MAX1258 Maxim Integrated Products, MAX1258 Datasheet - Page 17

• Manufacturer Part Number: MAX1258
• Description: Multichannel ADCs/DACs
• Manufacturer: Maxim Integrated Products

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MAX1220/
MAX1221
27–31, 34
26
35
36
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12-Bit, Multichannel ADCs/DACs with FIFO,
MAX1222/
MAX1223
33, 34, 35
23, 25,
27–31,
PIN
26
36
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1
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MAX1257/
MAX1258
Temperature Sensing, and GPIO Ports
2, 3, 5, 6
16, 17,
33, 34,
20, 21
29–32
36–47
35
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48
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1
GPIOA0–GPIOA Gener al - P ur p ose I/O A0–A3. GP IOA0–GP IOA3 can si nk and sour ce 15m A.
GPIOB0–GPIOB
GP IOC 0–GP IOC
CNVST/AIN11
CNVST/AIN15
CNVST/AIN7
REF2/AIN10
AIN0–AIN13
REF2/AIN14
AIN0–AIN5
REF2/AIN6
AIN0–AIN9
NAME
REF1
EP
3
3
Reference 1 Input. Reference voltage; leave unconnected to use the
internal reference (2.5V for the MAX1221/MAX1223/MAX1257 or 4.096V for
the MAX1220/MAX1222/MAX1258). 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.
Analog Inputs
Reference 2 Input/Analog-Input Channel 6. See Table 5 for details on
programming the setup register.
Active-Low Conversion-Start Input/Analog Input 7. See Table 5 for details
on programming the setup register. REF2 is the negative reference in the
ADC external differential reference mode.
Active-Low Conversion-Start Input/Analog Input 11. See Table 5 for details
on programming the setup register.
Analog Inputs
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 mode.
Active-Low Conversion-Start Input/Analog Input 15. See Table 5 for details
on programming the setup register.
General-Purpose I/O B0–B3. GPIOB0–GPIOB3 can sink 4mA and
source 2mA.
General-Purpose I/O C0–C3. GPIOC0–GPIOC3 can sink 4mA and
source 2mA.
Analog Inputs
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 mode.
Exposed Paddle. Must be externally connected to AGND. Do not use as a
ground connect.
Pin Description (continued)
FUNCTION
17