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A/D Converter. AD2020 Datasheet

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A/D Converter. AD2020 Datasheet






AD2020 Converter. Datasheet pdf. Equivalent




AD2020 Converter. Datasheet pdf. Equivalent





Part

AD2020

Description

3-Digit A/D Converter



Feature


,. ANALOG W DEVICES - ----- FEATURES l ow Cost 12l lSI Design Multiplexetf Cha racter Serial BCD Output -Support Compo nents Required 10 (including displays) Single +5V Power Supply Required Balanc ed Differential Input Internal Referenc e low Power Consumption (SOmWtypical) S mall Size: 16 Pin Dual-in-Line Wide Tem perature Range: Operating 0 to +7SoC St orage -SSoC to +15.
Manufacture

Analog Devices

Datasheet
Download AD2020 Datasheet


Analog Devices AD2020

AD2020; 0oC Extended Temperature Range Available Upon Special Request 12L 3 DigitAID C onverter II OBSOLETE GENERAL DESCRIPT ION The AD2020 is a low cost 3 digit AI D Converter, needing only 10 additional support components to make a complete 3 digit DPM/DVM. The small total compon ent count, the low cost, and high relia bility allow for a wide variation in di splay applications.


Analog Devices AD2020

, especially those previously utilizing APM's (Analog Panel Meters). The techno logy utilized in the AD2020 is Integrat ed Injection Logic (I2L), an extension of the long proven, high yield bipolar process. This technique offers a signif icantly higher circuit packing density. The input amplifier, comparator, band- gap reference, counters, clock, control logic, multiplexe.


Analog Devices AD2020

r and drivers needed to implement the du al slope conversion, are all included o n a single die. The AD2020, although it has an internal reference, consumes on ly SOmW of power and is operated from a single +5V supply, unlike most DPM chi ps requiring two (2) supplies. The DPM chip is packaged in a standard size 16 pin-dual-in-line package. Utilizing a u nique double passi.

Part

AD2020

Description

3-Digit A/D Converter



Feature


,. ANALOG W DEVICES - ----- FEATURES l ow Cost 12l lSI Design Multiplexetf Cha racter Serial BCD Output -Support Compo nents Required 10 (including displays) Single +5V Power Supply Required Balanc ed Differential Input Internal Referenc e low Power Consumption (SOmWtypical) S mall Size: 16 Pin Dual-in-Line Wide Tem perature Range: Operating 0 to +7SoC St orage -SSoC to +15.
Manufacture

Analog Devices

Datasheet
Download AD2020 Datasheet




 AD2020
,. ANALOG
W DEVICES
- -----
FEATURES
low Cost
12l lSI Design
Multiplexetf Character Serial BCD Output
-Support Components Required 10 (including displays)
Single +5V Power Supply Required
Balanced Differential Input
Internal Reference
low Power Consumption (SOmWtypical)
Small Size: 16 Pin Dual-in-Line
Wide Temperature Range: Operating 0 to +7SoC
Storage -SSoC to +150oC
Extended Temperature Range Available Upon
Special Request
12L
3 DigitAID Converter
II
GENERAL DESCRIPTION
The AD2020 is a low cost 3 digit AID Converter, needing only
10 additional support components to make a complete 3 digit
DPM/DVM. The small total component count, the low cost,
and high reliability allow for a wide variation in display appli-
cations, especially those previously utilizing APM's (Analog
Panel Meters).
The technology utilized in the AD2020 is Integrated Injection
Logic (I2L), an extension of the long proven, high yield bipolar
process. This technique offers a significantly higher circuit
packing density. The input amplifier, comparator, band-gap
reference, counters, clock, control logic, multiplexer and
drivers needed to implement the dual slope conversion, are all
included on a single die.
The AD2020, although it has an internal reference, consumes
only SOmW of power and is operated from a single +5V supply,
unlike most DPM chips requiring two (2) supplies.
The DPM chip is packaged in a standard size 16 pin-dual-in-line
package. Utilizing a unique double passivation and noble-metal
interconnect scheme, this plastic package offers essentially
hermetic performance over a wide temperature range. The chip
is available in two versions with differing guaranteed operating
temperature ranges. The standard AD2020 is specified from 0
to +7SoC and because of the special packaging technique, an
extended temperature version is also available upon request.
EXCELLENT PERFORMANCE
The AD2020 measures inputs from -99mV to +999mV with
an accuracy of 0.1% of reading:1:1 digit. The balanced differen-
tial input rejects common mode voltages up to 200mV dc,
enough to eliminate most ground loop problems. Polarity de-
tection is automatic and "+" and "-" Overload conditions are
indicated through BCD coding, i.e., BCD code for "+" Over-
load is 1011 and 1010 for "-" Overload. Zero shift is :!:0.5mV .
over the full operating temperature range resulting in the same
performance as a chip with Auto-Zero.
The benefits in manufacturing labor, inventory and reliability
are self-evident. The only external components required for a
complete digital display product are: 1 capacitor, 3 transistors,
1 decoder driver, 2 potentiometers and 3 displays, all operated
from a single 5 volt supply.
WHAT IS eL?
MOS and bipolar are the two basic LSI semiconductor proc-
esses. MOS produces very dense - therefore low-cost - logic
circuits, but has difficulty achieving precision analog circuitry.
Before 12L, bipolar could offer stable high-quality devices suit-
able for precision analog circuits, but logic consumed much
expensive chip area.
Integrated Injection Logic (12L) now allows the design of sin-
gle-chip devices containing both analog and digital functions,
without calling for the compromises required in the past. 12L
has a logic density that equals or exceeds that of MOS, while
employing a bipolar process suitable for precision analog
circuitry .
eL eliminates the complexity of conventional bipolar logic by
using inverted transistors (collectors and emitters are inter-
changed). Figure 1 shows a conventional transistor, with its
wraparound P+ isolation region, which is needed to separate
the collectors of adjacent transistors. When the transistors
are inverted, the collectors are automatically isolated, and the
emitters are grounded, at the same time.
.
-
AID CONVERTERS 403
--




