MSP430F42x

MIXED SIGNAL MICROCONTROLLER

SLAS421 − APRIL 2004

28

POST OFFICE BOX 655303

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

noted) (continued)

SD16, power supply and recommended operating conditions

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

AVCC

Analog supply

voltage

AVCC = DVCC

AVSS = DVSS = 0V

2.7

3.6

V

SD16LP = 0,

GAIN: 1, 2

3 V

650

950

Analog supply

current: 1 active

SD16LP = 0,

fSD16 = 1 MHz,

SD16OSR = 256

GAIN: 4, 8, 16

3 V

730

1100

current: 1 active

SD16 channel

fSD16 = 1 MHz,

SD16OSR = 256

GAIN: 32

3 V

1050

1550

µA

SD16 channel

including internal

reference

SD16LP = 1,

fSD16 = 0.5 MHz,

GAIN: 1

3 V

620

930

µA

reference

fSD16 = 0.5 MHz,

SD16OSR = 256

GAIN: 32

3 V

700

1060

fSD16

Analog front-end

input clock

SD16LP = 0 (Low power mode disabled)

3 V

1

MHz

fSD16

input clock

frequency

SD16LP = 1 (Low power mode enabled)

3 V

0.5

MHz

SD16, analog input range (see Note 1)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

SD16GAINx = 1, SD16REFON = 1

±500

Differential input

voltage range for

SD16GAINx = 2, SD16REFON = 1

±250

VID

Differential input

voltage range for

specified

SD16GAINx = 4, SD16REFON = 1

±125

mV

VID

specified

performance

SD16GAINx = 8, SD16REFON = 1

±62

mV

performance

(see Note 2)

SD16GAINx = 16, SD16REFON = 1

±31

(see Note 2)

SD16GAINx = 32, SD16REFON = 1

±15

ZI

Input impedance

(one input pin

fSD16 = 1MHz, SD16GAINx = 1

3 V

200

k

Ω

ZI

(one input pin

to AVSS)

fSD16 = 1MHz, SD16GAINx = 32

3 V

75

k

Ω

ZID

Differential

input impedance

fSD16 = 1MHz, SD16GAINx = 1

3 V

300

400

k

Ω

ZID

input impedance

(IN+ to IN−)

fSD16 = 1MHz, SD16GAINx = 32

3 V

100

150

k

Ω

VI

Absolute input

voltage range

1.0V

V

VIC

Common-mode

input voltage range

1.0V

V

NOTES:

1. All parameters pertain to each SD16 channel.

2. The analog input range depends on the reference voltage applied to VREF. If VREF is sourced externally, the full-scale range

is defined by VFSR+ = +(VREF/2)/GAIN and VFSR− = −(VREF/2)/GAIN. The analog input range should not exceed 80% of

VFSR+ or VFSR−.