Linear Technology LTC2942 Battery Gas Gauge w/ I²C (requires DC590B) DC1496B-B DC1496B-B Data Sheet
Product codes
DC1496B-B
LTC2942
3
2942fa
elecTrical characTerisTics
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
q
LSB
Charge LSB (Note 4)
Prescaler M = 128 (Default), R
SENSE
= 50mΩ
0.085
mAh
TCE
Total Charge Error (Note 5)
10mV ≤ |V
SENSE
| ≤ 50mV DC
±1
%
10mV ≤ |V
SENSE
| ≤ 50mV DC, V
SENSE
+
≤ 4.2V
l
±1.5
%
1mV ≤ |V
SENSE
| < 50mV DC (Note 8)
l
±3.5
%
Voltage Measurement ADC
Resolution (No Missing Codes)
(Note 8)
l
14
Bits
V
FS
Full-Scale Voltage
l
6
V
∆V
LSB
Quantization Step of 14-Bit
Voltage ADC
(Note 6)
366.2
µV
TUE
V
Voltage Total Unadjusted Error
l
1
1.3
%
%
Gain
Gain Accuracy
l
1.3
%
V
OS
Offset
Extrapolated from Measurements at 5.5V and 2.7V
±1
±10
LSB
INL
Integral Nonlinearity
l
±1
±4
LSB
t
CONV
Conversion Time
l
15
ms
Temperature Measurement ADC
Resolution (No Missing Code)
(Note 8)
10
Bits
T
FS
Full-Scale Temperature
l
600
K
∆T
LSB
Quantization Step of 10-Bit
Temperature ADC
(Note 6)
0.586
K
TUE
T
Temperature Total Unadjusted
Error
V
SENSE+
≥ 2.8V (Note 8)
l
±5
±3
K
K
t
CONV
Conversion Time
l
15
ms
Digital Inputs and Digital Outputs
V
V
ITH
Logic Input Threshold, AL/CC,
SCL, SDA
l
0.3 • V
SENSE+
0.7 • V
SENSE+
V
V
OL
Low Level Output Voltage, AL/CC,
SDA
I = 3mA
l
0.4
V
I
IN
Input Leakage, AL/CC, SCL, SDA
V
IN
= V
SENSE+
/2
l
1
µA
C
IN
Input Capacitance, AL/CC, SCL,
SDA
(Note 8)
l
10
pF
t
PCC
Minimum Charge Complete (CC)
Pulse Width
1
µs
I
2
C Timing Characteristics
f
SCL(MAX)
Maximum SCL Clock Frequency
l
400
900
kHz
t
BUF(MIN)
Bus Free Time Between STOP/
START
l
1.3
µs
t
SU,STA(MIN)
Minimum Repeated START
Set-Up Time
l
600
ns
t
HD,STA(MIN)
Minimum Hold Time (Repeated)
START Condition
l
600
ns
t
SU,STO(MIN)
Minimum Set-Up Time for STOP
Condition
l
600
ns
t
SU,DAT(MIN)
Minimum Data Set-Up
Time Input
l
100
ns
t
HD,DATI(MIN)
Minimum Data Hold Time Input
l
0
µs