Texas Instruments IC MCU 16B MSP430F2232TDA TSSOP-38 TID MSP430F2232TDA 데이터 시트
제품 코드
MSP430F2232TDA
MSP430F22x2
MSP430F22x4
MSP430F22x4
SLAS504G – JULY 2006 – REVISED AUGUST 2012
10-Bit ADC, External Reference
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
MAX
UNIT
V
eREF+
> V
eREF-
,
1.4
V
CC
SREF1 = 1, SREF0 = 0
Positive external reference input
V
eREF+
V
voltage range
(2)
V
eREF-
≤
V
eREF+
≤
V
CC
- 0.15 V,
1.4
3
SREF1 = 1, SREF0 = 1
(3)
Negative external reference input
V
eREF-
V
eREF+
> V
eREF-
0
1.2
V
voltage range
(4)
Differential external reference
Δ
V
eREF
input voltage range
V
eREF+
> V
eREF-
(5)
1.4
V
CC
V
Δ
V
eREF
= V
eREF+
- V
eREF-
0 V
≤
V
eREF+
≤
V
CC
,
±1
SREF1 = 1, SREF0 = 0
I
VeREF+
Static input current into V
eREF+
2.2 V, 3 V
µA
0 V
≤
V
eREF+
≤
V
CC
- 0.15 V
≤
3 V,
0
SREF1 = 1, SREF0 = 1
(3)
I
VeREF-
Static input current into V
eREF-
0 V
≤
V
eREF-
≤
V
CC
2.2 V, 3 V
±1
µA
(1)
The external reference is used during conversion to charge and discharge the capacitance array. The input capacitance, CI, is also the
dynamic load for an external reference during conversion. The dynamic impedance of the reference supply should follow the
recommendations on analog-source impedance to allow the charge to settle for 10-bit accuracy.
dynamic load for an external reference during conversion. The dynamic impedance of the reference supply should follow the
recommendations on analog-source impedance to allow the charge to settle for 10-bit accuracy.
(2)
The accuracy limits the minimum positive external reference voltage. Lower reference voltage levels may be applied with reduced
accuracy requirements.
accuracy requirements.
(3)
Under this condition, the external reference is internally buffered. The reference buffer is active and requires the reference buffer supply
current I
current I
REFB
. The current consumption can be limited to the sample and conversion period with REBURST = 1.
(4)
The accuracy limits the maximum negative external reference voltage. Higher reference voltage levels may be applied with reduced
accuracy requirements.
accuracy requirements.
(5)
The accuracy limits the minimum external differential reference voltage. Lower differential reference voltage levels may be applied with
reduced accuracy requirements.
reduced accuracy requirements.
10-Bit ADC, Timing Parameters
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
ADC10SR = 0
0.45
6.3
ADC10 input clock
For specified performance of
f
ADC10CLK
2.2 V, 3 V
MHz
frequency
ADC10 linearity parameters
ADC10SR = 1
0.45
1.5
ADC10 built-in oscillator
ADC10DIVx = 0, ADC10SSELx = 0,
f
ADC10OSC
2.2 V, 3 V
3.7
6.3
MHz
frequency
f
ADC10CLK
= f
ADC10OSC
ADC10 built-in oscillator, ADC10SSELx = 0,
2.2 V, 3 V
2.06
3.51
f
ADC10CLK
= f
ADC10OSC
t
CONVERT
Conversion time
µs
f
ADC10CLK
from ACLK, MCLK or SMCLK,
13 × ADC10DIVx ×
ADC10SSELx
≠
0
1 / f
ADC10CLK
Turn on settling time of
t
ADC10ON
100
ns
the ADC
(1)
(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.
50
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