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MSP430F1122 Datasheet, PDF (27/48 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER | |||
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MSP430x11x2, MSP430x12x2
MIXED SIGNAL MICROCONTROLLER
SLAS361C â JANUARY 2002 â REVISED DECEMBER 2003
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
10-bit ADC, timing parameters
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX UNIT
fADC10CLK
Error of conversion result ⤠±1
LSB
ADC10SR = 0 0.450
ADC10SR = 1 0.450
6.3
MHz
1.5
fADC10OSC
ADC10DIV=0,
fADC10CLK=fADC10OSC
2.2 V/ 3V
3.7
6.3 MHz
tCONVERT Conversion time
Internal oscillator,
fADC10OSC = 3.7 MHz to
2.2 V/ 3 V
2.06
6.3 MHz
3.51 µs
External fADC10CLK from ACLK, MCLK or SMCLK:
ADC10SSEL â 0
13ÃADC10DIVÃ
1/fADC10CLK
µs
tADC10ONâ¡
Turn on settling time of
the ADC
(see Note 1)
100 ns
tSampleâ¡
Sampling time
RS = 400 â¦, RI = 2000 â¦,
CI = 20 pF (see Note 2)
3V
2.2 V
1400
1400
ns
â Not production tested, limits characterized
â¡ Not production tested, limits verified by design
NOTES: 1. The condition is that the error in a conversion started after tADC10ON is less than ±0.5 LSB. The reference and input signal are already
settled.
2. Approximately eight Tau (Ï) are needed to get an error of less than ±0.5 LSB.
tSample = ln(2n+1) x (RS + RI) x CI+ 800 ns. (ADC10SR = 0, n = ADC resolution = 10, RS = external source resistance)
tSample = ln(2n+1) x (RS + RI) x CI+ 2.5 µs. (ADC10SR = 1, n = ADC resolution = 10, RS = external source resistance)
10-bit ADC, linearity parameters
PARAMETER
TEST CONDITIONS
MIN NOM MAX UNIT
1.4 V ⤠(VeREF+ â VREFâ/VeREFâ) min ⤠1.6 V
EI
Integral linearity error
1.6 V < (VeREF+ â VREFâ/VeREFâ) min ⤠[VCC]
2.2 V/3 V
ED
Differential linearity
error
(VeREF+ â VREFâ/VeREFâ)min ⤠(VeREF+ â VREFâ/VeREFâ) 2.2 V/3 V
±1
LSB
±1
±1 LSB
EO Offset error
EG Gain error
(VeREF+ â VREFâ/VeREFâ)min ⤠(VeREF+ â VREFâ/VeREFâ),
Internal impedance of source RS < 100 â¦,
(VeREF+ â VREFâ/VeREFâ)min ⤠(VeREF+ â VREFâ/VeREFâ),
2.2 V/3 V
2.2 V/3 V
±2 ±4 LSB
±1.1 ±2 LSB
ET
Total unadjusted
error
(VeREF+ â VREFâ/VeREFâ)min ⤠(VeREF+ â VREFâ/VeREFâ), 2.2 V/3 V
±2 ±5 LSB
⢠POST OFFICE BOX 655303 DALLAS, TEXAS 75265
27
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