Analog Devices MAX22005, Руководство пользователя

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MAX22005PMB#
Evaluates: MAX22005
Pmod Connector
The 12-pin Pmod connector (J1) meets the Pmod Interface
Type 2A (expanded SPI) standard. Figure 8 details the J1
Pmod connections on the MAX22005PMB#.
Power Supplies
Power is supplied to the MAX22005PMB# through the
J1 Pmod connector’s DVDD pins 6 and 12. DVDD from
the USB2PMB2# is 3.3V. The MAX22005 IC DVDD pins
are supplied directly from the J1 DVDD pins. AVDD is
supplied by DVDD through a Pi filter. HVDD and HVSS
are supplied by DVDD through a dual boost converter,
the MAX8614A. DGND and AGND are connected at one
point, the 0Ω R5 short. See Table 1 for the expected
values of each supply rail. The expected max current
consumption of the MAX22005PMB# is less than 40mA.
Analog Input Configuration
The MAX22005PMB# groups the MAX22005’s 12 analog
inputs into four sets of three consecutive inputs, called trip -
lets. Each triplet is connected as in Figure 9 , which is the
first triplet consisting of AI1, AI2, and AI3. The MAX14757
analog switch is used to insert the 49.9Ω precision resis -
tor for current mode measurements. Also, refer to the full
MAX22005PMB# schematic diagram to see the J2 and J3
connector to IC input pin connections in their entirety.
Table 1. Supply Voltages
Figure 9. Multifunctional Universal Triplet Input
Figure 8. MAX22005PMB# Pmod Connector Schematic
SUPPLY VOLTAGE
DVDD 3.3V ±0.1V
AVDD 3.3V ±0.1V
HVDD +15V ±0.5V
HVSS -15V ±0.5V
Pin 1 (CH 1)
Pin 2
Pin 3
AI1
AI2
AI3
GPIO0
J2
4.75k Ω
4.75k Ω
4.75k Ω
49.9Ω
MAX14757
(SW0)
30V