Datasheet

MSP430AFE2x3
MSP430AFE2x2
MSP430AFE2x1
SLAS701A – NOVEMBER 2010– REVISED MARCH 2011 www.ti.com
SD24_A, Temperature Sensor and Built-In V
CC
Sense
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
TC
Sensor
Sensor temperature coefficient 1.18 1.32 1.46 mV/°C
V
Offset,sensor
Sensor offset voltage -100 100 mV
Temperature sensor voltage at T
A
= 85°C 420 475 515
V
Sensor
Sensor output voltage
(1)(2)
3 V mV
Temperature sensor voltage at T
A
= 30°C 350 402 442
f
SD24
= 1 MHz, SD24OSRx = 256, V
CC
/1
V
CC,Sense
V
CC
divider at input 5 V
SD24REFON = 1 1
Source resistance of V
CC
R
Source,VCC
20 kΩ
divider at input 5
(1) The following formula can be used to calculate the temperature sensor output voltage:
V
Sensor,typ
= TC
Sensor
(273 + T [°C]) + V
Offset,sensor
[mV]
(2) Results based on characterization and/or production test, not TC
Sensor
or V
Offset,sensor
. Measured with f
SD24
= 1 MHz, SD24OSRx = 256,
SD24REFON = 1.
SD24_A, Built-In Voltage Reference
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
REF
Internal reference voltage SD24REFON = 1, SD24VMIDON = 0 3 V 1.14 1.2 1.26 V
I
REF
Reference supply current SD24REFON = 1, SD24VMIDON = 0 3 V 200 320 µA
TC Temperature coefficient SD24REFON = 1, SD24VMIDON = 0
(1)
3 V 18 50 ppm/°C
C
REF
V
REF
load capacitance SD24REFON = 1, SD24VMIDON = 0
(2)
100 nF
I
LOAD
V
REF(I)
maximum load current SD24REFON = 1, SD24VMIDON = 0 3 V ±200 nA
SD24REFON = 0→1, SD24VMIDON = 0,
t
ON
Turn-on time 3 V 5 ms
C
REF
= 100nF
DC power supply rejection SD24REFON = 1, SD24VMIDON = 0,
DC PSR 100 µV/V
ΔV
REF
/ΔV
CC
V
CC
= 2.5 V to 3.6 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 V
REF
. However, a capacitance of at least 100 nF is recommended to reduce any reference voltage
noise.
SD24_A, Reference Output Buffer
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
Reference buffer output
V
REF,BUF
SD24REFON = 1, SD24VMIDON = 1 3 V 1.2 V
voltage
Reference supply + reference
I
REF,BUF
output buffer quiescent SD24REFON = 1, SD24VMIDON = 1 3 V 430 650 µA
current
Required load capacitance
C
REF(O)
SD24REFON = 1, SD24VMIDON = 1 470 nF
on VREF
Maximum load current on
I
LOAD,Max
SD24REFON = 1, SD24VMIDON = 1 3 V ±1 mA
VREF
Maximum voltage variation vs
|I
LOAD
| = 0 to 1 mA 3 V -15 +15 mV
load current
SD24REFON = 0→1, SD24VMIDON = 0→1,
t
ON
Turn-on time 3 V 100 µs
C
REF
= 470 nF
30 Submit Documentation Feedback Copyright © 2010–2011, Texas Instruments Incorporated