Analog Devices AD816 Datasheet

500 mA Differential Driver and

OUT1 RECEIVER

–IN1 RECEIVER

+IN1 RECEIVER

+IN1 DRIVER

–IN1 DRIVER

OUT1 DRIVER

–V

S

+V

S

OUT2 RECEIVER

–IN2 DRIVER

+IN2 DRIVER

+IN2 RECEIVER

–IN2 RECEIVER

NC

TAB IS

+V

S

NC = NO CONNECT

OUT2 DRIVER

RECEIVER A RECEIVER B

AD816

–V

S

+V

S

DRIVER A & B

B

A

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

a

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, R
500 mA Continuous Current, R

L

1 A Peak Current, 1% Duty Cycle, R

Low Distortion

–68 dB @ 1 MHz THD, R

= 100 ⍀, VO = 40 V p-p

L

High Speed

120 MHz Bandwidth (–3 dB)
1500 V/␮s Differential Slew Rate, V
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, V

= 10 V p-p, RL = 200 ⍀

O

High Speed

100 MHz Bandwidth (–3 dB)
180 V/␮s 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

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.

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.

= 50 ⍀ @ 1 MHz

L

= 5 ⍀

= 15 ⍀ for DMT

L

= 10 V p-p, G = +5

O

Dual Low Noise (VF) Amplifiers

AD816*

FUNCTIONAL BLOCK DIAGRAM

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 telecom-

munication 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).

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1999

AD816–SPECIFICATIONS

DRIVER AMPLIFIERS

(@ TA = +25ⴗC, VS = ⴞ15 V dc, RF = 1 k⍀ and R

= 50 ⍀ unless otherwise noted)

LOAD

AD816A

Model Conditions V

S

Min Typ Max Units

DYNAMIC PERFORMANCE

Small Signal Bandwidth (–3 dB) G = +2, R

R

= 100 Ω±15 100 120 MHz

L

G = +2, R
R

= 100 Ω±5 90 110 MHz

L

Bandwidth (0.1 dB) G = +2, R

R

= 100 Ω±15 10 MHz

Differential Slew Rate V

L

OUT

= 499 Ω, V

F

= 499 Ω, V

F

= 499 Ω, V

F

= 0.125 V rms,

IN

= 0.125 V rms,

IN

= 0.125 V rms,

IN

= 10 V p-p, G = +5, R

= 100 Ω±15 1400 1500 V/µs

L

Settling Time to 0.1% 10 V Step, G = +2 ±15 70 ns

NOISE/HARMONIC PERFORMANCE

Total Harmonic Distortion (Differential) f = 1 MHz, R
Input Voltage Noise f = 10
Input Current Noise (+I
Input Current Noise (–I

) f = 10 kHz, G = +2 ±5, ±15 1.8 pA/√Hz

IN

) f = 10 kHz, G = +2 ±5, ±15 19 pA/√Hz

IN

kHz, G = +2 (Single Ended) ±5, ±15 1.85 nV/√Hz

Differential Gain Error NTSC, G = +2, R
Differential Phase Error NTSC, G = +2, R

= 100 Ω, V

LOAD

= 40 V p-p ±15 –68 dBc

OUT

= 25 Ω±15 0.05 %

LOAD

= 25 Ω±15 0.45 Degrees

LOAD

DC PERFORMANCE

Input Offset Voltage ±5512mV

±15 10 15 mV

T

MIN

to T

MAX

25 mV

Input Offset Voltage Drift 40 µV/°C
Differential Offset Voltage ±5, ±15 0.5 2 mV

T

MIN

to T

MAX

5mV

Differential Offset Voltage Drift 5 µV/°C
–Input Bias Current ±5, ±15 20 60 µA

T

MIN

to T

MAX

100 µA

+Input Bias Current ±5, ±15 2 5 µA

T

MIN

to T

MAX

5 µA

Differential Input Bias Current ±5, ±15 10 50 µA

T

Open-Loop Transresistance V

to T

T

MIN

OUT

MIN

MAX

= ±10 V, RL = 1 kΩ±5, ±15 0.7 2 MΩ

to T

MAX

0.6 MΩ

50 µA

INPUT CHARACTERISTICS

Differential Input Resistance +Input ±15 7 MΩ

–Input 15 Ω
Differential Input Capacitance ±15 1.4 pF
Input Common-Mode Voltage Range ±15 13.5 ±V

