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Part No.	MAX5141
Manufacturer	MAXIM
Size	410 Kbytes
Pages	12 pages
Description	+3V/+5V, Serial-Input, Voltage-Output, 14-Bit DACs

Datasheet Summary with AI

1. General Description & Functionality

️· What they are: Voltage-output, 14-bit digital-to-analog converters (DACs).
️· Key Features:
- Full 14-bit performance (less than 1 LSB integral and differential linearity error).
- Serial data interface (minimizes pin count).
- Compatible with SPI/QSPI/MICROWIRE interfaces.
- Asynchronous clear function.
- Power-on reset function ensures predictable initial state.
️· Models: MAX5141, MAX5142, MAX5143, MAX5144. The key differences are in the clear functionality (code 0 vs. code 8192) and the options for bipolar output.

2. Digital Interface

️· Serial Communication: Uses a 3-wire interface (CS, SCLK, DIN).
️· Chip Select (CS): Frames the serial data. Data is latched on the rising edge of SCLK after CS goes low.
️· Serial Clock (SCLK): Synchronizes data input. Duty cycle must be between 50%.
️· Data Input (DIN): Receives serial data. Requires 16 bits (14 data bits + 2 zero sub-bits).
️· Data Transfer: 16 bits of data must be transferred after the CS goes low.

3. Clearing the DAC

️· CLR Input: A logic-low pulse on the CLR input clears the DAC.
- MAX5141/MAX5143: Clears to code 0.
- MAX5142/MAX5144: Clears to code 8192.

4. Reference & Power

️· Reference Voltage: Operates with external voltage references from +2V to VDD (supply voltage).
️· Supply Voltage:
- MAX5143/MAX5144: +3V
- MAX5141/MAX5142: +5V
️· Reference Considerations: Reference voltage should ideally have a temperature coefficient of < 0.5 ppm/°C. Low impedance reference is critical for performance.

5. Applications and Considerations

️· Bipolar Operation: The MAX5142 and MAX5144 have matched bipolar offset resistors for use with external op-amps.
️· Reference Impedance: The input resistance seen by the reference voltage is code-dependent and varies. Maintaining a low-impedance reference is important to prevent errors.
️· Bypassing: Ceramic capacitors are recommended for high frequency bypassing of the reference voltage, and a low-ESR capacitor for low-frequency bypassing.

6. Pin Descriptions (Key Ones)

️· REF: Voltage Reference Input
️· CS: Chip Select Input
️· SCLK: Serial Clock Input
️· DIN: Serial Data Input
️· CLR: Clear Input
️· OUT: DAC Output Voltage
️· INV/RFB: Connections used for external op amp in bipolar output configuration.
️· VDD/GND: Supply voltage and ground.