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MCP4921-E/SN

12-bit single-channel voltage DAC, SPI, rail-to-rail output, 2.7-5.5V, SOIC-8, AEC-Q100

2849

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Pieza del fabricante：

MCP4921-E/SN

Paquete：

SOIC-8 (4,9 x 3,9 mm)

Descripción

Productos

The MCP4921-E/SN from Microchip Technology is a 12-Bit Single Output Voltage DAC with SPI interface in an 8-pin SOIC package. It features rail-to-rail output, external voltage reference, and selectable unity or 2x gain output, operating from 2.7V to 5.5V with very low power consumption.

Especificaciones

Resolution	12 Bit
Canales	1
Output Type	Voltage, Rail-to-Rail
Settling Time	4.5 μs
INL	±2 LSB typ
DNL	±0.75 LSB max
Tensión de alimentación	2.7 V to 5.5 V
Operating Current	175 μA typ
Interface	SPI (20 MHz)
Paquete	SOIC-8
Temperature Range	-40°C to +125°C

Características

12-bit resolution with ±0.2 LSB DNL (typical)
Rail-to-rail output with selectable unity or 2x gain
SPI interface supporting 20 MHz clock
External voltage reference input with multiplier mode
Double-buffered input registers with LDAC for synchronous update
Very low power consumption: 175 μA typical
AEC-Q100 Grade 1 qualified for automotive

Aplicaciones

Set point or offset trimming
Sensor calibration and compensation
Motor control feedback loops
Portable battery-powered instruments
Digitally-controlled multiplier/divider

Introducción del producto:MCP4921-E/SN Presentación del producto

The MCP4921-E/SN is a single channel 12-bit buffered voltage output Digital-to-Analog Converter (DAC) from Microchip Technology. It uses an external voltage reference pin and SPI interface. The device provides high accuracy and low noise performance suitable for consumer and industrial applications. The resistive string architecture ensures low DNL error and fast settling time. Double-buffered input registers allow synchronous updates using the LDAC pin. The device is AEC-Q100 Grade 1 qualified, making it suitable for automotive applications.

Principio de funcionamiento:MCP4921-E/SN Principio de funcionamiento

The MCP4921-E/SN uses a resistive string DAC architecture where the 12-bit digital input code selects a tap point on a resistor divider chain between VREF and ground. The selected voltage is buffered by a rail-to-rail output amplifier with selectable gain of 1x or 2x. Data is written via SPI interface with a 16-bit command word containing configuration bits (gain selection, shutdown control) and the 12-bit DAC code. The LDAC pin allows double-buffered operation for synchronous output updates. An on-chip Power-On Reset (POR) circuit ensures the DAC output starts at a known state.

Descripción de la clavija:MCP4921-E/SN Definición y funciones de las clavijas

Pin	Nombre	Tipo	Función
1	VDD	Potencia	Positive supply voltage (2.7V to 5.5V)
2	CS	Entrada	Chip select (active low)
3	SCK	Entrada	SPI serial clock input
4	SDI	Entrada	SPI serial data input
5	LDAC	Entrada	Latch DAC input (active low, synchronous update)
6	VREF	Entrada	External voltage reference input
7	VSS	Suelo	Suelo
8	VOUT	Salida	DAC analog voltage output

Application Scenarios:In which products and applications isMCP4921-E/SN usado

Sensor calibration and signal compensation
Set point or offset trimming in control loops
Motor control feedback and voltage adjustment
Portable and battery-powered instrumentation
Optical communication device calibration

Alternative Models:What chips are recommended as replacements for MCP4921-E/SN

Fabricante	Número de pieza	Paquete	Notas
Microchip	MCP4922-E/SN	SOIC-14	Dual channel 12-bit DAC
Microchip	MCP4911-E/SN	SOIC-8	10-bit version, same footprint
Microchip	MCP4821-E/SN	SOIC-8	12-bit with internal 2.048V reference
Texas Instruments	DAC8562	VSSOP-10	12-bit dual DAC with internal ref