±5 3.5 ±V

Common-Mode Rejection Ratio T
Differential Common-Mode Rejection Ratio T

MIN

MIN

to T
to T

MAX

MAX

±5, ±15 56 60 dB
±5, ±15 80 100 dB

OUTPUT CHARACTERISTICS

Voltage Swing Single Ended, R

= 25 Ω±15 23 24.5 V p-p

LOAD

±5 2.2 3.6 V p-p

Continuous Output Current R

Differential, R

T

to T

MIN

LOAD

MAX

= 5 Ω±15 500 750 mA

= 50 Ω±15 46 49 V p-p

LOAD

±15 45 V p-p
±5 200 100 mA

Peak Output Current 10 µs Pulse, 1% Duty Cycle, R

= 15 Ω±15 1.0 A

L

Short Circuit Current Note 1 ±15 1.0 A

NOTES

1

See Power Considerations section.

Specifications subject to change without notice.

–2–

REV. B

AD816

RECEIVER AMPLIFIERS

(@ TA = +25ⴗC, VS = ⴞ15 V dc, RF = 1 k⍀ and R

= 500 ⍀ unless otherwise noted)

LOAD

AD816A

Model Conditions V

S

Min Typ Max Units

DYNAMIC PERFORMANCE

Small Signal Bandwidth (–3 dB) G = +2, R

G = +2, R

= 100 Ω±15 100 MHz

L

= 100 Ω±5 80 MHz

L

Bandwidth (0.1 dB) G = +2 ±15 30 MHz

G = +2 ±5 40 MHz

Slew Rate V
Settling Time to 0.1% V

= 4 V p-p ±15 180 V/µs

OUT

= 10 V p-p Step, G = +2 ±15 45 ns

OUT

NOISE/HARMONIC PERFORMANCE

Total Harmonic Distortion f = 1 MHz, R
Input Voltage Noise f = 10

kHz ±5, ±15 4 nV/√Hz

= 200 Ω±15 –68 dBc

LOAD

Current Noise f = 10 kHz ±5, ±15 2 pA/√Hz

Differential Gain Error NTSC, G = +2, R

= 150 Ω±15 0.04 0.08 %

LOAD

±5 0.05 0.1 %

Differential Phase Error NTSC, G = +2, R

= 150 Ω±15 0.03 0.1 Degrees

LOAD

±5 0.06 0.1 Degrees

DC PERFORMANCE

Input Offset Voltage ±5, ±15 7.5 15 mV

T

MIN

to T

MAX

15 mV

Offset Voltage Drift 20 µV/°C
Input Bias Current ±5, ±15 5 7 µA

T

MIN

to T

MAX

15 µA
Input Offset Current ±5, ±15 0.5 2 µA
Offset Current Drift 1 nA/°C

Open-Loop Gain V

= ±7.5 V, R

OUT

T

to T

MIN

MAX

= 150 Ω±15 3 6 V/mV

LOAD

±15 1 V/mV

INPUT CHARACTERISTICS

Input Resistance 300 kΩ

Input Capacitance 1.5 pF

Input Common-Mode Voltage Range ±15 +13 +14.3 V

±15 –12 –13.4 V
±5 +3.8 +4.3 V
±5 –2.7 –3.4 V

Common-Mode Rejection Ratio V

= ±5 V ±15 82 110 dB

CM

OUTPUT CHARACTERISTICS

Output Voltage Swing Single Ended, R

T

to T

MIN

MAX

Single Ended, R
T

to T

Output Current R

MIN

L

MAX

= 150 Ω±15 65 70 mA

= 150 Ω±15 25.2 25.5 V p-p

LOAD

±15 25.2 V p-p

= 150 Ω±5 6.2 6.4 V p-p

LOAD

±5 6.0 V p-p

Short Circuit Current ±15 105 mA

Specifications subject to change without notice.

