BQ20Z75DBTR-V180 Datasheet, PDF (8/23 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE AND PROTECTION-ENABLED IC WITH IMPEDANCE TRACK

bq20z75-V180
SLUSA22 – DECEMBER 2009
www.ti.com
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
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
Output voltage high⁽¹⁾
SAFE, I_L = –0.5 mA
V_REG25–0.
5
V
V_OL
C_I
I_(SAFE)
I_lkg(SAFE)
I_lkg
ADC ⁽²⁾
Low-level output voltage
Input capacitance
SAFE source currents
SAFE leakage current
Input leakage current
PRES, PFIN, ALERT, I_L = 7 mA;
SAFE active, SAFE = V_REG25 –0.6 V
SAFE inactive
–3
–0.2
0.4 V
5
pF
mA
0.2 µA
1 µA
Input voltage range
TS1,TS2, using external V_ref
–0.2
V_REG25+
0.2
V
Conversion time
31.5
ms
Resolution (no missing codes)
16
bits
Effective resolution
Integral nonlinearity
Offset error⁽⁴⁾
Offset error drift⁽⁴⁾
Full-scale error⁽⁵⁾
T_A = 25°C to 85°C
14
15
bits
±0.03 %FSR⁽³⁾
140
250 µV
2.5
18 μV/°C
±0.1% ±0.7%
Full-scale error drift
Effective input resistance⁽⁶⁾
50
8
PPM/°C
MΩ
COULOMB COUNTER
Input voltage range
–0.20
0.20 V
Conversion time
Single conversion
250
ms
Effective resolution
Single conversion
15
bits
Integral nonlinearity
Offset error ⁽⁷⁾
Offset error drift
Full-scale error^{(8) (9)}
–0.1 V to 0.20 V
–0.20 V to –0.1 V
T_A = 25°C to 85°C
±0.007
±0.007
10
0.4
±0.35%
±0.034
%FSR
µV
2.45 µV/°C
Full-scale error drift
Effective input resistance⁽¹⁰⁾
INTERNAL TEMPERATURE SENSOR
V_(TEMP) Temperature sensor voltage⁽¹¹⁾
VOLTAGE REFERENCE
T_A = 25°C to 85°C
150
2.5
–2.0
PPM/°C
MΩ
mV/°C
Output voltage
1.215
1.225 1.230 V
Output voltage drift
65
PPM/°C
HIGH FREQUENCY OSCILLATOR
f_(OSC)
Operating frequency
4.194
MHz
(1) RC[0:7] bus
(2) Unless otherwise specified, the specification limits are valid at all measurement speed modes
(3) Full-scale reference
(4) Post-calibration performance and no I/O changes during conversion with SRN as the ground reference
(5) Uncalibrated performance. This gain error can be eliminated with external calibration.
(6) The A/D input is a switched-capacitor input. Since the input is switched, the effective input resistance is a measure of the average
resistance.
(7) Post-calibration performance
(8) Reference voltage for the coulomb counter is typically V_ref/3.969 at V_REG25 = 2.5 V, T_A = 25°C.
(9) Uncalibrated performance. This gain error can be eliminated with external calibration.
(10) The CC input is a switched capacitor input. Since the input is switched, the effective input resistance is a measure of the average
resistance.
(11) –53.7 LSB/°C
8
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