3
LTC1654
1654fb
The
● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at TA = 25°C. Unless otherwise noted, VCC = 2.7V to 5.5V, VOUT A, VOUT B unloaded, REFHI A,
REFHI B = 4.096V (VCC = 5V), REFHI A, REFHI B = 2.048V (VCC = 2.7V), REFLO = 0V, X1/X1/2 = 0V.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
AC Performance
Voltage Output Slew Rate
(Note 8) SLOW
●
0.20
0.9
V/
s
(Note 8) FAST
●
1.25
3.8
V/
s
Voltage Output Settling Time
(Note 4) to
±1LSB, SLOW
8.5
s
(Note 4) to
±1LSB, FAST
3.0
s
Digital Feedthrough
(Note 7)
1
nVs
Midscale Glitch Impulse
DAC Switch Between 8000 and 7FFF
20
nVs
Output Noise Voltage Density
at 10kHz, SLOW
170
nV/
√Hz
at 10kHz, FAST
150
nV/
√Hz
Digital I/O
VIH
Digital Input High Voltage
VCC = 5V
●
2.4
V
VIL
Digital Input Low Voltage
VCC = 5V
●
0.8
V
VOH
Digital Output High Voltage
VCC = 5V, IOUT = – 1mA, DOUT Only
●
VCC – 0.4
V
VOL
Digital Output Low Voltage
VCC = 5V, IOUT = 1mA, DOUT Only
●
0.4
V
VIH
Digital Input High Voltage
VCC = 3V
●
2.4
V
VIL
Digital Input Low Voltage
VCC = 3V
●
0.8
V
VOH
Digital Output High Voltage
VCC = 3V, IOUT = – 1mA, DOUT Only
●
VCC – 0.4
V
VOL
Digital Output Low Voltage
VCC = 3V, IOUT = 1mA, DOUT Only
●
0.4
V
ILEAK
Digital Input Leakage
VIN = GND to VCC
●
±10
A
CIN
Digital Input Capacitance
(Note 6)
10
pF
Reference Input
Reference Input Resistance
REFHI to REFLO
●
30
60
k
Reference Input Range
(Note 6)
●
0VCC
V
Reference Input Current
In Shutdown
●
1
A
Switching Characteristics (VCC = 4.5V to 5.5V)
t1
SDI Valid to SCK Setup
●
30
ns
t2
SDI Valid to SCK Hold
(Note 6)
●
0ns
t3
SCK High Time
(Note 6)
●
15
ns
t4
SCK Low Time
(Note 6)
●
15
ns
t5
CS/LD Pulse Width
(Note 6)
●
15
ns
t6
LSB SCK to CS/LD
(Note 6)
●
10
ns
t7
CS/LD Low to SCK
(Note 6)
●
10
ns
t8
SD0 Output Delay
CLOAD = 100pF
●
5
100
ns
t9
SCK Low to CS/LD Low
(Note 6)
●
10
ns
t10
CLR Pulse Width
(Note 6)
●
30
ns
Switching Characteristics (VCC = 2.7V to 5.5V)
t1
SDI Valid to SCK Setup
●
45
ns
t2
SDI Valid to SCK Hold
(Note 6)
●
0ns
t3
SCK High Time
(Note 6)
●
20
ns
t4
SCK Low Time
(Note 6)
●
20
ns
t5
CS/LD Pulse Width
(Note 6)
●
20
ns
t6
LSB SCK to CS/LD
(Note 6)
●
15
ns
t7
CS/LD Low to SCK
(Note 6)
●
15
ns