COMMON CHARACTERISTICS

(@ TA = +25ⴗC, VS = ⴞ15 V dc, RF = 1 k⍀ and R
unless otherwise noted)

= 50 ⍀ (Driver), R

LOAD

= 500 ⍀ (Receiver)

LOAD

AD816A

Model Conditions V

S

Min Typ Max Units

MATCHING CHARACTERISTICS

Crosstalk:

Driver to Driver f = 1 MHz, V
Drivers to Receivers f = 1 MHz, V
Receiver to Receiver f = 1 MHz, VIN = 200 mV rms, R

= 200 mV rms, R

IN

= 200 mV rms, R

IN

= 100 Ω±15 –67 dB

LOAD

= 100 Ω±15 –64 dB

LOAD

= 500 Ω±15 –81 dB

LOAD

POWER SUPPLY

Operating Range ±5 ±18 V
Quiescent Current ±15 46 56 mA

Driver Supply Rejection Ratio T
Receiver Supply Rejection Ratio T

Specifications subject to change without notice.

to T

T

MIN

MIN

MIN

to T
to T

MAX

MAX

MAX

±15 59 mA
±15, ±5 –49 –66 dB
±15, ±5 –69 –75 dB

REV. B

–3–

AD816

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V Total

Internal Power Dissipation

2

1

Plastic (Y, YS and VR) . . 3.05 W (Observe Derating Curves)

Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . . ±V

S

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . ±6 V

Output Short Circuit Duration

. . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves

Storage Temperature Range

Y, YS, VR Package . . . . . . . . . . . . . . . . . . –65°C to +125°C

Operating Temperature Range

AD816A . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Lead Temperature Range (Soldering, 10 sec) . . . . . . . +300°C

NOTES

1

Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only. functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

2

Specification is for device in free air: 15-Lead Through Hole and Surface Mount:

θJA = 41°C/W.

PIN CONFIGURATION

Y-15 VR-15, YS-15

TOP VIEW

2345678

1

–V

–IN1 DRIVER

+IN1 DRIVER

OUT1 DRIVER

–IN1 RECEIVER

+IN1 RECEIVER

OUT1 RECEIVER

9

10

S

S

+V

–IN2 DRIVER

OUT2 DRIVER

11

12

14

13

15

NC

+IN2 DRIVER

–IN2 RECEIVER

+IN2 RECEIVER

OUT2 RECEIVER

OUT1 RECEIVER

TOP VIEW

2345678

1

–IN1 DRIVER

+IN1 DRIVER

OUT1 DRIVER

–IN1 RECEIVER

+IN1 RECEIVER

9

S

S

–V

+V

OUT2 DRIVER

11

12

14

10

13

–IN2 DRIVER

+IN2 DRIVER

–IN2 RECEIVER

+IN2 RECEIVER

OUT2 RECEIVER

15

NC

MAXIMUM POWER DISSIPATION

The maximum power that can be safely dissipated by the
AD816 is limited by the associated rise in junction temperature.
The maximum safe junction temperature for the plastic encap­sulated parts is determined by the glass transition temperature

of the plastic, about 150°C. Exceeding this limit temporarily

may cause a shift in parametric performance due to a change in
the stresses exerted on the die by the package. Exceeding a

junction temperature of 175°C for an extended period can result

in device failure.

The AD816 has thermal shutdown protection, which guarantees
that the maximum junction temperature of the die remains below a
safe level. However, shorting the output to ground or either power
supply for an indeterminate period will result in device failure.
To ensure proper operation, it is important to observe the derat­ing curves and refer to the section on power considerations.

