Datasheet

LTC2657
12
2657f
I
OUT
(mA)
–50
∆V
OUT
(mV)
2
6
10
30
2657 G22
–4
0
4
8
–2
–6
–8
–10
–30–40
–10–20
10 20 40
0
50
V
CC
= 5V (LTC2657-H)
V
CC
= 3V (LTC2657-L)
INTERNAL REF.
CODE = MID-SCALE
I
OUT
(mA)
–50
∆V
OUT
(V)
0
0.10
0.20
30
2657 G23
–0.10
–0.05
0.05
0.15
–0.15
–0.20
–30–40
–10–20
10 20 40
0
50
V
CC
= 5V (LTC2657-H)
V
CC
= 3V (LTC2657-L)
INTERNAL REF.
CODE = MID-SCALE
I
OUT
(mA)
0
V
OUT
(V)
3.0
4.0
5.0
8
2657 G24
2.0
1.0
2.5
3.5
4.5
1.5
0.5
0
21
43
67 9
5
10
5V SOURCING
5V
SINKING
3V SOURCING
(LTC2657-L)
3V SINKING
(LTC2657-L)
Load Regulation Current Limiting
Headroom at Rails
vs Output Current
Offset Error vs Temperature Zero-Scale Error vs Temperature Gain Eror vs Temperature
Integral Nonlinearity (INL) Differential Nonlinearity (DNL) Settling to ±1LSB
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2657-12, T
A
= 25°C unless otherwise noted.
CODE
8
–1
INL(LSB)
0.5
0
–0.5
1
40951024 2048
2657 G19
3072
V
CC
= 5V
V
REF
= 2.048V
CODE
8
–1
DNL(LSB)
0.5
0
–0.5
1
40951024 2048
2657 G20
3072
V
CC
= 5V
V
REF
= 2.048V
2µs/DIV
2657 G21
V
OUT
500µV/DIV
SCL
3V/DIV
3.5µs
9TH CLOCK OF
3RD DATA BYTE
3/4 SCALE TO 1/4 SCALE STEP
V
CC
= 3V, V
FS
= 2.5V
R
L
= 2k, C
L
= 200pF
AVERAGE OF 2048 EVENTS
TEMPERATURE (°C)
–50
–1
OFFSET ERROR (mV)
0.75
0.25
0.5
0
–0.25
–0.5
–0.75
1
–30 70 90 110 130–10 10 30
2657 G25
50
TEMPERATURE (°C)
–50
0
ZERO-SCALE ERROR (mV)
2
2.5
1.5
1
0.5
3
–30 70 90 110 130–10 10 30
2657 G26
50
TEMPERATURE (°C)
–50
–64
GAIN ERROR (LSB)
48
32
16
0
–16
–32
–48
64
–30 70 90 110 130–10 10 30
2657 G27
50
LTC2657