MSP430F15X_14 Datasheet, PDF (42/78 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F15x, MSP430F16x, MSP430F161x
MIXED SIGNAL MICROCONTROLLER
SLAS368G − OCTOBER 2002 − REVISED MARCH 2011
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
12-bit ADC, timing parameters
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
f_ADC12CLK
For specified performance of ADC12
linearity parameters
2.2V/3 V
0.45
5
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
2.2 V/ 3 V
C_VREF+ ≥ 5 μF, Internal oscillator,
f_ADC12OSC = 3.7 MHz to 6.3 MHz
2.2 V/ 3 V
External f_ADC12CLK from ACLK, MCLK or SMCLK:
ADC12SSEL ≠ 0
(see Note 1)
3.7
5
2.06
13×ADC12DIV×
1/f_ADC12CLK
6.3 MHz
3.51 μs
μs
100 ns
R_S = 400 Ω, R_I = 1000 Ω,
3V
1220
t_Sample‡
Sampling time
C_I = 30 pF
ns
τ = [R_S + R_I] x C_I;(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 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]
E_D
Differential linearity
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
E_G Gain 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)
(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)
2.2 V/3 V
2.2 V/3 V
MIN TYP
MAX
±2
±1.7
UNIT
LSB
±1 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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