Datasheet
6
LTC1091/LTC1092
LTC1093/LTC1094
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
LTC1091/LTC1092/LTC1093/LTC1094
Maximum Clock Rate vs
Source Resistance
LTC1091/LTC1092/LTC1093/LTC1094
Maximum Filter Resistor vs
Cycle Time
LTC1091/LTC1092/LTC1093/LTC1094
Sample-and-Hold Acquisition Time
vs Source Resistance
R
SOURCE
(Ω)
10
MAXIMUM CLK FREQUENCY
†
(MHz)
1.25
1.00
0.75
0.50
0.25
0
100 1k 10k
1091/2/3/4 G10
V
CC
= 5V
T
A
= 25°C
“+” OR “–”
INPUT
V
IN
R
SOURCE
CYCLE TIME (µs)
100
MAXIMUM R
FILTER
††
(Ω)
1k
10k
100k
10 1000 10000
1091/2/3/4 G11
10
100
+
–
V
IN
C
FILTER
≥1
µ
F
R
FILTER
R
SOURCE
+
(Ω)
100 1k 10k
1091/2/3/4 G12
0.1
S & H ACQUISITION TIME TO 0.1% (µs)
1
10
+
–
V
IN
R
SOURCE
+
V
CC
= 5V
T
A
= 25°C
0V TO 5V INPUT STEP
LTC1091 Change in Full-Scale
Error vs Supply Voltage
AMBIENT TEMPERATURE (°C)
–50
INPUT CHANNEL LEAKAGE CURRENT (nA)
100
80
60
40
20
0
50
1091/2/3/4 G13
–25
0
25
75
125100
ON-CHANNEL OR
OFF-CHANNEL
SUPPLY VOLTAGE (V)
4
OFFSET ERROR [LSB = • V
CC
(V
REF
)]
1.25
1.00
0.75
0.5
0.25
0
5
678
1091/2/3/4 G14
910
f
CLK
= 500kHz
T
A
= 25°C
V
OS
= 0.85mV AT V
CC
(V
REF
) = 5V
1
1024
SUPPLY VOLTAGE (V)
4
LINEARITY ERROR [LSB = • V
CC
(V
REF
)]
1.25
1.00
0.75
0.5
0.25
0
5
678
1091/2/3/4 G15
910
f
CLK
= 500kHz
T
A
= 25°C
1
1024
LTC1091/LTC1092 Input Channel
Leakage Current vs Temperature
LTC1091 Offset Error vs
Supply Voltage
LTC1091 Linearity Error vs
Supply Voltage
SUPPLY VOLTAGE (V)
4
CHANGE IN FULL-SCALE ERROR
[LSB = • V
CC
(V
REF
)]
0.50
0.25
0
–0.25
–0.50
–0.75
5
678
1091/2/3/4 G16
910
f
CLK
= 500kHz
T
A
= 25°C
1
1024
AMBIENT TEMPERATURE (°C)
–50
SUPPLY CURRENT (mA)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
50
1091/2/3/4 G18
–25
0
25
75
125100
f
CLK
= 500kHz
V
CC
(V
REF
) = 5V
CS = 5V
LTC1091 Supply Current vs
Temperature
†
AS THE CLK FREQUENCY AND SOURCE RESISTANCE ARE INCREASED, MAXIMUM CLK
FREQUENCY (∆ERROR ≤ 0.1LSB) REPRESENTS THE FREQUENCY AT WHICH A 0.1LSB
SHIFT IN ANY CODE TRANSITION FROM ITS 500kHz, 0Ω VALUE IS FIRST DETECTED.
††
MAXIMUM R
FILTER
REPRESENTS THE FILTER RESISTOR VALUE AT WHICH A 0.1LSB
CHANGE IN FULL-SCALE ERROR FROM ITS VALUE AT R
FILTER
= 0 IS FIRST DETECTED.
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
7
6
5
4
3
2
1
0
1092/2/3/4 G17
4
5
678910
f
CLK
= 500kHz
CS = V
CC
(V
REF
)
T
A
= 25°C
LTC1091 Supply Current vs
Supply Voltage