The AD5378 contains 32 14-bit DACs in one CSPBGA package.The AD5378 provides a bipolar output range determined by the voltages applied to the VREF(+) and VREF(?) inputs. The maximum output voltage span is 17.5 V, corresponding to a bipolar output range of ?8.75 V to +8.75 V, and is achieved with reference voltages of VREF(?) = ?3.5 V and VREF(+) = +5 V.

The AD5378 guarantees operation over a wide VSS/VDD supply range from ±11.4 V to ±16.5 V. The output amplifier headroom requirement is 2.5 V operating with a load current of 1.5 mA, and 2 V operating with a load current of 0.5 mA.

The AD5378 contains a double-buffered parallel interface inwhich 14 data bits are loaded into one of the input registers under the control of the WR, CS, and DAC channel address pins, A0 to A7. It also has a 3-wire serial interface, which is compatible with SPI, QSPI?, MICROWIRE?, and DSP interface standards and can handle clock speeds of up to 50 MHz.

The DAC outputs are updated when the DAC registers receive new data. All the outputs can be updated simultaneously by taking the LDAC input low. Each channel has a programmable gain and an offset adjust register.

Each DAC output is gained and buffered on-chip with respect to an external REFGND input. The DAC outputs can also be switched to REFGND via the CLR pin. Table 1 and Table 2 show the product portfolio for high channel count bipolar andunipolar voltage output DACs.

Applications

• ADM696 - 微处理器电源监控器，内置备用电池切换、可调低压线路电压监控器、可调看门狗定时器、低压线路、电源故障功能及看门狗状态输出、100MA输出电流特性
• ADUM5210 - 集成DC/DC转换器的双通道隔离器（2/0通道方向）
• ADUC831 - 精密模拟微控制器：1.3MIPS 8052 MCU + 62kB闪存 + 8通道12位ADC + 双通道12位DAC
• HMC438 - 使用InGaP HBT技术，5分频，采用SMT封装，DC - 7 GHz
• ADN4693E - 具有1类接收器的3.3 V、200 MBPS、全双工、高速M-LVDS收发器
• ADL5391 - DC至2.0 GHz乘法器
• ADM1816 - 提供低电平有效开漏输出选择的微处理器监控电路，采用SOT-23封装
• ADSP-BF523 - 具有先进外设功能的低功耗Blackfin处理器
• AD8283 - 雷达接收路径AFE：6通道、LNA/PGA/AAF、集成ADC
• AD8436 - 低成本、低功耗真RMS-to-DC转换器