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LTC3207/LTC3207-1
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V BAT = 3.6V, DV CC = 3V, ENU = Hi, CAMHL = LO, C1 = C2 = C3 = 2.2 μ F,
C4 = 4.7 μ F, unless otherwise noted.
PARAMETER
LED Current Matching
LED Dropout Voltage
Blink Rate Period
CONDITIONS
Any Two Outputs, 50% of FS
I LED = FS
REG15, D6 and D7
MIN
TYP
2
180
1.25
MAX
UNITS
%
mV
s
2.5
s
ULED Up/Down Gradation Times
V OL General Purpose Output Mode (GPO)
REG15, D4 and D5
I OUT = 1mA, Single Output Enabled
●
●
●
0.24
0.48
0.96
7
0.45
0.9
1.8
s
s
s
s
s
s
mV
CAM LED Current, 4-Bit Linear DAC, CAM = 1V
Full-Scale LED Current
Minimum (1LSB) LED Current
425
29
mA
mA
LED Dropout Voltage
High Current Safety Timer
I LED = FS
High Current Mode
450
2.1
mV
s
Charge Pump (CPO)
1x Mode Output Impedance
0.6
Ω
1.5x Mode Output Impedance
2x Mode Output Impedance
CPO Regulation Voltage
V BAT = 3V, V CPO = 4.2V (Note 5)
V BAT = 3V, V CPO = 4.8V (Note 5)
1.5x Mode, I CPO = 20mA
2x Mode, I CPO = 20mA
3.6
4.1
4.55
5.05
Ω
Ω
V
V
CLOCK Frequency
●
0.65
0.85
1.05
MHz
SDA, SCL, ENU, CAMHL
V IL
V IH
●
●
0.7 ? DV CC
0.3 ? DV CC
V
V
I IH
I IL
V OL
SDA, SCL, ENU, CAMHL = DV CC
SDA, SCL, ENU, CAMHL = 0V
I PULLUP = 3mA
●
●
●
–1
–1
0.12
1
1
0.4
μA
μA
V
Digital Output Low (SDA)
Serial Port Timing (Notes 6, 7)
t SCL
t BUF
t HD,STA
t SU,STA
t SU,STO
Clock Operating Frequency
Bus Free Time Between Stop and Start Condition
Hold Time After (Repeated) Start Condition
Repeated Start Condition Setup Time
Stop Condition Setup Time
1.3
0.6
0.6
0.6
400
kHz
μs
μs
μs
μs
t HD,DAT(OUT)
t HD,DAT(IN)
t SU,DAT
t LOW
t HIGH
Output Data Hold Time
Input Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
0
0
100
1.3
0.6
900
ns
ns
ns
μs
μs
3207fc
3
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