Datasheet

3
LTC1590
V
CC
= 4.5V to 5.5V, V
REF
= 10V, V
OUT1
= V
OUT2
= AGND = DGND = 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Analog Outputs
C
OUT
Output Capacitance (Note 3) DAC Register Loaded to All 1s ● 60 90 pF
DAC Register Loaded to All 0s ● 30 60 pF
Digital Input
V
IH
Digital Input High Voltage ● 2.4 V
V
IL
Digital Input Low Voltage ● 0.8 V
I
IN
Digital Input Current ● 0.001 ±1 µA
C
IN
Digital Input Capacitance (Note 3) V
IN
= 0V ● 8pF
Digital Output
V
OH
Digital Output High Voltage I
OH
= 200µA ● 4V
V
OL
Digital Output Low Voltage I
OH
= 1.6mA ● 0.4 V
Timing Characteristics
t
1
D
IN
to CLK Setup Time ● 50 ns
t
2
D
IN
to CLK Setup Hold Time ● 0ns
t
3
CLK High Time ● 40 ns
t
4
CLK Low Time ● 40 ns
t
5
CS/LD High Time ● 50 ns
t
6
LSB CLK to CS/LD ● 40 ns
t
7
CS/LD Low to CLK High ● 20 ns
t
8
CLK Low to CS/LD Low ● 20 ns
t
9
CLK to D
OUT
Delay ● 10 160 ns
Power Supply
V
CC
Operating Supply Range ● 4.5 5 5.5 V
I
CC
Supply Current Digital Inputs = 0V or V
CC
● 10 µA
Note 8: Glitch on DAC A or DAC B output when the other DAC makes a
full-scale transition.
Note 9: 10Hz to 100kHz. Calculation from e
n
= √4KTRB where:
K = Boltzmann constant (J/K°); R = resistance (Ω); T = resistor temperature
(°K); B = bandwidth (Hz).
Note10: V
REF
= 6V
RMS
at 1kHz. DAC register loaded with all 1s, using
LT
®
1124 op amp.
Note 11: V
REF
= ±10V, 10kHz sine wave, DAC register loaded with all 0s,
using LT1358 op amp.
Note 12: –3dB bandwidth using LT1358 op amp.
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.
Note 5: OUT1 load = 100Ω in parallel with 13pF.
Note 6: V
REF
= 0V. DAC register contents changed from all 0s to all 1s or
all 1s to all 0s.
Note 7: DAC A output with V
REF A
= 0V and V
REF B
= 10kHz 20V
P-P
, or
DAC B output with V
REF B
= 0V, V
REF A
= 10kHz 20V
P-P
. Both DAC registers
loaded with all 1s.