MCP4812-E/MS Microchip Technology, MCP4812-E/MS Datasheet - Page 15

• Manufacturer Part Number: MCP4812-E/MS
• Description: DAC 10BIT DUAL SPI/VREF 8MSOP
• Manufacturer: Microchip Technology

Specifications of MCP4812-E/MS

• Number Of Converters: 2
• Settling Time: 4.5µs
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Number Of Bits: 10
• Data Interface: Serial, SPI™
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Dac Outputs: 2
• Resolution: 10 bit
• Interface Type: SPI
• Supply Voltage (max): 6.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 55 C
• Supply Current: 415 uA
• 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 a good DAC performance.
It is recommended to use an appropriate bypass
capacitor of about 0.1 µF (ceramic) to ground. An
additional 10 µF capacitor (tantalum) in parallel is also
recommended to further attenuate high-frequency
noise present in application boards.
V
of the device. The user must connect the V
ground plane through a low-impedance connection. If
an analog ground path is available in the application
Printed Circuit Board (PCB), it is highly recommended
that the V
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.
DD
SS
MCP4802/4812/4822
MSOP, PDIP, SOIC
is the analog ground pin and the current return path
is the positive supply voltage input pin. The input
PIN DESCRIPTIONS
Supply Voltage Pins (V
Chip Select (CS)
Serial Clock Input (SCK)
SS
1
2
3
4
5
6
7
8
pin be tied to the analog ground path or
PIN FUNCTION TABLE FOR MCP4802/4812/4822
SS
Symbol
V
V
LDAC
SCK
V
V
SDI
OUTB
OUTA
CS
and can range from
DD
SS
DD,
Table
DD
V
SS
pin should
Supply Voltage Input (2.7V to 5.5V)
Chip Select Input
Serial Clock Input
Serial Data Input
Synchronization Input. This pin is used to transfer DAC settings
(Input Registers) to the output registers (V
DAC
Ground reference point for all circuitry on the device
DAC
SS
3-1.
pin to a
)
B
A
Output
Output
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 registers to their corresponding
DAC registers (output latches, V
low, both V
time with their input register contents. This pin can be
tied to low (V
rising edge of the CS pin. This pin can be driven by an
external control device such as an MCU I/O pin.
3.6
V
B output pin. Each output has its own output amplifier.
The full-scale range of the DAC output is from
V
(1x or 2x). The DAC analog output cannot go higher
than the supply voltage (V
OUTA
SS
MCP4802/4812/4822
to G* V
is the DAC A output pin, and V
Serial Data Input (SDI)
Latch DAC Input (LDAC)
Analog Outputs (V
Description
OUTA
REF
SS
, where G is the gain selection option
) if the V
and V
OUTB
OUT
OUT
DD
)
).
are updated at the same
update is desired at the
OUT
OUTA
). When this pin is
DS22249A-page 15
OUTB
, V
OUTB
is the DAC
)