Datasheet

LTC2654
7
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
= 4.5V to 5.5V, V
OUT
unloaded unless otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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
LTC2654B-H16/ LTC2654-H12 (Internal Reference = 2.048V)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Reference
Reference Output Voltage 2.044 2.048 2.052 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
= 5V ±10%, I
OUT
= 100µA Sourcing 40 mV/mA
Reference Output Voltage Noise Density C
REFCOMP
= C
REFIN/OUT
= 0.1µF, at f = 1kHz 35 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
4.5 5.5 V
I
CC
Supply Current V
CC
= 5V, Internal Reference On (Note 8)
V
CC
= 5V, Internal Reference Off (Note 8)
l
l
1.9
1.5
2.5
2
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
= 4.5V to 5.6V
l
2.4 V
V
IL
Digital Input Low Voltage V
CC
= 4.5V to 5.5V
l
0.8 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
I
LK
Digital Input Leakage V
IN
= GND to V
CC
l
±1 µA
C
IN
Digital Input Capacitance (Note 9)
l
8pF
AC Performance
t
S
Settling Time ±0.024% (±1LSB at 12 Bits) (Note 10)
±0.0015% (±1LSB at 16 Bits) (Note 10)
4.6
7.9
µs
µs
Settling Time for 1LSB Step ±0.024% (±1LSB at 12 Bits)
±0.0015% (±1LSB at 16 Bits)
2.0
3.8
µs
µs
Voltage Output Slew Rate 1.8 V/µs
Capacitive Load Driving 1000 pF
Glitch Impulse At Mid-Scale Transition (Note 11) 6 nV•s
DAC-to-DAC Crosstalk Due to Full-Scale Output Change (Note 12) 3 nV•s
Multiplying Bandwidth 150 kHz