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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
L
= 50 @ 1 MHz
500 mA Continuous Current, R
L
= 5
1 A Peak Current, 1% Duty Cycle, R
L
= 15 for DMT
Low Distortion
–68 dB @ 1 MHz THD, R
L
= 100 , V
O
= 40 V p-p
High Speed
120 MHz Bandwidth (–3 dB)
1500 V/ s Differential Slew Rate, V
O
= 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, V
O
= 10 V p-p, R
L
= 200
High Speed
100 MHz Bandwidth (–3 dB)
180 V/ s Slew Rate
High Output Drive
70 mA Output Current Drive
500 mA Differential Driver and
Dual Low Noise (VF) Amplifiers
AD816*
FUNCTIONAL BLOCK DIAGRAM
RECEIVER B
15
14
13
12
11
B
10
9
+V
S
8
–V
S
7
6
5
4
3
2
1
NC
OUT2 RECEIVER
–IN2 RECEIVER
+IN2 RECEIVER
+IN2 DRIVER
–IN2 DRIVER
OUT2 DRIVER
+V
S
–V
S
OUT1 DRIVER
–IN1 DRIVER
+IN1 DRIVER
+IN1 RECEIVER
–IN1 RECEIVER
OUT1 RECEIVER
TAB IS
+V
S
SO
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
O
APPLICATIONS
ADSL, VDSL and HDSL Line Interface Driver and Receiver
CRT Convergence and Astigmatism Adjustment
Coil and Transformer Drivers
Composite Audio Amplifiers
B
LE
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 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/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).
TE
A
NC = NO CONNECT
RECEIVER A
DRIVER A & B
AD816
AD816–SPECIFICATIONS
DRIVER AMPLIFIERS
(@ T = +25 C, V =
A
S
15 V dc, R
F
= 1 k
and R
LOAD
= 50
unless otherwise noted)
V
S
±
15
±
5
±
15
±
15
±
15
±
15
±
5,
±
15
±
5,
±
15
±
5,
±
15
±
15
±
15
±
5
±
15
AD816A
Min
Typ
Max
Units
Model
DYNAMIC PERFORMANCE
Small Signal Bandwidth (–3 dB)
Conditions
G = +2, R
F
= 499
Ω,
V
IN
= 0.125 V rms,
R
L
= 100
Ω
G = +2, R
F
= 499
Ω,
V
IN
= 0.125 V rms,
R
L
= 100
Ω
G = +2, R
F
= 499
Ω,
V
IN
= 0.125 V rms,
R
L
= 100
Ω
V
OUT
= 10 V p-p, G = +5, R
L
= 100
Ω
10 V Step, G = +2
f = 1 MHz, R
LOAD
= 100
Ω,
V
OUT
= 40 V p-p
f = 10 kHz, G = +2 (Single Ended)
f = 10 kHz, G = +2
f = 10 kHz, G = +2
NTSC, G = +2, R
LOAD
= 25
Ω
NTSC, G = +2, R
LOAD
= 25
Ω
100
90
120
110
10
1500
70
–68
1.85
1.8
19
0.05
0.45
5
10
MHz
MHz
MHz
V/µs
ns
dBc
nV/√Hz
pA/√Hz
pA/√Hz
%
Degrees
12
15
25
2
5
60
100
5
5
50
50
mV
mV
mV
µV/°C
mV
mV
µV/°C
µA
µA
µA
µA
µA
µA
MΩ
MΩ
MΩ
Ω
pF
±
V
±
V
dB
dB
V p-p
V p-p
V p-p
V p-p
mA
mA
A
A
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 (+I
IN
)
Input Current Noise (–I
IN
)
Differential Gain Error
Differential Phase Error
DC PERFORMANCE
Input Offset Voltage
1400
T
MIN
to T
MAX
Input Offset Voltage Drift
Differential Offset Voltage
Differential Offset Voltage Drift
–Input Bias Current
+Input Bias Current
Differential Input Bias Current
Open-Loop Transresistance
T
MIN
to T
MAX
T
MIN
to T
MAX
LE
±
15
±
15
±
5
±
15
±
15
±
15
±
5
±
15
±
15
T
MIN
to T
MAX
SO
T
MIN
to T
MAX
V
OUT
=
±
10 V, R
L
= 1 kΩ
T
MIN
to T
MAX
+Input
–Input
T
MIN
to T
MAX
T
MIN
to T
MAX
Single Ended, R
LOAD
= 25
Ω
Differential, R
LOAD
= 50
Ω
T
MIN
to T
MAX
R
LOAD
= 5
Ω
10
µs
Pulse, 1% Duty Cycle, R
L
= 15
Ω
Note 1
INPUT CHARACTERISTICS
Differential Input Resistance
Differential Input Capacitance
Input Common-Mode Voltage Range
Continuous Output Current
Peak Output Current
Short Circuit Current
O
Common-Mode Rejection Ratio
Differential Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
Voltage Swing
B
NOTES
1
See Power Considerations section.
