Datasheet

MSP430F5172, MSP430F5152, MSP430F5132
MSP430F5171, MSP430F5151, MSP430F5131
SLAS619J –AUGUST 2010–REVISED OCTOBER 2013 www.ti.com
REF, Built-In Reference (MSP430F51x2 Devices Only)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
REFVSEL = {2} for 2.5 V, REFON = 1 3 V 2.51 ±1.5%
Positive built-in REFVSEL = {1} for 2.0 V, REFON = 1 3 V 1.99 ±1.5%
VREF+ V
reference voltage
2.2 V,
REFVSEL = {0} for 1.5 V, REFON = 1 1.5 ±1.5%
3 V
REFVSEL = {0} for 1.5 V 1.8
AVCC minimum
AV
CC(min)
voltage, Positive built-in REFVSEL = {1} for 2.0 V 2.3 V
reference active
REFVSEL = {2} for 2.5 V 2.8
f
ADC10CLK
= 5 MHz, REFON = 1,
3 V 15.5 19 µA
REFBURST = 0, REFVSEL = {0} for 1.5 V
Operating supply
f
ADC10CLK
= 5 MHz, REFON = 1,
I
REF+
current into AVCC 3 V 18 24 µA
REFBURST = 0, REFVSEL = {1} for 2.0 V
terminal
(2)
f
ADC10CLK
= 5 MHz, REFON = 1,
3 V 21 30 µA
REFBURST = 0, REFVSEL = {2} for 2.5 V
Temperature coefficient ppm/
TC
REF+
REFVSEL = (0, 1, 2}, REFON = 1 30 50
of built-in reference
(3)
°C
Operating supply 2.2 V 150 180
REFON = 1, INCH = 0Ah,
I
SENSOR
current into AVCC µA
ADC10ON = 1, T
A
= 30°C
3 V 150 190
terminal
(4)
2.2 V 765
REFON = 1, INCH = 0Ah,
V
SENSOR
See
(5)
mV
ADC10ON = 1, T
A
= 30°C
3 V 765
2.2 V 1.06 1.1 1.14
AV
CC
divider at ADC10ON = 1, INCH = 0Bh,
V
MID
V
channel 11 V
MID
is approximately 0.5 × V
AVCC
3 V 1.46 1.5 1.54
Sample time required if
t
SENSOR
ADC10ON = 1, INCH = 0Ah,
channel 10 is 30 µs
(sample)
Error of conversion result ≤ 1 LSB
selected
(6)
Sample time required if
t
VMID
ADC10ON = 1, INCH = 0Bh,
channel 11 is 1 µs
(sample)
Error of conversion result ≤ 1 LSB
selected
(7)
Power supply rejection AV
CC
= AV
CC (min)
- AV
CC(max)
,
PSRR_DC 120 300 µV/V
ratio (dc) T
A
= 25°C, REFVSEL = (0, 1, 2}, REFON = 1
AV
CC
= AV
CC (min)
- AV
CC(max)
,
Power supply rejection
PSRR_AC T
A
= 25°C, f = 1 kHz, ΔVpp = 100 mV, 6.4 mV/V
ratio (ac)
REFVSEL = (0, 1, 2}, REFON = 1
T
A
= -40°C to 85°C 23 125
AV
CC
= AV
CC (min)
- AV
CC(max)
,
Settling time of
t
SETTLE
REFVSEL = {0, 1, 2}, T
A
= 25°C 23 50 µs
reference voltage
(8)
REFON = 0 → 1
T
A
= 85°C 16 25
(1) The leakage current is defined in the leakage current table with P6.x/Ax parameter.
(2) The internal reference current is supplied via terminal AVCC. Consumption is independent of the ADC10ON control bit, unless a
conversion is active. The REFON bit enables to settle the built-in reference before starting an A/D conversion.
(3) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C)/(85°C – (–40°C)).
(4) 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 already included in I
REF+
.
(5) 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.
(6) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t
SENSOR(on)
.
(7) The on-time t
VMID(on)
is included in the sampling time t
VMID(sample)
; no additional on time is needed.
(8) The condition is that the error in a conversion started after t
REFON
is less than ± 0.5 LSB.
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