AMC7834 Datasheet, PDF (1/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

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AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with
Temperature, Current and Voltage Supervision Capabilities
1 Features
•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
2 Applications
• Communications Infrastructure:
– Cellular Base Stations
– Microwave Backhaul
– Optical Networks
• General-Purpose Monitor and Control
• Data Acquisition Systems
3 Description
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
AMC7834
VQFN (56)
8.00 mm × 8.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
AMC7834
Remote
Sensor
Driver
Temperature
Sensor
2.5-V Reference
ADC
DAC
DAC
AUXDAC
GPIO Control
AUXDAC
4 GPIOs
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.