4
LTC7543/LTC8143
V
DD
= 5V, V
REF
= 10V, V
OUT1
= V
OUT2
= AGND = DGND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise specified.
ELECTRICAL CHARACTERISTICS – LTC7543/LTC8143
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: ±0.5LSB = ±0.012% of full scale.
Note 2: Using internal feedback resistor.
Note 3: Guaranteed by design, not subject to test.
Note 4: I
OUT1
with DAC register loaded with all 0s or I
OUT2
with DAC
register loaded with all 1s.
Note 5: Typical temperature coefficient is 100ppm/°C.
Note 6: OUT 1 load = 100Ω in parallel with 13pF.
Note 7: To 0.01% for a full-scale change, measured from falling edge of
LD1 or LD2.
Note 8: V
REF
= 0V. DAC register contents changed from all 0s to all 1s or
from all 1s to all 0s.
Note 9: V
REF
= 6V
RMS
at 1kHz. DAC register loaded with all 1s.
Note 10: Calculation from e
n
= √4KTRB where: K = Boltzmann constant
(J/K°); R = resistance (Ω); T = resistor temperature (°K); B = bandwidth
(Hz).
Note 11: Minimum high time for STB1, STB2, STB4. Minimum low time
for STB3.
Note 12. Minimum low time for STB1, STB2, STB4. Minimum high time
for STB3.
LTC7543/LTC8143
ALL GRADES
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Timing Characteristics (Note 3)
t
DS1
Serial Input to Strobe Setup Time STB1 Used as the Strobe ● 50 5 ns
t
DS2
STB2 Used as the Strobe ● 20 –5 ns
t
DS3
STB3 Used as the Strobe ● 0–30 ns
t
DS4
STB4 Used as the Strobe ● 0–30 ns
t
DH1
Serial Input to Strobe Hold Time STB1 Used as the Strobe ● 30 10 ns
t
DH2
STB2 Used as the Strobe ● 50 25 ns
t
DH3
STB3 Used as the Strobe ● 80 55 ns
t
DH4
STB4 Used as the Strobe ● 80 55 ns
t
SRI
Serial Input Data Pulse Width ● 80 ns
t
STB1
, t
STB2
, Strobe Pulse Width (Note 11) ● 80 ns
t
STB3
, t
STB4
t
STB1
, t
STB2
, Strobe Pulse Width (Note 12) ● 80 ns
t
STB3
, t
STB4
t
LD1
, t
LD2
Load Pulse Width ● 140 ns
t
ASB
LSB Strobed into Input Register ● 0ns
to Load DAC Register Time
t
CLR
Clear Pulse Width ● 80 ns
SRO Timing Characteristics (LTC8143 Only)
t
PD
STB2, STB3, STB4 Strobe to SRO C
L
= 50pF ● 220 120 ns
Propagation Delay
t
PD1
STB1 to SRO Propagation Delay C
L
= 50pF ● 150 80 ns
Power Supply
V
DD
Supply Voltage ● 4.75 5 5.25 V
I
DD
Supply Current Digital Inputs = 0V or V
DD
● 0.1 mA
Digital Inputs = V
IH
or V
IL
● 2mA
(t
STB
= 80ns)
(t
STB
= 80ns)
