Datasheet

MSP430F42x
MIXED SIGNAL MICROCONTROLLER
SLAS421A − APRIL 2004 − REVISED JUNE 2007
29
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
SD16, analog performance (f
SD16
= 1MHz, SD16OSRx = 256, SD16REFON = 1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
SD16GAINx = 1,Signal Amplitude = 500mV 3 V 83.5 85
SD16GAINx = 2,Signal Amplitude = 250mV 3 V 81.5 84
SINAD
Si
g
nal-to-noise +
SD16GAINx = 4,Signal Amplitude = 125mV
f
IN
= 50Hz,
3 V 76 79.5
dB
SINAD
Signal to noise
+
distortion ratio
SD16GAINx = 8,Signal Amplitude = 62mV
f
IN
=
50Hz
,
100Hz
3 V 73 76.5
dB
SD16GAINx = 16,Signal Amplitude = 31mV 3 V 69 73
SD16GAINx = 32,Signal Amplitude = 15mV 3 V 62 69
SD16GAINx = 1 3 V 0.97 1.00 1.02
SD16GAINx = 2 3 V 1.90 1.96 2.02
G
SD16GAINx = 4 3 V 3.76 3.86 3.96
G
Nominal gain
SD16GAINx = 8 3 V 7.36 7.62 7.84
SD16GAINx = 16 3 V 14.56 15.04 15.52
SD16GAINx = 32 3 V 27.20 28.35 29.76
E
Offset error
SD16GAINx = 1 3 V ±0.2
%FSR
E
OS
Offset error
SD16GAINx = 32 3 V ±1.5
%FSR
dE /dT
Offset error
temperature
SD16GAINx = 1 3 V ±4 ±20
pp
m
dE
OS
/dT
temperature
coefficient
SD16GAINx = 32 3 V ±20 ±100
ppm
FSR/_C
CMRR
Common-mode
SD16GAINx = 1, Common-mode input signal:
V
ID
= 500 mV, f
IN
= 50 Hz, 100 Hz
3 V >90
dB
CMRR
Common mode
rejection ratio
SD16GAINx = 32, Common-mode input signal:
V
ID
= 16 mV, f
IN
= 50 Hz, 100 Hz
3 V >75
dB
AC PSRR
AC power supply
rejection ratio
SD16GAINx = 1, V
CC
= 3 V ± 100 mV, f
VCC
= 50 Hz 3 V >80 dB
X
T
Crosstalk 3 V <−100 dB
SD16, built-in temperature sensor
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
TC
Sensor
Sensor temperature
coefficient
1.18 1.32 1.46 mV/K
V
Offset,sensor
Sensor offset
voltage
−100 100 mV
Stt
Temperature sensor voltage at T
A
= 85°C 3 V 435 475 515
V
Sensor
Sensor output
voltage (see Note 2)
Temperature sensor voltage at T
A
= 25°C 3 V 355 395 435
mV
V
Sensor
vo
lt
age
(
see
N
o
t
e
2)
Temperature sensor voltage at T
A
= 0°C 3 V 320 360 400
mV
NOTES: 1. The following formula can be used to calculate the temperature sensor output voltage:
V
Sensor,typ
= TC
Sensor
( 273 + T [°C] ) + V
Offset,sensor
[mV]
2. Results based on characterization and/or production test, not TC
Sensor
or V
Offset,sensor
.