MSP430F435IPZ datasheet(67/85 Pages) TI

67 / 85 page

MSP430x43x, MSP430x44x

MIXED SIGNAL MICROCONTROLLER

SLAS344A – JANUARY 2002 – REVISED FEBRUARY 2002

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

–

µF 100 nF

AVSS

MSP430F43x

MSP430F44x

–

µF 100 nF

AVCC

µF 100 nF

DVSS

DVCC

From

Power

Supply

–

Apply External Reference (VeREF+)

or Use Internal Reference (VREF+)

VREF+ or VeREF+

VREF–/VeREF–

Reference Is Internally

Switched to AVSS

Figure 26. Supply Voltage and Reference Voltage Design VREF–/VeREF– = AVSS, Internally Connected

electrical characteristics over recommended operating free-air temperature (unless otherwise

noted)

12-bit ADC, temperature sensor and built-in Vmid

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

Operating supply current

into AVCC terminal

V(REFON) = 0, INCH = 0Ah,

VCC = 2.2 V

120

ICC(SENSOR)

into AVCC terminal

(see Note 1)

V(REFON) = 0, INCH = 0Ah,

ADC12ON = NA, TA = 25_C

VCC = 3 V

160

µA

†

ADC12ON = 1, INCH = 0Ah,

2 2 V/3 V

986

±5%

V(SENSOR)†

ADC12ON = 1, INCH = 0Ah,

TA = 0°C

VCC = 2.2 V/3 V

986

±5%

†

ADC12ON

1 INCH

0Ah

2 2 V/3 V

355

±3% mV/°C

TC(SENSOR)†

ADC12ON = 1, INCH = 0Ah

VCC = 2.2 V/3 V

3.55

±3% mV/°C

†

Sample time required if

channel 10 is selected

ADC12ON = 1, INCH = 0Ah,

2 2 V/3 V

ts(SENSOR)†

channel 10 is selected

(see Note 2)

ADC12ON = 1, INCH = 0Ah,

Error of conversion result

≤ 1 LSB VCC = 2.2 V/3 V

µs

AVCC di ider at channel 11

ADC12ON = 1, INCH = 0Bh,

VCC = 2.2 V

1.1

±0.04

V(MID)

AVCC divider at channel 11

ADC12ON = 1, INCH = 0Bh,

V(MID) is ~0.5 x V(AVCC)

VCC = 3 V

1.5

±0.04

t(ON VMID)

On-time if channel 11 is

ADC12ON = 1, INCH = 0Bh,

VCC 2 2 V/3 V

t(ON_VMID)

On time if channel 11 is

selected (see Note 3)

ADC12ON = 1, INCH = 0Bh,

Error of conversion result

≤ 1 LSB

VCC = 2.2 V/3 V

† Not production tested, limits characterized

‡ Not production tested, limits verified by design

NOTES:

1. The sensor current ISENSOR is consumed if (ADC12ON = 1 and V(REFON) = 1), or (ADC12ON=1 AND INCH=0Ah and sample signal

is high). Therefore it includes the constant current through the sensor and the reference.

2. The typical equivalent impedance of the sensor is 51 k

Ω. The sample time needed is the sensor-on time t(SENSOR_ON)

3. The on-time t(ON_VMID) is identical to sampling time t(Sample); no additional on time is needed.

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