 AD2020
.......
SPECIFICATIONS(@+25°C, Vcc= +5V)
PARAMETER
ACCURACY
Range
Accuracy
Unadjusted Gain
Unadjusted Zero Offset
Zero Width
Gain TemperatUre Coefficient
Offset TemperatUre Coefficient
Intercode Noise
ANALOG INPUT
Input Impedance
Bias Current
Common Mode
Voltage
Rejection Ratio
CONVERSION RATE
Normal
High Speed
CONTROL INPUT (PIN 6)
Normal Rate
Hold
High Speed
BCD OUTPUTS
Logic Low Sink Current
Logic High Leakage Current
DIGIT SELECT OUTPUTS
Digit "On" Sink Current
Digit "Off" Leakage Current
POWER SUPPLY
Operating Range
Supply Current
Power Supply Rejection
SPECIFICATIONS
MIN TYP
MAX
-99 +999
0.05 0.,1
0.94 1.0 1.06
-12 +12
1
SO
10.0
0.1
100
110
:1:0.2
SO
2 3.5 7
48 72 168
0.4V
0.8 1.6V
3.2
0.4 3.2
500
1.6 3.2
500
4.5 5.0 5.5
10.0 17.0
60
UNITS
mV
%RDG
mV
Count
ppm/oC
/JVfc
Counts
mn
nA
Vdc
dB
Conv.lsec
Conv.lsec
V
V
V
mA
pA
mA
pA
V
mA
dB
CONDITIONS
:tl Digit
Gain Pot @ 2.4kn
Zero Pot Centered
Gain Adjusted!
Offset Adjusted!
Hold Pin @ OV
Hold Pin ;;'3.2V
Pin May Be Left Open
Vo =";O.sV
=Vo 4.0V (open collector output)
=Vo 4.0V
=Vo 4.0V (open collector output)
VCC =S.OV
ABSOLUTE MAXIMUM RATINGS @ +2SoC'
Analog Input Voltage (pins 10 or 11 to pin 7) . . . . . . :l:lSV
Vcc toGND(pin 14topin7)
.+7V;-QV
Operating TemperatUre Range. . . . . . . . . . . . . . . . . . 0 to +7SoC
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . -55°C to + lS0oC
:Power Dissipation <'package) up to TA = +SSoC. . . . . 7S0mW
DeratesAbove+SS Cby
6.7mWfC
Lead TemperatUre. . . . . . . . . . . . . . . . . . . . . . . . . . . +26SoC for 10sec (max) at distance of 1116" :1:1132" from case to solder
OVERLOAD DECODING
Positive Overload: 1011 (decodes as "EEE" on display via 9374 decoder driver).
Negative Overload: 1010 (decodes as "- - -" on display via 9374 decoder driver).
Negative Indication: 1010 during MSD (decodes as "-88" on display via 9374 decoder driver).
I Unadjusted gain and zero result in additional T.C. of 3.3jJ.vfc
. Beyond which damage may occur.
Specifications subject to cbange without norice.
per unadjusted bit.
PIN CONFIGURA nON
TOP VIEW
AI (BCD DATA)
Ao (BCD DATA)
NSO
MSD
LSD
HOLD
GROUND
ZERO POT
1
2
3
4
5
6
7
8
16 AJ (BCD DATA)
15 A2 (BCD DATA)
14 +5 VOLTS
13 GAIN POT
12 INTEGRATING CAP
11 HIGH INPUT
10 LOW INPUT
9 ZERO POT
OUTLINE DIMENSIONS
Dimensionsshown in inches and (mm).
. .0.74508.92'
I 0.78509.931
I
[~~::]5=0.325 (8251
0.300 (7.621
1
O.O5O(1.27'
.200 IS.081
0.15513.941
L ~0.04511.14' .5013.811
A -~"t15°
::~::~: ~~ j L h0.065(1.651
J l~ 0.100rv.
l +-,25(3.171
--I
O.OZO10.511
(2.541
0.014 (0.351
404 A/D CONVERTERS
--- ---




