ADC1251
器件描述：Self-Calibrating 12-Bit Plus Sign A/D Converter with Sample-and-Hold
器件厂商：NSC [National Semiconductor]
文件大小：301.07KB，共16页
Sponsor by e络盟器件资料摘要：
TL/H/11024
ADC1251
Self-Calibrating
12-Bit
Plus
Sign
A/D
Converter
with
Sample-and-Hold
December 1994
ADC1251 Self-Calibrating 12-Bit Plus Sign
A/D Converter with Sample-and-Hold
General Description
The ADC1251 is a CMOS 12-bit plus sign successive ap-
proximation analog-to-digital converter. On request, the
ADC1251 goes through a self-calibration cycle that adjusts
for any zero, full scale, or linearity errors. The ADC1251 also
has the ability to go through an Auto-Zero cycle that cor-
rects the zero error during every conversion.
The analog input to the ADC1251 is tracked and held by the
internal circuitry, so an external sample-and-hold is not re-
quired. The ADC1251 has an S/H control input which direct-
ly controls the track-and-hold state of the A/D. A unipolar
analog input voltage range (0 to a5V) or a bipolar range
(b5V to a5V) can be accommodated with g5V supplies.
The 13-bit data result is available on the eight outputs of the
ADC1251 in two bytes, high-byte first and sign extended.
The digital inputs and outputs are compatible with TTL or
CMOS logic levels.
Features
Y
Self-calibration provides excellent temperature stability
Y
Internal sample-and-hold
Y
8-bit mP/DSP interface
Y
Bipolar input range with a single a5V reference
Y
No missing codes over temperature
Y
TTL/MOS input/output compatible
Key Specifications
Y
Resolution 12 bits plus sign
Y
Conversion Time 8 ms (max)
Y
Sampling Rate 83 kHz (max)
Y
Linearity Error g0.6 LSB (g0.0146%) (max)
Y
Zero Error g1 LSB (max)
Y
Full Scale Error g1.5 LSB (max)
Y
Power Consumption
@
g5V 113 mW (max)
Applications
Y
Digital signal processing
Y
High resolution process control
Y
Instrumentation
Simplified Block Diagram
TL/H/11024–1
Connection Diagram
Dual-In-Line Package
TL/H/11024–2
Top View
Ordering Information
Industrial
Package
(b40§C
s
T
A
s a
85§C)
ADC1251BIJ,
J24A
ADC1251CIJ
Military
Package
(b55§C
s
T
A
s a
125§C)
ADC1251CMJ, J24A
ADC1251CMJ/883
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
ADC1251
Self-Calibrating
12-Bit
Plus
Sign
A/D
Converter
with
Sample-and-Hold
December 1994
ADC1251 Self-Calibrating 12-Bit Plus Sign
A/D Converter with Sample-and-Hold
General Description
The ADC1251 is a CMOS 12-bit plus sign successive ap-
proximation analog-to-digital converter. On request, the
ADC1251 goes through a self-calibration cycle that adjusts
for any zero, full scale, or linearity errors. The ADC1251 also
has the ability to go through an Auto-Zero cycle that cor-
rects the zero error during every conversion.
The analog input to the ADC1251 is tracked and held by the
internal circuitry, so an external sample-and-hold is not re-
quired. The ADC1251 has an S/H control input which direct-
ly controls the track-and-hold state of the A/D. A unipolar
analog input voltage range (0 to a5V) or a bipolar range
(b5V to a5V) can be accommodated with g5V supplies.
The 13-bit data result is available on the eight outputs of the
ADC1251 in two bytes, high-byte first and sign extended.
The digital inputs and outputs are compatible with TTL or
CMOS logic levels.
Features
Y
Self-calibration provides excellent temperature stability
Y
Internal sample-and-hold
Y
8-bit mP/DSP interface
Y
Bipolar input range with a single a5V reference
Y
No missing codes over temperature
Y
TTL/MOS input/output compatible
Key Specifications
Y
Resolution 12 bits plus sign
Y
Conversion Time 8 ms (max)
Y
Sampling Rate 83 kHz (max)
Y
Linearity Error g0.6 LSB (g0.0146%) (max)
Y
Zero Error g1 LSB (max)
Y
Full Scale Error g1.5 LSB (max)
Y
Power Consumption
@
g5V 113 mW (max)
Applications
Y
Digital signal processing
Y
High resolution process control
Y
Instrumentation
Simplified Block Diagram
TL/H/11024–1
Connection Diagram
Dual-In-Line Package
TL/H/11024–2
Top View
Ordering Information
Industrial
Package
(b40§C
s
T
A
s a
85§C)
ADC1251BIJ,
J24A
ADC1251CIJ
Military
Package
(b55§C
s
T
A
s a
125§C)
ADC1251CMJ, J24A
ADC1251CMJ/883
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.