Datasheet

www.ti.com
POWER-ON RESET
2.10
2.15
2.20
2.25
2.30
2.35
2.40
2.45
2.50
-20 -10 0 10 20 30 40 50 60 70 80
100
105
110
115
120
125
130
135
140
T
A
- Free-Air Temperature - °C
- Negative Going Input Threshold Voltage - V
POWER ON RESET BEHAVIOR
vs
FREE-AIR TEMPERATURE
V
IT
V
IT-
V
hys
V
hys
- Hysterisis Voltage - mV
INTEGRATING ADC (Coulomb Counter) CHARACTERISTICS
PLL SWITCHING CHARACTERISTICS
OSCILLATOR
bq20z80-V102
SLUS681B – NOVEMBER 2005 – REVISED JANUARY 2007
V
DD
= 3 V to 3.6 V, T
A
= –40 ° C to 85 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IT–
Negative-going voltage input 2.1 2.3 2.5 V
V
HYS
Power-on reset hysteresis 50 150 200 mV
V
DD
= 3 V to 3.6 V, T
A
= –40 ° C to 85 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
(SR)
Input voltage range, V
(SR2)
and V
(SR1)
V
(SR)
= V(SR2) – V(SR1) –0.25 0.25 V
V
(SROS)
Input offset 1 µ V
INL Integral nonlinearity error 0.004% 0.019%
V
DD
= 3 V to 3.6 V, T
A
= –40 ° C to 85 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
(SP)
Start-up time
(1)
0.5% frequency error 2 5 ms
(1) The frequency error is measured from the trimmed frequency of the internal system clock which is 128 oscillator frequency, nominally
4.194 MHz.
V
DD
= 3 V to 3.6 V, T
A
= –40 ° C to 85 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ROSC = 100 k Ω –2% 0.25% 2%
f
(exo)
Frequency error from 32.768 kHz ROSC = 100 k Ω , V
DD
= 3.3 V –1% 0.25% 1%
XCK1 = 12-pF XTAL –0.25% 0.25%
ROSC = 100 k Ω 250 µ s
f
(sxo)
Start-up time
(1)
XCK1 = 12-pF XTAL 200 ms
(1) The start-up time is defined as the time it takes for the oscillator output frequency to be within 1% of the specified frequency.
5
Submit Documentation Feedback