ADC1241CMJ 반도체 회로 부품 판매점
Self-Calibrating 12-Bit Plus Sign mP-Compatible A/D Converter with Sample-and-Hold
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 National Semiconductor |
November 1994
ADC1241 Self-Calibrating 12-Bit Plus
Sign mP-Compatible A D Converter
with Sample-and-Hold
General Description
The ADC1241 is a CMOS 12-bit plus sign successive ap-
proximation analog-to-digital converter On request the
ADC1241 goes through a self-calibration cycle that adjusts
positive linearity and full-scale errors to less than g LSB
each and zero error to less than g1 LSB The ADC1241
also has the ability to go through an Auto-Zero cycle that
corrects the zero error during every conversion
The analog input to the ADC1241 is tracked and held by the
internal circuitry and therefore does not require an external
sample-and-hold A unipolar analog input voltage range (0V
to a5V) or a bipolar range (b5V to a5V) can be accom-
modated with g5V supplies
The 13-bit word on the outputs of the ADC1241 gives a 2’s
complement representation of negative numbers The digi-
tal inputs and outputs are compatible with TTL or CMOS
logic levels
Applications
Y Digital Signal Processing
Y High Resolution Process Control
Y Instrumentation
Key Specifications
Y Resolution
Y Conversion Time
Y Linearity Error
g
Y Zero Error
Y Positive Full Scale Error
Y Power Consumption
12 Bits plus Sign
13 8ms (max)
LSB (g0 0122%) (max)
g1LSB (max)
g1LSB (max)
70mW (max)
Features
Y Self-calibrating
Y Internal sample-and-hold
Y Bipolar input range with g5V supplies and single
a5V reference
Y No missing codes over temperature
Y TTL MOS input output compatible
Y Standard 28-pin DIP
TRI-STATE is a registered trademark of National Semiconductor Corporation
Simplified Schematic
Connection Diagram
Dual-In-Line Package
C1995 National Semiconductor Corporation TL H 10554
Top View
TL H 10554 – 2
Order Number ADC1241CMJ
ADC1241CMJ 883 ADC1241BIJ or
ADC1241CIJ
See NS Package Number J28A
TL H 10554 – 1
RRD-B30M115 Printed in U S A
Absolute Maximum Ratings (Notes 1 2)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (VCC e DVCC e AVCC)
Negative Supply Voltage (Vb)
6 5V
b6 5V
Voltage at Logic Control Inputs
b0 3V to (VCC a 0 3V)
Voltage at Analog Input (VIN) (Vb b0 3V) to (VCC a 0 3V)
AVCC-DVCC (Note 7)
0 3V
Input Current at any Pin (Note 3)
g5 mA
Package Input Current (Note 3)
g20 mA
Power Dissipation at 25 C (Note 4)
875 mW
Storage Temperature Range
b65 C to a150 C
ESD Susceptability (Note 5)
2000V
Soldering Information
J Package (10 sec)
300 C
Operating Ratings (Notes 1 2)
Temperature Range
TMINsTAsTMAX
ADC1241BIJ ADC1241CIJ
b40 CsTAsa85 C
ADC1241CMJ ADC1241CMJ 883 b55 CsTAsa125 C
DVCC and AVCC Voltage
(Notes 6 7)
4 5V to 5 5V
Negative Supply Voltage (Vb)
b4 5V to b5 5V
Reference Voltage
(VREF Notes 6 7)
3 5V to AVCC a 50 mV
Converter Electrical Characteristics
The following specifications apply for VCC e DVCC e AVCC e a5 0V Vb e b5 0V VREF e a5 0V and fCLK e 2 0 MHz
unless otherwise specified Boldface limits apply for TA e TJ e TMIN to TMAX all other limits TA e TJ e 25 C (Notes 6 7
and 8)
Symbol
Parameter
Conditions
STATIC CHARACTERISTICS
Positive Integral
Linearity Error
Negative Integral
Linearity Error
Differential Linearity
ADC1241BIJ
ADC1241CMJ CIJ
ADC1241BIJ
ADC1241CMJ CIJ
After Auto-Cal
(Notes 11 12)
After Auto-Cal
(Notes 11 12)
After Auto-Cal (Notes 11
12)
Typical
Limit
Units
(Note 9) (Notes 10 18) (Limit)
g LSB(max)
g1 LSB max
g1 LSB(max)
g1 LSB(max)
12 Bits(min)
CREF
CIN
VIN
Zero Error
Positive Full-Scale Error
Negative Full-Scale Error
VREF Input Capacitance
Analog Input Capacitance
Analog Input Voltage
After Auto-Zero or Auto-Cal
(Notes 12 13)
After Auto-Cal (Note 12)
After Auto-Cal (Note 12)
g
80
65
Power Supply
Sensitivity
Zero Error (Note 14) AVCC e DVCC e 5V g5%
Full-Scale Error VREF e 4 75V Vb e b5V g5%
Linearity Error
DYNAMIC CHARACTERISTICS
S (NaD) Unipolar Signal-to-NoiseaDistortion
Ratio (Note 17)
S (NaD) Bipolar Signal-to-NoiseaDistortion
Ratio (Note 17)
Unipolar Full Power Bandwidth (Note 17)
Bipolar Full Power Bandwidth (Note 17)
tAp Aperture Time
Aperture Jitter
fIN e 1 kHz VIN e 4 85 Vp-p
fIN e 10 kHz VIN e 4 85 Vp-p
fIN e 1 kHz VIN e g4 85 Vp-p
fIN e 10 kHz VIN e g4 85 Vp-p
VIN e 0V to 4 85V
VIN e g4 85 Vp-p
g
g
g
72
72
76
76
32
25
100
100
g1 LSB(max)
g1 LSB(max)
g1 g2 LSB(max)
pF
pF
Vb b 0 05 V(min)
VCC a 0 05 V(max)
LSB
LSB
LSB
dB
dB
dB
dB
kHz
kHz
ns
psrms
2
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ADC1241CMJ
Self-Calibrating 12-Bit Plus Sign mP-Compatible A/D Converter with Sample-and-Hold - National Semiconductor
