Parts List/Tune Up Info

24
CC2642R
SWRS194G JANUARY 2018 REVISED APRIL 2020
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Specifications
Copyright © 2018–2020, Texas Instruments Incorporated
5.13.2 DAC
(1) Keysight 34401A Multimeter
(2) A load > 20 pF will increases the settling time
(3) 1 LSB (V
REF
3.8 V/3.0 V/1.8 V/DCOUPL/ADCREF) = 14.10 mV/11.13 mV/6.68 mV/4.67 mV/5.48 mV
(4) Includes comparator offset
Table 5-11. Digital-to-Analog Converter (DAC) Characteristics
T
c
=2C,V
DDS
= 3.0 V, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
General Parameters
Resolution 8Bits
V
DDS
Supply voltage
Any load, any V
REF
, pre-charge OFF, DAC charge-pump ON 1.8 3.8
V
External Load
(1)
,anyV
REF
, pre-charge OFF, DAC charge-
pump OFF
2.0 3.8
Any load, V
REF
= DCOUPL, pre-charge ON 2.6 3.8
F
DAC
Clock frequency
Buffer ON (recommended for external load) 16 250
kHz
Buffer OFF (internal load) 16 1000
Voltage output settling time
V
REF
= VDDS, buffer OFF, internal load 13
1/F
DAC
V
REF
= VDDS, buffer ON, external capacitive load = 20 pF
(2)
13.8
External capacitive load 20 200 pF
External resistive load 10 Mȍ
Short circuit current 400 μA
Z
MAX
Max output impedance Vref
= VDDS, buffer ON, CLK
250 kHz
VDDS = 3.8 V, DAC charge-pump OFF 50.8
kȍ
VDDS = 3.0 V, DAC charge-pump ON 51.7
VDDS = 3.0 V, DAC charge-pump OFF 53.2
VDDS = 2.0 V, DAC charge-pump ON 48.7
VDDS = 2.0 V, DAC charge-pump OFF 70.2
VDDS = 1.8 V, DAC charge-pump ON 46.3
VDDS = 1.8 V, DAC charge-pump OFF 88.9
Internal Load - Continuous Time Comparator / Low Power Clocked Comparator
DNL
Differential nonlinearity
V
REF
= VDDS,
load = Continuous Time Comparator or Low Power Clocked
Comparator
F
DAC
= 250 kHz
±1
LSB
(3)
Differential nonlinearity
V
REF
= VDDS,
load = Continuous Time Comparator or Low Power Clocked
Comparator
F
DAC
=16kHz
±1.2
Offset error
(4)
Load = Continuous Time
Comparator
V
REF
= VDDS = 3.8 V ±0.64
LSB
(3)
V
REF
= VDDS = 3.0 V ±0.81
V
REF
= VDDS = 1.8 V ±1.27
V
REF
= DCOUPL, pre-charge ON ±3.43
V
REF
= DCOUPL, pre-charge OFF ±2.88
V
REF
= ADCREF ±2.37
Offset error
(4)
Load = Low Power Clocked
Comparator
V
REF
= VDDS = 3.8 V ±0.78
LSB
(3)
V
REF
= VDDS = 3.0 V ±0.77
V
REF
= VDDS = 1.8 V ±3.46
V
REF
= DCOUPL, pre-charge ON ±3.44
V
REF
= DCOUPL, pre-charge OFF ±4.70
V
REF
= ADCREF ±4.11
Max code output voltage
variation
(4)
Load = Continuous Time
Comparator
V
REF
= VDDS = 3.8 V ±1.53
LSB
(3)
V
REF
= VDDS = 3.0 V ±1.71
V
REF
= VDDS = 1.8 V ±2.10
V
REF
= DCOUPL, pre-charge ON ±6.00
V
REF
= DCOUPL, pre-charge OFF ±3.85
V
REF
= ADCREF ±5.84