MCP4921-E/SN Microchip Technology, MCP4921-E/SN Datasheet - Page 17

• Manufacturer Part Number: MCP4921-E/SN
• Description: IC DAC 12BIT SNGL W/SPI 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP4921-E/SN

• Number Of Converters: 1
• Package / Case: 8-SOIC (3.9mm Width)
• 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: Surface Mount
• 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: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Package: 8SOIC N
• Architecture: Resistor-String
• Digital Interface Type: Serial (3-Wire, SPI, Microwire)
• Number Of Outputs Per Chip: 1
• Output Type: Voltage
• Full Scale Error: 1 %FSR
• Integral Nonlinearity Error: ±12 LSB
• Maximum Settling Time: 4.5(Typ) us
• 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. It
is recommended to use an appropriate bypass capaci-
tor of about 0.1 µF (ceramic) to ground. An additional
10 µF capacitor (tantalum) in parallel is also recom-
mended 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, which requires an active-low
signal to enable serial clock and data functions.
3.3
SCK is the SPI compatible serial clock input.
3.4
SDI is the SPI compatible serial data input.
 2010 Microchip Technology Inc.
DD
SS
PDIP, MSOP, 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)
Serial Data Input (SDI)
SS
—
1
2
3
4
5
6
7
8
pin be tied to the analog ground path or
PIN FUNCTION TABLE
DFN
1
2
3
4
5
6
7
8
9
SS
and can range from
DD,
Table
DD
Symbol
LDAC
V
V
SCK
V
V
SDI
V
CS
EP
OUT
SS
REF
pin should
DD
SS
SS
3-1.
pin to a
)
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
Voltage Reference Input
Ground reference point for all circuitry on the device
DAC Analog Output
Exposed Thermal Pad. This pad must be connected to V
application
3.5
The LDAC (latch DAC synchronization input) pin is
used to transfer the input latch register to the DAC reg-
ister (output latches, V
is updated with input register content. 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
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
V
reference on this pin is utilized to set the reference
voltage on the string DAC. The input voltage can range
from V
3.8
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
REF
MCP4901/4911/4921
is the voltage reference input for the device. The
SS
is the DAC analog output pin. The DAC output
Latch DAC Input (LDAC)
Analog Output (V
Voltage Reference Input (V
Exposed Thermal Pad (EP)
to V
SS
DD
Description
) if the V
. This pin can be tied to V
SS
to G*V
OUT
OUT
). When this pin is low, V
REF
update is desired at the
, where G is the gain
OUT
)
DS22248A-page 17
SS
pin. They must
DD
DD
REF
.
).
OUT
SS
)
in
)
OUT