AD816_15 Datasheet, PDF (1/16 Pages) Analog Devices – 500 mA Differential Driver and Dual Low Noise (VF) Amplifiers

a
500 mA Differential Driver and
Dual Low Noise (VF) Amplifiers
AD816*
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Flexible Configuration
Two Low Noise Voltage Feedback Amplifiers with
15
NC
High Current Drive, Ideal for ADSL Receivers or
14
OUT2 RECEIVER
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
TAB IS
+V_S
13
12
11
B
10
–IN2 RECEIVER
+IN2 RECEIVER
+IN2 DRIVER
–IN2 DRIVER
Impedance Loads such as CRT Coils
Thermal Overload Protection
CURRENT FEEDBACK AMPLIFIERS/DRIVERS
High Output Drive
26 dBm Differential Line Drive for ADSL Transmitters
E 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
T _{–68 dB @ 1 MHz THD, RL = 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
E _{70 ns Settling Time to 0.1%}
VOLTAGE FEEDBACK AMPLIFIERS/RECEIVERS
High Input Performance
L _{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 ⍀
O High Speed
100 MHz Bandwidth (–3 dB)
180 V/␮s Slew Rate
High Output Drive
S ^{70 mA Output Current Drive}
APPLICATIONS
ADSL, VDSL and HDSL Line Interface Driver and Receiver
CRT Convergence and Astigmatism Adjustment
B _{Coil and Transformer Drivers}
Composite Audio Amplifiers
PRODUCT DESCRIPTION
O ^{The AD816 consists of two high current drive and two low}
9
+V_{S 8}
–V_S 7
6
A
5
4
3
2
1
NC = NO CONNECT
OUT2 DRIVER
+V_S
–V_S
OUT1 DRIVER
–IN1 DRIVER
+IN1 DRIVER
+IN1 RECEIVER
–IN1 RECEIVER
OUT1 RECEIVER
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).
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
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© Analog Devices, Inc., 1999