Datasheet
MAX1020/MAX1022/MAX1057/MAX1058
10-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
______________________________________________________________________________________ 17
Pin Description (continued)
MAX1020
MAX1022
MAX1057/
MAX1058
NAME FUNCTION
26 26 35 REF1
Reference 1 Input. Reference voltage; leave unconnected to use the
internal reference (2.5V for the MAX1057 or 4.096V for the
MAX1020/MAX1022/MAX1058). REF1 is the positive reference in ADC
external differential reference mode. Bypass REF1 to AGND with a 0.1µF
capacitor in external reference mode only. See the ADC/DAC References
section.
27–31, 34
— — AIN0–AIN5 Analog Inputs
35 — — REF2/AIN6
Reference 2 Input/Analog-Input Channel 6. See Table 5 for details on
programming the setup register. REF2 is the negative reference in the
ADC external differential reference.
36 — — CNVST/AIN7
Active-Low Conversion-Start Input/Analog Input 7. See Table 5 for details
on programming the setup register.
—1—
CNVST/AIN11
Active-Low Conversion-Start Input/Analog Input 11. See Table 5 for
details on programming the setup register.
—
23, 25,
27–31,
33, 34, 35
— AIN0–AIN9 Analog Inputs
— 36 — REF2/AIN10
Reference 2 Input/Analog-Input Channel 10. See Table 5 for details on
programming the setup register. REF2 is the negative reference in the
ADC external differential reference.
—— 1
CNVST/AIN15
Active-Low Conversion-Start Input/Analog Input 15. See Table 5 for
details on programming the setup register.
——
2, 3, 5, 6 GPIOA0–GPIOA3
Gener al - P ur p ose I/O A0–A3. GP IOA0–GP IOA3 can si nk and sour ce 15m A.
——
16, 17,
20, 21
GPIOB0–GPIOB3
General-Purpose I/O B0–B3. GPIOB0–GPIOB3 can sink 4mA and
source 2mA.
— — 29–32
GP IOC 0–GP IOC 3
General-Purpose I/O C0–C3. GPIOC0–GPIOC3 can sink 4mA and
source 2mA.
——
33, 34,
36–47
AIN0–AIN13 Analog Inputs
— — 48 REF2/AIN14
Reference 2 Input/Analog-Input Channel 14. See Table 5 for details on
programming the setup register. REF2 is the negative reference in the
ADC external differential reference.
——— EP
Exposed Paddle. Must be externally connected to AGND. Do not use as
a ground connect.