ADL5315ACPZ-R7

ADL5315 is a wide input current range, precision high-side current mirror featuring a stable and user-adjustable input voltage. It is optimized for use with PIN photodiodes, but its flexibility and wide operating range make it suitable for a broad array of additional applications. Over the 3nA to 3mA range, the current sourced from the INPT pin is accurately mirrored with a 1:1 ratio and sourced from the IOUT output pin. In a typical photodiode application, the output drives a current input logarithmic amplifier to produce a linear-in-dB output representing the optical power incident upon the photodiode. For linear voltage output, a single resistor to ground is all that is required. The photodiode anode can be connected to a high speed trans impedance amplifier for the extraction of the data stream. It is used in application such as optical power monitoring from a single photodiode, general voltage biasing with precision current monitoring, voltage-to-current conversion.

• Stable mirror input voltage
• Voltage held 1V below supply using internal reference or can be set externally
• Adjustable input current limit
• Single-supply operation is 2.7V to 8V
• Quiescent current is 1.8mA typical at (IINPT = 3µA, VPOS = 5V, VSET = 4V)
• Small signal bandwidth is 1MHz typical at (VPOS = 5V, VSET = 4V, IINPT = 3µA, TA = 25°C)
• Wideband noise at IPDM is 20nA rms typ at (INPT = 3µA, CSET = 2.2nF)
• Operating temperature is -40°C to 85°C
• Package style is 8-lead LFCSP

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