AD5405| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

Dual 12-Bit, High Bandwidth, Multiplying DAC with 4-Quadrant Resistors and Parallel Interface

AD5405
FEATURES
10 MHz multiplying bandwidth On-chip 4-quadrant resistors allow flexible output ranges INL of 1 LSB 40-lead LFCSP package 2.5 V to 5.5 V supply operation 10 V reference input 21.3 MSPS update rate Extended temperature range: -40 C to 125 C 4-quadrant multiplication Power-on reset 0.5 A typical current consumption Guaranteed monotonic Readback function

GENERAL DESCRIPTION
The AD5405 1 is a CMOS, 12-bit, dual-channel, current output digital-to-analog converter (DAC). This device operates from a 2.5 V to 5.5 V power supply, making it suited to battery-powered and other applications. As a result of manufacture with a CMOS submicron process, the device offers excellent 4-quadrant multiplication characteristics, with large signal multiplying bandwidths of up to 10 MHz. The applied external reference input voltage (VREF) determines the full-scale output current. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external I-to-V precision amplifier. This device also contains the 4-quadrant resistors necessary for bipolar operation and other configuration modes. This DAC uses data readback, allowing the user to read the contents of the DAC register via the DB pins. On power-up, the internal register and latches are filled with 0s, and the DAC outputs are at zero scale. The AD5405 has a 6 mm 6 mm, 40-lead LFCSP pac
kage.
1

APPLICATIONS
Portable battery-powered applications Waveform generators Analog processing Instrumentation applications Programmable amplifiers and attenuators Digitally controlled calibration Programmable filters and oscillators Composite video Ultrasound Gain, offset, and voltage trimming
R3A R3 2R R2_3A R2 2R R2A

U.S. Patent Number 5,689,257.

FUNCTIONAL BLOCK DIAGRAM
VREF A R1A

AD5405
VDD DATA INPUTS DB0 DB11 INPUT BUFFER

R1 2R

RFB 2R RFBA

LATCH

12-BIT R-2R DAC A

IOUT1A IOUT2A

DAC A/B CS R/W LATCH LDAC POWER-ON RESET CONTROL LOGIC 12-BIT R-2R DAC B IOUT1B IOUT2B RFB B
04463-001

GND

R3 2R R3B R2_3B

R2 2R R2B

R1 2R VREFB R1B

RFB 2R

Figure 1. Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.