Datasheet

MSP430xG461x
MIXED SIGNAL MICROCONTROLLER
SLAS508I − APRIL 2006 − REVISED MARCH 2011
53
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 NOM 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
(see Note 2)
ADC12ON = 1, INCH = 0Ah, 2.2 V/
986
mV
V
SENSOR
(see Note 2)
ADC12ON
=
1
,
INCH
=
0Ah
,
T
A
= 0°C
2
.
2
V/
3 V
986 mV
TC
ADC12ON 1 INCH 0Ah
2.2 V/
355±3%
mV/°C
TC
SENSOR
ADC12ON = 1, INCH = 0Ah
2
.
2
V/
3 V
3.55±3% mV/°C
t
Sample time required if
channel 10 is selected
ADC12ON = 1, INCH = 0Ah,
2.2 V 30
s
t
SENSOR(sample)
channel 10 is selected
(see Note 3)
ADC12ON
=
1
,
INCH
=
0Ah
,
Error of conversion result ≤ 1 LSB
3 V 30
μs
I
Current into divider at
ADC12ON 1 INCH 0Bh
2.2 V NA
A
I
VMID
Current
into
divider
at
channel 11 (see Note 4)
ADC12ON = 1, INCH = 0Bh
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 11 is selected
ADC12ON = 1, INCH = 0Bh,
2.2 V 1400
ns
t
VMID(sample)
channel 11 is selected
(see Note 5)
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). When REFON = 1, I
SENSOR
is already included in I
REF+
.
2. The temperature sensor offset can be as much as ±20_C. A single-point calibration is recommended in order to minimize the offset
error of the built-in temperature sensor.
3. The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t
SENSOR(on)
4. No additional current is needed. The V
MID
is used during sampling.
5. The on-time t
VMID(on)
is included in the sampling time t
VMID(sample)
; no additional on time is needed.
12-bit DAC, supply specifications
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
AV
CC
Analog supply voltage
AV
CC =
DV
CC
,
AV
SS
= DV
SS
=0 V
2.20 3.60 V
DAC12AMPx=2, DAC12IR=0,
DAC12_xDAT=0800h
50 110
I
Supply current:
Single DAC Channel
DAC12AMPx=2, DAC12IR=1,
DAC12_xDAT=0800h
,
V
eREF+
=V
REF+
= AV
CC
2 2 V/3 V
50 110
A
I
DD
Single DAC Channel
(see Notes 1 and 2)
DAC12AMPx=5, DAC12IR=1,
DAC12_xDAT=0800h, V
eREF+
=V
REF+
= AV
CC
2.2 V/3 V
200 440
μA
DAC12AMPx=7, DAC12IR=1,
DAC12_xDAT=0800h, V
eREF+
=V
REF+
= AV
CC
700 1500
PSRR
Power-supply
rejection ratio
DAC12_xDAT = 800h, V
REF
= 1.5 V,
ΔAV
CC
= 100mV
2.2 V
70
dB
PSRR
rejection ratio
(see Notes 3 and 4)
DAC12_xDAT = 800h, V
REF
= 1.5 V or 2.5 V,
ΔAV
CC
= 100mV
3 V
70 dB
NOTES: 1. No load at the output pin, DAC12_0 or DAC12_1, assuming that the control bits for the shared pins are set properly.
2. Current into reference terminals not included. If DAC12IR = 1 current flows through the input divider; see Reference Input
specifications.
3. PSRR = 20*log{ΔAV
CC
/ΔV
DAC12_xOUT
}.
4. V
REF
is applied externally. The internal reference is not used.