LTC1657L Ver la hoja de datos (PDF) - Linear Technology
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LTC1657L Datasheet PDF : 12 Pages
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LTC1657L
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded, REFOUT tied to REFHI,
REFLO tied to GND, X1/X2 tied to GND, unless otherwise noted.
SYMBOL PARAMETER
AC Performance
Voltage Output Slew Rate
Voltage Output Settling Time
Digital Feedthrough
CONDITIONS
(Note 5)
(Note 5) to 0.0015% (16-Bit Settling Time)
(Note 5) to 0.012% (13-Bit Settling Time)
MIN TYP MAX
q
±0.3 ±0.7
20
10
0.3
UNITS
V/µs
µs
µs
nV•s
Midscale Glitch Impulse
Output Voltage Noise
Spectral Density
DAC Switch Between 8000H and 7FFFH
At 1kHz
8
nV•s
200
nV/√Hz
Digital I/O (VCC = 3V)
VIH
Digital Input High Voltage
VIL
Digital Input Low Voltage
ILEAK
Digital Input Leakage
CIN
Digital Input Capacitance
Switching Characteristics (VCC = 3V)
tCS
CS (MSB or LSB) Pulse Width
tWR
WR Pulse Width
tCWS
CS to WR Setup
tCWH
CS to WR Hold
tDWS
Data Valid to WR Setup
tDWH
Data Valid to WR Hold
tLDAC
LDAC Pulse Width
tCLR
CLR Pulse Width
Reference Output (REFOUT)
Reference Output Voltage
Reference Output
Temperature Coefficient
Reference Line Regulation
Reference Load Regulation
Short-Circuit Current
Reference Input
REFHI, REFLO Input Range
REFHI Input Resistance
VIN = GND to VCC
(Note 6)
VCC = 2.7V to 5.5V
Measured at IOUT = 100µA
REFOUT Shorted to GND
(Note 6) See Applications Information
X1/X2 Tied to VOUT
X1/X2 Tied to GND
q
2.0
q
0.6
q
± 10
10
q
60
q
60
q
0
q
0
q
60
q
0
q
60
q
60
q
1.24 1.25 1.26
15
q
±1
q
3
q
50
100
V
V
µA
pF
ns
ns
ns
ns
ns
ns
ns
ns
V
ppm/°C
mV/V
mV/A
mA
q
0
q
0
VCC – 1.5
V
VCC/2
q
16
23
kΩ
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: External reference REFHI = 1.3V, VCC = 3V
Note 3: Nonlinearity is defined from code 128 to code 65535 (full scale).
See Applications Information.
Note 4: Digital inputs at 0V or VCC.
Note 5: DAC switched between all 1s all 0s, slew rate is measured from
0.8V to 2V. VCC =3V.
Note 6: Guaranteed by design. Not subject to test.
3
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