參數資料
型號: MSP430P315S
廠商: Texas Instruments, Inc.
英文描述: MIXED SIGNAL MICROCONTROLLERS
中文描述: 混合信號微處理器
文件頁數: 39/70頁
文件大小: 1176K
代理商: MSP430P315S
SLAS368D
OCTOBER 2002
REVISED MARCH 2005
39
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
12-bit ADC, built-in reference
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
UNIT
Positive built-in reference
voltage output
REF2_5V = 1 for 2.5 V
I
VREF+
max
I
VREF+
I
VREF+
min
REF2_5V = 0 for 1.5 V
I
VREF+
max
I
VREF+
I
VREF+
min
REF2_5V = 0, I
VREF+
max
I
VREF+
I
VREF+
min
REF2_5V = 1,
0.5mA
I
VREF+
I
VREF+
min
REF2_5V = 1,
1mA
I
VREF+
I
VREF+
min
3 V
2.4
2.5
2.6
V
REF+
2.2 V/3 V
1.44
1.5
1.56
V
2.2
AV
CC(min)
AV
CC
minimum voltage,
Positive built-in reference
active
2.8
V
2.9
Load current out of V
REF+
terminal
2.2 V
0.01
0.5
I
VREF+
3 V
0.01
1
mA
I
VREF+
= 500
μ
A +/
100
μ
A
Analog input voltage ~0.75 V;
REF2_5V = 0
I
VREF+
= 500
μ
A
±
100
μ
A
Analog input voltage ~1.25 V;
REF2_5V = 1
2.2 V
±
2
Load-current regulation
V
REF+
terminal
3 V
±
2
LSB
I
L(VREF)+
3 V
±
2
LSB
Load current regulation
V
REF+
terminal
I
VREF+
=100
μ
A
900
μ
A,
C
VREF+
=5
μ
F, ax ~0.5 x V
REF+
Error of conversion result
1 LSB
REFON =1,
0 mA
I
VREF+
I
VREF+
max
I
VREF+
is a constant in the range of
0 mA
I
VREF+
1 mA
I
DL(VREF) +
3 V
20
ns
C
VREF+
Capacitance at pin V
REF+
(see Note 1)
2.2 V/3 V
5
10
μ
F
T
REF+
Temperature coefficient of
built-in reference
2.2 V/3 V
±
100
ppm/
°
C
t
REFON
Settle time of internal
reference voltage (see
Figure 16 and Note 2)
I
VREF+
= 0.5 mA, C
VREF+
= 10
μ
F,
V
REF+
= 1.5 V, V
AVCC
= 2.2 V
17
ms
Not production tested, limits characterized
Not production tested, limits verified by design
NOTES:
1. The internal buffer operational amplifier and the accuracy specifications require an external capacitor. All INL and DNL tests uses
two capacitors between pins V
REF+
and AV
SS
and V
REF
/V
eREF
and AV
SS
: 10
μ
F tantalum and 100 nF ceramic.
2. The condition is that the error in a conversion started after t
REFON
is less than
±
0.5 LSB. The settling time depends on the external
capacitive load.
C
VREF+
1
μ
F
0
1 ms
10 ms
100 ms
t
REFON
t
REFON
.66 x C
VREF+
[ms] with C
VREF+
in
μ
F
100
μ
F
10
μ
F
Figure 16. Typical Settling Time of Internal Reference t
REFON
vs External Capacitor on V
REF
+
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