MSP430F2619S-HT Datasheet, PDF (65/90 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F2619S-HT
www.ti.com
SLAS697B – MARCH 2010 – REVISED JUNE 2011
12-Bit DAC Linearity Parameters – Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
Resolution
TEST CONDITIONS
12-bit monotonic
V_CC
MIN TYP
12
INL
Integral nonlinearity⁽¹⁾
V_REF = 1.5 V
DAC12AMPx = 7, DAC12IR = 1
V_REF = 2.5 V
DAC12AMPx = 7, DAC12IR = 1
±2
2.2 V/3 V
±2
DNL
Differential nonlinearity⁽¹⁾
V_REF = 1.5 V
DAC12AMPx = 7, DAC12IR = 1
V_REF = 2.5 V
DAC12AMPx = 7, DAC12IR = 1
±0.4
2.2 V/3 V
±0.4
Offset voltage without
calibration ^{(1) (2)}
E_O
Offset voltage with
calibration ^{(1) (2)}
V_REF = 1.5 V
DAC12AMPx = 7, DAC12IR = 1
V_REF = 2.5 V
DAC12AMPx = 7, DAC12IR = 1
V_REF = 1.5 V
DAC12AMPx = 7, DAC12IR = 1
V_REF = 2.5 V
DAC12AMPx = 7, DAC12IR = 1
±21
±21
2.2 V/3 V
d_E(O)/d_T
Offset error temperature
coefficient ⁽¹⁾
30
E_G
Gain error⁽¹⁾
d_E(G)/d_T
Gain temperature
coefficient ⁽¹⁾
V_REF = 1.5 V
V_REF = 2.5 V
2.2 V/3 V
10
t_{Offset_Cal} Time for offset calibration⁽³⁾
DAC12AMPx = 2
DAC12AMPx = 3, 5
DAC12AMPx = 4, 6, 7
2.2 V/3 V
MAX UNIT
bits
±8
LSB
±8
±1
LSB
±1
LSB
±3.5
±3.5
µV/°C
±3.5
LSB
±3.5
ppm of
FSR/°C
100
32 LSB
6
(1) Parameters calculated from the best-fit curve from 0x0A to 0xFFF. The best-fit curve method is used to deliver coefficients “a” and “b” of
the first-order equation: y = a + b × x. V_{DAC12_xOUT} = E_O + (1 + E_G) × (V_eREF+/4095) × DAC12_xDAT, DAC12IR = 1.
(2) The offset calibration works on the output operational amplifier. Offset calibration is triggered setting bit DAC12CALON.
(3) The offset calibration can be done if DAC12AMPx = {2, 3, 4, 5, 6, 7}. The output operational amplifier is switched off with
DAC12AMPx={0, 1}.The DAC12 module should be configured prior to initiating calibration. Port activity during calibration may affect
accuracy and is not recommended.
DAC Output
RLoad =
CLoad = 100pF
AV _CC
2
DAC V _OUT
V _R+
Ideal transfer
function
Offset Error
Positive
Negative
Gain Error
DAC Code
Figure 42. Linearity Test Load Conditions and Gain/Offset Definition
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