexible multiple output configurations and
fast response time with small overdrive voltage. It is designed for ultra low
level signal detection from high impedance sources. For many applications
the ALD2321A/ALD2321B/ALD2321 can eliminate an input amplification
stage, a precision input bias stage, a signal level shift stage and an output
buffer stage, and do the entire job from low level input signal detection to high
output driver -- all on a single chip.
The input voltage includes ground, making this voltage comparator ideal for
single supply (+5V) or dual supply (± 5V) powered systems. For dual supply
applications, GND pin is connected to the most negative supply instead of
Ground (0.0V). The negative supply voltage can be at any value between
0.0V and -5V. Each voltage comparator is individually trimmed at the factory
for minimum offset voltage at ground voltage potential, making the ALD2321A/
ALD2321B/ALD2321 at its best offset voltage and ready to compare very
low signal level voltages at or near ground potential. Typically a signal less
than 1mV can be resolved and detected reliably without requiring amplifica-
tion. Sensor or detector signals with signal power as low as 0.004pW (4 x
10-15 Watt) can be readily detected.
Each voltage comparator has two complementary output pins, one for
Source Output (OUTH) and the other for Sink Output (OUT). This dual
complementary output allows maximum circuit design flexibility. The out-
puts can be used as Single-Ended Driver, Multiple WIRED-OR Outputs,
Push-Pull Outputs or Complementary Outputs. The Sink Output can be
used as an open drain output, which has current sink capability of up to
50mA. It can also be connected to an external voltage higher or lower than
V+, which provide level shift of the output swing levels from other than V+
to GND. The Source Output can source up to 2mA and can be used to drive
the base terminal of an external NPN bipolar device or the gate of a N-
channel MOSFET device. Alternatively, the two outputs, Source Output and
ORDERING INFORMATION (“L” suffix for lead free version)
Operating Temperature Range *
0°C to +70°C
0°C to +70°C
-55°C to +125°C
16-Pin
Small Outline
Package (SOIC)
16-Pin
Plastic Dip
Package
16-Pin
CERDIP
Package
ALD2321ASCL
ALD2321BSCL
ALD2321SCL
ALD2321APCL
ALD2321BPCL
ALD2321PCL
ALD2321ADC
ALD2321BDC
ALD2321DC
* Contact factory for leaded (non-RoHS) or high temperature versions.
FEATURES
• Ultra low signal power of 4fW detectable
• Ultra low offset voltage of max. 0.2mV
• Ultra low input bias currents of typ. 0.01pA
• Low supply current of 110µA typical
• Virtually eliminates source impedance effects
• Low operating supply voltage of 4V to 10V
• Single (+5V) and dual supply (±5V) operation
• High speed for both small and large level
signals 300ns typical for TTL inputs
• CMOS, NMOS and TTL compatible
• Each comparator has separate push and
pull outputs
• High output sink current - typically 50mA
• Low supply current spikes
• Fanout of 30 TTL loads
APPLICATIONS
• Dual limit window comparator
• Power supply voltage monitor
• Photo-detector sensor circuit
• Relay or LED driver
• Oscillators
• Battery operated instruments
• Remote signal detection
PIN CONFIGURATION
OUT1
OUT1H
-IN1
+IN1
GND
VE11
VE12
N/C*
1
2
3
4
5
6
7
8
16 V+
15 OUT2
14 OUT2H
13 -IN2
12 +IN2
11 VE21
10 VE22
9 N/C*
SCL, PCL, DC PACKAGES
*N/C pins are connected internally.
Do not connect externally.
Rev 2.0 ©2010 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286
www.aldinc.com




Advanced Linear Devices

ALD2321 Datasheet Preview

ALD2321 Datasheet

ULTRA LOW VOS EPAD DUAL CMOS ANALOG VOLTAGE COMPARATOR

No Preview Available !

