Datasheet

MSP430F6638, MSP430F6637, MSP430F6636
MSP430F6635, MSP430F6634, MSP430F6633
MSP430F6632, MSP430F6631, MSP430F6630
SLAS566D –JUNE 2010–REVISED AUGUST 2013 www.ti.com
REF, Built-In Reference (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
AV
CC
= AV
CC(min)
- AV
CC(max)
,
REFVSEL = {0, 1, 2}, REFOUT = 0, 75
REFON = 0 → 1
Settling time of reference
t
SETTLE
µs
AV
CC
= AV
CC(min)
- AV
CC(max)
,
voltage
(8)
C
VREF
= C
VREF
(max),
75
REFVSEL = {0, 1, 2}, REFOUT = 1,
REFON = 0 → 1
(8) The condition is that the error in a conversion started after t
REFON
is less than ± 0.5 LSB. The settling time depends on the external
capacitive load when REFOUT = 1.
12-Bit DAC, Supply Specifications
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
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,
DAC12OG = 1,
3 V 65 110
DAC12_xDAT = 0800h,
VeREF+ = VREF+ = 1.5 V
DAC12AMPx = 2, DAC12IR = 1,
DAC12_xDAT = 0800h, 125 165
VeREF+ = VREF+ = AV
CC
I
DD
Supply current, single DAC channel
(1) (2)
µA
DAC12AMPx = 5, DAC12IR = 1,
DAC12_xDAT = 0800h, 2.2 V, 3 V 250 350
VeREF+ = VREF+ = AV
CC
DAC12AMPx = 7, DAC12IR = 1,
DAC12_xDAT = 0800h, 750 1100
VeREF+ = VREF+ = AV
CC
DAC12_xDAT = 800h,
2.2 V 70
VeREF+ = 1.5 V, ΔAV
CC
= 100 mV
PSRR Power supply rejection ratio
(3) (4)
dB
DAC12_xDAT = 800h,
VeREF+ = 1.5 V or 2.5 V, 3 V 70
ΔAV
CC
= 100 mV
(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) The internal reference is not used.
12-Bit DAC, Linearity Specifications
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 18)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
Resolution 12-bit monotonic 12 bits
VeREF+ = 1.5 V, DAC12AMPx = 7, DAC12IR = 1 2.2 V ±2 ±4
(2)
Integral
INL LSB
nonlinearity
(1)
VeREF+ = 2.5 V, DAC12AMPx = 7, DAC12IR = 1 3 V ±2 ±4
VeREF+ = 1.5 V, DAC12AMPx = 7, DAC12IR = 1 2.2 V ±0.4 ±1
(2)
Differential
DNL LSB
nonlinearity
(1)
VeREF+ = 2.5 V, DAC12AMPx = 7, DAC12IR = 1 3 V ±0.4 ±1
(1) Parameters calculated from the best-fit curve from 0x0F to 0xFFF. The best-fit curve method is used to deliver coefficients "a" and "b" of
the first-order equation: y = a + bx. V
DAC12_xOUT
= E
O
+ (1 + E
G
) × (VeREF+/4095) × DAC12_xDAT, DAC12IR = 1.
(2) This parameter is not production tested.
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