The MAX15500/MAX15501 analog output conditioners provide a programmable current up to ±24mA, or a voltage up to ±12V proportional to a control voltage signal. The control voltage is typically supplied by an external DAC with an output voltage range of 0 to 4.096V for the MAX15500 and 0 to 2.5V for the MAX15501. The output current and voltage are selectable as either unipolar or bipolar. In the unipolar configuration, a control voltage of 5% full-scale (FS) produces a nominal output of 0A or 0V to achieve underrange capability. A control voltage of 100%FS produces one of two programmable levels (105%FS or 120%FS) to achieve overrange capability. The outputs of the MAX15500/MAX15501 are protected against overcurrent conditions and a short to ground or supply voltages up to ±35V. The devices also monitor for overtemperature and supply brownout conditions. The supply brownout threshold is programmable.
The MAX15500/MAX15501 are programmed through an SPI™ interface capable of daisy-chained operation. The MAX15500/MAX15501 provide extensive error reporting through the SPI interface and an additional open-drain interrupt output. The devices include an analog output to monitor load conditions.
The MAX15500/MAX15501 operate over the -40°C to +105°C temperature range. The devices are available in a 32-pin, 5mm x 5mm TQFN package.
Key Features
• Supply Voltage Up to ±32.5V
• Output Protected Up to ±35V
• Programmable Output (Plus Overrange)
º ±10V
º 0 to 10V
º 0 to 5V
° ±20mA
º 0 to 20mA
º 4 to 20mA
• Current Output Drives 0 to 1kΩ
• Voltage Output Drives Loads Down to 1kΩ
• HART Compliant
• 2ppm Gain Error Drift Over Temperature
• SPI Interface, with Daisy-Chain Capability
• Supports +4.096V (MAX15500) or +2.5V (MAX15501) Full-Scale Input Signals
• Extensive Error Reporting
º Short-Circuit and Overcurrent Protection
º Open-Circuit Detection
º Brownout Detection
º Overtemperature Protection
• Fast, 40µs Settling Time
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