Linear Technology LTC3350, Руководство пользователя

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LTC3350
6
3350fc
For more information www.linear.com/LTC3350
elecTrical characTerisTics
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= V
OUT
= 12V, V
DRVCC
= V
INTVCC
unless otherwise
noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Analog-to-Digital Converter
V
RES
Measurement Resolution 16 Bits
V
GPI
General Purpose Input Voltage Range Unbuffered
Buffered
0
0
5
3.5
V
V
I
GPI
General Purpose Input Pin Leakage Current Buffered Input 1 μA
R
GPI
GPI Pin Resistance Buffer Disabled 2.5 MΩ
Measurement System Error
V
ERR
Measurement Error (Note 5) V
IN
= 0V
V
IN
= 30V
100
1.5
mV
%
V
OUTSP
= 5V
V
OUTSP
= 30V
100
1.5
mV
%
V
CAP
= 0V
V
CAP
= 10V
100
1.5
mV
%
V
GPI
= 0V, Unbuffered
V
GPI
= 3.5V, Unbuffered
2
1
mV
%
V
CAP1
= 0V
V
CAP1
= 2V
2
1
mV
%
V
CAP2
= 0V
V
CAP2
= 2V
2
1
mV
%
V
CAP3
= 0V
V
CAP3
= 2V
2
1
mV
%
V
CAP4
= 0V
V
CAP4
= 2V
2
1
mV
%
V
SNSI
= 0mV
V
SNSI
= 32mV
200
2
µV
%
V
SNSC
= 0mV
V
SNSC
= 32mV
200
2
µV
%
CAP1 to CAP4
R
SHNT
Shunt Resistance 0.5 Ω
DV
CAPMAX
Maximum Capacitor Voltage with Shunts Enabled 2 or More Capacitors in Stack 3.6 V
Programming Pins
V
ITST
ITST Voltage R
TST
= 121Ω 1.185 1.197 1.209 V
I
2
C/SMBus – SDA, SCL, SMBALERT
I
IL,SDA,SCL
Input Leakage Low –1 1 µA
I
IH,SDA,SCL
Input Leakage High –1 1 µA
V
IH
Input High Threshold 1.5 V
V
IL
Input Low Threshold 0.8 V
f
SCL
SCL Clock Frequency 400 kHz
t
LOW
Low Period of SCL Clock 1.3 µs
t
HIGH
High Period of SCL Clock 0.6 µs
t
BUF
Bus Free Time Between Start and Stop Conditions 1.3 µs
t
HD,STA
Hold Time, After (Repeated) Start Condition 0.6 µs
t
SU,STA
Setup Time After a Repeated Start Condition 0.6 µs