ald2321 Advanced Linear Devices Inc (ALD), ald2321 Datasheet

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ald2321

Manufacturer Part Number
ald2321
Description
Ultra Low Vos Epad Dual Cmos Analog Voltage Comparator
Manufacturer
Advanced Linear Devices Inc (ALD)
Datasheet

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GENERAL DESCRIPTION
The ALD2321A/ ALD2321B/ ALD2321 is a monolithic Precision Dual
Voltage 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
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 1 mV can be resolved and
detected reliably without requiring amplification. Sensor or detector
signals with signal power as low as 0.004 pW(4 x 10
readily detected.
Each voltage comparator has two complementary output pins, one for
Source Output (OUT
complementary output allows maximum circuit design flexibility. The
outputs 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 50 mA. 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.
ORDERING INFORMATION
* Contact factory for industrial temperature range
© 2004 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
16-pin
Small Outline Package
(SOIC)
ALD2321ASC
ALD2321BSC
ALD2321SC
0 C to +70 C
ULTRA LOW VOS EPAD
A
L
D
INEAR
DVANCED
EVICES,
Operating Temperature Range*
®
electronic-trimming) technology, flexible multiple
H
)and the other for Sink Output (OUT). This dual
I
NC.
ALD2321PC
0 C to +70 C
16-Pin
(PDIP)
Plastic DIP Package
ALD2321APC
ALD2321BPC
®
-55 C to +125 C
DUAL CMOS ANALOG VOLTAGE COMPARATOR
Ceramic DIP Package
ALD2321DC
(CDIP)
16-Pin
ALD2321ADC
ALD2321BDC
-15
Watt) can be
APPLICATIONS
* Low level signal detector
* 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
PRODUCT FEATURES
* Ultra low signal power of 4 fW detectable
* Ultra low offset voltage of max. 0.2 mV
* Ultra low input bias currents of typ. 0.01pA
* Low supply current of 110
* Virtually eliminates source impedance effects
* Low operating supply voltage of 3V to 10V
* Single +5V and dual supply 5V operation
* High speed for both small and large level
* CMOS, NMOS and TTL compatible
* Each comparator has separate push and pull
* High output sink current - typically 50mA
* Low supply current spikes
* Fanout of 30 TTL loads
signals 300ns typical for TTL inputs
outputs
OUT
OUT
*
VE
VE
GND
+IN
N/C
*N/C pins are connected internally. Do not connect externally.
-IN
1H
12
11
1
1
1
*
1
6
7
8
2
3
4
5
DC, PC, SC PACKAGE
ALD2321A/ALD2321B
A typical
10
11
16
15
14
13
12
9
ALD2321
VE
N/C
OUT
VE
V
OUT
+IN
-IN
+
21
22
2
2
*
2
2H

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ald2321 Summary of contents

Page 1

... 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 ...

Page 2

... 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 ...

Page 3

... Common Mode CMRR Rejection Ratio Power Supply Rejection PSRR Ratio Change of Vos / VExx Notes: Consists of junction leakage currents 2 Sample test parameter ALD2321A/ALD2321B ALD2321 2321A 2321B Typ Max Min Typ Max 110 180 110 180 150 50 150 ...

Page 4

... 125 -25 C 1.0 A 0.5 0 OUTPUT SINK CURRENT (mA) ALD2321A/ALD2321B ALD2321 + V = +5V No Load Two Comparators 75 100 125 75 100 125 0 C) 100 10 - Advanced Linear Devices SUPPLY CURRENT vs. SUPPLY VOLTAGE 200 180 ...

Page 5

... AMBIENT TEMPERATURE ( C) COMMON MODE REJECTION RATIO vs. TEMPERATURE 90.0 85.0 80.0 75.0 70.0 65.0 60.0 - -25 AMBIENT TEMPERATURE ( C) RESPONSE TIME FOR VARIOUS INPUT OVERDRIVES 6.0 5.0 4.0 3.0 20mV 5mV 2.0 10mV 1.0 50mV 2mV 0 -1.0 0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 TIME ( S) ALD2321A/ALD2321B ALD2321 1 -2mA 1.2 OH 0.8 0 +5V 0.0 -0.4 -0.8 -1.2 -1.6 -2.0 75 100 125 + 5.1K L -1.0 75 100 125 90.0 85.0 1mV 80 5. 15pF L 75.0 Input Step 70 ...

Page 6

... SUPPLY VOLTAGE (V) PRECISION SINGLE SUPPLY VOLTAGE COMPARATOR WITH DIRECT RELAY DRIVER + ALD2321A/ALD2321B ALD2321 0.5 V+ -0.5 -1.0 0.5 V- -0.5 +2 -2mA OH 0.4 0.3 0.2 0.1 0 TYPICAL APPLICATIONS 5V RELAY Advanced Linear Devices COMMON - MODE VOLTAGE REFERRED TO SUPPL Y VOLTAGE -55 -25 ...

Page 7

... VOLTAGE COMPARATOR WITH OUTPUT FEEDBACK TO PROVIDE HYSTERSIS +5V +5V OUT V R OUT H V E22 V IN 2.2M SHIFT AND HIGH CURRENT LOAD DRIVER +5V + 15K OUT 200 R = Load -5V VOLTAGE COMPARATOR WITH COMPLEMENTARY OUTPUTS 1/2 ALD2321 REF + 1/2 ALD2321 R Load V OUT V OUT 0.066V - ...

Page 8

... Circuit Advanced Linear Devices V+ BUZZER 1/2 ALD2321 V + LIMIT2 - V LIMIT 1/2 ALD2321 LED turns on as photo-detector voltage reaches V LIMIT 1. Both LED and horn turns on as photo- detector voltage reachesV LIMIT 2. V EXTERNAL = +12V +5V PINS OUT 1, OUT 1H, OUT 2, OUT 2H, INTERNAL CIRCUIT CONFIGURATIONS V + OUT 2 OUT 1H ...

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