MCP4821

Features:

`12-Bit Resolution
`±0.2LSb DNL (typ.)
`±2LSb INL (typ.)
`Single or Dual Channel
`Rail-to-Rail Output
`SPI^TM Interface with 20MHz Clock Support
`Simultaneous Latching of the Dual DACs withLDAC pin
`Fast Settling Time of 4.5s
`Selectable Unity or 2x Gain Output
`2.048V Internal Band Gap Voltage Reference
`50ppm/ V<sub>REF</sub> Temperature Coefficient
`2.7V to 5.5V Single-Supply Operation
`Extended Temperature Range:-40 to +125

Application

·Set Point or Offset Trimming
·Sensor Calibration
·Precision Selectable Voltage Reference
·Portable Instrumentation (Battery-Powered)
·Calibration of Optical Communication Devices




Pinout






Specifications

Parameter Name	Value
Typical Standby Current (A)	0.3
Typical Operating Current (A)	330
Resolution (Bits)	12
DACs per Package	1
Vref	Int
Output Settling Time (s)	4.5
DNL (LSB)	0.75
Temp. Range (°C)	-40 to 125
Interface	SPI

Absolute Maximum Ratings †
V_DD................................................................................... 6.5V
All inputs and outputs w.r.t ............. AV_SS 0.3V to V_DD+0.3V
Current at Input Pins ...................................................±2 mA
Current at Supply Pins ...............................................±50 mA
Current at Output Pins ...............................................±25 mA
Storage temperature ..................................-65°C to +150°C
Ambient temp. with power applied .............-55°C to +125°C
ESD protection on all pins ........... 4 kV (HBM), 400V (MM)
Maximum Junction Temperature (T_J) ..........................+150°C

† Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Description

The MCP4821 series of DACs offers 12-bit resolution coupled with low power consumption and small packages. Communication with the device is accomplished via a simple serial interface using the SPI protocols. These DACs come with excellent differential non-linearity of less than ±3/4 LSB, making them well suited for set point control, offset adjustment and calibration applications. The low power consumption and small packages make these devices attractive for many portable and battery-powered applications. Both single and dual channel devices are available.

The Microchip Technology Inc. MCP4821 devices are 2.7V - 5.5V, low-power, low DNL, 12-bit Digital-to-Analo Converters (DACs) with internal band gap voltage reference, optional 2x-buffered output and Serial Peripheral Interface (SPI^TM).

The MCP4821 family of DACs provide high accuracy and low noise performance for industrial applications where calibration or compensation of signals (such as temperature, pressure and humidity) are required. The MCP482X devices are available in the extended temperature range and PDIP, SOIC and MSOP packages.

The MCP4821 devices utilize a resistive string architecture, with its inherent advantages of low DNL error, low ratio metric temperature coefficient and fast settling time. These devices are specified over the extended temperature range. The MCP482X family includes double-buffered registers, allowing simulta- pin. These devices also neous updates using the LDAC incorporate a Power-On Reset (POR) circuit to ensure reliable power-up.