LTC2640
The l denotes the specifications which apply over the full operating
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, VOUT unloaded unless otherwise specified.
LTC2640-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8, LTC2640A-LM12/-LZ12 (VFS = 2.5V)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Input
l
l
Input Voltage Range
Resistance
0
V
V
kΩ
pF
CC
160
190
7.5
220
Capacitance
l
l
I
Reference Current, Power-Down Mode
DAC Powered Down
0.005
0.1
µA
REF
Reference Output
Output Voltage
1.240
1.250
10
1.260
V
ppm/°C
kΩ
Reference Temperature Coefficient
Output Impedance
0.5
10
Capacitive Load Driving
Short-Circuit Current
µF
V
CC
= 5.5V; REF Shorted to GND
2.5
mA
Digital I/O
l
l
V
Digital Input High Voltage
Digital Input Low Voltage
V
V
= 3.6V to 5.5V
= 2.7V to 3.6V
2.4
2
V
V
IH
CC
CC
l
l
V
V
CC
V
CC
= 4.5V to 5.5V
= 2.7V to 4.5V
0.8
0.6
V
V
IL
l
l
I
Digital Input Leakage
V
= GND to V
CC
1
µA
pF
LK
IN
C
Digital Input Capacitance
(Note 7)
2.5
IN
AC Performance
t
Settling Time
V
= 3V (Note 8)
S
CC
0.39% ( 1LSB at 8-Bits)
0.098% ( 1LSB at 10-Bits)
0.024% ( 1LSB at 12-Bits)
3.2
3.8
4.1
µs
µs
µs
Voltage Output Slew Rate
Capacitance Load Driving
Glitch Impulse
1
V/µs
pF
500
2.1
300
At Mid-Scale Transition
External Reference
nV•s
kHz
Multiplying Bandwidth
Output Voltage Noise Density
e
At f = 1kHz, External Reference
At f = 10kHz, External Reference
At f = 1kHz, Internal Reference
At f = 10kHz, Internal Reference
140
130
160
150
nV√Hz
nV√Hz
nV√Hz
nV√Hz
n
Output Voltage Noise
0.1Hz to 10Hz, External Reference
0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, External Reference
0.1Hz to 200kHz, Internal Reference,
20
20
650
670
µV
P-P
µV
P-P
µV
P-P
µV
P-P
C
= 0.33µF
REF
2640fd
6
For more information www.linear.com/LTC2640
Linear [ Linear ]
