Datasheet

13
bq2018
Performance Characteristics (T
A
=T
OPR
)
Symbol Parameter Typical Maximum Unit Notes
V
OS
Offset voltage
±500 µV
Voltage offset between SR1 and SR2
OSC Timer accuracy 1.5 ±3.0 %
V
CC
=3.5 - 3.9V (T
A
= 0–70°C)
INR
Integrated non-
repeatability error
0.5 1.0 %
Measured repeatability given similar
operating conditions
INL
Integrated
non-linearity
1.0 2.0 %
Add 0.05% per °C above or below
25°C and 0.5% per volt above or be
-
low 3.7V.
Standard Serial Communication Timing Specification (T
A
=T
OPR
)
Symbol Parameter Minimum Typical Maximum Unit Notes
t
CYCH
Cycle time, host to bq2018 (write) 190 - -
µ
s
t
CYCB
Cycle time, bq2018 to host (read) 190 205 250
µ
s
t
STRH
Start hold, host to bq2018 (write) 5 - - ns
t
STRB
Start hold, bq2018 to host (read) 32 - -
µ
s
t
DSU,B
Data setup - - 50
µ
s
t
DH
Data hold 90 - -
µ
s
t
DV
Data valid - - 80
µ
s
t
SSUB
Stop setup (bq2018 to host) - - 95
µ
s
t
SSU
Stop setup (host to bq2018) - - 145
µ
s
t
B
Break 190 - -
µ
s
t
BR
Break recovery 40 - -
µ
s
t
RSPS
Response time, bq2018 to host 190 - 320
µ
s
t
RR
Read recovery 40 - -
µ
s
Host read to next
cycle