AMC7891
Overview
The AMC7834 device is a highly-integrated, lowpower, analog monitoring and control solution for power-amplifier (PA) biasing capable of temperature, current and voltage supervision. The device integrates a multi-channel, 12-bit analogto-digital converter (ADC); eight, 12-bit digital-toanalog converters (DAC); four high-side currentsense amplifiers that can be optionally set to operate as part of four independent closed-loop drain-current controllers; an accurate on-chip temperature sensor and two remote temperature-sensor diode drivers; four configurable general-purpose I/O p.
- 1 Eight Monotonic 12-bit DACs With Programmable Ranges - Four Bipolar DACs: -4 to 1 V, -5 to 0 V, and 0 to 5 V - Four Unipolar DACs: 0 to 5 V, and 2.5 to 7.5 V - High Current Drive Capability: up to ±10 mA - Selectable Clamp Voltage
- Multi-Channel 12-bit SAR ADC - Four External Analog Inputs: 0 to 2.5 V Range - Four Internal Inputs for Bipolar DAC Monitoring - Programmable Out-of-Range Alarms
- Four High-Side Current-Sense Amplifiers - Common Mode Voltages: 4 to 60 V - Optional Closed-Loop Drain-Current Controller Operation
- Temperature Sensing Capabilities - Internal Temperature Sensor - Two Remote Temperature-Diode Drivers
- Internal 2.5 V Reference
- Four General-Purpose I/O Ports (GPIOs)
- Low-Power SPI-Compatible Serial Interface - 4-Wire Mode, 1.7 to 3.6 V Operation
- Operating Temperature Range: -40°C to +125°C
- Available in a 56-Pin VQFN Package
