MAX9938 Maxim, MAX9938 Datasheet - Page 3

• Manufacturer Part Number: MAX9938
• Description: The MAX9938 high-side current-sense amplifier offers precision accuracy specifications of VOS less than 500µV (max) and gain error less than 0
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
Note 1: All devices are 100% production tested at T
Note 2: V
Note 3: V
Note 4: Gain error is calculated by applying two values of V
Note 5: The device is stable for any external capacitance value.
Note 6: V
(V
RS+
RS+
-30
-35
-40
-45
-50
-55
30
25
20
15
10
5
0
= V
= V
0
-0.4 -0.3 -0.2 -0.1
INPUT OFFSET VOLTAGE HISTOGRAM
RS-
OUT
OS
OH
RS-
Gain = 25, V
Gain = 50, V
Gain = 100, V
Gain = 200, V
vs. COMMON-MODE VOLTAGE
= 3.6V, V
is extrapolated from measurements for the gain-error test.
5
is the voltage from V
= 3.6V, T
= 0. I
INPUT OFFSET VOLTAGE (mV)
SUPPLY VOLTAGE (V)
10
INPUT OFFSET
CC
_______________________________________________________________________________________
SENSE
A
is the total current into RS+ plus RS- pins.
15
0
SENSE
SENSE
= +25°C, unless otherwise noted.)
SENSE
SENSE
0.1
= (V
20
is 20mV and 120mV.
is 10mV and 60mV.
0.2 0.3
RS+
is 5mV and 30mV.
is 2.5mV and 15mV.
RS-
25
- V
to V
RS-
0.4
Precision Current-Sense Amplifier
30
OUT
) = 0V, T
with V
A
30
25
20
15
10
60
50
40
30
20
10
5
0
0
= -40°C to +85°C, unless otherwise noted. Typical values are at T
-40
SENSE
A
-0.4 -0.3 -0.2 -0.1
= +25°C. All temperature limits are guaranteed by design.
-15
= 3.6V/gain.
GAIN ERROR HISTOGRAM
1µA, 4-Bump UCSP/SOT23,
SENSE
vs. TEMPERATURE
TEMPERATURE (°C)
INPUT OFFSET
GAIN ERROR (%)
10
and calculating the error of the slope vs. the ideal:
0
Typical Operating Characteristics
35
0.1
0.2 0.3
60
0.4
85
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
-40
0
vs. COMMON-MODE VOLTAGE
5
-15
vs. TEMPERATURE
SUPPLY CURRENT
SUPPLY CURRENT
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
10
10
A
15
= +25°C.) (Note 1)
35
20
3.6V
1.8V
28V
60
25
85
30
3