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CURRENT FEEDBACK AMPLIFIERS/DRIVERS High Output Drive 26 dBm Differential Line Drive for ADSL Transmitters 40 V p Differential Output Voltage, RL = 50 ⍀ @ 1 MHz 500 mA Continuous Current, RL = 5 ⍀ 1 A Peak Current, 1% Duty Cycle, RL = 15 ⍀ for DMT Low Distortion –68 dB @ 1 MHz THD, RL = 100 ⍀, V O = 40 V p High Speed 120 MHz Bandwidth (–3 dB) 1500 V/␮s Differential Slew Rate, VO = 10 V 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, RL = 200 ⍀ High Speed 100 MHz Bandwidth (–3 dB) 180 V/␮s Slew Rate High Output Drive 70 mA Output Current Drive APPLICATIONS ADSL, VDSL & HDSL Line Interface Driver & Receiver CRT Convergence & Astigmatism Adjustment Coil & Transformer Drivers Composite Audio Amplifiers PRODUCT DESCRIPTION

RECEIVER B

FUNCTIONAL BLOCK DIAGRAM

AD816

15

OUT2 RECEIVER

13

–IN2 RECEIVER

12

+IN2 RECEIVER +IN2 DRIVER

10

B

NC

14

11

TAB IS +VS

DRIVER A & B

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

–IN2 DRIVER

9 +VS 8 –VS 7

OUT2 DRIVER +VS

6

OUT1 DRIVER

5

–IN1 DRIVER

4

+IN1 DRIVER

3

+IN1 RECEIVER

2 1

–IN1 RECEIVER

A RECEIVER A

a

500 mA Differential Driver & Dual Low Noise (VF) Amplifiers AD816

–VS

OUT1 RECEIVER

NC = NO CONNECT

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 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).

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.

REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 1996


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