3
LTC1590
VCC = 4.5V to 5.5V, VREF = 10V, VOUT1 = VOUT2 = AGND = DGND = 0V, TA = TMIN to TMAX, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Analog Outputs
COUT
Output Capacitance (Note 3)
DAC Register Loaded to All 1s
q
60
90
pF
DAC Register Loaded to All 0s
q
30
60
pF
Digital Input
VIH
Digital Input High Voltage
q
2.4
V
VIL
Digital Input Low Voltage
q
0.8
V
IIN
Digital Input Current
q
0.001
±1
A
CIN
Digital Input Capacitance
(Note 3) VIN = 0V
q
8pF
Digital Output
VOH
Digital Output High Voltage
IOH = 200A
q
4V
VOL
Digital Output Low Voltage
IOH = 1.6mA
q
0.4
V
Timing Characteristics
t1
DIN to CLK Setup Time
q
50
ns
t2
DIN to CLK Setup Hold Time
q
0ns
t3
CLK High Time
q
40
ns
t4
CLK Low Time
q
40
ns
t5
CS/LD High Time
q
50
ns
t6
LSB CLK to CS/LD
q
40
ns
t7
CS/LD Low to CLK High
q
20
ns
t8
CLK Low to CS/LD Low
q
20
ns
t9
CLK to DOUT Delay
q
10
160
ns
Power Supply
VCC
Operating Supply Range
q
4.5
5
5.5
V
ICC
Supply Current
Digital Inputs = 0V or VCC
q
10
A
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 en = √4KTRB where:
K = Boltzmann constant (J/K
°); R = resistance (); T = resistor temperature
(
°K); B = bandwidth (Hz).
Note10: VREF = 6VRMS at 1kHz. DAC register loaded with all 1s, using
LT
1124 op amp.
Note 11: VREF = ±10V, 10kHz sine wave, DAC register loaded with all 0s,
using LT1358 op amp.
Note 12: –3dB bandwidth using LT1358 op amp.
The q 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: IOUT1 with DAC register loaded with all 0s.
Note 5: OUT1 load = 100
in parallel with 13pF.
Note 6: VREF = 0V. DAC register contents changed from all 0s to all 1s or
all 1s to all 0s.
Note 7: DAC A output with VREF A = 0V and VREF B = 10kHz 20VP-P, or
DAC B output with VREF B = 0V, VREF A = 10kHz 20VP-P. Both DAC registers
loaded with all 1s.