MSP430X13X Datasheet, PDF (37/59 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x13x, MSP430x14x, MSP430x14x1
MIXED SIGNAL MICROCONTROLLER
SLAS272F − JULY 2000 − REVISED JUNE 2004
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
12-bit ADC, timing parameters
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX UNIT
fADC12CLK
For specified performance of ADC12
linearity parameters
2.2V/
3V
0.45
5
6.3 MHz
fADC12OSC
Internal ADC12
oscillator
ADC12DIV=0,
fADC12CLK=fADC12OSC
2.2 V/
3V
3.7
6.3 MHz
tCONVERT Conversion time
CVREF+ ≥ 5 µF, Internal oscillator,
fADC12OSC = 3.7 MHz to 6.3 MHz
2.2 V/
3V
2.06
3.51 µs
External fADC12CLK from ACLK, MCLK or SMCLK:
ADC12SSEL ≠ 0
13×ADC12DIV×
1/fADC12CLK
µs
tADC12ON‡
Turn on settling time of
the ADC
(see Note 1)
100 ns
RS = 400 Ω, RI = 1000 Ω,
3V
1220
tSample‡
Sampling time
CI = 30 pF
ns
τ = [RS + RI] x CI;(see Note 2)
2.2 V 1400
† _{Not production tested, limits characterized}
‡ _{Not production tested, limits verified by design}
NOTES: 1. The condition is that the error in a conversion started after tADC12ON is less than ±0.5 LSB. The reference and input signal are already
settled.
2. Approximately ten Tau (τ) are needed to get an error of less than ±0.5 LSB:
tSample = ln(2n+1) x (RS + RI) x CI+ 800 ns where n = ADC resolution = 12, RS = external source resistance.
12-bit ADC, linearity parameters
PARAMETER
TEST CONDITIONS
MIN NOM MAX UNIT
1.4 V ≤ (VeREF+ − VREF−/VeREF−) min ≤ 1.6 V
EI Integral linearity error _{1.6 V < (VeREF+ − VREF−/VeREF−) min ≤ [V(AVCC)]}
2.2 V/3 V
ED
Differential linearity
error
(VeREF+ − VREF−/VeREF−)min ≤ (VeREF+ − VREF−/VeREF−),
CVREF+ = 10 µF (tantalum) and 100 nF (ceramic)
2.2 V/3 V
EO Offset error
(VeREF+ − VREF−/VeREF−)min ≤ (VeREF+ − VREF−/VeREF−),
Internal impedance of source RS < 100 Ω,
2.2 V/3 V
CVREF+ = 10 µF (tantalum) and 100 nF (ceramic)
EG Gain error
(VeREF+ − VREF−/VeREF−)min ≤ (VeREF+ − VREF−/VeREF−),
CVREF+ = 10 µF (tantalum) and 100 nF (ceramic)
2.2 V/3 V
ET
Total unadjusted
error
(VeREF+ − VREF−/VeREF−)min ≤ (VeREF+ − VREF−/VeREF−),
CVREF+ = 10 µF (tantalum) and 100 nF (ceramic)
2.2 V/3 V
±2
±1.7 ^LSB
±1 LSB
±2 ±4 LSB
±1.1 ±2 LSB
±2 ±5 LSB
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