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

• AD746 - 双通道、精密、500 ns建立时间、BiFET运算放大器
• ADSP-BF518F16 - 集成16 MB FLASH存储器并支持IEEE-1588的BLACKFIN嵌入式处理器
• AD9273 - 八通道LNA/VGA/AAF/ADC与交叉点开关
• ADCLK854 - 1.8 V、12 LVDS/24 CMOS输出的低功耗时钟扇出缓冲器
• HMC511 - 集成Fo/2的VCO SMT，9.05 - 10.15 GHz
• AD7224 - 内置输出放大器的LC2 MOS 8位DAC
• AD745 - 超低噪声、高速、BIFET运算放大器
• AD760 - 16/18位自校准串行/字节DACPORT
• HMC-C075 - 双级功率放大器模块，10 MHz至6 GHz
• ADL5373 - 2300 MHz 至3000 MHz 正交调制器