Datasheet
MCP3903
DS25048B-page 6 © 2011 Microchip Technology Inc.
1.2 SERIAL INTERFACE CHARACTERISTICS
SERIAL INTERFACE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all parameters apply at AV
DD
= 4.5 to 5.5V,
DV
DD
= 2.7 to 3.6V, -40°C < T
A
<+125°C, C
LOAD
= 30 pF.
Parameters Sym Min Typ Max Units Conditions
Serial Clock frequency f
SCK
—— 10MHz2.7 ≤ DV
DD
< 3.6
CS
setup time t
CSS
50 — — ns 2.7 ≤ DV
DD
< 3.6
CS
hold time
t
CSH
100 — — ns 2.7 ≤ DV
DD
< 3.6
CS
disable time t
CSD
50 — — ns —
Data setup time t
SU
10 — — ns 2.7 ≤ DV
DD
< 3.6
Data hold time t
HD
20 — — ns 2.7 ≤ DV
DD
< 3.6
Serial Clock high time t
HI
40 — — ns 2.7 ≤ DV
DD
< 3.6
Serial Clock low time t
LO
40 — — ns 2.7 ≤ DV
DD
< 3.6
Serial Clock delay time t
CLD
50 — — ns —
Serial Clock enable time t
CLE
50 — — ns —
Output valid from SCK low t
DO
— — 50 ns 2.7 ≤ DV
DD
< 3.6
Output hold time t
HO
0——ns
Output disable time t
DIS
— — 50 ns 2.7 ≤ DV
DD
< 3.6
Reset Pulse Width (RESET
)t
MCLR
100 — — ns 2.7 ≤ DV
DD
< 3.6
Data Transfer Time to DR
(Data Ready) t
DODR
—50ns2.7 ≤ DV
DD
< 3.6
Data Ready Pulse Low Time t
DRP
1/
DMCLK
—µs2.7 ≤ DV
DD
< 3.6
Schmitt Trigger High-level Input voltage
(All digital inputs)
V
IH1
.7 DV
DD
—DV
DD
+1 V
Schmitt Trigger Low-level input voltage
(All digital inputs)
V
IL1
-0.3 — 0.25
DV
DD
V
Hysteresis of Schmitt Trigger Inputs
(All digital inputs)
V
HYS
50 — mV
Low-level output voltage, SDO pin V
OL
— — 0.4 V SDO pin only, I
OL
= 2 mA,
DV
DD
= 3.3V
Low-level output voltage, DRn
pins V
OL
0.4 V DRn pins only,
I
OL
= +1.5 mA, DV
DD
=3.3V
High-level output voltage, SDO pin V
OH
DV
DD
-
0.5
— — V SDO pin only,
I
OH
= -2 mA, DV
DD
= 3.3V
High-level output voltage, DRn
pins
only
V
OH
DV
DD
-
0.5
——VDRn pins only,
I
OH
= -1.5 mA, DV
DD
=3.3V
Input leakage current I
LI
— — ±1 µA CS = DV
DD
, Inputs tied to
DV
DD
OR DGND
Output leakage current I
LO
— — ±1 µA CS = DV
DD
, Inputs tied to
DV
DD
OR DGND
Internal capacitance (all inputs and
outputs)
C
INT
—— 7 pFT
A
= 25°C, SCK = 1.0 MHz
DV
DD
= 3.3V (Note 1)
Note 1: This parameter is periodically sampled and not 100% tested.