MSP430F677X_16 Datasheet, PDF (91/162 Pages) Texas Instruments – Polyphase Metering SoCs

ECCN 5E002 TSPA - Technology / Software Publicly Available
MSP430F677x, MSP430F676x, MSP430F674x
www.ti.com
SLAS768D – SEPTEMBER 2012 – REVISED DECEMBER 2013
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 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
1.96 1.99
1.48 1.5
AVCC minimum voltage,
REFVSEL = {0} for 1.5 V
2.2
AV_CC(min)
Positive built-in reference REFVSEL = {1} for 2 V
2.2
active
REFVSEL = {2} for 2.5 V
2.7
f_ADC10CLK = 5.0 MHz,
REFON = 1, REFBURST = 0,
REFVSEL = {2} for 2.5 V
3V
18
I_REF+
Operating supply current
into AVCC terminal⁽¹⁾
f_ADC10CLK = 5.0 MHz,
REFON = 1, REFBURST = 0,
REFVSEL = {1} for 2 V
3V
16.1
f_ADC10CLK = 5.0 MHz,
REFON = 1, REFBURST = 0,
REFVSEL = {0} for 1.5 V
3V
14.4
TC_REF+
Temperature coefficient of I_VREF+ = 0 A,
built-in reference⁽²⁾
REFVSEL = (0, 1, 2}, REFON = 1
< 18
I_SENSOR
Operating supply current
into AVCC terminal⁽³⁾
REFON = 0, INCH = 0Ah,
ADC10ON = N/A, T_A = 30°C
2.2 V
17
3V
17
V_SENSOR
See ⁽⁴⁾
ADC10ON = 1, INCH = 0Ah,
T_A = 30°C
2.2 V
770
3V
770
V_MID
AV_CC divider at channel 11
ADC10ON = 1, INCH = 0Bh,
V_MID is approximately 0.5 × V_AVCC
2.2 V
3V
1.06 1.1
1.46 1.5
t_{SENSOR(sample)}
Sample time required if
channel 10 is selected⁽⁵⁾
ADC10ON = 1, INCH = 0Ah,
Error of conversion result ≤ 1 LSB
30
t_VMID(sample)
Sample time required if
channel 11 is selected⁽⁶⁾
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,
REFVSEL = (0, 1, 2}, REFON = 1
120
PSRR_AC
Power supply rejection ratio
(ac)
AV_CC = AV_{CC (min)} - AV_CC(max),
T_A = 25°C, f = 1 kHz, ΔVpp = 100 mV,
REFVSEL = (0, 1, 2}, REFON = 1
6.4
t_SETTLE
Settling time of reference
voltage ⁽⁷⁾
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
1.151 1.1623
t_ON
SD24_B internal reference
turn-on time
SD24REFS = 0->1, C_REF = 100 nF
3V
200
MAX
2.55
2.02
1.52
UNIT
V
V
24 µA
21 µA
21 µA
50
ppm/
°C
22
µA
22
mV
1.14
V
1.54
µs
µs
µV/V
mV/V
µs
1.174 V
µs
(1) 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.
(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 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+.
(4) 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.
(5) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t_SENSOR(on).
(6) The on-time t_VMID(on) is included in the sampling time t_VMID(sample); no additional on time is needed.
(7) The condition is that the error in a conversion started after t_REFON is less than ±0.5 LSB.
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