Sunnyvale, Calif. Maxim Integrated Products Inc. says this 10-bit, dual, digital-to-analog (D/A) converter for fiber-optic applications can sink 3.6 milliamps of current per output.
Each output has two current sink ranges; 0 to 1.2 mA and 0 to 3.6 mA. The range and value of sink current for each output is independently set using a 10-MHz, SPI-compatible serial interface. For applications requiring higher sink currents, the two outputs of the MAX5547 can be connected in parallel to sink a maximum of 7.2 mA.
This D/A converter integrates a precision 4 ppm/°C bandgap reference, operates from a single +2.7 volt to +5.25-V supply, and fits in a 3 x 3-mm, 8-pin TDFN package.
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The D/A converters are stabilized over temperature by the MAX5547's precision +2.5-V internal 4 ppm/°C reference. This reference is available externally and may be used as the system reference. Additionally, the internal reference may be turned off and an external 2.5-V reference can be used.
The MAX5547 D/A converter is also accurate (±4 least significant bit (LSB) at 1.2 mA, and guaranteed monotonic over the extended operating temperature range of -40°C to +85°C. The device settles to within 1 LSB of full scale in 10 microseconds (typical).
The current-sink operation of this D/A converter makes it suited for laser-driver control applications, including pin-diode bias current, modulation currents, and average power and extinction ratios, according to Maxim.
Pricing for the MAX5547 starts at $3.19 (1000-up, FOB USA). Click here for the preliminary MAX5547 data sheet.
Maxim Integrated Products Inc., 1-800-998-8800, www.Maxim-ic.com.