Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s)
.................................
+300°C
Soldering Temperature (reflow)
.......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(V
RS+
= -0.1V to +28V, V
CC
= 3.3V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, R
OUT
= 10kΩ for MAX9928F, T
A
= -40°C to +125°C, unless oth-
erwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
-0.1
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
93
87
60
54
±50
50
T
A
= +25°C
T
A
= +25°C
T
A
= -40°C to +125°C
5
T
A
= +25°C
T
A
= +25°C
±0.3
±0.3
0
-80
±0.05
±0.2
0.05
1.6
±1.0
±2.5
±1.0
±2.8
6
+6
±1
±2
1.0
µA
µA
µA
%
T
A
= -40°C to +125°C
T
A
= -40°C to +125°C
±0.3
±0.3
±1.0
±2.5
±1.0
±2.8
µA/mV
%
T
A
= -40°C to +125°C
mV
V/V
72
104
dB
±0.6
MIN
TYP
±0.1
MAX
±0.4
±0.8
±1.0
±3.0
+28
V
mV
UNITS
AMPLIFIER DC ELECTRICAL CHARACTERISTICS
V
RS+
= 3.6V
Input Offset Voltage (Note 2)
V
OS
V
RS+
= -0.1V
Common-Mode Input Range
V
CMR
(Note 3)
2V ≤ V
RS+
≤ 28V
Common-Mode Rejection Ratio
CMRR
-0.1V ≤ V
RS+
≤
+2V
MAX992_F
MAX9929F
MAX9929F,
V
RS+
= 3.6V
MAX9929F,
V
RS+
= -0.1V
G
M
MAX9928F
MAX9928F,
V
RS+
= 3.6V
MAX9928F,
V
RS+
= -0.1V
I
RS+
, I
RS-
I
OS
I
RS+
, I
RS-
2V ≤ V
RS+
≤ 28V
-0.1V ≤ V
RS+
≤ +2V
2V ≤ V
RS+
≤ 28V
-0.1V ≤ V
RS+
≤ +2V
V
CC
= 0V, V
RS+
= V
RS-
= 28V (Note 5)
Full-Scale Sense Voltage (Note 2)
Gain (Note 2)
V
SENSE
A
V
Gain Accuracy (Notes 2, 6)
Transconductance (Note 2)
Transconductance Accuracy
(Note 2)
Input Bias Current (Note 4)
Input Offset Bias Current (Note 4)
Input Leakage Current
www.maximintegrated.com
Maxim Integrated │
2
MAX9928/MAX9929
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
Electrical Characteristics (continued)
(V
RS+
= -0.1V to +28V, V
CC
= 3.3V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, R
OUT
= 10kΩ for MAX9928F, T
A
= -40°C to +125°C, unless oth-
erwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Output Resistance
SYMBOL
R
OUT
MAX9928F
MAX9929F
MAX9928F, R
OUT
= 10kΩ
MAX9929F
MAX9929F
MAX9928F
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= +25°C
T
A
= +25°C
-0.1
2V ≤ V
RS+
≤ 28V
-0.1V ≤ V
RS+
≤ +2V
I
SINK
= 100µA
102
74
0.03
(V
CC
-
0.01)
1
0.1
(V
CC
-
0.04)
-1.6
-2.15
-2.5
-4.6
-1.8
-1.8
0.6
+28
-1.2
-1.2
0.025
6.4
CONDITIONS
MIN
TYP
5
10
(V
CC
-
0.1)
(V
CC
-
0.1)
0.25
13.6
(V
CC
-
0.45)
(V
CC
-
0.45)
2.0
15
0.2
1.5
-0.5
-0.15
+0.25
+2.3
mV
mV
V
dB
V
V
MΩ
mV
MAX
UNITS
MΩ
kΩ
V
Output High Voltage (Note 6)
V
OH
Minimum Output Voltage (Note 7)
Minimum Output Current (Note 7)
V
OL
I
OL
mV
µA
SIGN COMPARATOR DC ELECTRICAL CHARACTERISTICS
Discharge to Charge Trip Point
(Note 8)
V
RS+
= 3.6V
V
TDC
V
RS+
= -0.1V
V
TCD
V
HYS
V
CMR
CMRR
V
OL
V
OH
R
PULL-UP
T
A
= +25°C
T
A
= -40°C to +125°C
V
RS+
= 3.6V
V
RS+
= -0.1V
V
RS+
= 3.6V
V
RS+
= -0.1V
2V ≤ V
RS+
≤ 28V
-0.1V ≤ V
RS+
< +2V
2.5
2.8
72
66
90
86
90
86
20
115
30
200
V
RS+
= 3.6V
V
RS+
= -0.1V
V
RS+
= 3.6V, -0.1V
Charge to Discharge Trip Point
(Note 8)
Hysteresis Width
Common-Mode Input Range
(Note 9)
Common-Mode Rejection Ratio
(Note 9)
Output Low Voltage
Output High Voltage
Internal Pullup Resistor
