
NTE2053
Integrated Circuit
8–Bit MPU Compatible A/D Converter
Description:
The NTE2053 is a CMOS 8–bit successive approximation Analog to Digital converter in a 20–Lead DIP
type package which uses a differential potentiometric ladder – similar to the 256R products. This device
is designed to allow operation with the NSC800 and INS8080A derivative control bus, and TRI–STATE
output latches directly drive the data bus. These A/Ds appear like memory locations or I/O ports to the
microprocessor and no interfacing logic is needed.
A new differential analog voltage input allows increasing the common–mode rejection and offsetting
the analog zero input voltage value. In addition, the voltage reference input can be adjusted to allow
encoding any similar analog voltage span to the full 8 bits of resolution.
Features:
Compatible With 8080 MPU Derivatives – No Interfacing Logic Needed – Access Time: 135ns
Easy Interface to all Microprocessors, or Operates “Stand Alone”
Differential Analog Voltage Inputs
Logic Inputs and Outputs Meet Both MOS and TTL Voltage Level Specifications
Works With 2.5V (NTE952) Voltage Reference
On–Chip Clock Generator
0V to 5V Analog Input Voltage Range with Single 5V Supply
No Zero Adjust Required
Operates Ratiometrically or with 5V, 2.5V, or Analog Span Adjusts Voltage Reference
Absolute Maximum Ratings:
(Note 1, Note 2)
Supply Voltage (Note 3), V
CC
Voltage at Logic Control Inputs
Voltage at All Other Inputs and Outputs
Storage Temperature Range, T
stg
Power Dissipation (T
A
= +25
°
C), P
D
Lead Temperature (During Soldering, 10sec), T
L
6.5V
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–0.3V to +18V
–0.3V to V
CC
+0.3V
–65
°
to +150
°
C
875mW
+300
°
C
Recommended Operating Conditions:
(Note 1, Note 2)
Operating Temperature Range, T
A
Supply Voltage Range, V
CC
Note 1. Absolute Maximum Ratings are those values beyond which the life of the device may be im-
paired.
Note 2. All voltage are measured with respect to GND, unless otherwise specified. The separate
A GND point should always be wired to the D GND.
Note 3. A zener diode exists, internally, from V
CC
to GND and has a typical breakdown voltage of 7V.
0
°
to +70
°
C
4.5V to 6.3V
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