參數(shù)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(shù)： 42/70頁
文件大?。?/td> 1176K
代理商： MSP430P315S
SLAS368D
OCTOBER 2002
REVISED MARCH 2005
42
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
12-bit ADC, temperature sensor and built-in V
MID
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
120
UNIT
Operating supply current into
AV
CC
terminal (see Note 1)
REFON = 0, INCH = 0Ah,
ADC12ON=NA, T
A
= 25 C
2.2 V
40
I
SENSOR
3 V
60
160
μ
A
ADC12ON = 1, INCH = 0Ah,
T
A
= 0
°
C
2.2 V
986
V
SENSOR
(see Note 2)
3 V
986
mV
2.2 V
3.55
3.55
±
3%
3.55
±
3%
TC
SENSOR
ADC12ON = 1, INCH = 0Ah
3 V
3.55
mV/
°
C
Sample time required if channel
10 is selected (see Note 3)
ADC12ON = 1, INCH = 0Ah,
Error of conversion result
1
LSB
≤
2.2 V
30
t
SENSOR(sample)
3 V
30
μ
s
Current into divider at channel 11
(see Note 4)
2.2 V
NA
I
VMID
ADC12ON = 1, INCH = 0Bh,
3 V
NA
μ
A
ADC12ON = 1, INCH = 0Bh,
V
MID
is ~0.5 x V
AVCC
2.2 V
1.1
1.1
±
0.04
1.50
±
0.04
V
MID
AV
CC
divider at channel 11
3 V
1.5
V
Sample time required if channel
11 is selected (see Note 5)
ADC12ON = 1, INCH = 0Bh,
Error of conversion result
1
LSB
≤
2.2 V
1400
t
VMID(sample)
3 V
1220
ns
Not production tested, limits characterized
NOTES:
1. The sensor current I
SENSOR
is consumed if (ADC12ON = 1 and REFON=1), or (ADC12ON=1 AND INCH=0Ah and sample signal
is high). When REFON = 1, I
SENSOR
is already included in I
REF+
.
2. The temperature sensor offset can be as much as
±
20 C. A single-point calibration is recommended in order to minimize the offset
error of the built-in temperature sensor.
3. The typical equivalent impedance of the sensor is 51 k
. The sample time required includes the sensor-on time t
SENSOR(on)
4. No additional current is needed. The V
MID
is used during sampling.
5. The on-time t
VMID(on)
is included in the sampling time t
VMID(sample)
; no additional on time is needed.
12-bit DAC, supply specifications
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
AV
CC
Analog supply voltage
AV
CC =
DV
CC
,
AV
SS
= DV
SS
=0 V
DAC12AMPx=2, DAC12IR=0,
DAC12_xDAT=0800h
2.20
3.60
V
2.2V/3V
50
110
Supply Current:
Single DAC Channel
(see Notes 1 and 2)
DAC12AMPx=2, DAC12IR=1,
DAC12_xDAT=0800h
,
V
eREF+
=V
REF+
= AV
CC
DAC12AMPx=5, DAC12IR=1,
DAC12_xDAT=0800h, V
eREF+
=V
REF+
= AV
CC
DAC12AMPx=7, DAC12IR=1,
DAC12_xDAT=0800h, V
eREF+
=V
REF+
= AV
CC
DAC12_xDAT = 800h, V
REF
= 1.5 V
AV
CC
= 100mV
DAC12_xDAT = 800h, V
REF
= 1.5 V or 2.5 V
AV
CC
= 100mV
2.2V/3V
50
110
I
DD
2.2V/3V
200
440
μ
A
2.2V/3V
700
1500
Power supply
rejection ratio
(see Notes 3 and 4)
2.2V
PSRR
3V
70
dB
NOTES:
1. No load at the output pin, DAC12_0 or DAC12_1, assuming that the control bits for the shared pins are set properly.
2. Current into reference terminals not included. If DAC12IR = 1 current flows through the input divider; see Reference Input
specifications.
3. PSRR = 20*log
{
AV
CC
/
V
DAC12_xOUT
}.
4. V
REF
is applied externally. The internal reference is not used.
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