BQ2019PW Datasheet, PDF (4/27 Pages) Texas Instruments – ADVANCED BATTERY MONITORIC

bq2019
ADVANCED BATTERY MONITOR IC
SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003
electrical characteristics over recommended operating temperature and supply voltage (unless
otherwise noted)
dc
PARAMETER
VOL
IOL
VIL
VIH
VIH
Z(SR)
Digital output low HDQ pin
Digital output low sink current
Digital input low HDQ pin
Digital input high HDQ pin
Digital input high HDQ pin
SR input impedance
IOL = 350 µA
TEST CONDITIONS
VCC < 4.2 V
VCC > 4.2 V
0.2 V < VSR <VCC
MIN TYP
1.7
1.9
10
MAX
0.4
350
0.7
UNIT
V
µA
V
V
R
MΩ
ac
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Power on reset delay Delay time after VCC is at least 2.8 V before HDQ communication is attempted.
500 ms
timer characteristics over recommended operating temperature and supply voltage (unless
otherwise noted)
PARAMETER
Oscillator current coefficient
Timer accuracy error
TEST CONDITIONS
Variation of oscillator frequency due to change in ROSC
ROSC = 100 kΩ
MIN TYP
–3%
MAX
10
3%
UNIT
ppm/Ω
temperature register characteristics over recommended operating temperature and supply
voltage (unless otherwise noted)
PARAMETER
Reported temperature resolution
Reported temperature accuracy
Reported temperature drift
TEST CONDITIONS
VCC = 3.6 V
MIN
–3
TYP
1
–2
MAX
3
UNIT
°K
°K
°K/V
REG pin characteristics over recommended operation temperature and supply voltage (unless
otherwise noted)
PARAMETER
Regulator threshold
Vgs(off)
TEST CONDITIONS
N-channel JFET for regulation
MIN
4.5
1.5
TYP
4.75
MAX
5
4.2
UNIT
V
V
4
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