BQ40Z50 Datasheet, PDF (11/30 Pages) Texas Instruments – 1-Series, 2-Series, 3-Series, and 4-Series Li-Ion Battery Pack Manager

bq40z50
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SLUSBS8 – DECEMBER 2013
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
I_LEDCNTLx
Current matching
between LEDCNTLx
V_BAT = V_LEDCNTLx + 2.5 V
+/–1
%
C_IN
I_LKG
f_LEDCNTLx
Input capacitance
Input leakage current
Frequency of LED
pattern
20
pF
1
µA
124
Hz
COULOMB COUNTER
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
PARAMETER
TEST CONDITION
Input voltage range
Full scale range
Integral nonlinearity⁽¹⁾
16-bit, best fit over input voltage range
Offset error
16-bit, Post-calibration
Offset error drift
15-bit + sign, Post-calibration
Gain error
15-bit + sign, over input voltage range
Gain error drift
15-bit + sign, over input voltage range
Effective input resistance
(1) 1 LSB = V_REF1/(10 × 2^N) = 1.215/(10 × 2¹⁵) = 3.71 µV
MIN
–0.1
–V_REF1/10
TYP
±5.2
±5
0.2
±0.2
2.5
MAX
0.1
V_REF1/10
±22.3
±10
0.3
±0.8
150
UNIT
V
V
LSB
µV
µV/°C
%FSR
PPM /°C
MΩ
CC DIGITAL FILTER
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
PARAMETER
Conversion time
Effective resolution
TEST CONDITION
Single conversion
Single conversion
MIN
TYP
MAX
UNIT
250
ms
15
Bits
ADC
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN
TYP
MAX
UNIT
Input voltage range
Full scale range
Integral nonlinearity⁽¹⁾
Offset error⁽²⁾
Offset error drift
Gain error
Gain error drift
Effective input resistance
Internal reference (V_REF1)
External reference (V_REG)
V_FS = V_REF1 or V_REG
16-bit, best fit, –0.1 V to 0.8 x V_REF1
16-bit, best fit, –0.2 V to –0.1 V
16-bit, Post-calibration, V_FS = V_REF1
16-bit, Post-calibration, V_FS = V_REF1
16-bit, –0.1 V to 0.8 x V_FS
16-bit, –0.1 V to 0.8 x V_FS
–0.2
–0.2
–V_FS
8
1
V
0.8 x V_REG
V_FS
V
±6.6
LSB
±13.1
±67
±157
µV
0.6
3
µV/°C
±0.2
±0.8
%FSR
150
PPM/°C
MΩ
(1) 1 LSB = V_REF1/(2^N) = 1.225/(2¹⁵) = 37.4 µV (when t_CONV = 31.25 ms)
(2) For VC1–VSS, VC2–VC1, VC3–VC2, VC4–VC3, VC4–VSS, PACK–VSS, and V_REF1/2, the offset error is multiplied by (1/ADC
multiplexer scaling factor (K)).
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