MCP3421 Microchip Technology, MCP3421 Datasheet - Page 2

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

MCP3421
1.0
Absolute Maximum Ratings†
V
All inputs and outputs w.r.t V
Differential Input Voltage ...................................... |V
Output Short Circuit Current .................................Continuous
Current at Input Pins ....................................................±2 mA
Current at Output and Supply Pins ............................±10 mA
Storage Temperature.....................................-65°C to +150°C
Ambient Temp. with power applied ...............-55°C to +125°C
ESD protection on all pins ................ ≥ 6 kV HBM, ≥ 400V MM
Maximum Junction Temperature (T
ELECTRICAL CHARACTERISTICS
DS22003B-page 2
Electrical Specifications: Unless otherwise specified, all parameters apply for T
V
Analog Inputs
Differential Input Range
Common-Mode Voltage Range
(absolute)
Differential Input Impedance
(Note 2)
Common Mode input
Impedance
System Performance
Resolution and No Missing
Codes
Data Rate
Output Noise
Note 1:
DD
IN
...................................................................................7.0V
+ = V
2:
3:
4:
5:
6:
7:
8:
(Note 8)
IN
ELECTRICAL
CHARACTERISTICS
Parameters
- = V
(Note 1)
(Note 3)
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
/2. All ppm units use 2*V
SS
............... –0.3V to V
J
) . .........................+150°C
Z
Z
Sym
IND
INC
DR
(f)
(f)
REF
V
as full-scale range.
SS
2.75
176
Min
12
14
16
18
44
—
—
—
11
—
-0.3
DD
DD
+0.3V
- V
REF
SS
±2.048/PGA
2.25/PGA
|
.
3.75
240
Typ
1.5
25
60
15
—
—
—
—
—
†Notice: Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability
V
DD
20.5
Max
328
5.1
82
—
—
—
—
—
—
—
—
+0.3
A
= -40°C to +85°C, V
µV
Units
SPS
SPS
SPS
SPS
Bits
Bits
Bits
Bits
MΩ
MΩ
V
V
RMS
.
© 2006 Microchip Technology Inc.
V
During normal mode operation
PGA = 1, 2, 4, 8
DR = 240 SPS
DR = 60 SPS
DR = 15 SPS
DR = 3.75 SPS
S1,S0 = ‘00’, (12 bits mode)
S1,S0 = ‘01’, (14 bits mode)
S1,S0 = ‘10’, (16 bits mode)
S1,S0 = ‘11’, (18 bits mode)
T
PGA = 1, V
A
IN
= 25°C, DR = 3.75 SPS,
= V
DD
= +5.0V, V
IN
+ - V
IN
= 0
IN
Conditions
-
SS
= 0V,