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| MSP430AFE2X3_17 Datasheet, PDF (30/50 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER | |||
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MSP430AFE2x3
MSP430AFE2x2
MSP430AFE2x1
SLAS701A â NOVEMBER 2010 â REVISED MARCH 2011
www.ti.com
SD24_A, Temperature Sensor and Built-In VCC Sense
PARAMETER
TEST CONDITIONS
TCSensor
VOffset,sensor
VSensor
VCC,Sense
Sensor temperature coefficient
Sensor offset voltage
Sensor output voltage(1)(2)
VCC divider at input 5
Temperature sensor voltage at TA = 85°C
Temperature sensor voltage at TA = 30°C
fSD24 = 1 MHz, SD24OSRx = 256,
SD24REFON = 1
RSource,VCC
Source resistance of VCC
divider at input 5
VCC
MIN TYP MAX UNIT
1.18 1.32 1.46 mV/°C
-100
100 mV
420 475 515
3V
mV
350 402 442
VCC/1
1
V
20
kΩ
(1) The following formula can be used to calculate the temperature sensor output voltage:
VSensor,typ = TCSensor (273 + T [°C]) + VOffset,sensor [mV]
(2) Results based on characterization and/or production test, not TCSensor or VOffset,sensor. Measured with fSD24 = 1 MHz, SD24OSRx = 256,
SD24REFON = 1.
SD24_A, Built-In Voltage Reference
VREF
IREF
TC
CREF
ILOAD
tON
DC PSR
PARAMETER
Internal reference voltage
Reference supply current
Temperature coefficient
VREF load capacitance
VREF(I) maximum load current
Turn-on time
DC power supply rejection
ÎVREF/ÎVCC
TEST CONDITIONS
SD24REFON = 1, SD24VMIDON = 0
SD24REFON = 1, SD24VMIDON = 0
SD24REFON = 1, SD24VMIDON = 0(1)
SD24REFON = 1, SD24VMIDON = 0(2)
SD24REFON = 1, SD24VMIDON = 0
SD24REFON = 0â1, SD24VMIDON = 0,
CREF = 100nF
SD24REFON = 1, SD24VMIDON = 0,
VCC = 2.5 V to 3.6 V
VCC
MIN TYP MAX UNIT
3V
1.14
1.2 1.26
V
3V
200 320 µA
3V
18
50 ppm/°C
100
nF
3V
±200 nA
3V
5
ms
100
µV/V
(1) Calculated using the box method: (MAX(-40...85°C) - MIN(-40...85°C)) / MIN(-40...85°C) / (85°C - (-40°C))
(2) There is no capacitance required on VREF. However, a capacitance of at least 100 nF is recommended to reduce any reference voltage
noise.
SD24_A, Reference Output Buffer
PARAMETER
TEST CONDITIONS
VREF,BUF
Reference buffer output
voltage
SD24REFON = 1, SD24VMIDON = 1
IREF,BUF
Reference supply + reference
output buffer quiescent
SD24REFON = 1, SD24VMIDON = 1
current
CREF(O)
Required load capacitance
on VREF
SD24REFON = 1, SD24VMIDON = 1
ILOAD,Max
Maximum load current on
VREF
SD24REFON = 1, SD24VMIDON = 1
Maximum voltage variation vs
load current
|ILOAD| = 0 to 1 mA
tON
Turn-on time
SD24REFON = 0â1, SD24VMIDON = 0â1,
CREF = 470 nF
VCC
MIN TYP MAX UNIT
3V
1.2
V
3V
430 650 µA
470
nF
3V
±1 mA
3V
-15
+15 mV
3V
100
µs
30
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