AD816AY Analog Devices, AD816AY Datasheet

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AD816AY

Manufacturer Part Number
AD816AY
Description
18V; 500mA differential driver and dual noise (VF) amplifier. For ADSL, VDSL and HDSL line interface driver and receiver
Manufacturer
Analog Devices
Datasheet

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AD816AY
Manufacturer:
MICRON
Quantity:
10
a
PRODUCT DESCRIPTION
The AD816 consists of two high current drive and two low
noise amplifiers. These can be configured differentially for driv-
ing 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. B
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.
FEATURES
Flexible Configuration
Thermal Overload Protection
CURRENT FEEDBACK AMPLIFIERS/DRIVERS
High Output Drive
Low Distortion
High Speed
VOLTAGE FEEDBACK AMPLIFIERS/RECEIVERS
High Input Performance
Low Distortion
High Speed
High Output Drive
APPLICATIONS
ADSL, VDSL and HDSL Line Interface Driver and Receiver
CRT Convergence and Astigmatism Adjustment
Coil and Transformer Drivers
Composite Audio Amplifiers
Two Low Noise Voltage Feedback Amplifiers with
26 dBm Differential Line Drive for ADSL Transmitters
40 V p-p Differential Output Voltage, R
500 mA Continuous Current, R
1 A Peak Current, 1% Duty Cycle, R
–68 dB @ 1 MHz THD, R
120 MHz Bandwidth (–3 dB)
1500 V/ s Differential Slew Rate, V
70 ns Settling Time to 0.1%
4 nV/ Hz Voltage Noise
15 mV Max Input Offset Voltage
–68 dB @ 1 MHz THD, V
100 MHz Bandwidth (–3 dB)
180 V/ s Slew Rate
70 mA Output Current Drive
Two High Current Drive Amplifiers, Ideal for an ADSL
Differential Driver or Single Ended Drivers for Low
Impedance Loads such as CRT Coils
High Current Drive, Ideal for ADSL Receivers or
Drivers for Low Impedance Loads such as CRT Coils
L
O
= 100
= 10 V p-p, R
L
= 5
, V
O
L
O
= 10 V p-p, G = +5
= 15
= 40 V p-p
L
L
= 50
= 200
for DMT
@ 1 MHz
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
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 . The drivers have 120 MHz of
bandwidth and 1,500 V/ s of differential slew rate while
featuring total harmonic distortion of –68 dB at 1 MHz into a
100
munication subscriber line drivers.
The low noise voltage feedback amplifiers are fully independent
and can be configured differentially for use as receiver amplifi-
ers 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/ s 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).
500 mA Differential Driver and
Dual Low Noise (VF) Amplifiers
load, specifications required for high frequency telecom-
TAB IS
+V
S
FUNCTIONAL BLOCK DIAGRAM
NC = NO CONNECT
World Wide Web Site: http://www.analog.com
B
A
+V
–V
S
S
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
© Analog Devices, Inc., 1999
AD816*
NC
OUT2 RECEIVER
–IN2 RECEIVER
+IN2 RECEIVER
+IN2 DRIVER
–IN2 DRIVER
OUT2 DRIVER
+V
–V
OUT1 DRIVER
–IN1 DRIVER
+IN1 DRIVER
+IN1 RECEIVER
–IN1 RECEIVER
OUT1 RECEIVER
S
S

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AD816AY Summary of contents

Page 1

... CRT Monitors. REV. B 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 ...

Page 2

AD816–SPECIFICATIONS DRIVER AMPLIFIERS (@ Model DYNAMIC PERFORMANCE Small Signal Bandwidth (–3 dB) Bandwidth (0.1 dB) Differential Slew Rate Settling Time to 0.1% NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion (Differential) Input Voltage Noise Input Current Noise ...

Page 3

RECEIVER AMPLIFIERS (@ T Model DYNAMIC PERFORMANCE Small Signal Bandwidth (–3 dB) Bandwidth (0.1 dB) Slew Rate Settling Time to 0.1% NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion Input Voltage Noise Current Noise Differential Gain Error Differential Phase Error DC PERFORMANCE Input ...

Page 4

... PIN CONFIGURATION Y-15 TOP VIEW Model Temperature Range AD816AY – +85 C AD816AYS – +85 C AD816AVR – +85 C CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. ...

Page 5

LOAD RESISTANCE – (Differential – Figure 2. Driver Output Voltage Swing vs. Load Resistance 100 INVERTING INPUT CURRENT NOISE 10 NONINVERTING INPUT CURRENT NOISE INPUT VOLTAGE NOISE 1 10 100 1k ...

Page 6

AD816–Typical Driver Performance Characteristics 1400 1200 1000 800 600 400 200 OUTPUT STEP SIZE – V p-p Figure 8. Driver Slew Rate vs. Output Step Size + ...

Page 7

BACK TERMINATED LOADS (25 ) 0.04 0.03 0.02 PHASE 0.01 0.00 –0.01 –0.02 GAIN –0.03 –0. BACK TERMINATED LOADS (75 ) 0.010 0.005 0.000 PHASE –0.005 –0.010 –0.015 GAIN –0.020 –0.025 ...

Page 8

AD816–Typical Driver Performance Characteristics 1k +15V AD816 PULSE 55 DRIVER A/B GENERATOR 100 250ps R F –15V Figure 20. Test Circuit Gain = –1 Figure 21. Driver 500 mV Step Response, G ...

Page 9

FREQUENCY – Hz Figure 28. Receiver Input Voltage Noise Spectral Density OUT 2 100 –1 – ...

Page 10

AD816–Typical Receiver Performance Characteristics 2.2pF 1k +15V 0 AD816 REC A PULSE 50 GENERATOR –15V 500ps R F Figure 34. Test Circuit, Gain = +2 Figure 35. Receiver ...

Page 11

THEORY OF OPERATION (DRIVER) The AD816 driver is a dual current feedback amplifier with high (500 mA) output current capability. Being a current feedback amplifier, the AD816 driver’s open-loop behavior is expressed as transimpedance ...

Page 12

AD816 PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS expected for a wideband amplifier, PC board parasitics can affect the overall closed-loop performance. Of concern are stray capacitances at the output and the inverting input nodes ground plane ...

Page 13

Normally, the AD816 will be soldered directly to a copper pad. Figure 47 plots against size of copper pad. This data pertains JA to copper pads on both sides of G10 epoxy glass board connected together with a grid of ...

Page 14

AD816 APPLICATIONS ADSL Transceiver The AD816 is designed for the primary purpose of providing an integrated solution for the transmit and receive functions of an ADSL modem. ADSL or Asymmetrical Digital Subscriber Line is a means for delivering up to ...

Page 15

R101 and all the downstream circuitry comprised of T1, the transmission line and its termination. For an ideal transformer, transmission line and termination, this will appear and thus the signal appearing at Pins 1 and ...

Page 16

AD816 15-Lead Surface Mount DDPAK (VR-15) 0.110 (2.79) 0.152 (3.86) 0.394 BSC 0.148 (3.76) (10.007) 0.137 (3.479) TYP 0.042 (1.066) TYP 0.080 (2.03 0.065 (1.65) 0.146 (3.70) 2 PLACES PIN 1 0.138 (3.50) 0.079 (2.006) 0.600 (15.24) DIA ...

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