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AD815ARB-24-AD815ARB-24-REEL-AD815AVR-AD815AY-AD815AYS
High Output Current Differential Driver
FUNCTIONAL BLOCK DIAGRAM
15-Lead Through-Hole SIP (Y) and Surface-Mount
DDPAK(VR)REV.B
High Output Current
Differential Driver
PRODUCT DESCRIPTIONThe AD815 consists of two high speed amplifiers capable of
supplying a minimum of 500 mA. They are typically configured
as a differential driver enabling an output signal of 40 V p-p on15 V supplies. This can be increased further with the use of a
FEATURES
Flexible Configuration
Differential Input and Output Driver
or Two Single-Ended Drivers
High Output Power
Power Package
26 dBm Differential Line Drive for ADSL Application
40 V p-p Differential Output Voltage, RL = 50V
500 mA Minimum Output Drive/Amp, RL = 5V
Thermally Enhanced SOIC
400 mA Minimum Output Drive/Amp, RL = 10V
Low Distortion
–66 dB @ 1MHz THD, RL = 200V, VOUT = 40 V p-p
0.05% and 0.458 Differential Gain and Phase, RL = 25V
(6 Back-Terminated Video Loads)
High Speed
120 MHz Bandwidth (–3 dB)
900 V/ms Differential Slew Rate
70 ns Settling Time to 0.1%
Thermal Shutdown
APPLICATIONS
ADSL, HDSL and VDSL Line Interface Driver
Coil or Transformer Driver
CRT Convergence and Astigmatism Adjustment
Video Distribution Amp
Twisted Pair Cable Driver
FREQUENCY – Hz
10010M1k
TOTAL HARMONIC DISTORTION – dBc
10k100k1M
–100Total Harmonic Distortion vs. Frequency
Subscriber Line Differential Driver
coupling transformer with a greater than 1:1 turns ratio. The
low harmonic distortion of –66dB @ 1MHz into 200W
combined with the wide bandwidth and high current drive make
the differential driver ideal for communication applications such
as subscriber line interfaces for ADSL, HDSL and VDSL.
The AD815 differential slew rate of 900 V/ms and high load drive
are suitable for fast dynamic control of coils or transformers,
and the video performance of 0.05% and 0.45° differential gain
and phase into a load of 25W enable up to 12 back-terminated
loads to be driven.
Three package styles are available, and all work over the
industrial temperature range (–40°C to +85°C). Maximum
output power is achieved with the power package available for
through-hole mounting (Y) and surface-mounting (VR). The
24-lead SOIC (RB) is capable of driving 26 dBm for full rate
ADSL with proper heat sinking.
AD815–SPECIFICATIONSDYNAMIC PERFORMANCE
NOISE/HARMONIC PERFORMANCE
DC PERFORMANCE
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
MATCHING CHARACTERISTICS
POWER SUPPLY
(@ TA = +258C, VS = 615 V dc, RFB = 1kV and RLOAD = 100V unless otherwise noted)
MAXIMUM POWER DISSIPATIONThe maximum power that can be safely dissipated by the AD815
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 AD815 has thermal shutdown protection, which guarantees
that the maximum junction temperature of the die remains below a
safe level, even when the output is shorted to ground. Shorting
the output to either power supply 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.
Plot of Maximum Power Dissipation vs. Temperature
ABSOLUTE MAXIMUM RATINGS1Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . –18 V Total
Internal Power Dissipation2
Plastic (Y and VR) . . 3.05 Watts (Observe Derating Curves)
Small Outline (RB) . . 2.4 Watts (Observe Derating Curves)
Input Voltage (Common Mode) . . . . . . . . . . . . . . . . . . . . –VS
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . –6 V
Output Short Circuit Duration
. . . . . . . . . . . . . . . . . . . . . . Observe Power Derating Curves
Can Only Short to Ground
Storage Temperature Range
Y, VR and RB Package . . . . . . . . . . . . . . . –65°C to +125°C
Operating Temperature Range
AD815A . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Lead Temperature Range (Soldering, 10 sec) . . . . . . . +300°C
NOTESStresses 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.Specification is for device in free air with 0 ft/min air flow: 15-Lead Through-Hole
and Surface Mount: qJA = 41°C/W; 24-Lead Surface Mount: qJA = 52°C/W.
