Analog Devices AD816AYS, AD816AYR, AD816AY Datasheet
REV. A
Information furnished by Analog Devices is believed to be accurate and
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a
500 mA Differential Driver and
Dual Low Noise (VF) Amplifiers
AD816
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 ⍀, VO = 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, 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 and HDSL Line Interface Driver and Receiver
CRT Convergence and Astigmatism Adjustment
Coil and Transformer Drivers
Composite Audio Amplifiers
FUNCTIONAL BLOCK DIAGRAM
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
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 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: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
AD816–SPECIFICATIONS
DRIVER AMPLIFIERS
AD816A
Model Conditions V
S
Min Typ Max Units
DYNAMIC PERFORMANCE
Small Signal Bandwidth (–3 dB) G = +2, R
F
= 499 Ω, V
IN
= 0.125 V rms,
R
L
= 100 Ω±15 100 120 MHz
G = +2, R
F
= 499 Ω, V
IN
= 0.125 V rms,
R
L
= 100 Ω±5 90 110 MHz
Bandwidth (0.1 dB) G = +2, R
F
= 499 Ω, V
IN
= 0.125 V rms,
R
L
= 100 Ω±15 10 MHz
Differential Slew Rate V
OUT
= 10 V p-p, G = +5, R
L
= 100 Ω±15 1400 1500 V/µs
Settling Time to 0.1% 10 V Step, G = +2 ±15 70 ns
NOISE/HARMONIC PERFORMANCE
Total Harmonic Distortion (Differential) f = 1 MHz, R
LOAD
= 100 Ω, V
OUT
= 40 V p-p ±15 –68 dBc
Input Voltage Noise f = 10
kHz, G = +2 (Single Ended) ±5, ±15 1.85 nV/√Hz
Input Current Noise (+I
IN
) f = 10 kHz, G = +2 ±5, ±15 1.8 pA/√Hz
Input Current Noise (–I
IN
) f = 10 kHz, G = +2 ±5, ±15 19 pA/√Hz
Differential Gain Error NTSC, G = +2, R
LOAD
= 25 Ω±15 0.05 %
Differential Phase Error NTSC, G = +2, R
LOAD
= 25 Ω±15 0.45 Degrees
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
MIN
to T
MAX
50 µA
Open-Loop Transresistance V
OUT
= ±10 V, RL = 100 Ω±5, ±15 0.7 2 MΩ
T
MIN
to T
MAX
0.6 MΩ
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
±53.5±V
Common-Mode Rejection Ratio T
MIN
to T
MAX
±5, ±15 56 60 dB
Differential Common-Mode Rejection Ratio T
MIN
to T
MAX
±5, ±15 80 100 dB
OUTPUT CHARACTERISTICS
Voltage Swing Single Ended, R
LOAD
= 25 Ω±15 23 24.5 V p-p
±5 2.2 3.6 V p-p
Differential, R
LOAD
= 50 Ω±15 46 49 V p-p
T
MIN
to T
MAX
±15 45 V p-p
Continuous Output Current R
LOAD
= 5 Ω±15 500 750 mA
±5 200 100 mA
Peak Output Current 10 µs Pulse, 1% Duty Cycle, R
L
= 15 Ω±15 1.0 A
Short Circuit Current Note 1 ±15 1.0 A
NOTES
1
See Power Considerations section.
Specifications subject to change without notice.
REV. A–2–
(@ TA = +25ⴗC, VS = ⴞ15 V dc, RF = 1 k⍀ and R
LOAD
= 50 ⍀ unless otherwise noted)
RECEIVER AMPLIFIERS
AD816A
Model Conditions V
S
Min Typ Max Units
DYNAMIC PERFORMANCE
Small Signal Bandwidth (–3 dB) G = +2, R
L
= 100 Ω±15 100 MHz
G = +2, R
L
= 100 Ω±5 80 MHz
Bandwidth (0.1 dB) G = +2 ±15 30 MHz
G = +2 ±5 40 MHz
Slew Rate V
OUT
= 4 V p-p ±15 180 V/µs
Settling Time to 0.1% V
OUT
= 10 V p-p Step, G = +2 ±15 45 ns
NOISE/HARMONIC PERFORMANCE
Total Harmonic Distortion f = 1 MHz, R
LOAD
= 200 Ω±15 –68 dBc
Input Voltage Noise f = 10
kHz ±5, ±15 4 nV/√Hz
Current Noise f = 10 kHz ±5, ±15 2 pA/√Hz
Differential Gain Error NTSC, G = +2, R
LOAD
= 150 Ω±15 0.04 0.08 %
±5 0.05 0.1 %
Differential Phase Error NTSC, G = +2, R
LOAD
= 150 Ω±15 0.03 0.1 Degrees
±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
OUT
= ±7.5 V, R
LOAD
= 150 Ω±15 3 6 V/mV
T
MIN
to T
MAX
±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
CM
= ±5 V ±15 82 110 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing Single Ended, R
LOAD
= 150 Ω±15 25.2 25.5 V p-p
T
MIN
to T
MAX
±15 25.2 V p-p
Single Ended, R
LOAD
= 150 Ω±5 6.2 6.4 V p-p
T
MIN
to T
MAX
±5 6.0 V p-p
Output Current R
L
= 150 Ω±15 65 70 mA
Short Circuit Current ±15 105 mA
Specifications subject to change without notice.
