MSP430G2231-EP_16 Datasheet, PDF (27/46 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430G2231-EP
www.ti.com
SLAS862 – JUNE 2012
10-Bit ADC, Built-In Voltage Reference
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_CC,REF+
V_REF+
I_LD,VREF+
C_VREF+
PARAMETER
Positive built-in reference
analog supply voltage range
Positive built-in reference
voltage
Maximum VREF+ load
current ^{(1) (2)}
VREF+ load regulation⁽¹⁾
V_REF+ load regulation response
time^{(1) (2)}
Maximum capacitance at pin
VREF+^{(1) (2)}
TEST CONDITIONS
I_VREF+ ≤ 1 mA, REF2_5V = 0
I_VREF+ ≤ 1 mA, REF2_5V = 1
I_VREF+ ≤ I_VREF+max, REF2_5V = 0
I_VREF+ ≤ I_VREF+max, REF2_5V = 1
I_VREF+ = 500 µA ± 100 µA,
Analog input voltage V_Ax ≉ 0.75 V,
REF2_5V = 0
I_VREF+ = 500 µA ± 100 µA,
Analog input voltage V_Ax ≉ 1.25 V,
REF2_5V = 1
I_VREF+ = 100 µA→900 µA,
V_Ax ≉ 0.5 × VREF+,
Error of conversion result ≤ 1 LSB,
ADC10SR = 0
I_VREF+ ≤ ±1 mA, REFON = 1, REFOUT = 1
V_CC
MIN TYP
2.2
3
1.4
1.5
3V
2.34
2.5
3V
3V
3V
3V
TC_REF+
t_REFON
t_REFBURST
Temperature coefficient
I_VREF+ = const with 0 mA ≤ I_VREF+ ≤ 1 mA
Settling time of internal
reference voltage to 99.9%
VREF^{(1) (2)}
Settling time of reference buffer
to 99.9% VREF⁽¹⁾⁽²⁾
I_VREF+ = 0.5 mA, REF2_5V = 0,
REFON = 0 → 1
I_VREF+ = 0.5 mA,
REF2_5V = 1, REFON = 1,
REFBURST = 1, ADC10SR = 0
3V
3.6 V
3V
(1) Minimum and maximum parameters are characterized up to T_A = 105°C, unless otherwise noted.
(2) Characterized at T_A = -40°C to 105°C only.
MAX UNIT
V
1.59
V
2.65
±1 mA
±2
LSB
±2
400 ns
100 pF
±190
ppm/
°C
30 µs
2 µs
Copyright © 2012, Texas Instruments Incorporated
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