BQ27425-G2_15 Datasheet, PDF (7/39 Pages) Texas Instruments – Fuel Gauge With Integrated Sense Resistor

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bq27425-G2
SLUSB23B – OCTOBER 2012 – REVISED JUNE 2015
7.11 Timing Requirements: I²C-Compatible Interface Communication
T_A = –40°C to 85°C; typical values at T_A = 25°C and V_REGIN = 3.6 V (unless otherwise noted)
MIN
NOM
MAX UNIT
t_r
t_f
t_w(H)
t_w(L)
t_su(STA)
t_d(STA)
t_su(DAT)
t_h(DAT)
t_su(STOP)
t_(BUF)
f_SCL
SCL or SDA rise time
SCL or SDA fall time
SCL pulse duration (high)
SCL pulse duration (low)
Setup for repeated start
Start to first falling edge of SCL
Data setup time
Data hold time
Setup time for stop
Bus free time between stop and start
Clock frequency⁽¹⁾
300
ns
300
ns
600
ns
1.3
μs
600
ns
600
ns
100
ns
0
ns
600
ns
66
μs
400
kHz
(1) If the clock frequency (f_SCL) is > 100 kHz, use 1-byte write commands for proper operation. All other transactions types are supported at
400 kHz. (See I²C Interface and I²C Command Waiting Time)
t_SU(STA)
t_w(H)
t_w(L)
t_f
t_r
t_(BUF)
SCL
SDA
t_d(STA)
t_f
t_r
t_h(DAT)
t_su(DAT)
t_su(STOP)
REPEATED
START
STOP
START
Figure 1. I²C-Compatible Interface Timing Diagrams
7.12 Typical Characteristics
2.65
2.6
2.55
2.5
2.45
2.4
2.35
VREGIN = 2.7 V
VREGIN = 4.5 V
Temperature (GC)
D001
8.8
8.7
8.6
8.5
8.4
8.3
8.2
8.1
8
-40 -20
0
20
40
60
Temperature (GC)
80 100
D002
Figure 2. Regulator Output Voltage vs Temperature
Figure 3. High-Frequency Oscillator Frequency vs
Temperature
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