MSP430F1122 Datasheet, PDF (28/48 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x11x2, MSP430x12x2
MIXED SIGNAL MICROCONTROLLER
SLAS361C − JANUARY 2002 − REVISED DECEMBER 2003
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
10-bit ADC, temperature sensor and built-in V_MID
PARAMETER
TEST CONDITIONS
MIN NOM
MAX UNIT
ISENSOR
Operating supply current into
VCC terminal (see Note 1)
REFON = 0, INCH = 0Ah,
ADC10ON=NA, TA = 25_C
2.2 V
3V
40
120
µA
60
160
VSENSOR†
ADC10ON = 1, INCH = 0Ah,
TA = 0°C
2.2 V
3V
986 986±5%
mV
986 986±5%
TCSENSOR†
ADC10ON = 1, INCH = 0Ah
2.2 V
3V
3.55 3.55±3%
mV/°C
3.55 3.55±3%
tSENSOR(sample)†
Sample time required if channel
10 is selected (see Note 2)
ADC10ON = 1, INCH = 0Ah,
2.2 V
Error of conversion result ≤ 1 LSB _{3 V}
30
30
µs
IVMID
Current into divider at channel 11
(see Note 3)
ADC10ON = 1, INCH = 0Bh,
2.2 V
3V
NA
µA
NA
VMID
VCC divider at channel 11
ADC10ON = 1, INCH = 0Bh,
VMID is ~0.5 x VCC
2.2 V
3V
1.1 1.1±0.04
V
1.5 1.50±0.04
tVMID(sample)
Sample time required if channel ADC10ON = 1, INCH = 0Bh,
2.2 V 1400
11 is selected (see Note 4)
Error of conversion result ≤ 1 LSB _{3 V 1220}
ns
† _{Not production tested, limits characterized}
NOTES: 1. The sensor current ISENSOR is consumed if (ADC10ON = 1 and REFON = 1), or (ADC10ON=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 tSENSOR(on).
3. No additional current is needed. The VMID is used during sampling.
4. The on-time tVMID(on) is included in the sampling time tVMID(sample); no additional on time is needed.
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