MCP3421 Microchip Technology, MCP3421 Datasheet - Page 3

• Manufacturer Part Number: MCP3421
• Description: 18-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference
• Manufacturer: Microchip Technology

ELECTRICAL CHARACTERISTICS (CONTINUED)
© 2006 Microchip Technology Inc.
Electrical Specifications: Unless otherwise specified, all parameters apply for T
V
Integral Nonlinearity
Internal Reference Voltage
Gain Error
PGA Gain Error Match
Gain Error Drift
Offset Error
Offset Drift vs. Temperature
Common-Mode Rejection
Gain vs. V
Power Supply Rejection at DC
Power Requirements
Voltage Range
Supply Current during
Conversion
Supply Current during Standby
Mode
I
High level input voltage
Low level input voltage
Low level output voltage
Hysteresis of Schmitt Trigger
for inputs
Supply Current when I
line is active
Input Leakage Current
Pin Capacitance and I
Pin capacitance
I
Thermal Characteristics
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Note 1:
2
2
IN
C Digital Inputs and Digital Outputs
C Bus Capacitance
+ = V
2:
3:
4:
5:
6:
7:
8:
IN
Parameters
(Note 7)
DD
- = V
(Note 5)
Any input voltage below or greater than this voltage causes leakage current through the ESD diodes at the input pins.
This parameter is ensured by characterization and not 100% tested.
This input impedance is due to 3.2 pF internal input sampling capacitor.
The total conversion speed includes auto-calibration of offset and gain.
INL is the difference between the endpoints line and the measured code at the center of the quantization band.
Includes all errors from on-board PGA and V
Full Scale Range (FSR) = 2 x 2.048/PGA = 4.096/PGA.
This parameter is ensured by characterization and not 100% tested.
This parameter is ensured by design and not 100% tested.
REF
(Note 5)
/2. All ppm units use 2*V
(Note 4)
2
(Note 5)
2
C bus
C Bus Capacitance
V
V
Sym
I
I
I
C
V
V
V
INL
I
DDA
DDS
V
V
HYST
DDB
I
C
T
T
T
REF
ILH
ILL
PIN
OS
DD
OL
IH
IL
A
A
A
b
REF
0.05V
0.7 V
as full-scale range.
Min
2.7
-40
-40
-65
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
-1
DD
DD
REF
.
2.048
0.05
105
100
155
145
110
Typ
0.1
0.1
10
15
50
—
—
—
—
—
—
—
—
—
—
—
—
—
5
5
0.3V
+125
+150
0.35
V
Max
190
400
+85
5.5
0.5
0.4
35
40
40
10
10
—
—
—
—
—
—
—
—
—
—
DD
1
DD
A
= -40°C to +85°C, V
ppm of
ppm/°C
ppm/V
nV/°C
Units
FSR
µV
dB
dB
dB
µA
µA
µA
µA
µA
µA
pF
pF
°C
°C
°C
%
%
V
V
V
V
V
V
DR = 3.75 SPS
(Note 6)
PGA = 1, DR = 3.75 SPS
Between any 2 PGA gains
PGA=1, DR=3.75 SPS
Tested at PGA = 1
V
V
at DC and PGA =1,
at DC and PGA =8,
T
T
PGA = 1
T
PGA = 1
V
V
I
f
V
V
OL
SCL
A
A
A
DD
DD
DD
DD
IH
IL
= +25°C
= +25°C, V
= +25°C, V
= 3 mA, V
= GND
= 5.5V
DD
= 5.0V
= 5.0V and DR = 3.75 SPS
= 5.0V
= 3.0V
= 100 kHz
MCP3421
= +5.0V, V
DD
DD
DD
Conditions
DS22003B-page 3
= +5.0V
= 2.7V to 5.5V,
= 2.7V to 5.5V,
SS
= 0V,