BQ20Z75_08 Datasheet, PDF (9/20 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION-ENABLED IC WITH IMPEDANCE TRACK

bq20z75
www.ti.com............................................................................................................................................................... SLUS723C – JULY 2007 – REVISED JULY 2008
Electrical Characteristics (continued)
over operating free-air temperature range (unless otherwise noted), T_A = –40°C to 85°C, V_REG25 = 2.41 V to 2.59 V, V_BAT =
14V, C_REG25 = 1µF, C_REG33 = 2.2µF; typical values at T_A = 25°C (unless otherwise noted)
PARAMETER
f_(EIO)
Frequency error ^(12)(13)
t_(SXO)
Start-up time⁽¹⁴⁾
LOW FREQUENCY OSCILLATOR
f_(LOSC) Operating frequency
f_(LEIO)
Frequency error^(13)(15)
t_(LSXO)
Start-up time⁽¹⁴⁾
TEST CONDITIONS
T_A = 20°C to 70°C
T_A = 20°C to 70°C
MIN
–3%
–2%
TYP
0.25%
0.25%
2.5
MAX
3%
2%
5
UNIT
ms
–2.5%
–1.5%
32.768
0.25%
0.25%
kHz
2.5%
1.5%
500 µs
(12) The frequency error is measured from 4.194 MHz.
(13) The frequency drift is included and measured from the trimmed frequency at V_REG25 = 2.5V, T_A = 25°C
(14) The startup time is defined as the time it takes for the oscillator output frequency to be ±3%
(15) The frequency error is measured from 32.768 kHz.
Data Flash Characteristics Over Recommended Operating Temperature and Supply Voltage
Typical Values at T_A = 25°C and V_REG25= 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Data retention
10
Years
Flash programming write-cycles
t_(ROWPROG) Row programming time
t_(MASSERASE) Mass-erase time
t_(PAGEERASE) Page-erase time
I_(DDPROG) Flash-write supply current
I_(DDERASE) Flash-erase supply current
RAM BACKUP
See ⁽¹⁾
20k
Cycles
2
ms
200
ms
20
ms
5
10 mA
5
10 mA
I_(RB)
V_(RB)
RB data-retention input current
RB data-retention input voltage⁽¹⁾
V_(RBI) > V_(RBI)MIN , V_REG25 < V_IT–,
T_A = 85°C
V_(RBI) > V_(RBI)MIN , V_REG25 < V_IT–,
T_A = 25°C
1000 2500
nA
90 220
1.7
V
(1) Assured by design. Not production tested.
SMBus Timing Characteristics
T_A = –40°C to 85°C Typical Values at T_A = 25°C and V_(REG25) = 2.5 V (Unless Otherwise Noted)
PARAMETER
TEST CONDITIONS
MIN
f_SMB
SMBus operating frequency
f_MAS
SMBus master clock frequency
Slave mode, SMBC 50% duty cycle
10
Master mode, No clock low slave
extend
t_(BUF)
Bus free time between start and stop
4.7
(see Figure 1)
t_(HD:STA) Hold time after (repeated) start (see Figure 1)
4.0
t_(SU:STA) Repeated start setup time (see Figure 1)
4.7
t_(SU:STO) Stop setup time (see Figure 1)
4.0
t_(HD:DAT)
Data hold time (see Figure 1)
Receive mode
0
Transmit mode
300
t_(SU:DAT) Data setup time (see Figure 1)
250
TYP MAX
100
51.2
UNIT
kHz
kHz
µs
µs
µs
µs
ns
ns
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