LTC2946
5
2946fa
For more information www.linear.com/LTC2946
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive. All voltages are referenced to
ground, unless otherwise noted.
Note 3: An internal shunt regulator limits the INTV
CC
pin to a minimum of
5.8V. Driving this pin to voltages beyond 5.8V may damage the part. This
pin can be safely tied to higher voltages through a resistor that limits the
current below 35mA.
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
is from 4V to 100V, unless otherwise noted. (Note 2)
Note 4: Internal clamps limit the SCL and SDAI pins to a minimum of
5.9V. Driving these pins to voltages beyond the clamp may damage the
part. The pins can be safely tied to higher voltages through resistors that
limit the current below 5mA.
Note 5: ΔSENSE is defined as V
SENSE
+
– V
SENSE
–
Note 6: TUE = (ACTUAL CODE – IDEAL CODE)/4096 • 100% where IDEAL
CODE is derived from a straight line passing through Code 0 at 0V and
theoretical code of 4096 at V
FS
.
Note 7: Guaranteed by design and not subject to test.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
SDA,SCL(TH)
SDAI, SCL Input Threshold
l
1.5 1.8 2.1 V
V
SDA,SCL(CL)
SDAI, SCL Clamp Voltage I
SDAI
, I
SCL
= 3mA
l
5.9 6.4 6.9 V
I
2
C Interface Timing
f
SCL(MAX)
Maximum SCL Clock Frequency
l
400 kHz
t
LOW
SCL LOW Period
l
0.65 1.3 μs
t
HIGH
SCL HIGH Period
l
50 600 ns
t
BUF(MIN)
Bus Free Time Between
STOP/START Condition
l
0.12 1.3 μs
t
HD,STA(MIN)
Hold Time After (Repeated) START
Condition
l
140 600 ns
t
SU,STA(MIN)
Repeated START Condition
Setup Time
l
30 600 ns
t
SU,STO(MIN)
STOP Condition Setup Time
l
30 600 ns
t
HD,DATI(MIN)
Data Hold Time Input
l
–100 0 ns
t
HD,DATO(MIN)
Data Hold Time Output
l
300 600 900 ns
t
SU,DAT(MIN)
Data Setup Time
l
30 100 ns
t
SP(MAX)
Maximum Suppressed Spike Pulse Width
l
50 110 250 ns
t
RST
Stuck Bus Reset Time SCL or SDAI Held Low
l
25 33 ms
C
X
SCL, SDAI Input Capacitance (Note 7) 5 10 pF
TYPICAL PERFORMANCE CHARACTERISTICS
V
DD
Supply Current INTV
CC
Supply Current INTV
CC
Load Regulation
V
DD
SUPPLY VOLTAGE (V)
0
20
SUPPLY CURRENT (µA)
26
20 40 8060
1000
22
800
700
24
900
100
SHUTDOWN
NORMAL
INTV
CC
SUPPLY VOLTAGE (V)
2
15
SUPPLY CURRENT (µA)
30
3 4 5
900
20
700
600
25
800
6
SHUTDOWN
NORMAL
LOAD CURRENT (mA)
0
4.8
INTV
CC
VOLTAGE (V)
5.0
2 4 86
5.2
4.9
5.1
10
