MSP430F673X Datasheet, PDF (80/121 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F673x
MSP430F672x
SLAS731A – DECEMBER 2011 – REVISED APRIL 2012
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REF, Built-In Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_REF+
PARAMETER
Positive built-in reference
voltage
TEST CONDITIONS
REFVSEL = {2} for 2.5 V, REFON = 1
REFVSEL = {1} for 2.0 V, REFON = 1
REFVSEL = {0} for 1.5 V, REFON = 1
V_CC
3V
3V
2.2 V, 3 V
MIN TYP
2.47 2.51
1.95 1.99
1.46 1.50
AV_CC minimum voltage,
REFVSEL = {0} for 1.5 V
1.8
AV_CC(min)
Positive built-in reference REFVSEL = {1} for 2.0 V
2.2
active
REFVSEL = {2} for 2.5 V
2.7
f_ADC10CLK = 5 MHz,
REFON = 1, REFBURST = 0,
REFVSEL = {2} for 2.5 V
3V
23
I_REF+
Operating supply current
into AV_CC terminal⁽¹⁾
f_ADC10CLK = 5 MHz,
REFON = 1, REFBURST = 0,
REFVSEL = {1} for 2.0 V
3V
21
f_ADC10CLK = 5 MHz,
REFON = 1, REFBURST = 0,
REFVSEL = {0} for 1.5 V
3V
19
TC_REF+
Temperature coefficient of
built-in reference⁽²⁾
REFVSEL = {0, 1, 2}, REFON = 1
10
I_SENSOR
Operating supply current
into AV_CC terminal
REFON = 1, ADC10ON = 1,
INCH = 0Ah, T_A = 30°C
2.2 V
145
3V
170
V_SENSOR
See ⁽³⁾
REFON = 1, ADC10ON = 1,
INCH = 0Ah, T_A = 30°C
2.2 V
780
3V
780
V_MID
AV_CC divider at channel 11
ADC10ON = 1, INCH = 0Bh,
V_MID is ~0.5 × V_AVCC
2.2 V
3V
1.08 1.1
1.48 1.5
t_{SENSOR(sample)}
Sample time required if
channel 10 is selected⁽⁴⁾
REFON = 1, ADC10ON = 1, INCH = 0Ah,
Error of conversion result ≤ 1 LSB
30
t_VMID(sample)
Sample time required if
channel 11 is selected⁽⁵⁾
ADC10ON = 1, INCH = 0Bh,
Error of conversion result ≤ 1 LSB
1
PSRR_DC
Power supply rejection ratio
(dc)
AV_CC = AV_{CC (min)} - AV_CC(max)
T_A = 25 °C
120
REFVSEL = {0, 1, 2}, REFON = 1
AV_CC = AV_{CC (min)} - AV_CC(max)
PSRR_AC
Power supply rejection ratio TA = 25 °C
(ac)
f = 1 kHz, ΔVpp = 100 mV
1
REFVSEL = {0, 1, 2}, REFON = 1
t_SETTLE
Settling time of reference
voltage ⁽⁶⁾
AV_CC = AV_{CC (min)} - AV_CC(max)
REFVSEL = {0, 1, 2}, REFON = 0 → 1
75
V_SD24REF
SD24_B internal reference
voltage
SD24REFS = 1
3V
1.137 1.151
t_ON
SD24_B internal reference
turn-on time⁽⁷⁾
SD24REFS = 0->1, C_REF = 100 nF
3V
200
MAX
2.55
2.03
1.54
UNIT
V
V
30 µA
27 µA
25 µA
50
ppm/
°C
220
µA
245
mV
1.12
V
1.52
µs
µs
300 µV/V
mV/V
µs
1.165 V
µs
(1) The internal reference current is supplied via terminal AV_CC. 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.
(2) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C)/(85°C – (–40°C)).
(3) The temperature sensor offset can be as much as ±20°C. A single-point calibration is recommended to minimize the offset error of the
built-in temperature sensor.
(4) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t_SENSOR(on).
(5) The on-time t_VMID(on) is included in the sampling time t_VMID(sample); no additional on time is needed.
(6) The condition is that the error in a conversion started after t_REFON is ≤ 1 LSB.
(7) The condition is that SD24_B conversion started after t_ON should guarantee specified SINAD values for the selected Gain, OSR and
f_SD24.
80
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