DAC5674

SLWS148A − SEPTEMBER 2003 − REVISED OCTOBER 2005

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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during

storage or handling to prevent electrostatic damage to the MOS gates.

The DAC5674 operates from an analog supply voltage of 3.3 V and a digital supply voltage of 1.8 V. The digital

I/Os are 1.8-V and 3.3-V CMOS compatible. Power dissipation is 500 mW at maximum operating conditions.

The DAC5674 provides a nominal full-scale differential current-output of 20 mA, supporting both single-ended

and differential applications. The output current can be directly fed to the load with no additional external output

buffer required. The device has been specifically designed for a differential transformer coupled output with a

50-

Ω doubly terminated load. For a 20-mA full-scale output current, both a 4:1 impedance ratio (resulting in an

output power of 4 dBm) and 1:1 impedance ratio transformer (−2-dBm output power) are supported. The latter

configuration is preferred for optimum performance at high output frequencies and update rates.

An accurate on-chip 1.2-V temperature compensated band-gap reference and control amplifier allows the user

to adjust the full-scale output current from 20 mA down to 2 mA. This provides 20-dB gain range control

capabilities. Alternatively, an external reference voltage may be applied for maximum flexibility. The device

features a SLEEP mode, which reduces the standby power to approximately 10 mW, thereby optimizing the

power consumption for the system’s need.

The DAC5674 is available in a 48-pin HTQFP PowerPAD

 plastic quad flatpack package. The device is

characterized for operation over the industrial temperature range of −40

°C to 85°C.

AVAILABLE OPTIONS

TA

PACKAGED DEVICES

48-HTQFP PowerPAD Plastic Quad Flatpack

−40

°C to 85°C

DAC5674IPHP

−40 C to 85 C

DAC5674IPHPR

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range unless otherwise noted(1)

UNIT

Supply voltage range

AVDD(2), CLKVDD(2), IOVDD(2), PLLVDD(2)

−0.5 V to 4 V

Supply voltage range

DVDD(3)

−0.5 V to 2.3 V

Voltage between AGND, DGND, CLKGND, PLLGND, and IOGND

−0.5 V to 0.5 V

D[13..0](3), HP1, HP2, DIV0(3), DIV1(3), PLLLOCK(3), RESET(3), X4(3)

−0.5 V to IOVDD + 0.5 V

Supply voltage range

IOUT1, IOUT2(2)

−1 V to AVDD + 0.5 V

Supply voltage range

EXTIO(2), EXTLO(2), BIASJ(2), SLEEP(2), CLK(2), CLKC(2), LPF(2)

−0.5 V to AVDD + 0.5 V

Peak input current (any input)

20 mA

Peak total input current (all inputs)

−30 mA

Operating free-air temperature range, TA: DAC5674I

−40

°C to 85°C

Storage temperature range

−65

°C to 150°C

Lead temperature 1,6 mm (1/16 inch) from the case for 10 seconds

260

°C

(1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) Measured with respect to AGND.

(3) Measured with respect to DGND.