1FEATURES

23• 10-Bit, 500-kSPS SAR ADC:

– 8 External Analog Inputs

– VREF, 2 × VREF Input Ranges

• Four 10-Bit Monotonic DACs:

– 0 to 5-V Output Range

– Up to 10-mA Sink and Source Capability

– Power-On Reset to 0 V

• Internal 2.5-V Reference

• Internal Temperature Sensor:

– –40°C to +125°C Operation

– Accuracy of ±2.5°C

• 12 General-Purpose I/O Ports:

– 1.8-V to 5.5-V Operation

• Low-Power SPI™-Compatible Serial Interface:

– 4-Wire Mode, 1.8-V to 5.5-V Operation

– SCLK up to 30 MHz

• Temperature Range: –40°C to +105°C

• Low Power: 32.5 mW at 5 V, Full Operating

Conditions

• Space-Saving Package: 36-pin,

6-mm x 6-mm QFN

APPLICATIONS

• Cellular Base Stations

• RF Communication Systems

• Optical Networks

• General-Purpose Monitor and Control

DESCRIPTION

The AMC7891 is a highly-integrated, low-power,

complete analog monitoring and control system in a

very small package.

For monitoring functions, the AMC7891 has 8

uncommitted inputs multiplexed into a 10-bit SAR

analog-to-digital converter (ADC) and an accurate

on-chip temperature sensor. Control signals are

generated through four, independent, 10-bit

digital-to-analog converters (DACs). Additional digital

signal monitoring and control is accomplished through

twelve configurable GPIOs. An internal reference can

be used to drive the ADC and DACs.

Communication to the device is performed through a

versatile, four-wire serial interface compatible with

industry-standard microprocessors and

microcontrollers. The serial interface can operate at

clock rates up to 30 MHz, allowing quick access to

critical system data.

The device is characterized for operation over the

temperature range of –40ºC to 105ºC and is available

in a very small, 36-pin, 6-mm x 6-mm QFN package.

The AMC7891’s low power, small size and

high-integration make it an ideal low-cost, bias control

circuit for modern RF transistor modules such as the

power amplifiers (PA) and low-noise amplifiers (LNA)

found in RF communication systems. The AMC7891

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. See

http://www.ti.com/amc.