AD5449 Dual 12-Bit, High Bandwidth Multiplying DAC with Serial Interface

The AD5429/AD5439/AD5449 are CMOS, 8-, 10-, and 12-bit, dual-channel, current output digital-to-analog converters (DAC), respectively. These devices operate from a 2.5 V to 5.5 V power supply, making them suited to battery-powered and other applications. As a result of being manufactured on a CMOS submicron process, these parts offer excellent 4-quadrant multiplication characteristics, with large signal multiplying bandwidths of 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 current-to-voltage precision amplifier. These DACs use a double-buffered, 3-wire serial interface that is compatible with SPI, QSPI™, MICROWIRE™, and most DSP interface standards. In addition, a serial data out (SDO) pin allows daisy-chaining when multiple packages are used. Data readback allows the user to read the contents of the DAC register via the SDO pin. On power-up, the internal shift register and latches are filled with 0s, and the DAC outputs are at zero scale. The AD5429/AD5439/AD5449 DACs are available in 16-lead TSSOP packages. The EV-AD5415/49SDZ evaluation board is available for evaluating DAC performance. For more information, see the UG-297 evaluation board user guide. 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

Features and Benefits

10 MHz Multiplying Bandwidth
INL of ±0.25 LSB @ 8 bits
16-lead TSSOP package
2.5 V to 5.5 V supply operation
±10 V reference input
50 MHz serial interface
2.47 MSPS update rate
Extended temperature range: −40°C to +125°C

4-quadrant multiplication
Power-on reset
0.5 μA typical current consumption
Guaranteed monotonic
Daisy-chain mode
Readback function

Digital to Analog Converters

D/A Converters

Data Sheets

Document	note
AD5429/AD5439/AD5449: Dual 8-/10-/12-Bit, High Bandwidth, Multiplying DACs with Serial Interface Data Sheet (Rev. F)	PDF 723 kB

Application Notes

Document	note
AN-1107: AC Signal Offset and Amplitude Control Using a Dual Channel Multiplying DAC and a Single I/V Converter (Rev. 0)	PDF 372 kB
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-297: Evaluating the AD5449 Serial Input, Dual-Channel Current Output DAC	PDF 840 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD5449YRU Production	16 ld TSSOP	OTH 96	-40 to 125C	0	0	N
AD5449YRU-REEL Production	16 ld TSSOP	REEL 2500	-40 to 125C	0	0	N
AD5449YRU-REEL7 Production	16 ld TSSOP	REEL 1000	-40 to 125C	0	4.31	N
AD5449YRUZ Production	16 ld TSSOP	OTH 96	-40 to 125C	4.54	3.72	Y