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SLAS826F – MARCH 2015 – REVISED MARCH 2017
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Specifications
Copyright © 2015–2017, Texas Instruments Incorporated
5.25.6 14-Bit ADC
lists the power supply and input range conditions for the ADC.
(1)
The analog input voltage range must be within the selected reference voltage range V
R+
to V
R-
for valid conversion results.
(2)
The internal reference supply current is not included in current consumption parameter I
(ADC14)
.
(3)
Represents only the ADC switching capacitance. See the digital inputs electrical specification for internal parasitic pin capacitance.
Table 5-26. 14-Bit ADC, Power Supply and Input Range Conditions
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
NOM
MAX
UNIT
AV
CC
Analog supply voltage
AVCC and DVCC are connected together,
AVSS and DVSS are connected together,
V(AVSS) = V(DVSS) = 0 V,
ADC14PWRMD = 2
1.62
3.7
V
AV
CC
Analog supply voltage
AVCC and DVCC are connected together,
AVSS and DVSS are connected together,
V(AVSS) = V(DVSS) = 0 V,
ADC14PWRMD = 0
1.8
3.7
V
V(Ax)
Analog input voltage
range
(1)
All ADC analog input pins Ax
0
AVCC
V
V
CM
Input common-mode range
All ADC analog input pins Ax (ADC14DIF = 1)
0
VREF
/ 2
VREF
V
I
(ADC14)
single-ended
mode
Operating supply current
into AVCC and DVCC
terminals
(2)
f
ADC14CLK
= 25 MHz,
1 Msps (ADC14PWRMD = 0),
ADC14ON = 1, ADC14DIF = 0,
ADC14VRSEL = 0xE, REFON = 0,
ADC14SHT0x = 0x0, ADC14SHT1x = 0x0
3.0 V
490
640
µA
2.2 V
450
580
f
ADC14CLK
= 5 MHz,
200 ksps (ADC14PWRMD = 2),
ADC14ON = 1, ADC14DIF = 0,
ADC14VRSEL = 0xE, REFON = 0,
ADC14SHT0x = 0x0, ADC14SHT1x = 0x0
3.0 V
215
270
2.2 V
210
260
I
(ADC14)
differential
mode
Operating supply current
into AVCC and DVCC
terminals
(2)
f
ADC14CLK
= 25 MHz,
1 Msps (ADC14PWRMD = 0),
ADC14ON = 1, ADC14DIF = 1,
ADC14VRSEL = 0xE, REFON = 0,
ADC14SHT0x = 0x0, ADC14SHT1x = 0x0
3.0 V
690
875
µA
2.2 V
620
785
f
ADC14CLK
= 5 MHz,
200 ksps (ADC14PWRMD = 2),
ADC14ON = 1, ADC14DIF = 1,
ADC14VRSEL = 0xE, REFON = 0,
ADC14SHT0x = 0x0, ADC14SHT1x = 0x0
3.0 V
275
335
2.2 V
260
320
C
I
Input capacitance into a
single terminal
(3)
12
15
pF
R
I
Input MUX ON-resistance
0 V
≤
V(Ax)
≤
AVCC
1.8 V to
3.7 V
0.135
1
k
Ω
1.62 V to
<1.8 V
0.15
1.5