PRODUCT DESCRIPTION

The AD816 consists of two high current drive and two low noise amplifiers. These can be configured differentially for driving low impedance loads and receiving signals over twisted pair cable or could be used independently for single ended driving application such as correction circuits within high resolution CRT Monitors.

The two high output drive amplifiers are capable of supplying a minimum of 500 mA continuous output current and up to 1A peak output current, and when configured differentially, 40 V p-p differential output swing can be achieved on ±15 V supplies into a load of 50 Ω. The drivers have 120 MHz of bandwidth and 1,500 V/µs of differential slew rate while featuring total harmonic distortion of –68 dB at 1 MHz into a 100 Ω load, specifications required for high frequency telecommunication subscriber line drivers.

The low noise voltage feedback amplifiers are fully independent and can be configured differentially for use as receiver amplifiers within a subscriber line hybrid interface or individually for signal conditioning or filtering. The low noise of 4 nV/√Hz and distortion of –68 dB at 1 MHz enable low level signals to be resolved and amplified in the presence of large common-mode voltages. 100 MHz of bandwidth and 180 V/µs of slew rate combined with a load drive capability of 70 mA enable these amplifiers to drive passive filters and low inductance coils. The AD816 has thermal overload protection for system reliability and is available in low thermal resistance power packages. The AD816 operates over the industrial temperature range (–40°C to +85°C).

FEATURES

Flexible Configuration

Two Low Noise Voltage Feedback Amplifiers with

High Current Drive, Ideal for ADSL Receivers or

Drivers for Low Impedance Loads such as CRT Coils

Two High Current Drive Amplifiers, Ideal for an ADSL

Differential Driver or Single Ended Drivers for Low

Impedance Loads such as CRT Coils

Thermal Overload Protection

CURRENT FEEDBACK AMPLIFIERS/DRIVERS

High Output Drive

26 dBm Differential Line Drive for ADSL Transmitters

40 V p-p Differential Output Voltage, RL = 50 V @ 1 MHz

500 mA Continuous Current, RL = 5 V

1 A Peak Current, 1 Duty Cycle, RL = 15 V for DMT

Low Distortion

–68 dB @ 1 MHz THD, RL = 100 V, VO = 40 V p-p

High Speed

120 MHz Bandwidth (–3 dB)

1500 V/ms Differential Slew Rate, VO = 10 V p-p, G = +5

70 ns Settling Time to 0.1

VOLTAGE FEEDBACK AMPLIFIERS/RECEIVERS

High Input Performance

4 nV/√Hz Voltage Noise

15 mV Max Input Offset Voltage

Low Distortion

–68 dB @ 1 MHz THD, VO = 10 V p-p, RL = 200 V

High Speed

100 MHz Bandwidth (–3 dB)

180 V/ms Slew Rate

High Output Drive

70 mA Output Current Drive

APPLICATIONS

ADSL, VDSL and HDSL Line Interface Driver and Receiver

CRT Convergence and Astigmatism Adjustment

Coil and Transformer Drivers

Composite Audio Amplifiers