NTE2054 NTE Electronics, Inc., NTE2054 Datasheet

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NTE2054

Manufacturer Part Number
NTE2054
Description
NTE2054, Integrated Circuit A/D Converter For 3 Digit Display
Manufacturer
NTE Electronics, Inc.
Datasheet
Description:
The NTE2054 is an I
provides a 3–digit multiplexed BCD output. This device, when used with an NTE2032 BCD–to–
Seven–Segment Decoder/Driver and a minimum of external parts, implements a complete 3–digit
display.
Features:
D Dual–Slope A/D Conversion
D Multiplexed BCD Display
D Ultra–Stable Internal Band–Gap Voltage Reference
D Capable of Reading 99mV below GND with a Single Supply
D Differential Input
D Internal Timing – No External Clock Required
D Choice of Low–Speed (4Hz) or High–Speed (96Hz) Conversion Rate
D “Hold” Inhibits Conversion but Maintains Delay
Absolute Maximum Ratings:
DC Supply Voltage (between Pin7 and Pin14), V+
Input Voltage (Pin10 or Pin11 to GND), V
Device Dissipation (Up to T
Operating Temperature Range, T
Storage Temperature Range, T
Lead Temperature, T
Derate Linearly Above T
(During Soldering, 1/16 1/32 in. (1.59 0.79mm) from case for 10sec Max)
2
L
L monolithic Analog to Digital converter in a 16–Lead DIP type package that
A/D Converter for 3–Digit Display
A
= +55 C), P
A
stg
= +55 C
A
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Circuit
D
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE2054
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65 to +150 C
. . . . . .
0 to +75 C
7.9mW/ C
750mW
+265 C
+7V
15V

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NTE2054 Summary of contents

Page 1

... A/D Converter for 3–Digit Display Description: 2 The NTE2054 monolithic Analog to Digital converter in a 16–Lead DIP type package that provides a 3–digit multiplexed BCD output. This device, when used with an NTE2032 BCD–to– Seven–Segment Decoder/Driver and a minimum of external parts, implements a complete 3–digit display ...

Page 2

... Circuit Description: The heart of the NTE2054 is the V/I converter and reference–current generator. The V/I converter converts the input voltage applied between Pin10 and Pin11 to a current that charges the integrating capacitor on Pin12 for a predetermined time interval. At the end of the charging interval, the V/I con- verter is disconnected from the integrated capacitor, and a band– ...

Page 3

... Pin6 provides a low–speed (4Hz) sampling rate. When Pin6 is fixed at +1.2V (by placing a 12k resistor between Pin6 and the +5V supply) a “hold” feature is available. While the NTE2054 is in the hold mode, sampling continues at 4Hz but the display data are latched to the last reading prior to the ap- plication of the 1 ...

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