AD5445 High Bandwidth 12-Bit Parallel Interface Multiplying D/A Converter

The AD5424/AD5433/AD5445 are CMOS 8-, 10-, and 12-bit current output digital-to-analog converters (DACs), respectively. These devices operate from a 2.5 V to 5.5 V power supply, making them suitable for battery-powered applications and many other applications. These DACs utilize 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.

As a result of manufacturing with a CMOS submicron process, they offer 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.

While these devices are upgrades of the AD5424/AD5433/ AD5445 in multiplying bandwidth performance, they have a latched interface and cannot be used in transparent mode.

The AD5424 is available in a small, 20-lead LFCSP and a small, 16-lead TSSOP, while the AD5433 and AD5445 DACs are available in a small, 20-lead LFCSP and a small, 20-lead TSSOP. The EVAL-AD5445SDZ evaluation board is available for evaluating DAC performance. For more information, see the UG-333 evaluation board user guide.

Applications

Features and Benefits

2.5 V to 5.5 V supply operation
Fast parallel interface (17 ns write cycle)
Update rate of 20.4 MSPS
INL of ±1 LSB for 12-bit DAC

10 MHz multiplying bandwidth
±10 V reference input
Extended temperature range:
–40°C to +125°C
See data sheet for additional features

Digital to Analog Converters

D/A Converters

Data Sheets

Document	note
AD5424/AD5433/AD5445: 8-/10-/12-Bit, High Bandwidth Multiplying DACs with Parallel Interface Data Sheet (Rev. E)	PDF 1094 kB

Application Notes

Document	note
AN-912: Driving a Center-Tapped Transformer with a Balanced Current-Output DAC (Rev. 0)	PDF 246 kB
AN-320A: CMOS Multiplying DACs and Op Amps Combine to Build Programmable Gain Amplifier, Part 1	PDF 1295 kB
AN-137: A Digitally Programmable Gain and Attenuation Amplifier Design	PDF 52 kB

User Guides

Document	note
UG-333: Evaluating the AD5445 Parallel Input, Current Output DAC	PDF 315 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD5445YCPZ Production	20 ld LFCSP 4x4mm (2.1EP)	OTH 490	-40 to 125C	3.89	3.15	Y
AD5445YRU Production	20 ld TSSOP	OTH 75	-40 to 125C	0	0	N
AD5445YRUZ Production	20 ld TSSOP	OTH 75	-40 to 125C	3.89	3.15	Y
AD5445YRUZ-REEL Production	20 ld TSSOP	REEL 2500	-40 to 125C	0	3.15	Y
AD5445YRUZ-REEL7 Production	20 ld TSSOP	REEL 1000	-40 to 125C	0	3.15	Y