Datasheet

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  
SLAS491A − AUGUST 2005 − REVISED OCTOBER 2005
45
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MSP430x20x3 electrical characteristics over recommended ranges of supply voltage and
operating free-air temperature (unless otherwise noted) (continued)
typical characteristics − SD16_A SINAD performance over OSR (MSP430x20x3 only)
OSR
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
100.0
10.00 100.00 1000.00
SINAD − dB
Figure 22. SINAD performance over OSR, f
SD16
= 1MHz, SD16REFON = 1, SD16GAINx = 1
PW, or N
SD16_A, performance (f
SD16
= 1MHz, SD16OSRx = 256, SD16REFON = 1, MSP430x20x3 only)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
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 (see Note 1)
SD16GAINx = 8
3 V 7.36 7.62 7.84
Nominal Gain (see Note 1)
SD16GAINx = 16 3 V 14.56 15.04 15.52
SD16GAINx = 32 3 V 27.20 28.35 29.76
dG/dT Gain Temperature Drift SD16GAINx = 1 (see Note 2) 3 V 15 ppm/_C
dG/dV
CC
Gain Supply Voltage Drift
SD16GAINx = 1; V
CC
= 2.5V - 3.6V
(see Note 3)
2.5V-3.6V 0.35 %/V
E
OS
Offset Error (see Note 1)
SD16GAINx = 1 3 V ±0.2
%FSR
E
OS
Offset Error (see Note 1)
SD16GAINx = 32
3 V ±1.5
%FSR
dE
OS
/dT
Offset Error Temperature
SD16GAINx = 1 3 V ±4 ±20
ppm
dE
OS
/dT
Offset Error Temperature
Coefficient (see Note 1)
SD16GAINx = 32
3 V ±20 ±100
ppm
FSR/_C
CMRR
Common-Mode Rejection Ratio
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
PSRR Power Supply Rejection Ratio SD16GAINx = 1 3 V >80 dB
NOTES: 1. Not production tested, limits characterized.
2. Calculated using the box method: (MAX(−40...85_C) − MIN(−40...85_C))/MIN(−40...85_C)/(85_C − (−40_C))
3. Calculated using the box method: (MAX(2.5...3.6V) − MIN(2.5...3.6V))/MIN(2.5...3.6V)/(3.6V − 2.5V)