Datasheet

LTC2654
5
2654f
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OUT
DAC Output Span Internal Reference
External Reference = V
EXTREF
0 to 2.5
0 to 2•V
EXTREF
V
V
PSR Power Supply Rejection V
CC
±10% –80 dB
R
OUT
DC Output Impedance V
CC
= 5V ±10%, Internal Reference,
Mid-Scale, –15mA ≤ I
OUT
≤ 15mA
V
CC
= 3V ±10%, Internal Reference,
Mid-Scale, –7.5mA ≤ I
OUT
≤ 7.5mA
l
l
0.04
0.04
0.15
0.15
Ω
Ω
DC Crosstalk Due to Full-Scale Output Change (Note 5)
Due to Load Current Change (Note 5)
Due to Powering Down (per Channel) (Note 5)
±1.5
±2
±1
µV
µV/mA
µV
I
SC
Short-Circuit Output Current V
CC
= 5.5V V
EXTREF
= 2.8V (Note 6)
Code: Zero-Scale; Forcing Output to V
CC
(Note 6)
Code: Full-Scale; Forcing Output to GND (Note 6)
l
l
20
20
65
65
mA
mA
V
CC
= 2.7V V
EXTREF
= 1.4V
Code: Zero-Scale; Forcing Output to V
CC
Code: Full-Scale; Forcing Output to GND
l
l
10
10
45
45
mA
mA
LTC2654B-L16/ LTC2654-L12 (Internal Reference = 1.25V)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference
Reference Output Voltage 1.248 1.25 1.252 V
Reference Temperature Coeffi cient (Note 7) ±2 ±10 ppm/°C
Reference Line Regulation V
CC
±10% –80 dB
Reference Short-Circuit Current V
CC
= 5.5V, Forcing Output to GND
l
35 mA
Refcomp Pin Short-Circuit Current V
CC
= 5.5V, Forcing Output to GND
l
60 200 µA
Reference Load Regulation V
CC
= 3V ±10% or 5V ±10%, I
OUT
= 100µA Sourcing 40 mV/mA
Reference Output Voltage Noise Density C
REFCOMP
= C
REFIN/OUT
= 0.1µF, at f = 1kHz 30 nV/√Hz
Reference Input Range External Reference Mode (Note 13)
l
0.5 V
CC
/2 V
Reference Input Current
l
0.001 1 µA
Reference Input Capacitance (Note 9)
l
20 pF
Power Supply
V
CC
Positive Supply Voltage For Specifi ed Performance
l
2.7 5.5 V
I
CC
Supply Current V
CC
= 5V, Internal Reference On (Note 8)
V
CC
= 5V, Internal Reference Off (Note 8)
V
CC
= 3V, Internal Reference On (Note 8)
V
CC
= 3V, Internal Reference Off (Note 8)
l
l
l
l
1.7
1.3
1.6
1.2
2.5
2
2.2
1.7
mA
mA
mA
mA
I
SD
Supply Current in Shutdown Mode V
CC
= 5V (Note 8)
l
3µA
Digital I/O
V
IH
Digital Input High Voltage V
CC
= 3.6V to 5.5V
V
CC
= 2.7V to 3.6V
l
l
2.4
2.0
V
V
V
IL
Digital Input Low Voltage V
CC
= 4.5V to 5.5V
V
CC
= 2.7V to 4.5V
l
l
0.8
0.6
V
V
V
OH
Digital Output High Voltage Load Current = –100µA
l
V
CC
– 0.4 V
V
OL
Digital Output Low Voltage Load Current = 100µA
l
0.4 V