Integrated Power-Amplifier Monitor and Control System - AMC7834

AMC7834 (ACTIVE)

Integrated Power-Amplifier Monitor and Control System

 

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.

Features

  • 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

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Parametrics Compare all products in Integrated Precision ADCs and DACs

 
ADC Input Channels (#)
ADC Resolution (Bits)
DAC Channels
DAC: Resolution (Bits)
Temperature Sensing
GPIOs
Interface
Special Function
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
ADC: Sampling Rate (KSPS)
ADC: Analog Input Range (Min) (V)
ADC: Analog Input Range (Max) (V)
DAC: Settling Time (uS)
DAC: Output Full Scale (Min) (V)
DAC: Output Full Scale (Max) (V)
Pin/Package
AMC7834 AMC7812B AMC7823 AMC7832 AMC7836
8    16    8    17    21   
12    12    12    12    12   
8    12    8    12    16   
12    12    12    12    12   
Local
Remote   
Local
Remote   
Local
Remote   
Local    Local   
4    8    6    8    8   
SPI    SPI
I2C   
SPI    SPI    SPI   
4 High Common-Mode Current Sensors    Temp Sensor    Current Source up to 10 mA    8 GPIOs
Internal Temp Sensor   
8 GPIOs
Internal Temp Sensor   
-40 to 125    -40 to 125    -40 to 85    -40 to 125    -40 to 125   
QFN    HTQFP
VQFN   
WQFN    HTQFP    HTQFP   
56QFN: 64 mm2: 8 x 8(QFN)    64HTQFP: 144 mm2: 12 x 12(HTQFP)
64VQFN: 81 mm2: 9 x 9(VQFN)   
40WQFN: 36 mm2: 6 x 6(WQFN)    64HTQFP: 144 mm2: 12 x 12(HTQFP)    64HTQFP: 144 mm2: 12 x 12(HTQFP)   
62.5    500    200    87    87   
0    -5    0    -12.5    -12.5   
2.5    5    5    12.5    12.5   
10    2    2    10    10   
-5    0    0    -10    -10   
7.5    12.5    5    10    10   
56QFN    64HTQFP
64VQFN   
40WQFN    64HTQFP    64HTQFP