SpecificationsSupply voltage range, AVDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to 6.5 V
DVDD (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...................................... . . 0.3 V to 6.5 V
Voltage between AGND and DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 0.3 V to 0.5 V
Supply voltage range, AVDD to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 6.5 V to 6.5 V
CLK, SLEEP, MODE (see Note 2) . . . . . . . . . . . . . . . . . . . . . ............................................... 0.3 V to DVDD + 0.3 V
Digital input D11D0 (see Note 2) . . . . . . . . . . . . . . . . . . . . ............................................. 0.3 V to DVDD + 0.3 V
IOUT1, IOUT2 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................................... 1 V to AVDD + 0.3 V
COMP1, COMP2 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . .............................................. 0.3 V to AVDD + 0.3 V
EXTIO, BIASJ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................. 0.3 V to AVDD + 0.3 V
EXTLO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........................................ . . . . 0.3 V to 0.3 V
Peak input current (any input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Peak total input current (all inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
Operating free-air temperature range, TA: THS5661I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . 40°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from the case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . ....... . . . 260°CDescriptionThe THS5661 is a 12-bit resolution digital-to-analog converter (DAC) specifically optimized for digital data transmission in wired and wireless communication systems. The 12-bit DAC is a member of the CommsDAC series of high-speed, low-power CMOS digital-to-analog converters. The CommsDAC family consists of pin compatible 14-, 12-, 10-, and 8-bit DACs. All devices offer identical interface options, small outline package, and pinout. The THS5661 offers superior ac and dc performance while supporting update rates up to 100 MSPS. The THS5661 operates from an analog supply of 4.5 V to 5.5 V. Its inherent low power dissipation of 175 mW ensures that the device is well-suited for portable and low-power applications. Lowering the full-scale current output reduces the power dissipation without significantly degrading performance. The device features a SLEEP mode, which reduces the standby power to approximately 25 mW, thereby optimizing the power consumption for system needs.
The THS5661 is manufactured in Texas Instruments advanced high-speed mixed-signal CMOS process. A current-source-array architecture combined with simultaneous switching shows excellent dynamic performance. On-chip edge-triggered input latches and a 1.2 V temperature-compensated bandgap reference provide a complete monolithic DAC solution. The digital supply range of 3 V to 5.5 V supports 3 V and 5 V CMOS logic families. Minimum data input setup and hold times allow for easy interfacing with external logic. The THS5661 supports both a straight binary and twos complement input word format, enabling flexible interfacingwith digital signal processors.
The THS5661 provides a nominal full-scale differential output current of 20 mA and >300 kW output impedance, supporting both single-ended and differential applications. The output current of THS5661 can be directly fed to the load (e.g., external resistor load or transformer), with no additional external output buffer required. An accurate on-chip reference and control amplifier THS5661 allows the user to adjust this output current from 20 mA down to 2 mA, with no significant degradation of performance. This reduces power consumption and provides 20 dB gain range
control capabilities. Alternatively, an external reference voltage and control amplifier may be applied in applications using a multiplying DAC. The output voltage compliance range is 1.25 V.
THS5661 Data Sheet
