Datasheet

MSP430F20x3
MSP430F20x2
MSP430F20x1
SLAS491I –AUGUST 2005–REVISED DECEMBER 2012 www.ti.com
10-Bit ADC, Linearity Parameters (MSP430F20x2)
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 2.2 V, 3 V ±1 LSB
E
D
Differential linearity error 2.2 V, 3 V ±1 LSB
E
O
Offset error Source impedance R
S
< 100 Ω 2.2 V, 3 V ±1 LSB
E
G
Gain error 2.2 V, 3 V ±1.1 ±2 LSB
E
T
Total unadjusted error 2.2 V, 3 V ±2 ±5 LSB
10-Bit ADC, Temperature Sensor and Built-In V
MID
(MSP430F20x2)
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
2.2 V 40 120
Temperature sensor supply REFON = 0, INCHx = 0Ah,
I
SENSOR
µA
current
(1)
T
A
= 25°C
3 V 60 160
TC
SENSOR
ADC10ON = 1, INCHx = 0Ah
(2)
2.2 V, 3 V 3.44 3.55 3.66 mV/°C
V
Offset,Sensor
Sensor offset voltage ADC10ON = 1, INCHx = 0Ah
(2)
-100 100 mV
Temperature sensor voltage at
1265 1365 1465
T
A
= 105°C (T version only)
Temperature sensor voltage at
1195 1295 1395
T
A
= 85°C
V
SENSOR
Sensor output voltage
(3)
2.2 V, 3 V mV
Temperature sensor voltage at
985 1085 1185
T
A
= 25°C
Temperature sensor voltage at
895 995 1095
T
A
= 0°C
Sample time required if ADC10ON = 1, INCHx = 0Ah,
t
SENSOR(sample)
2.2 V, 3 V 30 µs
channel 10 is selected
(4)
Error of conversion result ≤ 1 LSB
2.2 V N/A
Current into divider at
I
VMID
ADC10ON = 1, INCHx = 0Bh µA
channel 11
(4)
3 V N/A
2.2 V 1.06 1.1 1.14
ADC10ON = 1, INCHx = 0Bh,
V
MID
V
CC
divider at channel 11 V
V
MID
≈ 0.5 × V
CC
3 V 1.46 1.5 1.54
2.2 V 1400
Sample time required if ADC10ON = 1, INCHx = 0Bh,
t
VMID(sample)
ns
channel 11 is selected
(5)
Error of conversion result ≤ 1 LSB
3 V 1220
(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) Results based on characterization and/or production test, not TC
Sensor
or V
Offset,sensor
.
(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.
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