
MCP3901
DS22192D-page 6
2011 Microchip Technology Inc.
SERIAL INTERFACE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all parameters apply: AVDD = 4.5 to 5.5V, DVDD = 2.7 to 5.5V,
-40°C < TA < +85°C, CLOAD = 30 pF
Parameters
Sym
Min
Typ
Max
Units
Conditions
Serial Clock Frequency
fSCK
—
20
10
MHz
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD < 5.5
CS Setup Time
tCSS
25
50
—
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD ≤ 5.5
CS Hold Time
tCSH
50
100
—
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD < 5.5
CS Disable Time
tCSD
50
—
ns
Data Setup Time
tSU
5
10
—
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD < 5.5
Data Hold Time
t
HD
10
20
—
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD < 5.5
Serial Clock High Time
t
HI
20
50
—
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD < 5.5
Serial Clock Low Time
t
LO
20
50
—
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
DD < 5.5
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 < 5.5
Modulator Output Valid from AMCLK
High
t
DOMDAT
—
1/2 * AMCLK
s
Output Hold Time
t
HO
0—
—
ns
Output Disable Time
t
DIS
—
25
50
ns
4.5
≤ DV
DD ≤ 5.5
2.7
≤ DV
Reset Pulse Width (RESET)tMCLR
100
—
ns
2.7
≤ DV
DD < 5.5
Data Transfer Time to DR (data ready)
tDODR
—
50
ns
2.7
≤ DV
DD < 5.5
Data Ready Pulse Low Time
tDRP
—1/DMCLK
—
s
2.7
≤ DV
DD < 5.5
Schmitt Trigger High-Level Input Voltage
VIH1
.7 DVDD
—DVDD + 1
V
Schmitt Trigger Low-Level Input Voltage
VIL1
-0.3
—
0.2 DVDD
V
Hysteresis of Schmitt Trigger Inputs
(all digital inputs)
VHYS
300
—
mV
Low-Level Output Voltage, SDO Pin
VOL
—
0.4
V
SDO pin only,
IOL = +2.0 mA, VDD = 5.0V
Low-level output voltage, DR and
MDAT Pins
VOL
——
0.4
V
DR and MDAT pins only,
IOL = +800 mA, VDD = 5.0V
High-level output voltage, SDO pin
VOH
DVDD – 0.5
—
V
SDO pin only,
IOH = -2.0 mA, VDD = 5.0V
High-level output voltage, DR and
MDAT pins
VOH
DVDD – 0.5
—
V
DR and MDAT pins only,
IOH = -800 A, VDD = 5.0V
Input leakage current
ILI
——
±1
A
CS = DVDD,
VIN = DGND or DVDD
Output leakage current
ILO
——
±1
A
CS = DVDD,
VOUT = DGND or DVDD
Internal capacitance (all inputs and
outputs)
CINT
——
7
pF
TA = 25°C,
SCK = 1.0 MHz,
Note
1:
This parameter is periodically sampled and not 100% tested.