MCP4821-E/P Microchip Technology, MCP4821-E/P Datasheet - Page 15

• Manufacturer Part Number: MCP4821-E/P
• Description: IC DAC 12BIT W/SPI 8DIP
• Manufacturer: Microchip Technology

Specifications of MCP4821-E/P

• Number Of Converters: 1
• Package / Case: 8-DIP (0.300", 7.62mm)
• Settling Time: 4.5µs
• Number Of Bits: 12
• Data Interface: Serial, SPI™
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Resolution: 12 bit
• Interface Type: Serial (3-Wire, SPI, Microwire)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

3.0
The descriptions of the pins are listed in
TABLE 3-1:
3.1
V
supply voltage is relative to V
2.7V to 5.5V. The power supply at the V
be as clean as possible for good DAC performance.
Using an appropriate bypass capacitor of about 0.1 µF
(ceramic) to ground is recommended. An additional
10 µF capacitor (tantalum) in parallel is also recom-
mended to further attenuate high-frequency noise
present in application boards.
V
path of the device. The user must connect the V
to
connection. If an analog ground path is available in the
application Printed Circuit Board (PCB), it is highly
recommended that the V
ground path or isolated within an analog ground plane
of the circuit board.
3.2
CS is the Chip Select input pin, which requires an
active low to enable serial clock and data functions.
3.3
SCK is the SPI compatible serial clock input pin.
 2010 Microchip Technology Inc.
MSOP, PDIP,
DD
SS
SOIC, DFN
MCP4801/4811/4821
a
is the positive supply voltage input pin. The input
is the analog ground pin and the current return
—
1
2
3
4
5
6
7
8
ground
PIN DESCRIPTIONS
Supply Voltage Pins (V
Chip Select (CS)
Serial Clock Input (SCK)
plane
PIN FUNCTION TABLE FOR MCP4801/4811/4821
DFN
1
2
3
4
5
6
7
8
9
through
SS
pin be tied to the analog
SS
Symbol
SHDN
LDAC
and can range from
V
SCK
V
SDI
V
CS
EP
a
OUT
DD
SS
DD,
low-impedance
Table
DD
V
pin should
Supply Voltage Input (2.7V to 5.5V)
Chip Select Input
Serial Clock Input
Serial Data Input
DAC Output Synchronization Input. This pin is used to transfer the input
register (DAC settings) to the output register (V
Hardware Shutdown Input
Ground reference point for all circuitry on the device
DAC Analog Output
Exposed thermal pad. This pad must be connected to V
SS
3-1.
)
SS
pin
3.4
SDI is the SPI compatible serial data input pin.
3.5
LDAC (latch DAC synchronization input) pin is used to
transfer the input latch register to the DAC register (out-
put latches, V
updated with input register content. This pin can be tied
to low (V
edge of the CS pin. This pin can be driven by an exter-
nal control device such as an MCU I/O pin.
3.6
V
has an output amplifier. The full-scale range of the DAC
output is from V
selection option (1x or 2x). The DAC analog output
cannot go higher than the supply voltage (V
3.7
There is an internal electrical connection between the
exposed thermal pad (EP) and the V
be connected to the same potential on the PCB.
OUT
MCP4801/4811/4821
is the DAC analog output pin. The DAC output
SS
Serial Data Input (SDI)
Latch DAC Input (LDAC)
Analog Output (V
Exposed Thermal Pad (EP)
Description
) if the V
OUT
SS
). When this pin is low, V
OUT
to G*V
update is desired at the rising
REF
OUT
, where G is the gain
OUT
)
)
SS
DS22244B-page 15
SS
pin. They must
in application
DD
).
OUT
is