MSP430X461X1 Datasheet, PDF (55/92 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x461x1, MSP430x461x
MIXED SIGNAL MICROCONTROLLER
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
12-bit ADC, timing parameters
PARAMETER
f_ADC12CLK
TEST CONDITIONS
V_CC
MIN
TYP
For specified performance of ADC12
linearity parameters
2.2V/3 V
0.45
5
MAX UNIT
6.3 MHz
f_ADC12OSC
t_CONVERT
t_ADC12ON
Internal ADC12
oscillator
Conversion time
Turn on settling time of
the ADC
ADC12DIV=0,
f_ADC12CLK=f_ADC12OSC
C_VREF+ ≥ 5 µF, Internal oscillator,
f_ADC12OSC = 3.7 MHz to 6.3 MHz
External f_ADC12CLK from ACLK,
MCLK, or SMCLK, ADC12SSEL ≠ 0
See Note 1
2.2 V/ 3 V
3.7
5
6.3 MHz
2.2 V/ 3 V 2.06
3.51 µs
13×ADC12DIV×
1/f_ADC12CLK
µs
100 ns
R_S = 400 Ω, R_I = 1000 Ω,
3V
1220
t_Sample
Sampling time
C_I = 30 pF, τ = [R_S + R_I] x C_I,
ns
(see Note 2)
2.2 V
1400
NOTES:
1. The condition is that the error in a conversion started after t_ADC12ON 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:
t_Sample = ln(2ⁿ⁺¹) x (R_S + R_I) x C_I+ 800 ns where n = ADC resolution = 12, R_S = external source resistance.
12-bit ADC, linearity parameters
PARAMETER
TEST CONDITIONS
1.4 V ≤ (V_eREF+ − V_REF−/V_eREF−) min ≤ 1.6 V
E_I
Integral linearity error
1.6 V < (V_eREF+ − V_REF−/V_eREF−) min ≤ [V_AVCC]
Differential linearity
E_{D error}
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
C_VREF+ = 10 µF (tantalum) and 100 nF (ceramic)
E_O Offset error
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
Internal impedance of source R_S < 100 Ω,
C_VREF+ = 10 µF (tantalum) and 100 nF (ceramic)
E_G Gain error
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
C_VREF+ = 10 µF (tantalum) and 100 nF (ceramic)
E_T
Total unadjusted
error
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
C_VREF+ = 10 µF (tantalum) and 100 nF (ceramic)
V_CC
2.2 V/3 V
2.2 V/3 V
MIN TYP
MAX
±2
±1.7
±1
UNIT
LSB
LSB
2.2 V/3 V
±2 ±4 LSB
2.2 V/3 V
2.2 V/3 V
±1.1 ±2 LSB
±2 ±5 LSB
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