AMC7834 Texas instruments

AMC7834

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AMC7834

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Описание

The AMC7834 device is a highly-integrated, low-power, 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 analog-to-digital converter (ADC); eight, 12-bit digital-to-analog converters (DAC); four high-side current-sense 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 ports (GPIOs); and an accurate internal reference. The high level of integration significantly reduces component count and simplifies PA-biasing system designs. The function integration and wide operating-temperature range of the device make it suitable as an all-in-one, low-cost, bias control-circuit for PAs found in multi-channel RF communication systems. The flexible DAC output ranges and wide common mode voltage current sensors allow the device to be used as a biasing solution for a large variety of transistor technologies such as LDMOS, GaAs, and GaN. The AMC7834 feature set is similarly beneficial in general-purpose monitor and control systems. For applications that require a different channel-count, additional features, or converter resolutions, Texas Instruments offers a complete family of analog monitor and control (AMC) products. For more information, go to www.ti.com/amc.

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

Number of ADC channels	8
ADC resolution (Bits)	12
Number of DAC channels	8
DAC resolution (Bits)	12
Temperature sensing	Local, Remote
Number of GPIOs	4
Interface type	SPI
Features	GPIO, Temp Sensor
Operating temperature range (°C)	-40 to 125
Rating	Catalog
ADC sampling rate (ksps)	62.5
ADC analog input range (min) (V)	0
ADC analog input range (max) (V)	2.5
DAC settling time (µs)	10
DAC output full-scale (min) (V)	-5
DAC output full-scale (max) (V)	7.5