Specifications subject to change without notice.
–2–
TE
±
5,
±
15
±
5,
±
15
±
5,
±
15
±
5,
±
15
±
5,
±
15
0.7
0.6
40
0.5
5
20
2
10
2
±
15
±
15
±
5
±
5,
±
15
±
5,
±
15
56
80
23
2.2
46
45
500
200
7
15
1.4
13.5
3.5
60
100
24.5
3.6
49
750
100
1.0
1.0
REV. B
AD816
RECEIVER AMPLIFIERS
(@ T = +25 C, V
A
S
=
15 V dc, R
F
= 1 k
and R
LOAD
= 500
V
S
unless otherwise noted)
Min
AD816A
Typ Max
Units
Model
Conditions
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 Offset Voltage
G = +2, R
L
= 100
Ω
G = +2, R
L
= 100
Ω
G = +2
G = +2
V
OUT
= 4 V p-p
V
OUT
= 10 V p-p Step, G = +2
f = 1 MHz, R
LOAD
= 200
Ω
f = 10 kHz
f = 10 kHz
NTSC, G = +2, R
LOAD
= 150
Ω
NTSC, G = +2, R
LOAD
= 150
Ω
±
15
±
5
±
15
±
5
±
15
±
15
±
15
±
5,
±
15
±
5,
±
15
±
15
±
5
±
15
±
5
100
80
30
40
180
45
–68
4
2
0.04
0.05
0.03
0.06
7.5
MHz
MHz
MHz
MHz
V/µs
ns
dBc
nV/√Hz
pA/√Hz
%
%
Degrees
Degrees
mV
mV
µV/°C
µA
µA
µA
nA/°C
V/mV
V/mV
kΩ
pF
V
V
V
V
dB
V p-p
V p-p
V p-p
V p-p
mA
mA
TE
±
5,
±
15
±
5,
±
15
±
5,
±
15
3
1
20
5
±
15
±
15
0.5
1
6
±
15
±
15
±
5
±
5
±
15
±
15
±
15
±
5
±
5
±
15
±
15
+13
–12
+3.8
–2.7
82
25.2
25.2
6.2
6.0
65
300
1.5
+14.3
–13.4
+4.3
–3.4
110
25.5
6.4
70
105
0.08
0.1
0.1
0.1
15
15
7
15
2
T
MIN
to T
MAX
Offset Voltage Drift
Input Bias Current
Input Offset Current
Offset Current Drift
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
T
MIN
to T
MAX
V
OUT
=
±
7.5 V, R
LOAD
= 150
Ω
T
MIN
to T
MAX
Common-Mode Rejection Ratio
OUTPUT CHARACTERISTICS
Output Voltage Swing
Output Current
Short Circuit Current
Specifications subject to change without notice.
