Overview
The DAC904E/2K5G4, produced by Texas Instruments, is a high-speed Digital-to-Analog Converter (DAC) that offers a 14-bit resolution. This component is part of a family of high-performance converters, including the DAC908, DAC900, and DAC902, which provide 8-, 10-, and 12-bit resolutions, respectively. The DAC904 is designed for applications requiring high dynamic performance and is particularly suited for communication systems, waveform generation, medical/ultrasound, high-speed instrumentation, and video/digital TV.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | - | - | 14 | - | Bits |
| Output Update Rate | 2.7V to 3.3V | 125 | 165 | - | MSPS |
| Output Update Rate | 4.5V to 5.5V | 165 | 200 | - | MSPS |
| Differential Nonlinearity (DNL) | fCLOCK = 25MSPS, fOUT = 1.0MHz | - | ±2.5 | - | LSB |
| Integral Nonlinearity (INL) | fCLOCK = 25MSPS, fOUT = 1.0MHz | - | ±3.0 | - | LSB |
| Spurious-Free Dynamic Range (SFDR) | fOUT = 1.0MHz, fCLOCK = 25MSPS | 72 | 79 | - | dBc |
| Output Settling Time | - | - | 30 | - | ns |
| Output Rise/Fall Time | - | - | 2 | - | ns |
| Glitch Impulse | - | - | 3 | - | pV-s |
| Full-Scale Output Range | - | 2.0 | 20.0 | - | mA |
| Supply Voltages | - | +2.7 | +5.5 | - | V |
| Power Dissipation | +5V, IOUT = 20mA | 170 | 230 | - | mW |
| Power Dissipation (Power-Down Mode) | - | - | 45 | - | mW |
Key Features
- High-speed operation with update rates up to 165 MSPS
- 14-bit resolution with high dynamic performance
- Single +5V or +3V operation with low power consumption (170mW at +5V, 50mW at +3V)
- High Spurious-Free Dynamic Range (SFDR): up to 64dBc at 100MSPS
- Low glitch impulse: 3pV-s
- Internal 1.24V bandgap reference with optional external reference
- Adjustable full-scale output current range: 2-20mA
- Differential or single-ended analog signal interface
- Power-down mode for reduced standby power (45mW)
- Available in SO-28 and TSSOP-28 packages
Applications
- Communication transmit channels: WLL, cellular base stations, digital microwave links, cable modems
- Waveform generation: Direct Digital Synthesis (DDS), Arbitrary Waveform Generation (ARB)
- Medical/ultrasound applications
- High-speed instrumentation and control
- Video and digital TV applications
Q & A
- What is the resolution of the DAC904E/2K5G4?
The DAC904E/2K5G4 has a 14-bit resolution.
- What are the typical operating supply voltages for the DAC904E/2K5G4?
The DAC904E/2K5G4 can operate on a single supply voltage ranging from +2.7V to +5.5V.
- What is the maximum output update rate of the DAC904E/2K5G4?
The maximum output update rate is up to 165 MSPS for 2.7V to 3.3V and up to 200 MSPS for 4.5V to 5.5V.
- What is the Spurious-Free Dynamic Range (SFDR) of the DAC904E/2K5G4?
The SFDR can be up to 64dBc at 100MSPS.
- Does the DAC904E/2K5G4 have an internal reference?
Yes, it has an internal 1.24V bandgap reference, but it also supports an external reference.
- What is the power consumption of the DAC904E/2K5G4 in normal operation and power-down mode?
In normal operation, it consumes up to 170mW at +5V and 50mW at +3V. In power-down mode, it consumes 45mW.
- What are the available package options for the DAC904E/2K5G4?
The DAC904E/2K5G4 is available in SO-28 and TSSOP-28 packages.
- Can the DAC904E/2K5G4 be used in differential or single-ended configurations?
Yes, it supports both differential and single-ended analog signal interfaces.
- What is the typical output settling time of the DAC904E/2K5G4?
The output settling time is typically 30 ns to 0.1%.
- What are some common applications of the DAC904E/2K5G4?
Common applications include communication transmit channels, waveform generation, medical/ultrasound, high-speed instrumentation, and video/digital TV.
