MSP430G2744, MSP430G2544, MSP430G2444
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SLAS892C – MARCH 2013 – REVISED SEPTEMBER 2014
5.33 10-Bit ADC, Linearity Parameters
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
E
I
Integral linearity error
SREFx = 010
3 V
±1
LSB
E
D
Differential linearity error
SREFx = 010
3 V
±1
LSB
E
O
Offset error
Source impedance R
S
< 100
Ω
, SREFx = 010
3 V
±1
LSB
E
G
Gain error
SREFx = 010
3 V
±1.1
±2
LSB
E
T
Total unadjusted error
SREFx = 010
3 V
±2
±6
LSB
(1)
Using the integrated reference buffer (SREFx = 010) increases the gain, and offset and total unadjusted error.
5.34 10-Bit ADC, Temperature Sensor and Built-In V
MID
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
Temperature sensor supply
REFON = 0, INCHx = 0Ah,
I
SENSOR
3 V
60
µA
current
(1)
T
A
= 25°C
TC
SENSOR
ADC10ON = 1, INCHx = 0Ah
(2)
3 V
3.55
mV/°C
Sample time required if
ADC10ON = 1, INCHx = 0Ah,
t
SENSOR(sample)
3 V
30
µs
channel 10 is selected
(3)
Error of conversion result
≤
1 LSB
Current into divider at
I
VMID
ADC10ON = 1, INCHx = 0Bh
3 V
(3)
µA
channel 11
ADC10ON = 1, INCHx = 0Bh,
V
MID
V
CC
divider at channel 11
3 V
1.5
V
V
MID
≈
0.5 × V
CC
Sample time required if
ADC10ON = 1, INCHx = 0Bh,
t
VMID(sample)
3 V
1220
ns
channel 11 is selected
(4)
Error of conversion result
≤
1 LSB
(1)
The sensor current I
SENSOR
is consumed if (ADC10ON = 1 and REFON = 1), or (ADC10ON = 1 and INCH = 0Ah and sample signal is
high).When REFON = 1, I
SENSOR
is included in I
REF+
.When REFON = 0, I
SENSOR
applies during conversion of the temperature sensor
input (INCH = 0Ah).
(2)
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] or
V
Sensor,typ
= TC
Sensor
T [°C] + V
Sensor
(T
A
= 0°C) [mV]
(3)
No additional current is needed. The V
MID
is used during sampling.
(4)
The on time, t
VMID(on)
, is included in the sampling time, t
VMID(sample)
; no additional on time is needed.
Copyright © 2013–2014, Texas Instruments Incorporated
Specifications
35
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