CC430F613X_12 Datasheet, PDF (69/121 Pages) Texas Instruments – MSP430™ SoC with RF Core

www.ti.com
ECCN 5E002 TSPA - Technology / Software Publicly Available
CC430F613x
CC430F612x
CC430F513x
SLAS554F – MAY 2009 – REVISED DECEMBER 2011
REF, Built-In Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)⁽¹⁾
PARAMETER
V_REF+
Positive built-in reference
voltage output
AV_CC(min)
AV_CC minimum voltage,
Positive built-in reference
active
TEST CONDITIONS
REFVSEL = 2 for 2.5 V
REFON = REFOUT = 1
I_VREF+= 0 A
REFVSEL = 1 for 2.0 V
REFON = REFOUT = 1
I_VREF+= 0 A
REFVSEL = 0 for 1.5 V
REFON = REFOUT = 1
I_VREF+= 0 A
REFVSEL = 0 for 1.5 V, reduced performance
REFVSEL = 0 for 1.5 V
REFVSEL = 1 for 2.0 V
REFVSEL = 2 for 2.5 V
V_CC
3V
3V
2.2 V/ 3 V
MIN TYP MAX UNIT
2.41 ±1.5%
1.93 ±1.5% V
1.45 ±1.5%
1.8
2.2
V
2.3
2.8
I_REF+
Operating supply current into ^{REFON = 1, REFOUT = 0, REFBURST = 0}
AV_CC terminal^{(2) (3)}
REFON = 1, REFOUT = 1, REFBURST = 0
3V
3V
100 140 µA
0.9 1.5 mA
I_L(VREF+)
Load-current regulation,
V_REF+ terminal⁽⁴⁾
REFVSEL = 0, 1, 2
I_VREF+ = +10 µA/–1000 µA
AV_CC = AV_{CC (min)} for each reference level.
REFVSEL = 0, 1, 2; REFON = REFOUT = 1
2500 µV/mA
C_VREF+
Capacitance at VREF+
terminals, internal reference
REFON = REFOUT = 1
20
100 pF
TC_REF+
Temperature coefficient of
built-in reference⁽⁵⁾
I_VREF+ = 0 A
REFVSEL = 0, 1, 2;
REFON = 1, REFOUT = 0 or 1
30
50
ppm/
°C
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, REFOUT = 0 or 1
120 300 µV/V
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, REFOUT = 0 or 1
6.4
mV/V
t_SETTLE
Settling time of reference
voltage ⁽⁶⁾
AV_CC = AV_{CC (min)} - AV_CC(max)
REFVSEL = 0, 1, 2;
REFOUT = 0, REFON = 0 → 1
AV_CC = AV_{CC (min)} - AV_CC(max)
C_VREF = C_VREF(max)
REFVSEL = 0, 1, 2;
REFOUT = 1, REFON = 0 → 1
75
µs
75
(1) The reference is supplied to the ADC by the REF module and is buffered locally inside the ADC. The ADC uses two internal buffers, one
smaller and one larger for driving the V_REF+ terminal. When REFOUT = 1, the reference is available at the V_REF+ terminal, as well as,
used as the reference for the conversion and utilizes the larger buffer. When REFOUT = 0, the reference is only used as the reference
for the conversion and utilizes the smaller buffer.
(2) The internal reference current is supplied via terminal AV_CC. Consumption is independent of the ADC12ON control bit, unless a
conversion is active. The REFON bit enables to settle the built-in reference before starting an A/D conversion. REFOUT = 0 represents
the current contribution of the smaller buffer. REFOUT = 1 represents the current contribution of the larger buffer without external load.
(3) The temperature sensor is provided by the REF module. Its current is supplied via terminal AV_CC and is equivalent to I_REF+ with REFON
=1 and REFOUT = 0.
(4) Contribution only due to the reference and buffer including package. This does not include resistance due to PCB trace, etc.
(5) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C)/(85°C – (–40°C)).
(6) The condition is that the error in a conversion started after t_REFON is less than ±0.5 LSB. The settling time depends on the external
capacitive load when REFOUT = 1.
Copyright © 2009–2011, Texas Instruments Incorporated
Submit Documentation Feedback
69