LSB DNL Integrated Circuit Chip MCP4922-E-SL 12 Bit DAC SPI⑩ Interface

Block Diagram

  Features

• 12-Bit Resolution

• ±0.2 LSB DNL (typ)

• ±2 LSB INL (typ)

• Single or Dual Channel

• Rail-to-Rail Output

• SPI™ Interface with 20 MHz Clock Support

• Simultaneous Latching of the Dual DACs w/LDAC

• Fast Settling Time of 4.5 µs

• Selectable Unity or 2x Gain Output

• 450 kHz Multiplier Mode

• External VREF Input

• 2.7V to 5.5V Single-Supply Operation

• Extended Temperature Range: -40°C to +125°C

Applications

• Set Point or Offset Trimming

• Sensor Calibration • Digitally-Controlled Multiplier/Divider

• Portable Instrumentation (Battery-Powered)

• Motor Feedback Loop Control

Description

  The Microchip Technology Inc. MCP492X are 2.7 – 5.5V, low-power, low DNL, 12-Bit Digital-to-Analog Converters (DACs) with optional 2x buffered output and SPI interface.

  The MCP492X are DACs that 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 MCP492X are available in the extended temperature range and PDIP, SOIC, MSOP and TSSOP packages. The MCP492X 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 MCP492X include doublebuffered inputs, allowing simultaneous updates using the LDAC pin. These devices also incorporate a Power-On Reset (POR) circuit to ensure reliable power-up.

1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings †

VDD................................................................................. 6.5V

All inputs and outputs w.r.t ............. AVSS –0.3V to VDD+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 (TJ)..........................+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.

    FIGURE 2-11: MCP4921 IDD vs. Ambient                          FIGURE 2-14: MCP4922 IDD vs. Ambient              Temperature and VDD.                                                             Temperature and VDD.

FIGURE 2-12: MCP4921 IDD Histogram (VDD = 2.7V).                     FIGURE 2-15: MCP4922 IDD Histogram (VDD = 2.7V).

FIGURE 2-13: MCP4921 IDD Histogram (VDD = 5.0V).          FIGURE 2-16: MCP4922 IDD Histogram (VDD = 5.0V