GENERAL DESCRIPTION (cont'd)
Sink Output, can be connected together to form a push-pull output
which has the combined output capabilities of both channels.
In the dual complementary output mode, each comparator can be
used to drive separate loads. Due to the complementary nature of
the two outputs, only one output is active at any a given time, except
for a limited crossover time. When OUT (sink output) is active ON,
the OUT pin is sinking current and the OUTH pin is OFF and in high
impedance mode. Conversely, if OUTH pin is ON and sourcing
current, OUT pin is OFF. To configure push-pull output, simply
connect OUT (sink output) pin to OUTH pin.
Since each voltage comparator has its own complementary out-
puts, each comparator can be configured to have a different output
type. For example, one comparator output can be connected as
Open Drain output while the other comparator can be wired as
push-pull output. If used to drive capacitive loads, the output DC
current levels are at a very low level, at essentially leakage current
levels, which can be a power saving feature.
The ALD2321A/ALD2321B/ALD2321 can detect and resolve very
low voltage levels at high speed, with little or no overdrive voltage.
Compared with other voltage comparator devices that require 100
mV overdrive voltages, or multiple stage circuits that include input
preamp, etc., the ALD2321A/ALD2321B/ALD2321 can perform all
input to output functions in one device with minimal delay time and
with as low as a 1mV signal.
The ALD2321A/ALD2321B/ALD2321 is supplied with 4 external e-
trim pins, VE11, VE12, VE21, and VE22. These pins are used for
trimming of the voltage comparator offset voltages at the factory,
and normally should be left open unconnected. However, in some
cases these pins can be used as positive/negative feedback pins,
since these pins have a positive/negative factor on the offset
voltage. For example, see TYPICAL APPLICATIONS section
titled "Voltage Comparator With Output Feedback to Provide
Hysteresis."
In a printed circuit board layout, it is suggested that
these pins, along with no connect (N/C) pins 8 and 9,
be surrounded with ground traces to prevent any
possible crosstalk and noise coupling from other signal
sources.
Although not required for most applications, if neces-
sary, small valued capacitors of approximately 1000pF
can be mounted at these pins to ground to further
reduce noise. For information on customized trimming
under different biasing and power supply conditions,
please contact factory.
BLOCK DIAGRAM
INVERTING INPUT
-IN 1 (3)
NONINVERTING INPUT
+IN 1 (4)
(16) V+
- (2) OUT1H
(1) OUT1
+
(7) VE12
(6) VE11
(5) GND
INVERTING INPUT
-IN 2 (13)
NONINVERTING INPUT
+IN 2 (12)
(8) (9)
N/C N/C
- (14) OUT2H
(15) OUT2
+
(10) VE22
(11) VE21
ALD2321 PIN IDENTIFICATION
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SYMBOL
OUT1
OUT1H
-IN1
+IN1
GND
VE11
VE12
N/C
N/C
VE22
VE21
+IN2
-IN2
OUT2H
OUT2
V+
FUNCTION
COMPARATOR 1 SINK OUTPUT
COMPARATOR 1 SOURCE OUTPUT
COMPARATOR 1 INVERTING INPUT
COMPARATOR 1 NON-INVERTING INPUT
GROUND / V- SUPPLY
- VOS E-Trim COMPARATOR 1
+ VOS E-Trim COMPARATOR 1
No Connect/Do Not connect externally
No Connect/Do Not connect externally
+VOS E-Trim COMPARATOR 2
- VOS E-Trim COMPARATOR 2
COMPARATOR 2 NON-INVERTING INPUT
COMPARATOR 2 INVERTING INPUT
COMPARATOR 2 SOURCE OUTPUT
COMPARATOR 2 SINK OUTPUT
V+ SUPPLY
ALD2321A/ALD2321B/ALD2321
Advanced Linear Devices
SIGNAL PROPAGATION
OUTPUT
OUTPUT
INPUT
INPUT
-
INPUT
INPUT
-
-
INPUT
INPUT
INPUT
INPUT
OUTPUT
OUTPUT
-
2 of 11


Part Number ALD2321
Description ULTRA LOW VOS EPAD DUAL CMOS ANALOG VOLTAGE COMPARATOR
Maker Advanced Linear Devices
PDF Download

ALD2321 Datasheet PDF






Similar Datasheet

1 ALD2321 ULTRA LOW VOS EPAD DUAL CMOS ANALOG VOLTAGE COMPARATOR
Advanced Linear Devices
2 ALD2321A ULTRA LOW VOS EPAD DUAL CMOS ANALOG VOLTAGE COMPARATOR
Advanced Linear Devices
3 ALD2321B ULTRA LOW VOS EPAD DUAL CMOS ANALOG VOLTAGE COMPARATOR
Advanced Linear Devices





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy