Datasheet

LTC2655
13
2655f
TYPICAL PERFORMANCE CHARACTERISTICS
Current Limiting
Headroom at Rails
vs Output Current
Offset Error vs Temperature
Integral Nonlinearity (INL)
Differential Nonlinearity (INL)
Settling to ±1LSB Falling
Load Regulation
CODE
8
INL (LSB)
1.0
–0.5
0.5
0
–1.0
2048 30721024
2655 G15
4095
V
CC
= 5V
V
REF
= 2.048V
CODE
8
DNL (LSB)
1.0
–0.5
0.5
0
–1.0
2048 30721024
2655 G16
4095
V
CC
= 3V
V
REF
= 1.25V
2µs/DIV
V
OUT
1mV/DIV
SCL
3V/DIV
2655 G17
4.0µs
3/4 TO 1/4 SCALE STEP
V
CC
= 3V, V
FS
= 2.5V
R
L
= 2k, C
L
= 200pF
AVERAGE OF 2048 EVENTS
I
OUT
(mA)
–50
$V
OUT
(mV)
10
–6
–8
–4
–2
8
6
4
2
0
–10
0–10–20 30 402010–40 –30
2655 G18
50
INTERNAL REF
CODE = MID-SCALE
V
CC
= 5V (LTC2655-H)
V
CC
= 3V (LTC2655-L)
I
OUT
(mA)
–50
∆V
OUT
(V)
0.20
–0.10
–0.15
–0.05
0.15
0.10
0.05
0
–0.20
0–10–20 30 402010–40 –30
2655 G19
50
INTERNAL REF
CODE = MID-SCALE
V
CC
= 5V (LTC2655-H)
V
CC
= 3V (LTC2655-L)
I
OUT
(mA)
0
V
OUT
(V)
5.0
1.0
0.5
1.5
2.0
4.5
4.0
3.5
3.0
2.5
0
543897612
2655 G20
10
5V (LTC2655-H) SOURCING
3V (LTC2655-L) SOURCING
5V (LTC2655-H) SINKING
3V (LTC2655-L) SINKING
TEMPERATURE (°C)
–50
OFFSET ERROR (mV)
3
–2
–1
2
1
0
–3
503010 1109070–30 –10
2655 G21
130
T
A
= 25°C unless otherwise noted.
LTC2655-12
LTC2655
Zero-Scale Error vs Temperature Gain Error vs Temperature
TEMPERATURE (°C)
–50
ZERO-SCALE ERROR (mV)
3.0
2.0
0.5
2.5
1.5
1.0
0
503010 1109070–30 –10
2655 G22
130
TEMPERATURE (°C)
–50
GAIN ERROR (LSB)
64
32
16
–48
48
0
–32
–16
–64
503010 1109070–30 –10
2655 G23
130
LTC2655-16