MSP430X11X2 Datasheet, PDF (27/47 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x11x2, MSP430x12x2
MIXED SIGNAL MICROCONTROLLER
SLAS361D − JANUARY 2002 − REVISED AUGUST 2004
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
10-bit ADC, timing parameters
PARAMETER
f_ADC10CLK
TEST CONDITIONS
For specified performance of
ADC10 linearity parameters
ADC10SR = 0
ADC10SR = 1
MIN
0.450
0.450
NOM
MAX
6.3
1.5
UNIT
MHz
f_ADC10OSC
t_CONVERT
t_ADC10ON^‡
Conversion time
Turn on settling time of
the ADC
ADC10DIV=0,
f_ADC10CLK=f_ADC10OSC
Internal oscillator,
f_ADC10OSC = 3.7 MHz to
6.3 MHz
V_CC =
2.2 V/ 3V
V_CC =
2.2 V/ 3 V
External f_ADC10CLK from ACLK, MCLK or SMCLK:
ADC10SSEL ≠ 0
(see Note 1)
3.7
2.06
13×ADC10DIV×
1/f_ADC10CLK
6.3 MHz
3.51 µs
µs
100 ns
t_Sample^‡
Sampling time
R_S = 400 Ω, R_I = 2000 Ω,
C_I = 20 pF (see Note 2)
V_CC = 3 V
V_CC = 2.2 V
1400
1400
ns
† _{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_ADC10ON is less than ±0.5 LSB. The reference and input signal are already
settled.
2. Approximately eight 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. (ADC10SR = 0, n = ADC resolution = 10, R_S = external source resistance)
t_Sample = ln(2ⁿ⁺¹) x (R_S + R_I) x C_I+ 2.5 µs. (ADC10SR = 1, n = ADC resolution = 10, R_S = external source resistance)
10-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_CC]
E_D
Differential linearity
error
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−)
V_CC
2.2 V/3 V
2.2 V/3 V
MIN NOM
MAX
±1
±1
±1
UNIT
LSB
LSB
E_O Offset error
E_G Gain error
E_T
Total unadjusted
error
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
Internal impedance of source R_S < 100 Ω,
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
(V_eREF+ − V_REF−/V_eREF−)_min ≤ (V_eREF+ − V_REF−/V_eREF−),
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
±2 ±4 LSB
±1.1 ±2 LSB
±2 ±5 LSB
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