Overview
The DAC5688IRGCT is a high-performance, dual-channel 16-bit digital-to-analog converter (DAC) produced by Texas Instruments. This device is designed for high-speed applications, offering a maximum output update rate of 800 MSPS. It features dual CMOS input data buses, each capable of transferring data at 250 MSPS, and includes integrated 2x-8x interpolation filters, a fine frequency mixer with a 32-bit numerically controlled oscillator (NCO), and digital quadrature modulator correction. The DAC5688IRGCT is optimized for use in various wireless communication systems, providing superior linearity, noise, and crosstalk performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 | Bits |
| Maximum Output Update Rate | 800 | MSPS |
| Integral Nonlinearity (INL) | ±4 | LSB |
| Differential Nonlinearity (DNL) | ±2 | LSB |
| Output Settling Time | 10.4 | ns |
| Output Propagation Delay | 2 | ns |
| Output Rise/Fall Time (10% to 90%) | 220 | ps |
| Full Scale Output Current | 2 to 20 | mA |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | 64-pin 9x9mm QFN |
Key Features
- Dual, 16-bit, 800 MSPS DACs with dual CMOS input data buses
- Integrated 2x-8x interpolation filters with over 80 dB stop-band attenuation
- Complex mixer with 32-bit NCO for frequency upconversion
- Digital quadrature modulator correction for IQ compensation
- Digital inverse SINC filter to compensate for DAC sin(x)/x frequency roll-off
- Flexible input data bus options: dual-bus data, single-bus interleaved data, and input FIFO
- 2x-32x clock multiplying PLL/VCO
- On-chip 1.2-V reference and differential scalable output: 2 to 20 mA
- 3- or 4-wire serial control interface
Applications
- Cellular Base Stations
- Broadband Wireless Access (BWA)
- WiMAX 802.16
- Fixed Wireless Backhaul
- Cable Modem Termination System (CMTS)
Q & A
- What is the maximum output update rate of the DAC5688IRGCT?
The maximum output update rate is 800 MSPS.
- What are the key features of the DAC5688IRGCT's input data bus?
The device features dual CMOS input data buses with flexible options including dual-bus data, single-bus interleaved data, and an input FIFO.
- What is the purpose of the integrated interpolation filters?
The integrated 2x-8x interpolation filters provide over 80 dB of stop-band attenuation.
- How does the DAC5688IRGCT handle IQ compensation?
The device includes digital quadrature modulator correction (QMC) for IQ compensation of phase, gain, and offset.
- What is the operating temperature range of the DAC5688IRGCT?
The operating temperature range is -40°C to 85°C.
- What package type is the DAC5688IRGCT available in?
The device is available in a 64-pin 9x9mm QFN package.
- What are some of the key applications of the DAC5688IRGCT?
Key applications include cellular base stations, broadband wireless access, WiMAX 802.16, fixed wireless backhaul, and cable modem termination systems.
- Does the DAC5688IRGCT have an on-chip voltage reference?
Yes, the device includes an on-chip 1.2-V reference.
- What is the range of the differential scalable output current?
The differential scalable output current ranges from 2 to 20 mA.
- How does the DAC5688IRGCT handle clock multiplication?
The device features a 2x-32x clock multiplying PLL/VCO.
