Operating Temperature Range ........................... -40°C to +85°C
Storage Temperature Range ............................ -65°C to +150°C
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—MAX6279_12 (1.225V)
PARAMETER
Reverse Breakdown Voltage
(Note 2)
Minimum Operating Current
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
Reverse Breakdown Voltage
Change with Operating
Current Change
Reverse Dynamic
Impedance (Note 3)
Wideband Noise
Reverse Breakdown Voltage
SYMBOL
V
R
I
RMIN
TC
I
RMIN
≤ I
R
≤ 1mA
1mA ≤ I
R
≤ 12mA
T
A
= +25°C
CONDITIONS
(I
R
= 100μA, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
MIN
1.22377
TYP
1.225
45
4
0.3
2.5
0.3
20
30
MAX
1.22623
70
25
1.0
13.0
UNITS
V
µA
ppm/°C
MAX6279A (0.1%)
∆V
R
/∆I
R
Z
R
e
N
∆V
R
mV
Ω
µV
RMS
ppm
I
R
= 1mA, f = 120Hz, I
AC
= 0.1I
R
I
R
= 10µA, 10Hz ≤ f ≤ 10kHz
t = 1000h
Note 1:
All devices are 100% production tested at +25°C and are guaranteed by correlation for T
A
= T
MAX
to T
MIN
, as specified.
Note 2:
TC is measured by the “box” method, i.e. (V
MAX
- V
MIN
) / (T
MAX
- T
MIN
)
Note 3:
Guaranteed by design.
www.maximintegrated.com
Maxim Integrated
│
2
MAX6279
0.1%, 25ppm, Ceramic Shunt
Voltage Reference
Typical Operating Characteristics
(I
R
= 100μA, T
A
= +25°C, unless otherwise noted.)
REVERSE CHARACTERISTICS AND
MINIMUM OPERATING CURRENT
toc01
1.6
1.4
REVERSE VOLTAGE (V)
1.2
1
0.8
0.6
0.4
0.2
0
0
MAX6279_12 OUTPUT
VOLTAGE LONG-TERM DRIFT
140
120
100
80
60
40
20
0
-20
-40
-60
-80
-100
-120
-140
0
5 TYPICAL UNITS
toc03
MAX6279_12+
20
40
60
80
100
OUTPUT VOLTAGE CHANGE (ppm)
500
REVERSE CURRENT (µA)
1000
1500
DURATION (HOURS)
2000
REVERSE VOLTAGE CHANGE (mV)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
5
10
I
SHUNT
(mA)
15
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
MAX6279 toc04
5.0
MAX6279_12
REVERSE VOLTAGE vs. I
SHUNT
MAX6279_12
LOAD-TRANSIENT RESPONSE
MAX6279 toc05
+25µA
-25µA
V
R
AC-COUPLED
10mV/div
20
4µs/div
I
SHUNT
= 100µA ±25A
R
L
= 48kΩ
MAX6279_12
LOAD-TRANSIENT RESPONSE
MAX6279 toc06
MAX6279_12
LOAD-TRANSIENT RESPONSE
+250µA
MAX6279 toc07
+2.5mA
-250µA
-2.5mA
V
R
AC-COUPLED
2.0mV/div
V
R
AC-COUPLED
100mV/div
10µs/div
I
SHUNT
= 1mA
R
L
= 10kΩ
10µs/div
I
SHUNT
= 10mA
R
L
= 1kΩ
www.maximintegrated.com
Maxim Integrated
│
3
MAX6279
0.1%, 25ppm, Ceramic Shunt
Voltage Reference
Typical Operating Characteristics (continued)
(I
R
= 100μA, T
A
= +25°C, unless otherwise noted.)
MAX6279_12
STARTUP CHARACTERISTICS
MAX6279_12
OUTPUT IMPEDANCE
vs. FREQUENCY
C
L
= 0
MAX6279 toc09
MAX6279 toc08
5V
V
IN
1000
100
IMPEDANCE (Ω)
0
10
1.2V
I
R
=150µA
1
V
OUT
200ns/div
I
SHUNT
= 100µA
R
S
= 30kΩ
0
0.1
I
R
= 1mA
100
1k
10k
C
L
= 1µF
100k
1M
FREQUENCY (Hz)
NOISE (nV√Hz)
1000
100
1
10
100
FREQUENCY (Hz)
1k
10k
I
SHUNT
+ I
LOAD
1kΩ
V
R
R
L
V
IN
1Hz RATE
50%
DUTY CYCLE
R
S
V
B
+
-
MAX6279 toc10
10,000
MAX6279_12
NOISE vs. FREQUENCY
V
R
V
GEN
Figure 1. Load-Transient Circuit
Figure 2. Startup Characteristics Test Circuit
www.maximintegrated.com
Maxim Integrated
│
4
MAX6279
0.1%, 25ppm, Ceramic Shunt
Voltage Reference
Pin Configuration
TOP VIEW
1
8
GND
N.C.
7
+
I.C.
N.C.
N.C.
2
MAX6279
4
6
VREF
3
5
N.C.
LCC
3mm
x
3mm
Pin Description
PIN
6
4, 8
2
1, 3, 5, 6
NAME
V
REF
GND
I.C.
N.C.
FUNCTION
Positive Terminal of the Shunt Reference
Negative Terminal of the Shunt Reference
No Connection. Leave this pin unconnected or connect to GND.
在LPC2103上移植的UCOS II ，为什么下载至RAM时会出现下面的问题：
Fatal Error: Segment FIQ_STACK must be defined in a segment definition option (-Z, -b or -P)
但是下载到flash时完全 ......
实时操作系统RTOS
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