MCP6S22T-I/SL(2012) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
MCP6S22T-I/SL Datasheet PDF : 42 Pages
| |||
MCP6S21/2/6/8
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
MCP6S21 MCP6S22 MCP6S26 MCP6S28
1
1
1
1
2
2
2
2
—
3
3
3
—
—
4
4
—
—
5
5
—
—
6
6
—
—
7
7
—
—
—
8
—
—
—
9
3
—
8
10
4
4
9
11
5
5
10
12
6
6
11
13
—
—
12
14
7
7
13
15
8
8
14
16
3.1 Analog Output
The output pin (VOUT) is a low-impedance voltage
source. The selected gain (G), selected input (CH0-
CH7) and voltage at VREF determine its value.
3.2 Analog Inputs (CH0 thru CH7)
The inputs CH0 through CH7 connect to the signal
sources. They are high-impedance CMOS inputs with
low bias currents. The internal MUX selects which one
is amplified to the output.
3.3 External Reference Voltage (VREF)
The VREF pin should be at a voltage between VSS and
VDD (the MCP6S22 has VREF tied internally to VSS).
The voltage at this pin shifts the output voltage.
Symbol
VOUT
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
VREF
VSS
CS
SI
SO
SCK
VDD
Description
Analog Output
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
External Reference Pin
Negative Power Supply
SPI Chip Select
SPI Serial Data Input
SPI Serial Data Output
SPI Clock Input
Positive Power Supply
3.4 Power Supply (VSS and VDD)
The positive power supply pin (VDD) is 2.5V to 5.5V
higher than the negative power supply pin (VSS). For
normal operation, the other pins are between VSS and
VDD.
Typically, these parts are used in a single (positive)
supply configuration. In this case, VSS is connected to
ground and VDD is connected to the supply. VDD will
need a local bypass capacitor (0.1 µF) at the VDD pin.
It can share a bulk capacitor with nearby analog parts
(typically 2.2 µF to 10 µF within 4 inches (100 mm) of
the VDD pin.
3.5 Digital Inputs
The SPI interface inputs are: Chip Select (CS), Serial
Input (SI) and Serial Clock (SCK). These are Schmitt-
triggered, CMOS logic inputs.
3.6 Digital Output
The MCP6S26 and MCP6S28 devices have a SPI
interface serial output (SO) pin. This is a CMOS push-
pull output and does not ever go High-Z. Once the
device is deselected (CS goes high), SO is forced low.
This feature supports daisy chaining, as explained in
Section 5.3, “Daisy Chain Configuration”.
2003-2012 Microchip Technology Inc.
DS21117B-page 15
Share Link: 