Datasheet

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
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