BQ2085 Datasheet, PDF (5/56 Pages) Texas Instruments – SBS-COMPLIANT GAS GAUGE IC FOR USE WITH THE bq29311

bq2085
POR BEHAVIOR
vs
FREE-AIR TEMPERATURE
2.50
SLUS541 – OCTOBER 2002
150
2.45
145
2.40
140
VIT_–
Vhys
2.35
135
2.30
130
2.25
125
2.20
120
2.15
115
2.10
–20
–5 10 25 40 55 70
TA – Free-Air Temperature – °C
Figure 1
110
85
INTEGRATING ADC CHARACTERISTICS
V_DD = 3.0 V to 3.6 V, T_A = –20°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V(SR)
V(SROS)
INL
Input voltage range, V(SR2) and V(SR1)
Input offset
Integral nonlinearity error
VSR = V(SR2) – V(SR1)
MIN
TYP
MAX
–0.3
1.0
1
0.003% 0.009%
UNIT
V
µV
PLL SWITCHING CHARACTERISTICS
V_DD = 3.0 V to 3.6 V, T_A = –20°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
t(sp) Start-up time (see Note 2)
±0.5% frequency error
NOTE 2: The frequency error is measured from 32.768 Hz.
Internal Oscillator
V_DD = 3.0 V to 3.6 V, T_A = –20°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
f(exo) Frequency error (see Note 3)
VDD = 3.3 V
–2%
–1%
f(sxo) Start-up time (see Note 4)
NOTES: 3. The frequency error is measured from 32.768 Hz.
4. The start-up time is defined as the time it takes for the oscillator output frequency to be ±1%.
TYP
2
TYP
MAX UNIT
5 ms
MAX
2%
1%
275
UNIT
µs
www.ti.com
5