Datasheet

LTC2640
13
2640fc
For more information www.linear.com/LTC2640
typical perFormance characteristics
LTC2640
Large-Signal Response
Mid-Scale-Glitch Impulse
Power-On Reset Glitch
Headroom at Rails
vs Output Current
Exiting Power-Down to Mid-Scale
Supply Current vs Logic Voltage
Hardware CLR
2µs/DIV
V
OUT
0.5V/DIV
2640 G26
V
FS
= V
CC
= 5V
1/4 SCALE TO 3/4 SCALE
2µs/DIV
LTC2640-H12, V
CC
= 5V:
3.0nV-s TYP
LTC2640-L12, V
CC
= 3V:
2.1nV-s TYP
V
OUT
5mV/DIV
2640 G27
CS/LD
5V/DIV
200µs/DIV
V
CC
2V/DIV
2640 G28
LTC2640-L
V
OUT
2mV/DIV
ZERO-SCALE
I
OUT
(mA)
0 1 2 3 4 5 6 7 8 9 10
V
OUT
(V)
2.5
2.0
3.5
3.0
4.0
2640 G29
1.5
1.0
0.5
0
5.0
4.5
5V SOURCING
3V (LTC2640-L) SOURCING
3V (LTC2640-L) SINKING
5V SINKING
4µs/DIV
2640 G30
LTC2640-H
CS/LD
2V/DIV
V
OUT
0.5V/DIV
LOGIC VOLTAGE (V)
0
I
CC
(mA)
1.4
1.2
0.8
0.4
1.0
0.6
0.2
0.0
42
2640 G31
531
V
CC
= 5V
V
CC
= 3V
(LTC2640-L)
SWEEP SCK, SDI, CS/LD
AND CLR BETWEEN
0V AND V
CC
1µs/DIV
2640 G32
LTC2640-LZ
V
OUT
1V/DIV
CLR
5V/DIV
Gain Error vs V
CC
Gain Error vs Temperature
V
CC
(V)
2.5 3 3.5 4 4.5 5 5.5
GAIN ERROR (%FSR)
0.1
0.2
0.3
2640 G24
0.0
–0.3
–0.2
–0.1
–0.4
0.4
EXTERNAL REF.
V
REF
= 2.5V
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125 150
GAIN ERROR (%FSR)
0.1
0.2
0.3
2640 G25
0.0
–0.3
–0.2
–0.1
–0.4
0.4
EXTERNAL REF.
V
REF
= 2.5V
T
A
= 25°C, unless otherwise noted.