MSP430FG439 Datasheet, PDF (31/88 Pages) Texas Instruments – Mixed-Signal Microcontrollers

www.ti.com
MSP430FG439, MSP430FG438, MSP430FG437
SLAS380D – APRIL 2004 – REVISED NOVEMBER 2014
5.27 12-Bit ADC, Temperature Sensor and Built-In V_MID
over recommended operating free-air temperature range (unless otherwise noted)
I_SENSOR
PARAMETER
TEST CONDITIONS
Operating supply current into REFON = 0, INCH = 0Ah,
AV_CC terminal⁽¹⁾
ADC12ON = NA, T_A = 25°C
V_CC
MIN
2.2 V
3V
TYP
MAX UNIT
40
120
µA
60
160
V_SENSOR
TC_SENSOR
See ⁽²⁾
ADC12ON = 1, INCH = 0Ah,
T_A = 0°C
ADC12ON = 1, INCH = 0Ah
2.2 V,
3V
2.2 V,
3V
986
3.55 ± 3%
mV
mV/°C
t_{SENSOR(sample)}
Sample time required if
channel 10 is selected⁽³⁾
ADC12ON = 1, INCH = 0Ah,
Error of conversion result ≤ 1 LSB
2.2 V
3V
30
30
µs
I_VMID
Current into divider at
channel 11⁽⁴⁾
ADC12ON = 1, INCH = 0Bh
2.2 V
3V
NA
µA
NA
V_MID
AV_CC divider at channel 11
ADC12ON = 1, INCH = 0Bh,
V_MID ≈ 0.5 × V_AVCC
2.2 V
3V
1.1
1.10 ±
0.04
V
1.5
1.50 ±
0.04
t_VMID(sample)
Sample time required if
channel 11 is selected⁽⁵⁾
ADC12ON = 1, INCH = 0Bh,
Error of conversion result ≤ 1 LSB
2.2 V
3V
1400
1220
ns
(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.
5.28 12-Bit DAC, Supply Specifications
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
AV_CC Analog supply voltage
TEST CONDITIONS
AV_CC = DV_CC, AV_SS = DV_SS = 0 V
DAC12AMPx = 2, DAC12IR = 0,
DAC12_xDAT = 0800h
V_CC
MIN TYP MAX UNIT
2.2
3.6 V
50 110
I_DD
PSRR
Supply current, single DAC
channel^{(1) (2)}
Power-supply rejection ratio^{(3) (4)}
DAC12AMPx = 2, DAC12IR = 1,
DAC12_xDAT = 0800h , V_eREF+ = V_REF+ = AV_CC
DAC12AMPx = 5, DAC12IR = 1,
DAC12_xDAT = 0800h, V_eREF+ = V_REF+ = AV_CC
DAC12AMPx = 7, DAC12IR = 1,
DAC12_xDAT = 0800h, V_eREF+ = V_REF+ = AV_CC
DAC12_xDAT = 0800h, V_REF = 1.5 V,
ΔAV_CC = 100 mV
DAC12_xDAT = 0800h, V_REF = 1.5 V or 2.5 V,
ΔAV_CC = 100 mV
2.2 V,
3V
2.2 V
3V
50 110
µA
200 440
700 1500
70
dB
(1) No load at the output pin, DAC0 or DAC1, 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.
Copyright © 2004–2014, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: MSP430FG439 MSP430FG438 MSP430FG437
Specifications
31