POWER SUPPLY
Supply Voltage Range (Note 10)
Amplifier Power-Supply Rejection
Ratio (Note 10)
Comparator Power-Supply
Rejection Ratio
Quiescent Supply Current
V
CC
PSRR
A
PSRR
C
I
CC
5.5
5.5
V
dB
dB
µA
www.maximintegrated.com
Maxim Integrated │
3
MAX9928/MAX9929
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
Electrical Characteristics (continued)
(V
RS+
= -0.1V to +28V, V
CC
= 3.3V, V
SENSE
= (V
RS+
- V
RS-
) = 0V, R
OUT
= 10kΩ for MAX9928F, T
A
= -40°C to +125°C, unless oth-
erwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
-3dB Bandwidth
SYMBOL
BW
CONDITIONS
MAX992_F, V
SENSE
= 50mV
V
RS+
= 3.6V,
C
LOAD
= 10pF,
R
OUT
= 10kΩ for
MAX9928F
Overdrive = 1mV
Overdrive = 5mV
Overdrive = 1mV
Overdrive = 5mV
V
SENSE
= 50mV for MAX992_F,
V
RS+
= 3.6V, C
LOAD
= 10pF
100mV ≤ V
SENSE
P 50mV for MAX992_F,
V
RS+
= 3.6V, C
LOAD
= 10pF
MAX992_F, V
SENSE
=
5mV to 50mV step
MAX992_F, V
SENSE
=
50mV to 5mV step
MIN
TYP
150
6
µs
15
80
30
50
13
50
4
µs
µs
µs
ms
MAX
UNITS
kHz
AC ELECTRICAL CHARACTERISTICS
OUT Settling to 1% of Final Value
tSET
SIGN Comparator Propagation
Delay (Low to High)
SIGN Comparator Propagation
Delay (High to Low)
Power-Up Time to 1% of Final
Value
Saturation Recovery Time
Note 1:
Note 2:
t
PROP_LH
t
PROP_HL
Note
Note
Note
Note
Note
Note
Note
Note
All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
V
OS
is extrapolated from two point transconductance and gain accuracy tests. Measurements are made at V
SENSE
= +5mV
and V
SENSE
= +50mV for MAX992_F. These measurements are also used to test the full-scale sense voltage, transcon-
ductance, and gain. These V
OS
specifications are for the trimmed direction only (V
RS+
> V
RS-
). For current flowing in the
opposite direction (V
RS-
> V
RS+
), V
OS
is ±1mV (max) at +25°C and ±1.8mV (max) over temperature, when V
RS+
is at 3.6V.
See the
Detailed Description
for more information.
3:
Guaranteed by common-mode rejection ratio. Extrapolated V
OS
as described in Note 2 is used to calculate common-mode
rejection ratio.
4:
Includes input bias current of SIGN comparator.
5:
Leakage in to RS+ or RS- when V
CC
= 0V. Includes input leakage current of SIGN comparator. This specification does not
add to the bias current.
6:
Output voltage should be 650mV below V
CC
to achieve full accuracy.
7:
I
OL
is the minimum output current in the V
SENSE
- I
OUT
transfer characteristics. V
OL
is the minimum output voltage in the
V
SENSE
- V
OUT
transfer characteristic.
8:
V
SENSE
voltage required to switch comparator.
9:
Discharge to charge trip point is functionally tested at V
CM
= -0.1V, +3.6V, and +28V.
10:
Guaranteed by PSRR test. Extrapolated V
OS
as described in Note 2 is used to calculate the power-supply rejection ratio.
V
SENSE
has to be such that the output voltage is 650mV below V
白光LED光衰原因之荧光粉性能的衰退 到目前，白光 LED、尤其是小功率白光 LED 的发光性能快速衰退已越来越为人们所认识。其实，盲目地夸大宣传，只能将 LED 行业引向歧途，不正视白光 LED 存在的问题，只能延缓白光 LED 应用的发展。只有正视问题、研究问题、尽早解决问题，白光 LED 才能健康、快速发展。 白光 LED 当前面临的一个主要问题就寿命问题。由于白光 LED 的价格尚很...[详细]
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