SGM5348-12.pdf
No.11237
● Low Power Consumption (0.5mW/CH)
● Integrating 8 Channels of 12-Bit DAC
● Built-in Rail-to-Rail Output Amplifier: Sink/Source Current with
Short Current Control
● Daisy-Chain Capability
● Simultaneous 8 Channels Output Updating
● Individual Channel Power-Down Capability
0.6μA (TYP) ICC for Power-Down Mode
● 0.1% (TYP) Gain Error for All Channels
● Interface Sees No Quiescent Current when VBUS < VCC
● Power-On Reset: Output Reset to GND
● Serial Data Input: Up to 40MHz Operation
● TTL Compatible Input Logic Level
● Wide Power Supply Range: 2.8V to 5.5V
● Dual Reference Voltages with Range of 0.5V to VCC
● -40℃ to +125℃ Operating Temperature Range
● Available in Green TSSOP-16 and TQFN-3×3-16L Packages
The SGM5348-12 features 8 channels of digital-to- analog converter (DAC) with output amplifiers. The output amplifier provides high current drive capability. The digital data is sent via SPI interface, and cascaded connections can be used. The SGM5348-12 also offers daisy-chain operation, where an unlimited number of SGM5348-12s can be updated simultaneously using a single serial interface.
There are two references for the SGM5348-12. One reference input serves channels 1 through 4, while the other reference serves channels 5 through 8. Each reference can be set independently between 0.5V and VCC, providing the widest possible output dynamic range. The SGM5348-12 has a 16-bit input shift register that controls the mode of operation, the power-down condition and the register/output value of the DAC channels. All 8 channels DAC outputs can be updated simultaneously or individually.
A power-on reset circuit ensures that the DAC outputs are set to 0V during power-up and remain 0V until there is a valid data written into the device. The power-down feature of the SGM5348-12 allows each DAC to be independently powered with three different termination options. With all the DAC channels powered down, power consumption reduces to less than 1.5μW at 3V and less than 3μW at 5V. The low power consumption and small packages of the SGM5348-12 make it an excellent choice for use in battery powered equipment.
