THS5661A
- Member of the Pin-Compatible CommsDAC™ Product Family
- 125 MSPS Update Rate
- 12-Bit Resolution
- Spurious Free Dynamic Range (SFDR) to Nyquist at 40 MHz Output: 60 dBc
- 1 ns Setup/Hold Time
- Differential Scalable Current Outputs: 2 mA to 20 mA
- On-Chip 1.2 V Reference
- 3 V and 5 V CMOS-Compatible Digital Interface
- Straight Binary or Twos Complement Input
- Power Dissipation: 175 mW at 5 V, Sleep Mode: 25 mW at 5 V
- Package: 28-Pin SOIC and TSSOP
CommsDAC is a trademark of Texas Instruments Incorporated.
The THS5661A 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 THS5661A offers superior ac and dc performance while supporting update rates up to 125 MSPS.
The THS5661A operates from an analog and digital supply of 3 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 THS5661A 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 THS5661A supports both a straight binary and twos complement input word format, enabling flexible interfacing with digital signal processors.
The THS5661A provides a nominal full-scale differential output current of 20 mA and < 300 k output impedance, supporting both single-ended and differential applications. The output current 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 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.
The THS5661A is available in both a 28-pin SOIC and TSSOP package. The device is characterized for operation over the industrial temperature range of 40°C to 85°C.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | 12-Bit, 125 MSPS, CommsDAC Digital-to-Analog Converter datasheet (Rev. B) | 2002年 9月 25日 | |
Application note | Wideband Complementary Current Output DAC Single-Ended Interface (Rev. A) | 2015年 5月 8日 | ||
EVM User's guide | THS56XEVM for the THS5641A/51A/61A/71A 8-, 10-, 12, and 14-bit CommsDAC | 2011年 1月 25日 | ||
Application note | Noise Analysis for High Speed Op Amps (Rev. A) | 2005年 1月 17日 | ||
Application note | Using TI FIFOs to Interface High-Speed Data Converters With TI TMS320 DSPs | 2001年 6月 8日 |
設計與開發
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THS5661EVM — THS5661A 12 位元 125-MSPS 數位轉類比轉換器評估模組
The THS56x1 evaluation module (EVM) allows the user to easily evaluate the THS56x1A CommsDAC family. The THS56x1A family features 125 MSPS update rate and is specifically optimized for use in high-speed digital communication applications. The CommsDAC family consists of the pin-compatible 8-bit (...)
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- Click on "abstract" to view abstract of document.
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High-speed digital-to-analog converters (DACs) most often use a (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
SOIC (DW) | 28 | Ultra Librarian |
TSSOP (PW) | 28 | Ultra Librarian |
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