Datasheet

LTC2656
6
2656fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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
40 pF
Power Supply
V
CC
Positive Supply Voltage For Specified Performance
l
2.7 5.5 V
I
CC
Supply Current (Note 8) V
CC
= 5V, Internal Reference On
V
CC
= 5V, Internal Reference Off
V
CC
= 3V, Internal Reference On
V
CC
= 3V, Internal Reference Off
l
l
l
l
3.1
2.7
3.0
2.6
4.25
3.7
3.8
3.2
mA
mA
mA
mA
I
SHDN
Supply Current in Shutdown Mode
(Note 8)
V
CC
= 5V
l
3 µA
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
I
LK
Digital Input Leakage V
IN
= GND to V
CC
l
±1 µA
C
IN
Digital Input Capacitance (Note 9)
l
8 pF
AC Performance
t
S
Settling Time (Note 10) ±0.024% (±1LSB at 12 Bits)
±0.0015% (±1LSB at 16 Bits)
4.2
8.9
µs
µs
Settling Time for 1LSB Step ±0.024% (±1LSB at 12 Bits)
±0.0015% (±1LSB at 16 Bits)
2.2
4.9
µs
µs
Voltage Output Slew Rate 1.8 V/µs
Capacitive Load Driving 1000 pF
Glitch Impulse (Note 11) At Mid-Scale Transition, V
CC
= 3V 3 nV•s
DAC-to-DAC Crosstalk (Note 12) Due to Full-Scale Output Change,
C
REFCOMP
= C
REFOUT
= No Load
2 nV•s
Multiplying Bandwidth 150 kHz
e
n
Output Voltage Noise Density At f = 1kHz
At f = 10kHz
85
80
nV/√Hz
nV/√Hz
Output Voltage Noise 0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, Internal Reference
8
600
µV
P-P
µV
P-P
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specified.
LTC2656B-L16/LTC2656C-L16/LTC2656-L12 (internal reference = 1.25V)