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

• HMC462LP5 - 宽带低噪声放大器，采用SMT封装，2 - 20 GHz
• ADM691 - 微处理器电源监控器，内置备用电池切换、50 MS标称值可调复位周期、可调看门狗周期、芯片使能信号、看门狗、备用电池功能和4.65V阈值电压、低VCC状态输出、100MA输出电流特性
• AD8311 - 50 dB GSM PA控制器
• ADP1707 - 1 A、低压差、CMOS线性稳压器，具有跟踪特性
• ADP2389 - 集成可编程限流的18 V、12 A降压稳压器
• ADUM6010 - 3.75KV RMS隔离式DC/DC转换器
• AD8497 - 完整的K型25°至100°范围热电偶放大器，集成冷结补偿功能
• HMC-C088 - 连续检波对数视频放大器(SDLVA)，1 - 20 GHz
• HMC578-Die - x2 Active Multiplier Chip, 24 - 33 GHz Fout
• HMC907 - HMC907 / HMC907LP5E½ W功率放大器芯片或采用SMT封装，0.2 GHz至22 GHz