MSP430FG4619, MSP430FG4618, MSP430FG4617, MSP430FG4616
MSP430CG4619, MSP430CG4618, MSP430CG4617, MSP430CG4616
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SLAS508J – APRIL 2006 – REVISED JUNE 2015
5.30
12-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
For specified performance of ADC12
f
ADC12CLK
2.2 V, 3 V
0.45
5
6.3
MHz
linearity parameters
Internal ADC12
ADC12DIV = 0,
f
ADC12OSC
2.2 V, 3 V
3.7
5
6.3
MHz
oscillator
f
ADC12CLK
= f
ADC12OSC
C
VREF+
≥
5 µF, Internal oscillator,
2.2 V, 3 V
2.06
3.51
f
ADC12OSC
= 3.7 MHz to 6.3 MHz
t
CONVERT
Conversion time
µs
External f
ADC12CLK
from ACLK, MCLK, or
13 × ADC12DIV
SMCLK,
× 1/f
ADC12CLK
ADC12SSEL
≠
0
Turnon settling time
t
ADC12ON
(1)
100
ns
of the ADC
3 V
1220
R
S
= 400
Ω
,R
I
= 1000
Ω
,
t
Sample
Sampling time
ns
C
I
= 30pF,
τ
= [RS +RI] × C
I
(2)
2.2 V
1400
(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(2
n+1
) × (R
S
+ R
I
) x C
I
+ 800 ns where n = ADC resolution = 12, R
S
= external source resistance.
5.31
12-Bit ADC, Linearity Parameters
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
1.4 V
≤
(Ve
REF+
– V
REF–
/Ve
REF–
) min
≤
1.6 V
±2
Integral linearity
E
I
2.2 V, 3 V
LSB
error
1.6 V < (Ve
REF+
– V
REF–
/Ve
REF–
) min
≤
[V
AVCC
]
±1.7
Differential linearity
(Ve
REF+
– V
REF–
/Ve
REF–
) min
≤
(Ve
REF+
– V
REF–
/Ve
REF–
),
E
D
2.2 V, 3 V
±1
LSB
error
C
VREF+
= 10 µF (tantalum) and 100 nF (ceramic)
(Ve
REF+
– V
REF–
/Ve
REF–
) min
≤
(Ve
REF+
– V
REF–
/Ve
REF–
),
E
O
Offset error
Internal impedance of source RS < 100
Ω
,
2.2 V, 3 V
±2
±4
LSB
C
VREF+
= 10 µF (tantalum) and 100 nF (ceramic)
(Ve
REF+
– V
REF–
/Ve
REF–
)min
≤
(Ve
REF+
– V
REF–
/Ve
REF–
),
E
G
Gain error
2.2 V, 3 V
±1.1
±2
LSB
C
VREF+
= 10 µF (tantalum) and 100 nF (ceramic)
Total unadjusted
(Ve
REF+
-– V
REF–
/Ve
REF–
)min
≤
(Ve
REF+
–V
REF–
/Ve
REF–
),
E
T
2.2 V, 3 V
±2
±5
LSB
error
CVREF+ = 10 µF (tantalum) and 100 nF (ceramic)
Copyright © 2006–2015, Texas Instruments Incorporated
Specifications
37
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