Datasheet

MAX31850/MAX31851
Cold-Junction Compensated, 1-Wire
Thermocouple-to-Digital Converters
21Maxim Integrated
Figure 11. Read/Write Time Slot Timing Diagram
Figure 12. Detailed Master Read-One Timing
V
PU
1-Wire BUS
START
OF SLOT
START
OF SLOT
60µs < Tx “0” < 120µs
1µs < t
REC
< ∞
1µs < t
REC
< ∞
> 1µs
> 1µs
MASTER SAMPLES
MASTER SAMPLES
> 1µs
15µs 15µs 30µs
MASTER WRITE-ZERO SLOT
MAX31850/MAX31851 SAMPLES
MIN MAXTYP
MAX31850/MAX31851 SAMPLES
MIN MAXTYP
MASTER WRITE-ONE SLOT
MASTER READ-ZERO SLOT MASTER READ-ONE SLOT
GND
V
PU
1-Wire BUS
GND
15µs 45µs 15µs
15µs 15µs 30µs
BUS MASTER PULLING LOW MAX31850/MAX31851PULLING LOW RESISTOR PULLUP
V
IH
OF MASTER
MASTER SAMPLES
V
PU
1-Wire BUS
GND
15µs
t
INIT
> 1µs t
RC
BUS MASTER PULLING LOW RESISTOR PULLUP