CC430F613 datasheet(69/120 Pages) TI

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ECCN 5E002 TSPA - Technology / Software Publicly Available

CC430F613x

CC430F612x

CC430F513x

www.ti.com

SLAS554G – MAY 2009 – REVISED FEBRUARY 2013

REF, Built-In Reference

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

(1)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

REFVSEL = 2 for 2.5 V,

REFON = REFOUT = 1,

3 V

2.41

±1.5%

IVREF+= 0 A

REFVSEL = 1 for 2.0 V,

Positive built-in reference

VREF+

REFON = REFOUT = 1,

3 V

1.93

±1.5%

voltage output

IVREF+= 0 A

REFVSEL = 0 for 1.5 V,

REFON = REFOUT = 1,

2.2 V, 3 V

1.45

±1.5%

IVREF+= 0 A

REFVSEL = 0 for 1.5 V, reduced performance

1.8

AVCC minimum voltage,

REFVSEL = 0 for 1.5 V

2.2

AVCC(min)

Positive built-in reference

REFVSEL = 1 for 2.0 V

2.3

active

REFVSEL = 2 for 2.5 V

2.8

REFON = 1, REFOUT = 0, REFBURST = 0

3 V

100

140

µA

Operating supply current into

IREF+

AVCC terminal

(2) (3)

REFON = 1, REFOUT = 1, REFBURST = 0

3 V

0.9

1.5

REFVSEL = 0, 1, or 2,

Load-current regulation,

IVREF+ = +10 µA or –1000 µA,

IL(VREF+)

2500 µV/mA

VREF+ terminal(4)

AVCC = AVCC (min) for each reference level,

REFON = REFOUT = 1

Capacitance at VREF+

CVREF+

REFON = REFOUT = 1

100

terminals, internal reference

IVREF+ = 0 A,

Temperature coefficient of

ppm/

TCREF+

REFVSEL = 0, 1, or 2,

built-in reference(5)

°C

REFON = 1, REFOUT = 0 or 1

AVCC = AVCC (min) - AVCC(max),

Power supply rejection ratio

PSRR_DC

TA = 25 °C, REFVSEL = 0, 1, or 2,

120

300

µV/V

(DC)

REFON = 1, REFOUT = 0 or 1

AVCC = AVCC (min) - AVCC(max)

Power supply rejection ratio

TA = 25 °C, f = 1 kHz, ΔVpp = 100 mV,

PSRR_AC

6.4

mV/V

(AC)

REFVSEL = 0, 1, or 2,

REFON = 1, REFOUT = 0 or 1

AVCC = AVCC (min) - AVCC(max),

REFVSEL = 0, 1, or 2,

REFOUT = 0, REFON = 0

→ 1

Settling time of reference

tSETTLE

µs

AVCC = AVCC (min) - AVCC(max),

voltage(6)

CVREF = CVREF(max),

REFVSEL = 0, 1, or 2,

REFOUT = 1, REFON = 0

→ 1

(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 VREF+ terminal. When REFOUT = 1, the reference is available at the VREF+ 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 AVCC. 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 AVCC and is equivalent to IREF+ 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 or other causes.

(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 tREFON is less than ±0.5 LSB. The settling time depends on the external

capacitive load when REFOUT = 1.

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