TC132110-Bit Digital-to-Analog Converter with Two-Wire InterfaceFeaturesGeneral Description • 10-Bit Digital-to-Analog Converter The TC1321 is a serially accessible, 10-bit voltage • 2.7-5.5V Single Supply Operation output, digital-to-analog converter (DAC). The DAC • Simple SMBus/I2CTM Serial Interface produces an output voltage that ranges from ground to an externally supplied reference voltage. It operates • Low Power Operation from a single power supply that can range from 2.7V to - Normal Mode: 350 µA 5.5V, making it ideal for a wide range of applications. - Shutdown Mode: 0.5 µA Built into the part is a Power-on Reset (POR) function • Temperature Range: 40°C to +85°C that ensures that the device starts at a known condition. • 8-Pin SOIC and 8-Pin MSOP Packages Communication with the TC1321 is accomplished via a simple 2-wire SMBus/I2C compatible serial port, with Applications the TC1321 acting as a slave only device. The host can enable the SHDN bit in the CONFIG register to activate • Programmable Voltage Sources the Low Power Standby mode. • Digital Controlled Amplifiers/Attenuators • Process Monitoring and Control Package Type 8-Pin MSOP and 8-Pin SOIC (Narrow) VREF 1 8 VDD SDA 2 7 DAC-OUT TC1321 SCL 3 6 NC VSS 4 5 VOUT Typical Application VIN VDD 8 TC1321 – V V V REF OUT ADJUST V 1 DAC 5 + REF Serial Port SCL SDA 3 2 Microcontroller 2010 Microchip Technology Inc. DS21387C-page 1 Document Outline TC1321 10-Bit Digital-to-Analog Converter with Two-Wire Interface 1.0 Electrical Characteristics 2.0 Pin Descriptions TABLE 2-1: Pin Function Table 2.1 External Voltage Reference Input (VREF) 2.2 Bi-Directional Serial Data Input and Output (SDA) 2.3 Serial Clock Input (SCL) 2.4 Supply Power Ground (VSS) 2.5 Output (VOUT) 2.6 No Connection (NC) 2.7 Output (DAC-OUT) 2.8 Positive Power Supply Input (VDD) 3.0 Detailed Description 3.1 Reference Input 3.2 Output Amplifier 3.3 Standby Mode TABLE 3-1: Standby Mode Operation 3.4 SMBus Slave Address FIGURE 3-1: SMBus/I2C Protocols. 4.0 Serial Port Operation TABLE 4-1: TC1321 Serial Bus Conventions 4.1 START Condition (START) 4.2 Address Byte 4.3 Acknowledge (ACK) 4.4 Data Byte 4.5 Stop Condition (STOP) FIGURE 4-1: SMBus/I2CTiming Diagrams. 4.6 Register Set and Programmer’s Model TABLE 4-2: TC1321 Command Set (READ_BYTE and WRITE_BYTE) TABLE 4-3: Configuration Register (CONFIG), 8-Bit, Read/Write TABLE 4-4: Data Register (DATA), 10-Bit, Read/Write 4.7 Register Set Summary TABLE 4-5: TC1321 Register Set Summary 5.0 Packaging Information 5.1 Package Marking Information Appendix A: Revision History Product Identification System Worldwide Sales and Service
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