Rainbow Electronics DS2761 - Manual (Page 24)

DS2761
24 of 24
ELECTRICAL CHARACTERISTICS:
1-WIRE INTERFACE
(-20 °C to +70°C, 2.5V £ V
DD
£ 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Time Slot t
SLOT
60 120 m s
Recovery Time t
REC
1 m s
Write 0 Low Time t
LOW0
60 120 m s
Write 1 Low Time t
LOW1
1 15 m s
Read Data Valid t
RDV
15 m s
Reset Time High t
RSTH
480 m s
Reset Time Low t
RSTL
480 960 m s
Presence Detect High t
PDH
15 60 m s
Presence Detect Low t
PDL
60 240 m s
SWAP Timing Pulse Width t
SWL
0.2 120 m s
SWAP Timing Pulse Falling
Edge to DC Release t
SWOFF
0 1 ms 12
SWAP Timing Pulse Rising Edge
to DC Engage t
SWON
0 1 ms 12
DQ Capacitance C
DQ
60 pF
EEPROM RELIABILITY SPECIFICATION (-20 °C to +70°C, 2.5V £ V
DD
£ 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Copy to EEPROM Time t
EEC
2 10 ms
EEPROM Copy Endurance N
EEC
25000 cycles 11
NOTES
1) All voltages are referenced to V
SS
.
2) See the Ordering Information section to determine the corresponding part number for each V
OV
value.
3) Internal current-sense resistor configuration.
4) External current-sense resistor configuration.
5) Self-heating due to output pin loading and sense resistor power dissipation can alter the reading from
ambient conditions.
6) Voltage offset measurement is with respect to V
OV
at +25°C.
7) The current register supports measurement magnitudes up to 2.56A using the internal sense resistor
option and 64mV with the external resistor option. Compensation of the internal sense resistor value
for process and temperature variation can reduce the maximum reportable magnitude to 1.9A.
8) Current offset error null to ±1LSB typically requires 3.5s in-system calibration by user.
9) Current gain error specification applies to gain error in converting the voltage difference at IS1 and
IS2, and excludes any error remaining after the DS2761 compensates for the internal sense resistor’s
temperature coefficient of 3700ppm/
°C to an accuracy of ±500ppm/°C. The DS2761 does not
compensate for external sense resistor characteristics, and any error terms arising from the use of an
external sense resistor should be taken into account when calculating total current measurement error.
10) Typical value for t
ERR
is at 3.6V and +25 °C.
11) Four year data retention at +70 °C.
12) Typical load capacitance on DC and CC is 1000pF.
13) Test conditions are PLS = 4.1V, V
DD
= 2.5V. Maximum current for conditions of PLS = 15V,
V
DD
= 0V is 10mA.