Datasheet

MSP430x43x1, MSP430x43x, MSP430x44x1, MSP430x44x
MIXED SIGNAL MICROCONTROLLER
SLAS344G − JANUARY 2002 − REVISED OCTOBER 2009
55
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
12-bit ADC, temperature sensor and built-in V
MID
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
I
Operatin
g
suppl
y
current into REFON = 0, INCH = 0Ah,
2.2 V 40 120
A
I
SENSOR
Operating
supply
current
into
AV
CC
terminal (see Note 1)
REFON
=
0
,
INCH
=
0Ah
,
ADC12ON=NA, T
A
= 25_C
3 V 60 160
µA
V
ADC12ON = 1, INCH = 0Ah,
2.2 V 986 986±5%
mV
V
SENSOR
ADC12ON
=
1
,
INCH
=
0Ah
,
T
A
= 0°C
3 V 986 986±5%
mV
TC
ADC12ON 1 INCH 0Ah
2.2 V 3.55 3.55±3%
mV/°C
TC
SENSOR
ADC12ON = 1, INCH = 0Ah
3 V 3.55 3.55±3%
mV/°C
t
Sample time required if channel ADC12ON = 1, INCH = 0Ah,
2.2 V 30
s
t
SENSOR(sample)
Sample
time
required
if
channel
10 is selected (see Note 2)
ADC12ON
=
1
,
INCH
=
0Ah
,
Error of conversion result ≤ 1 LSB
3 V 30
µs
I
Current into divider at channel 11
ADC12ON = 1, INCH = 0Bh,
2.2 V NA
A
I
VMID
Current into divider at channel 11
ADC12ON
=
1
,
INCH
=
0Bh
,
(see Note 3)
3 V NA
µA
V
AV divider at channel 11
ADC12ON = 1, INCH = 0Bh,
2.2 V 1.1 1.1±0.04
V
V
MID
AV
CC
divider at channel 11
ADC12ON
=
1
,
INCH
=
0Bh
,
V
MID
is ~0.5 x V
AVCC
3 V 1.5 1.50±0.04
V
t
Sample time required if channel ADC12ON = 1, INCH = 0Bh,
2.2 V 1400
ns
t
VMID(sample)
Sample
time
required
if
channel
11 is selected (see Note 4)
ADC12ON
=
1
,
INCH
=
0Bh
,
Error of conversion result ≤ 1 LSB
3 V 1220
ns
NOTES: 1. The sensor current I
SENSOR
is consumed if (ADC12ON = 1 and REFON=1), or (ADC12ON=1 AND INCH=0Ah and sample signal
is high). Therefore it includes the constant current through the sensor and the reference.
2. The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t
SENSOR(on)
.
3. No additional current is needed. The V
MID
is used during sampling.
4. The on-time t
VMID(on)
is included in the sampling time t
VMID(sample)
; no additional on time is needed.