 AD2020
HOLD, NORMAL, HIGH SPEED CONVERSIONS
Hold, nonnal and high speed conversion rates are controlled
via voltage levels applied to the Hold pin (pin 6) of the
AD2020. The circuit in Figure 7 shows how the three condi-
tions are controlled by a single pin.
PIN6
gate 1 totum on but gate 2 will remain off. In this state
the AD2020 will "hold" the last valid conversion.
High Speed
A voltage greater than 3.2V will cause both gates to turn
on allowing the AD2020 to convert at its maximum rate.
Logic Compatibility
A typical circuit for making the AD2020 hold function logic
compatible is shown in Figure 8. A Logic "I" applied to the
base of the transistor will allow normal operation. A Logic "0"
will cause the AD2020 to "hold".
Figure 7.
Nonnal Conversion
A voltage less than 0.4V (or an open circuit) will keep
both gate 1 and gate 2 off. The AD2020 in this state
will convert at its nonnal rate.
Hold
A voltage greater than 0.8V but less than 1.6V will cause
+6V
561<11
TO PIN 6
Figure 8.
j
"3RD GENERATION 12L"
THE AD2026
The AD2026 was specifically designed
to provide a digital alternative to ana-
log panel meters. The complete DPM is
mounted on a single 3" by 1 S18" PCB.
A unique case design utilizes molded-
in fingers, both to capture the PCB and
to provide snap-in mounting of the
DPM in a standard panel cutout. No
mounting hardware of any kind is used.
The DPM occupies less than 1" of space
behind the panel. Only 13 components
(including 3 decimal point resistors) in
addition to the AD2020 make up the
AD2026. Reliability is assured by the
low component count, low internal
heat rise (S°C), and extensive factory
testing. MTBF is 260,000 hours at
+2SoC (for further infonnation on the
AD2026 consult factory).
THE AD2023
The AD2023 is a 3 digit DPM module
containing all the circuitry, except gain
adjust pot, to drive three external dis-
play digits. The AD2023 with 7-seg-
ment output and the AD2023/B, with
character serial BCD outpUt, enables
the user to drive most any type of dis-
play. Like the AD2026, the AD2023
is based on the AD2020. Packaged in a
small 2" x 2" x 0.4" module and requir-
ing only +SV power, the AD2023 and
AD2023/B address DPM needs where
available front panel space is limited.
Optional operating temperature ex-
tremes of -400C and +100°C and stor-
age temperatures of -s SOCand +12SoC
allow the user to apply the AD2023 in
environments where conventional
DPM's cannot be used.
AD2020
Completing the "Third Generation 12L
Family", Analog Devices now makes
the AD2020 available to the market.
Requiring only 10 support compo-
nents, the AD2020 is the most com-
plete DPM Chip available today. High
reliability and perfonnance are proven
by success of the AD2026, introduced
in November 1976.
406 AID CONVERTERS
.....
---
----



Recommended third-party AD2020 Datasheet






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