A/D Converter. NTE2050 Datasheet

NTE2050 Converter. Datasheet pdf. Equivalent

Part NTE2050
Description Integrated Circuit 31/2-Digit Single Chip A/D Converter
Feature NTE2050 & NTE2051 Integrated Circuit 31/2–Digit Single Chip A/D Converter Description: The NTE2050 a.
Manufacture NTE
Datasheet
Download NTE2050 Datasheet



NTE2050
NTE2050 & NTE2051
Integrated Circuit
31/2–Digit Single Chip A/D Converter
Description:
The NTE2050 and NTE2051 are high performance, low power 3–1/2 digit A/D converters containing
all the necessary active devices on a single CMOS IC. Included are seven segment decoders, display
drivers, reference and a clock. The NTE2051 is designed to interface with a liquid crystal display
(LCD) and includes a backplane drive; the NTE2050 will directly drive an instrument–size light emit-
ting diode (LED) display.
The NTE2050 and NTE2051 bring together an unprecedented combination of high accuracy, versatil-
ity, and true economy. High accuracy like auto–zero to less than 10µV, zero drift of less than 1µV/°C,
input bias current of 10pA max., and roll–over error of less than one count. The versatility of true differ-
ential input and reference is useful in all systems, but gives the designer an uncommon advantage
when measuring load cells, strain gauges and other bridge–type transducers. And, finally, the true
economy of single power supply operation (NTE2051), enabling a high performance panel meter to
be built with the addition of only 7 passive components and a display.
Features:
D Guaranteed Zero Reading for 0 Volts Input on all Scales
D True Polarity at Zero for Precise Null Detection
D Input Current: 1pA Typ
D True Differential Input and Reference
D Direct Display Drive – No External Components Required:
NTE2050 (LED)
NTE2051 (LCD)
D Low Noise – Less than 15µVP–P
D On–Chip Clock and Reference
D Low Power Dissipation – Typically Less than 10mW
D No Additional Active Circuits Required



NTE2050
Absolute Maximum Ratings:
Supply Voltage,
NTE2051, V+ to V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
NTE2050, V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6V
NTE2050, Vto GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V
Analog Input Voltage (Either Input, Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V
Reference Input Voltage (Either Input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V
Clock Input,
NTE2051 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TEST to V+
NTE2050 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V+
Power Dissipation (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW
Operating Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65° to +160°C
Lead Temperature (During Soldering, 60sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Note 1. Stresses above those listed under Absolute Maximum Ratingsmay cause permanent
damage to the device. These are stress ratings only, and functional operation of the device
at these or another conditions above those indicated in the operational section of the specifi-
cation is not implied. Exposure to absolute maximum rating conditions for extended periods
may affect device reliability.
Note 2. Input voltages may exceed the supply voltages provided the input current is limited to ±100µA.
Note 3. Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
Electrical Characteristics: (TA = +25°C, fclock = 48kHz unless otherwise specified)
Parameter
Test Conditions
Min Typ Max
Unit
Zero Input Reading
VIN = 0V
Full Scale = 200mV
000.0 ±000.0 +000.0 Digital Reading
Ratiometric Reading
VIN = VREF
VREF = 100mV
Rollover Error (Difference in VIN = +VIN ] 200mV
Reading for Equal Positive and
Negative Reading near Full
Scale)
999 999/1000 1000 Digital Reading
1 ±.2 +1
Counts
Linearity (Maximum Deviation Full Scale = 200mV
from Best Straight Line Fit) or Full Scale = 2V
1 ±.2 +1
Counts
Common Mode Rejection Ratio VCM = ±1V, VIN = 0V 50
Full Scale = 200mV
µV/V
Noise (PeakPeak Value not
Exceeded 95% of Time)
VIN = 0V
Full Scale = 200mV
15
µV
Leakage Current | Input
Zero Reading Drift
Scale Factor Temperature
Coefficient
VIN = 0
VIN = 0, 0° < TA < +70°C
VIN = 199.0mV
0° < TA < +70°C
(Ext. Ref. 0ppm/°C)
1 10
0.2 1.0
15
pA
µV/°C
ppm/°C
V+ Supply Current (Does Not
Include LED Current for
NTE2050)
VIN = 0
0.8 1.8
mA
VSupply Current (NTE2050 Only)
0.6 1.8
mA







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