It must also be noted that in high (noninverting) gain configura­tions (with low values of gain resistor), a high level of input
overdrive can result in a large input error current, which may
result in a significant power dissipation in the input stage. This
power must be included when computing the junction tempera­ture rise due to total internal power.

14
13
12

11
10

9
8
7

θ

= 418C/W

JA

(STILL AIR = 0FT/MIN)

6

NO HEAT SINK

5
4

3
2

MAXIMUM POWER DISSIPATION – Watts

1
0

–30 –20 –10 10 20 30 40 50 60 70 80

–50 90–40

AMBIENT TEMPERATURE – 8C

θ

= 168C/W

JA

SOLDERED DOWN TO
COPPER HEAT SINK AREA
(STILL AIR = 0FT/MIN)

AD816 AVR, AY

0

Figure 1. Plot of Maximum Power Dissipation vs. Tem­perature (Copper Heat Sink Area = 2 in.

TJ = 1508C

AD816 AVR, AY

2

)

ORDERING GUIDE

Package

Model Temperature Range Package Description Option

AD816AY –40°C to +85°C 15-Lead Through-Hole SIP with Staggered Leads and 90° Lead Form Y-15
AD816AYS –40°C to +85°C 15-Lead Through-Hole SIP with Staggered Leads and Straight Lead Form YS-15
AD816AVR –40°C to +85°C 15-Lead Surface Mount DDPAK VR-15

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.

WARNING!

Although the AD816 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.

–4–

ESD SENSITIVE DEVICE

REV. B

)

Typical Driver Performance Characteristics–AD816

30

25

20

15

10

5

SINGLE-ENDED OUTPUT VOLTAGE – Volts p-p

0

10 10k100 1k

LOAD RESISTANCE – (Differential – V) (Single-Ended – V/2

VS = 615V

VS = 65V

60

50

40

30

20

10

DIFFERENTIAL OUTPUT VOLTAGE – Volts p-p

0

Figure 2. Driver Output Voltage Swing vs. Load Resistance

100

INVERTING INPUT
CURRENT NOISE

10

NONINVERTING INPUT

VOLTAGE NOISE – nV/ Hz

1

10 100k100 1k 10k

CURRENT NOISE

INPUT VOLTAGE
NOISE

FREQUENCY – Hz

100

10

CURRENT NOISE – pA/ Hz

1

60

50

40

30

20

INPUT BIAS CURRENT – mA

10

0

–40 100–20 0 20 40 60 80

JUNCTION TEMPERATURE – 8C

–IB, VS = 615V

–IB, VS = 65V

+IB, VS = 65V, 615V

Figure 5. Driver Input Bias Current vs. Temperature

–40

VS = 615V
G = +10

–50

–60

–70

–80

–90

–100

TOTAL HARMONIC DISTORTION – dBc

–110

100 10M1k

= 40V p-p

V

OUT

RL = 50V
(DIFFERENTIAL)

RL = 200V
(DIFFERENTIAL)

10k 100k 1M

FREQUENCY – Hz

50V

100V

400V

Figure 3. Driver Input Current and Voltage Noise vs.
Frequency

0

–10

VS = 615V
G = +2

–20

R

= 100V

L

–30
–40
–50

PSRR – dB

–60
–70

–80
–90

–100

0.01

–PSRR

0.1
FREQUENCY – MHz

+PSRR

1 10 100 300

Figure 4. Driver Power Supply Rejection vs. Frequency

Figure 6. Driver Total Harmonic Distortion vs. Frequency

80

70

60

50

40

V

IN

30

COMMON-MODE REJECTION – dB

20

10

10k 100M100k

1kV

1kV

1kV

1kV

FREQUENCY – Hz

1M 10M

VS = 615V

V

OUT

Figure 7. Driver Common-Mode Rejection vs. Frequency

REV. B

–5–