Integrated 2x output amplifier circuit, 12Bit four-channel digital-to-analog converter with power-down mode

18025319604

Integrated 2x output amplifier circuit, 12Bit four-channel digital-to-analog converter with power-down mode [Copy link]

Product Specification: MS5614_T 农生18025319604.pdf (1.16 MB, downloads: 12)

2022-6-27 18:26 上传

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Product Description
MS5614/5614T is a 12-bit four-channel output voltage DAC. The interface adopts a four-wire serial port mode and is compatible with TMS320, SPI, QSPI and Microwire serial ports. MS5614/5614T control data has 16 bits, including DAC address, control byte, and 12-bit DAC data. The power supply range is 2.7V to 5.5V. The resistor string output is connected to a class AB output rail-to-rail buffer with a gain of 6dB. The output buffer improves stability and reduces settling time. MS5614/5614T has a power-down mode to optimize power consumption during operation. MS5614 is a SOP16 package, and MS5614T is a TSSOP16 package.
Main features
12bit accuracy
Programmable setup time 3us or 9us
Compatible with TMS320, SPI, QSPI, Microwire interface
Internal power-on reset
Low power consumption, 8mW at 5V, 3.6mW at 3V
Integrated REF buffer
Output range is 2 times the reference voltage
Software, hardware Power down
Power supply voltage: 2.7V5.5V
Applications
Digital servo system control
Digital compensation and gain adjustment
Industrial process control
Mechanical and mobile control equipment
Mass storage devices

The internal block diagram is as follows:

Functional Description

1. Overall function

The MS5614/5614T is a 12-bit single-supply digital-to-analog converter. Its architecture adopts a resistor array structure and integrates a serial interface, rate and shutdown logic control, reference input buffer, resistor string and output rail-to-rail amplifier.

2. Power supply bypass and ground management

In order to improve system performance, the analog ground and digital ground should be connected to different ground connection layers during PCB design, and the two ground planes should be connected together at the low impedance node of the system. It is best to connect the DAC's AGND to the system's analog ground to ensure that the analog ground current can be well managed and the voltage drop of the analog ground connection line can be ignored. A
0.1uF ceramic decoupling capacitor should be connected between the chip power supply and the ground, and installed as close to the chip as possible. Using a magnetic ring can further separate the system's analog power supply and digital power supply.