Datasheet

MCP3421
DS22003E-page 4 © 2009 Microchip Technology Inc.
Gain Error (Note 5) — 0.05 0.35 % PGA = 1, DR = 3.75 SPS
PGA Gain Error Match (Note 5) — 0.1 — % Between any 2 PGA gains
Gain Error Drift (Note 5) — 15 — ppm/°C PGA=1, DR=3.75 SPS
Offset Error V
OS
— 15 40 µV Tested at PGA = 1
V
DD
= 5.0V and DR = 3.75 SPS
Offset Drift vs. Temperature — 50 — nV/°C V
DD
= 5.0V
Common-Mode Rejection — 105 — dB at DC and PGA =1,
— 110 — dB at DC and PGA =8,
T
A
= +25°C
Gain vs. V
DD
— 5 — ppm/V T
A
= +25°C, V
DD
= 2.7V to 5.5V,
PGA = 1
Power Supply Rejection at DC — 100 — dB T
A
= +25°C, V
DD
= 2.7V to 5.5V,
PGA = 1
Power Requirements
Voltage Range V
DD
2.7 — 5.5 V
Supply Current during
Conversion
I
DDA
— 155 190 µA V
DD
= 5.0V
— 145 — µA V
DD
= 3.0V
Supply Current during Standby
Mode
I
DDS
—0.1 0.5µA
I
2
C Digital Inputs and Digital Outputs
High level input voltage V
IH
0.7 V
DD
—V
DD
V
Low level input voltage V
IL
— — 0.3V
DD
V
Low level output voltage V
OL
—— 0.4VI
OL
= 3 mA, V
DD
= +5.0V
Hysteresis of Schmitt Trigger
for inputs (Note 7)
V
HYST
0.05V
DD
——Vf
SCL
= 100 kHz
Supply Current when I
2
C bus
line is active
I
DDB
—— 10µA
Input Leakage Current I
ILH
—— 1 µAV
IH
= 5.5V
I
ILL
-1 — — µA V
IL
= GND
Pin Capacitance and I
2
C Bus Capacitance
Pin capacitance C
PIN
— — 10 pF
I
2
C Bus Capacitance C
b
— — 400 pF
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise specified, all parameters apply for T
A
= -40°C to +85°C, V
DD
= +5.0V, V
SS
= 0V,
V
IN
+ = V
IN
- = V
REF
/2. All ppm units use 2*V
REF
as full scale range.
Parameters Sym Min Typ Max Units Conditions
Note 1: 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.
2: This input impedance is due to 3.2 pF internal input sampling capacitor.
3: The total conversion speed includes auto-calibration of offset and gain.
4: INL is the difference between the endpoints line and the measured code at the center of the quantization band.
5: Includes all errors from on-board PGA and V
REF
.
6: Full Scale Range (FSR) = 2 x 2.048/PGA = 4.096/PGA.
7: This parameter is ensured by characterization and not 100% tested.
8: This parameter is ensured by design and not 100% tested.