Datasheet

LTC1250
3
1250fb
LTC1250M LTC1250C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
f
S
Internal Sampling Frequency T
A
= 25°C 4.75 4.75 kHz
V
OS
Input Offset Voltage T
A
= 25°C (Note 2) ±2 ±5 ±2 ±5 µV
∆V
OS
Average Input Offset Drift (Note 2) ● ±0.01 ±0.05 ±0.01 ±0.05 µV/°C
e
n
Input Noise Voltage (Note 3) T
A
= 25°C, 0.1Hz to 10Hz 1.0 1.0 µV
P-P
T
A
= 25°C, 0.1Hz to 1Hz 0.3 0.3 µV
P-P
I
B
Input Bias Current T
A
= 25°C (Note 4) ±20 ±100 ±20 ±100 pA
I
OS
Input Offset Current T
A
= 25°C (Note 4) ±40 ±200 ±40 ±200 pA
Maximum Output Voltage Swing R
L
= 1k 4.0 4.3 4.0 4.3 V
R
L
= 100k 4.95 4.95 V
I
S
Supply Current T
A
= 25°C 1.8 2.5 1.8 2.5 mA
f
S
Sampling Frequency T
A
= 25°C 3 3 kHz
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
4
2
SAMPLING FREQUENCY (kHz)
3
4
68
10
12
1250 G03
5
6
14
16
T
A
= 25°C
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
4
0
SUPPLY CURRENT (mA)
0.5
1.0
1.5
2.0
68
10
12
1250 G02
2.5
3.0
3.5
4.0
14
16
T
A
= 25°C
TOTAL SUPPLY VOLTAGE, V
+
TO V
–
(V)
4
0
INPUT NOISE (µV
P-P
)
0.2
0.4
0.6
0.8
68
10
12
1250 G01
1.0
1.2
1.4
1.6
14
16
T
A
= 25°C
0.1Hz TO 10Hz
0.1Hz TO 1Hz
Sampling Frequency vs Supply
Voltage
Supply Current vs Supply Voltage
Input Noise vs Supply Voltage
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels during automated testing.
Note 3: 0.1Hz to 10Hz noise is specified DC coupled in a 10s window;
0.1Hz to 1Hz noise is specified in a 100s window with an RC high-pass
filter at 0.1Hz. The LTC1250 is sample tested for noise; for 100% tested
parts contact LTC Marketing Dept.
Note 4: At T ≤ 0°C these parameters are guaranteed by design and not
tested.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, V
IN
= ±5V, otherwise specifications are at T
A