O
B
SO
V
CM
=
±
5 V
Single Ended, R
LOAD
= 150
Ω
T
MIN
to T
MAX
Single Ended, R
LOAD
= 150
Ω
T
MIN
to T
MAX
R
L
= 150
Ω
COMMON CHARACTERISTICS
Model
MATCHING CHARACTERISTICS
Crosstalk:
Driver to Driver
Drivers to Receivers
Receiver to Receiver
POWER SUPPLY
Operating Range
Quiescent Current
Driver Supply Rejection Ratio
Receiver Supply Rejection Ratio
Specifications subject to change without notice.
(@ T
A
= +25 C, V
S
= 15 V dc, R
F
= 1 k
unless otherwise noted)
LE
V
S
–3–
and R
LOAD
= 50
(Driver), R
LOAD
= 500
AD816A
Min Typ Max
(Receiver)
Conditions
Units
f = 1 MHz, V
IN
= 200 mV rms, R
LOAD
= 100
Ω ±
15
f = 1 MHz, V
IN
= 200 mV rms, R
LOAD
= 100
Ω ±
15
f = 1 MHz, V
IN
= 200 mV rms, R
LOAD
= 500
Ω ±
15
±
5
–67
–64
–81
±
18
56
59
dB
dB
dB
V
mA
mA
dB
dB
T
MIN
to T
MAX
T
MIN
to T
MAX
T
MIN
to T
MAX
±
15
±
15
±
15,
±
5
±
15,
±
5
46
–49
–69
–66
–75
REV. B
AD816
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
18 V Total
Internal Power Dissipation
2
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:
θ
JA
= 41°C/W.
ABSOLUTE MAXIMUM RATINGS
1
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 encap-
sulated 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 derat-
ing curves and refer to the section on power considerations.
It must also be noted that in high (noninverting) gain configura-
tions (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 tempera-
ture rise due to total internal power.
14
T
J
= 150 C
PIN CONFIGURATION
Y-15
VR-15, YS-15
MAXIMUM POWER DISSIPATION – Watts
LE
13
12
11
10
9
8
6
5
4
3
2
1
7
TOP VIEW
TOP VIEW
SO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OUT1 RECEIVER
–IN1 RECEIVER
+IN1 RECEIVER
+IN1 DRIVER
–IN1 DRIVER
OUT1 DRIVER
–V
S
+V
S
OUT2 DRIVER
–IN2 DRIVER
+IN2 DRIVER
+IN2 RECEIVER
–IN2 RECEIVER
OUT2 RECEIVER
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OUT1 RECEIVER
–IN1 RECEIVER
+IN1 RECEIVER
+IN1 DRIVER
–IN1 DRIVER
OUT1 DRIVER
–V
S
+V
S
OUT2 DRIVER
–IN2 DRIVER
+IN2 DRIVER
+IN2 RECEIVER
–IN2 RECEIVER
OUT2 RECEIVER
NC
TE
AD816 AVR, AY
θ
JA
= 16 C/W
SOLDERED DOWN TO
COPPER HEAT SINK AREA
(STILL AIR = 0FT/MIN)
θ
JA
= 41 C/W
(STILL AIR = 0FT/MIN)
NO HEAT SINK
AD816 AVR, AY
0
–50 –40 –30 –20 –10 0 10 20 30 40 50 60
AMBIENT TEMPERATURE – C
70 80
90
B
Figure 1. Plot of Maximum Power Dissipation vs. Tem-
perature (Copper Heat Sink Area = 2 in.
2
)
O
ORDERING GUIDE
Package
Option
Y-15
YS-15
VR-15
Model
Temperature Range
Package Description
15-Lead Through-Hole SIP with Staggered Leads and 90° Lead Form
15-Lead Through-Hole SIP with Staggered Leads and Straight Lead Form
15-Lead Surface Mount DDPAK
AD816AY
AD816AYS
AD816AVR
–40°C to +85°C
–40°C to +85°C
–40°C to +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.
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.
WARNING!
ESD SENSITIVE DEVICE
–4–
REV. B
京公网安备 11010802033920号
EEWORLD
