Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
49
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
10-bit ADC, timing parameters
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
ADC10 input clock frequency
For specified
p
erformance of
ADC10SR=0
2 2 V/3 V
0.45 6.3
MHz
f
ADC10CLK
ADC10 input clock frequency
performance
of
ADC10 linearity
parameters
ADC10SR=1
2.2 V/3 V
0.45 1.5
MHz
f
ADC10OSC
ADC10 built-in oscillator frequency
ADC10DIVx = 0, ADC10SSELx = 0,
f
ADC10CLK
= f
ADC10OSC
2.2 V/3 V 3.7 6.3 MHz
t
Conversion time
ADC10 built-in oscillator,
ADC10SSELx = 0,
f
ADC10CLK
= f
ADC10OSC
2.2 V/3 V 2.06 3.51
μs
t
CONVERT
Conversion time
f
ADC10CLK
from ACLK, MCLK or
SMCLK, ADC10SSELx ≠ 0
13×
ADC10DIV×
1/f
ADC10CLK
μs
t
ADC10ON
Turn on settling time of the ADC (see Note 1) 100 ns
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.
10-bit ADC, linearity parameters
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
E
I
Integral linearity error 2.2 V/3 V ±1 LSB
E
D
Differential linearity error 2.2 V/3 V ±1 LSB
E
O
Offset error
Source impedance R
S
< 100 Ω, 2.2 V/3 V ±1 LSB
SREFx = 010, unbuffered external
reference, V
eREF+
= 1.5 V
2.2 V ±1.1 ±2
SREFx = 010, unbuffered external
reference, V
eREF+
= 2.5 V
3 V ±1.1 ±2
E
G
Gain error
SREFx = 011, buffered external
reference (see Note 1),
V
eREF+
= 1.5 V
2.2 V ±1.1 ±4
LSB
SREFx = 011, buffered external
reference (see Note 1),
V
eREF+
= 2.5 V
3 V ±1.1 ±3
SREFx = 010, unbuffered external
reference, V
eREF+
= 1.5 V
2.2 V ±2 ±5
SREFx = 010, unbuffered external
reference, V
eREF+
= 2.5 V
3 V ±2 ±5
E
T
Total unadjusted error
SREFx = 011, buffered external
reference (see Note 1),
V
eREF+
= 1.5 V
2.2 V ±2 ±7
LSB
SREFx = 011, buffered external
reference (see Note 1),
V
eREF+
= 2.5 V
3 V ±2 ±6
NOTES: 1. The reference buffer offset adds to the gain and total unadjusted error.