Overview
The AD9708AR, produced by Analog Devices Inc., is an 8-bit resolution member of the TxDAC series of high-performance, low-power CMOS digital-to-analog converters (DACs). This device is part of a family that includes pin-compatible 8-, 10-, 12-, and 14-bit DACs, optimized for the transmit signal path of communication systems. The AD9708 offers exceptional AC and DC performance, supporting update rates up to 125 MSPS, making it suitable for various high-speed applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 8 |
| Update Rate | Up to 125 MSPS |
| Output Type | Current - Unbuffered |
| Differential Output | Yes |
| Data Interface | Parallel |
| Reference Type | External, Internal |
| Voltage - Supply, Analog/Digital | 2.7 V to 5.5 V |
| INL/DNL (LSB) | ±0.25, ±0.25 |
| Settling Time | 35 ns (Typ) |
| Full-Scale Output Current | Nominal 20 mA, adjustable from 2 mA to 20 mA |
| Output Impedance | > 100 kΩ |
| Operating Temperature | -40°C to 85°C |
| Package | 28-Lead SOIC and 28-Lead TSSOP |
Key Features
- High-speed operation with update rates up to 125 MSPS
- 8-bit resolution with linearity of ±0.25 LSB DNL and INL
- Differential current outputs for single-ended or differential applications
- Flexible single-supply operation from 2.7 V to 5.5 V
- Low power dissipation: 175 mW at 5 V, 45 mW at 3 V, and 20 mW in power-down mode
- On-chip 1.20 V reference and reference control amplifier
- Edge-triggered latches and segmented current source architecture
- Fast settling time of 35 ns to 0.1% full-scale
Applications
- Communications systems, particularly in the transmit signal path
- Signal reconstruction
- Instrumentation
- Portable and low-power applications
Q & A
- What is the resolution of the AD9708AR DAC?
The AD9708AR has an 8-bit resolution.
- What is the maximum update rate of the AD9708AR?
The AD9708AR supports update rates up to 125 MSPS.
- What type of output does the AD9708AR provide?
The AD9708AR provides differential current outputs.
- What is the supply voltage range for the AD9708AR?
The AD9708AR operates from a single supply voltage of 2.7 V to 5.5 V.
- How is the full-scale output current of the AD9708AR adjusted?
The full-scale output current can be adjusted from 2 mA to 20 mA using an external resistor (RSET) in combination with the on-chip reference control amplifier.
- What is the settling time of the AD9708AR?
The settling time is typically 35 ns to 0.1% full-scale.
- What are the package options for the AD9708AR?
The AD9708AR is available in 28-Lead SOIC and 28-Lead TSSOP packages.
- What is the operating temperature range for the AD9708AR?
The operating temperature range is -40°C to 85°C.
- Does the AD9708AR have a power-down mode?
Yes, the AD9708AR has a power-down mode that reduces standby power dissipation to approximately 20 mW.
- What are some typical applications of the AD9708AR?
Typical applications include communications systems, signal reconstruction, instrumentation, and portable low-power applications.
