MCP6S92 Microchip Technology Inc., MCP6S92 Datasheet - Page 17

• Manufacturer Part Number: MCP6S92
• Description: Single-ended, Rail-to-rail I/o, Low-gain Pga
• Manufacturer: Microchip Technology Inc.

3.0
Descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
3.1
The output pin (V
source. The selected gain (G), selected input (CH0,
CH1) and voltage at V
3.2
The inputs CH0 and CH1 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
The V
voltage between V
V
shifts the output voltage.
 2004 Microchip Technology Inc.
REF
MCP6S91
—
—
REF
1
2
3
4
5
6
7
8
tied internally to V
PIN DESCRIPTIONS
Analog Output
Analog Inputs (CH0, CH1)
External Reference Voltage (V
pin, which is an analog input, should be at a
MCP6S92
PIN FUNCTION TABLE
—
—
OUT
1
2
3
4
5
6
7
8
SS
REF
) is a low-impedance voltage
and V
SS
determine its value.
). The voltage at this pin
MCP6S93
DD
10
1
2
3
4
5
6
7
8
9
(the MCP6S92 has
Symbol
V
V
CH0
CH1
SCK
V
V
SO
CS
OUT
REF
SI
DD
SS
REF
)
Analog Output
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
The Positive Power Supply Pin (V
higher than the Negative Power Supply Pin (V
normal operation, the other pins are at voltages
between V
Typically, these parts are used in a single (positive)
supply configuration. In this case, V
ground and V
need a local bypass capacitor (typically 0.01 µF to
0.1 µF) within 2 mm of the V
share a bulk capacitor with analog parts (typically
2.2 µF to 10 µF) within 100 mm of the V
3.5
The SPI interface inputs are: Chip Select (CS), Serial
Input (SI) and Serial Clock (SCK). These are Schmitt-
triggered, CMOS logic inputs.
3.6
The MCP6S93 device has 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”.
Power Supply (V
Digital Inputs
Digital Output
SS
and V
DD
Description
is connected to the supply. V
DD
MCP6S91/2/3
.
DD
SS
pin. These parts can
and V
DD
SS
DS21908A-page 17
) is 2.5V to 5.5V
is connected to
DD
DD
pin.
)
SS
DD
). For
will