(@ TA = +25ⴗC, VS = ⴞ15 V dc, RF = 1 k⍀ and R
LOAD
= 500 ⍀ unless otherwise noted)
REV. A
–3–
COMMON CHARACTERISTICS
AD816A
Model Conditions V
S
Min Typ Max Units
MATCHING CHARACTERISTICS
Crosstalk:
Driver to Driver f = 1 MHz, V
IN
= 200 mV rms, R
LOAD
= 100 Ω±15 –67 dB
Drivers to Receivers f = 1 MHz, V
IN
= 200 mV rms, R
LOAD
= 100 Ω±15 –64 dB
Receiver to Receiver f = 1 MHz, VIN = 200 mV rms, R
LOAD
= 500 Ω±15 –81 dB
POWER SUPPLY
Operating Range ±5 ±18 V
Quiescent Current ±15 46 56 mA
T
MIN
to T
MAX
±15 59 mA
Driver Supply Rejection Ratio T
MIN
to T
MAX
±15, ±5 –49 –66 dB
Receiver Supply Rejection Ratio T
MIN
to T
MAX
±15, ±5 –69 –75 dB
Specifications subject to change without notice.
(@ TA = +25ⴗC, VS = ⴞ15 V dc, RF = 1 k⍀ and R
LOAD
= 50 ⍀ (Driver), R
LOAD
= 500 ⍀ (Receiver)
unless otherwise noted)
AD816
AD816
REV. A–4–
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.
AMBIENT TEMPERATURE – 8C
14
7
4
–50 90–40
MAXIMUM POWER DISSIPATION – Watts
–30 –20 –10 10 20 30 40 50 60 70 80
13
8
6
5
11
9
12
10
0
TJ = 1508C
3
2
1
0
AD816 AVR, AY
θ
JA
= 418C/W
(STILL AIR = 0FT/MIN)
NO HEAT SINK
θ
JA
= 168C/W
SOLDERED DOWN TO
COPPER HEAT SINK AREA
(STILL AIR = 0FT/MIN)
AD816 AVR, AY
Figure 1. Plot of Maximum Power Dissipation vs. Temperature (Copper Heat Sink Area = 2 in.
2
)
ABSOLUTE MAXIMUM RATINGS
1
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:
θJA = 41°C/W.
PIN CONFIGURATION
Y-15 VR-15, YS-15
TOP VIEW
10
12
13
14
15
11
1
2345678
9
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
OUT2 DRIVER
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
OUT2 DRIVER
TOP VIEW
10
12
13
14
15
11
1
2345678
9
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.
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
WARNING!
ESD SENSITIVE DEVICE
LOAD RESISTANCE – (Differential – V) (Single-Ended – V/2
)
30
25
0
10 10k100 1k
20
15
10
5
DIFFERENTIAL OUTPUT VOLTAGE – Volts p-p
60
50
0
40
30
20
10
VS = 615V
VS = 65V
SINGLE-ENDED OUTPUT VOLTAGE – Volts p-p
Figure 2. Driver Output Voltage Swing vs. Load Resistance
FREQUENCY – Hz
100
10
1
10 100k100 1k 10k
VOLTAGE NOISE – nV/ Hz
100
10
1
CURRENT NOISE – pA/ Hz
INVERTING INPUT
CURRENT NOISE
NONINVERTING INPUT
CURRENT NOISE
INPUT VOLTAGE
NOISE
Figure 3. Driver Input Current and Voltage Noise vs.
Frequency
FREQUENCY – MHz
0.01
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0.1
PSRR – dB
1 10 100 300
+PSRR
–PSRR
VS = 615V
G = +2
R
L
= 100V
Figure 4. Driver Power Supply Rejection vs. Frequency
–5–
REV. A
Typical Driver Performance Characteristics–AD816
JUNCTION TEMPERATURE – 8C
–40 100–200 2040 6080
60
0
40
30
20
10
50
INPUT BIAS CURRENT – mA
–IB, VS = 615V
–IB, VS = 65V
+IB, VS = 65V, 615V
Figure 5. Driver Input Bias Current vs. Temperature
FREQUENCY – Hz
–40
–50
–110
100 10M1k
TOTAL HARMONIC DISTORTION – dBc
10k 100k 1M
–60
–70
–80
–90
–100
VS = 615V
G = +10
V
OUT
= 40V p-p
RL = 50V
(DIFFERENTIAL)
RL = 200V
(DIFFERENTIAL)
50V
100V
400V
Figure 6. Driver Total Harmonic Distortion vs. Frequency
FREQUENCY – Hz
80
10
10k 100M100k
COMMON-MODE REJECTION – dB
1M 10M
70
60
50
40
30
20
VS = 615V
1kV
V
OUT
V
IN
1kV
1kV
1kV
Figure 7. Driver Common-Mode Rejection vs. Frequency
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