*mydirectindustry

Catalogs
Rockwell Scientific
Digital to Analog Converters (DAC) RDA012M4MS

Digital to Analog Converters (DAC) RDA012M4MS

Product catalog summary

Overview:
The RDA012M4MS is a high-performance 12-bit digital-to-analog converter (DAC) featuring a 4:1 input multiplexer and a maximum update rate of 1.3 GS/s. It is ideal for high-speed data conversion and synchronization applications, such as I-Q modulation schemes.

Key Features:

12-bit resolution with a 1.3 GS/s sampling rate.
4:1 input multiplexer for efficient data handling.
Master-slave operation for synchronized multi-device setups.
Differential analog output with a 600 mV swing on 50 Ω termination.
Compatible with 3.3V NMOS data inputs and differential ECL or sinusoidal clock inputs.
LVDS compatible clock output.
10-bit static linearity and reference output/input pin for full-scale adjustment.
Operates on 3.3V and -5.2V power supplies.

Product Description:
The DAC uses a segmented current source to minimize glitch energy and enhance linearity, with internal 50Ω termination for optimal dynamic performance. It outputs a nominal full-scale current of 12mA and interfaces with CMOS ICs through low voltage NMOS compatible digital data inputs.

Ordering Information:

RDA012M4MS-DI: 12 BIT 4:1 MUX 1.3GS/s DAC, DIE
RDA012M4MS-HD: 12 BIT 4:1 MUX 1.3GS/s DAC, 77 Lead HSD Package
RDA012M4MS-QP: 12 BIT 4:1 MUX 1.3GS/s DAC, 88 Lead QFP Package
Evaluation boards available for both HD and QP packages.

Specifications:
Absolute Maximum Ratings:

Supply voltages: -0.3V to +3.8V
RF input voltages: -3V to 1V
Temperature range: -40 to +85 °C (case), -60 to 125 °C (storage)

DC Electrical Specifications:

Differential nonlinearity (DNL) and integral nonlinearity (INL) both at 4 LSB max.
Full-scale output swing: 1140 to 1260 mVpp (differential), 570 to 630 mVpp (single-ended).
Power dissipation: Total 3.3W, with specific dissipation for positive and negative supplies.

AC Electrical Specifications:

Spurious-Free Dynamic Range (SFDR) varies with frequency, e.g., 56 dBc at 800MHz clock.
Data timing setup and hold times specified for optimal performance.

Operating Conditions:

High clock input amplitude: 400 to 800 mV (differential ECL).
Digital input high and low voltages: 0.9V to VCC and -0.4V to 0.4V, respectively.
Operating temperature: -40 to 85 °C (case), with a junction temperature up to 125 °C.

Pin Descriptions:
Detailed pin descriptions and layouts are provided for both HSD and QFP packages, including power supply, reference voltage, clock inputs, and digital bit inputs.

Theory of Operation:
The DAC employs 6-bit segmentation for enhanced performance, with digital data inputs latched by a master-slave flip-flop to reduce data skew. It supports master and slave mode operations for synchronized multi-device configurations, ideal for applications like quadrature modulation.

Procedures:
In slave mode, the MUXDAC synchronizes with a 250MHz LVDS clock from the master MUXDAC. The output clock signals are LVDS compliant and require a 100Ω termination resistor. Data input setup and hold times are specified with respect to the LCLKO.

Analog Output:
The DAC outputs should be connected through a 50 Ω resistor to ground, providing a full-scale amplitude of 0.6 volts, or 1.2 volts differentially. The output termination voltage should not exceed 3 volts for reliable operation.

Reference:
VREFA controls the full-scale amplitude output, with an internal reference circuit providing -2.0 volts. For precise full-scale output, an external voltage reference with low output impedance can be used. The output full-scale voltage is calculated as VFS = 0.3xVREF.

Typical Operating Circuits:
Figures illustrate typical operating circuits using internal and external voltage references, and recommended placement in master-slave mode to minimize LCLK routing.

Performance:
Figures display the output spectrum at various clock frequencies, demonstrating the device's performance.

Package Information:
The RDA012M4MS is available in 77 Lead HSD and 88 Lead QFP packages, both featuring a heatsink slug on the bottom. The thermal resistance from junction to case is approximately 3.5 C/W for the QFP package. Figures provide dimensions and footprints for these packages.

Digital to Analog Converters (DAC) RDA012M4MS

Digital to Analog Converters (DAC) RDA012M4MS

All Rockwell Scientific catalogs and technical brochures

Archived catalogs