PIN CONFIGURATION
24-Lead Thermally-Enhanced SOIC (RB-24)
ORDERING GUIDE
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD815 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
AD815
AD815–Typical Performance CharacteristicsFigure 4.Total Supply Current vs. Temperature
Figure 5.Total Supply Current vs. Supply Voltage
JUNCTION TEMPERATURE – 8C
INPUT BIAS CURRENT –
–10Figure 6.Input Bias Current vs. Temperature
SUPPLY VOLTAGE – 6Volts0205
COMMON-MODE VOLTAGE RANGE –
Volts15Figure 1.Input Common-Mode Voltage Range vs. Supply
Voltage
SUPPLY VOLTAGE – 6Volts
SINGLE-ENDED OUTPUT VOLTAGE – V p-p
DIFFERENTIAL OUTPUT VOLTAGE – V p-pFigure 2.Output Voltage Swing vs. Supply Voltage
LOAD RESISTANCE – (Differential – V) (Single-Ended – V/2)10k1001k
DIFFERENTIAL OUTPUT VOLTAGE – Volts p-p
SINGLE-ENDED OUTPUT VOLTAGE – Volts p-pFigure 3.Output Voltage Swing vs. Load Resistance
JUNCTION TEMPERATURE – 8C
INPUT OFFSET VOLTAGE – mV
–12Figure 7.Input Offset Voltage vs. Temperature
JUNCTION TEMPERATURE – 8C
SHORT CIRCUIT CURRENT – mA
500Figure 8.Short Circuit Current vs. Temperature
VOUT – Volts
RTI OFFSET – mVFigure 9.Gain Nonlinearity vs. Output Voltage
Figure 10.Thermal Nonlinearity vs. Output Current Drive
Figure 11.Closed-Loop Output Resistance vs. Frequency
Figure 12.Large Signal Frequency Response
AD815
FREQUENCY – Hz
10010100k1001k10k
VOLTAGE NOISE – nV
CURRENT NOISE – pA/Figure 13.Input Current and Voltage Noise vs. Frequency
FREQUENCY – Hz
10k100M100k
COMMON-MODE REJECTION – dB10MFigure 14.Common-Mode Rejection vs. Frequency
FREQUENCY – MHz
PSRR – dB10100300Figure 15.Power Supply Rejection vs. Frequency
FREQUENCY – Hz
100100M1k
TRANSIMPEDANCE – dB
10k100k1M10M
PHASE – Degrees
–250Figure 16.Open-Loop Transimpedance vs. Frequency
Figure 17.Total Harmonic Distortion vs. Frequency
Figure 18.Output Swing and Error vs. Settling Time
Figure 19.Slew Rate vs. Output Step Size
JUNCTION TEMPERATURE – 8C
PSRR – dB
–65Figure 20.PSRR vs. Temperature
JUNCTION TEMPERATURE – 8C
CMRR – dB
–71Figure 21.CMRR vs. Temperature
Figure 22.Open-Loop Transresistance vs. Temperature
JUNCTION TEMPERATURE – 8C–40100–20
OUTPUT SWING – Volts
020406080Figure 23.Single-Ended Output Swing vs. Temperature
JUNCTION TEMPERATURE – 8C
OUTPUT SWING – Volts
020406080Figure 24.Differential Output Swing vs. Temperature
AD815Figure 25.Differential Gain and Differential Phase
(per Amplifier)
FREQUENCY – MHz
CROSSTALK – dB10100300
–110Figure 26.Output-to-Output Crosstalk vs. Frequency
FREQUENCY – MHz
OUTPUT VOLTAGE – dB100Figure 27.–3dB Bandwidth vs. Frequency, G = +1
Figure 28.Bandwidth vs. Frequency, G = +2
FREQUENCY – MHz
NORMALIZED OUTPUT VOLTAGE – dB100–1Figure 29.–3dB Bandwidth vs. Frequency, G = +5
Figure 30.40 V p-p Differential Sine Wave, RL = 50W,
f = 100 kHz
