BQ34Z110 Datasheet, PDF (6/11 Pages) Texas Instruments – Wide Range Fuel Gauge with Impedance Track™ for Lead-Acid Batteries

bq34z110
SLUSB55 – JUNE 2012
www.ti.com
INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS
T_A = –40°C to 85°C, 2.4 V < REG25 < 2.6 V; Typical Values at T_A = 25°C and REG25 = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_(SR)
t_{SR_CONV}
Input voltage range, V_(SRN) and V_(SRP)
Conversion time
Resolution
V_(SR) = V_(SRN) – V_(SRP)
Single conversion
–0.125
14
0.125
V
1
s
15
bits
V_OS(SR)
I_NL
Z_IN(SR)
I_lkg(SR)
Input offset
Integral nonlinearity error
Effective input resistance (1)
Input leakage current⁽¹⁾
10
µV
±0.007 ±0.034 % FSR
2.5
MΩ
0.3
µA
(1) Assured by design. Not tested in production.
ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS
T_A = –40°C to 85°C, 2.4 V < REG25 < 2.6 V; Typical Values at T_A = 25°C and REG25 = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_IN(ADC)
t_{ADC_CONV}
Input voltage range
Conversion time
Resolution
0.05
1
V
125
ms
14
15
bits
V_OS(ADC)
Input offset
1
mV
Z_ADC1
Effective input resistance (TS) (1)
8
MΩ
Z_ADC2
Effective input resistance (BAT)(1)
bq34z110 not measuring cell
voltage
8
MΩ
bq34z110 measuring cell voltage
100
KΩ
I_lkg(ADC)
Input leakage current (1)
0.3
µA
DATA FLASH MEMORY CHARACTERISTICS
T_A = –40°C to 85°C, 2.4 V < REG25 < 2.6 V; Typical Values at T_A = 25°C and REG25 = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Data retention⁽¹⁾
t_DR
Flash-programming write cycles⁽¹⁾
10
20,000
Years
Cycles
t_WORDPROG
I_CCPROG
Word programming time⁽¹⁾
Flash-write supply current⁽¹⁾
2
ms
5
10
mA
(1) Assured by design. Not tested in production.
HDQ COMMUNICATION TIMING CHARACTERISTICS
T_A = –40°C to 85°C, C_REG = 0.47 μF, 2.45 V < V_REGIN = V_BAT < 5.5 V; typical values at T_A = 25°C and V_REGIN = V_BAT = 3.6 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
t_(CYCH)
t_(CYCD)
t_(HW1)
t_(DW1)
t_(HW0)
t_(DW0)
t_(RSPS)
t_(B)
t_(BR)
t_(RISE)
t_(RST)
Cycle time, host to bq34z110
Cycle time, bq34z110 to host
Host sends 1 to bq34z110
bq34z110 sends 1 to host
Host sends 0 to bq34z110
bq34z110 sends 0 to host
Response time, bq34z110 to host
Break time
Break recovery time
HDQ line rising time to logic 1 (1.2 V)
HDQ Reset
190
μs
190
205
250
μs
0.5
50
μs
32
50
μs
86
145
μs
80
145
μs
190
950
μs
190
μs
40
μs
950
ns
1.8
2.2
s
6
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