MSP430F677X1_16 Datasheet, PDF (68/162 Pages) Texas Instruments – Polyphase Metering SoCs

MSP430F677x1, MSP430F676x1, MSP430F674x1
SLAS815C – NOVEMBER 2012 – REVISED DECEMBER 2013
www.ti.com
Internal Very-Low-Power Low-Frequency Oscillator (VLO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
f_VLO
VLO frequency
df_VLO/d_T VLO frequency temperature drift
df_VLO/dV_CC VLO frequency supply voltage drift
Duty cycle
TEST CONDITIONS
Measured at ACLK
Measured at ACLK
Measured at ACLK
Measured at ACLK
V_CC
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
MIN TYP
6 9.6
0.5
4
40
50
MAX
15
60
UNIT
kHz
%/°C
%/V
%
Internal Reference, Low-Frequency Oscillator (REFO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
I_REFO
PARAMETER
REFO oscillator current consumption
REFO frequency calibrated
TEST CONDITIONS
T_A = 25°C
Measured at ACLK
V_CC
1.8 V to 3.6 V
1.8 V to 3.6 V
MIN TYP
3
32768
f_REFO
df_REFO/d_T
df_REFO/dV_CC
REFO absolute tolerance calibrated
REFO frequency temperature drift
REFO frequency supply voltage drift
Duty cycle
Full temperature range
T_A = 25°C
Measured at ACLK
Measured at ACLK
Measured at ACLK
1.8 V to 3.6 V
3V
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
-3.5
-1.5
0.01
1.0
40
50
t_START
REFO startup time
40%/60% duty cycle
1.8 V to 3.6 V
25
MAX
+3.5
+1.5
60
UNIT
µA
Hz
%
%
%/°C
%/V
%
µs
DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
f_DCO(0,0)
f_DCO(0,31)
f_DCO(1,0)
f_DCO(1,31)
f_DCO(2,0)
f_DCO(2,31)
f_DCO(3,0)
f_DCO(3,31)
f_DCO(4,0)
f_DCO(4,31)
f_DCO(5,0)
f_DCO(5,31)
f_DCO(6,0)
f_DCO(6,31)
f_DCO(7,0)
f_DCO(7,31)
S_DCORSEL
PARAMETER
DCO frequency (0, 0)⁽¹⁾
DCO frequency (0, 31)⁽¹⁾
DCO frequency (1, 0)⁽¹⁾
DCO frequency (1, 31)⁽¹⁾
DCO frequency (2, 0)⁽¹⁾
DCO frequency (2, 31)⁽¹⁾
DCO frequency (3, 0)⁽¹⁾
DCO frequency (3, 31)⁽¹⁾
DCO frequency (4, 0)⁽¹⁾
DCO frequency (4, 31)⁽¹⁾
DCO frequency (5, 0)⁽¹⁾
DCO frequency (5, 31)⁽¹⁾
DCO frequency (6, 0)⁽¹⁾
DCO frequency (6, 31)⁽¹⁾
DCO frequency (7, 0)⁽¹⁾
DCO frequency (7, 31)⁽¹⁾
Frequency step between range
DCORSEL and DCORSEL + 1
TEST CONDITIONS
DCORSELx = 0, DCOx = 0, MODx = 0
DCORSELx = 0, DCOx = 31, MODx = 0
DCORSELx = 1, DCOx = 0, MODx = 0
DCORSELx = 1, DCOx = 31, MODx = 0
DCORSELx = 2, DCOx = 0, MODx = 0
DCORSELx = 2, DCOx = 31, MODx = 0
DCORSELx = 3, DCOx = 0, MODx = 0
DCORSELx = 3, DCOx = 31, MODx = 0
DCORSELx = 4, DCOx = 0, MODx = 0
DCORSELx = 4, DCOx = 31, MODx = 0
DCORSELx = 5, DCOx = 0, MODx = 0
DCORSELx = 5, DCOx = 31, MODx = 0
DCORSELx = 6, DCOx = 0, MODx = 0
DCORSELx = 6, DCOx = 31, MODx = 0
DCORSELx = 7, DCOx = 0, MODx = 0
DCORSELx = 7, DCOx = 31, MODx = 0
S_RSEL = f_{DCO(DCORSEL+1,DCO)}/f_{DCO(DCORSEL,DCO)}
MIN TYP
0.07
0.70
0.15
1.47
0.32
3.17
0.64
6.07
1.3
12.3
2.5
23.7
4.6
39.0
8.5
60
1.2
S_DCO
Frequency step between tap
DCO and DCO + 1
S_DCO = f_{DCO(DCORSEL,DCO+1)}/f_{DCO(DCORSEL,DCO)}
1.02
Duty cycle
Measured at SMCLK
40
50
df_DCO/dT
DCO frequency temperature drift f_DCO = 1 MHz
0.1
MAX
0.20
1.70
0.36
3.45
0.75
7.38
1.51
14.0
3.2
28.2
6.0
54.1
10.7
88.0
19.6
135
UNIT
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
2.3 ratio
1.12 ratio
60 %
%/°C
(1) When selecting the proper DCO frequency range (DCORSELx), the target DCO frequency, f_DCO, should be set to reside within the
range of f_{DCO(n, 0),MAX} ≤ f_DCO ≤ f_{DCO(n, 31),MIN}, where f_{DCO(n, 0),MAX} represents the maximum frequency specified for the DCO frequency,
range n, tap 0 (DCOx = 0) and f_{DCO(n,31),MIN} represents the minimum frequency specified for the DCO frequency, range n, tap
31 (DCOx = 31). This ensures that the target DCO frequency resides within the range selected. It should also be noted that if the actual
f_DCO frequency for the selected range causes the FLL or the application to select tap 0 or 31, the DCO fault flag is set to report that the
selected range is at its minimum or maximum tap setting.
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