AD846_15 Datasheet, PDF (1/12 Pages) Analog Devices – 450 V/ms, Precision, Current-Feedback Op Amp

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450 V/␮s, Precision,
Current-Feedback Op Amp
AD846
FEATURES
CONNECTION DIAGRAM
AC PERFORMANCE
Plastic Mini-DIP (N) Package
Small Signal Bandwidth: 80 MHz (A_V = –1)
Slew Rate: 450 V/␮s
and
Cerdip (Q) Package
Full Power Bandwidth: 6.8 MHz at 20 V p-p,
R_L = 500 ⍀
Fast Settling: for 10 V Step: 110 ns to 0.01%,
OBSOLETE 80 ns to 0.1%
Differential Gain: <0.01% @ 4.4 MHz
Differential Phase: <0.028؇ @ 4.4 MHz
Total Harmonic Distortion (THD): 0.0005% @ 100 kHz
Open-Loop Transimpedance: 200 M⍀
Input Voltage Noise: 2 nV/√Hz
DC PERFORMANCE
Input Offset Voltage: 75 ␮V max (B Grade)
Input Offset Drift: 3.5 ␮V/؇C max (B Grade)
Quiescent Supply Current: 6.5 mA max
APPLICATIONS
High Speed DAC Buffers
Multiflash ADC Error Amplifiers
Flash ADC Buffers
Coaxial Cable Drivers
High Performance Audio Circuitry
Other advantages include: low input errors and high open-loop
transresistance (200 MΩ) into a 500 Ω load, ensuring true
12-bit dc accuracy for closed-loop gains from –1 to gains greater
than –100. This combination of ac and dc performance makes
Available in Plastic Mini-DIP, Hermetic Cerdip, and
the AD846 an excellent choice for buffering precision high
Hermetic Metal Can Packages
speed DACs and flash ADCs.
MIL-STD-883B Parts Available
The AD846 is available in three performance grades. The
AD846A and AD846B are rated over the industrial temperature
range of –40°C to +85°C. The AD846S is rated over the full
PRODUCT DESCRIPTION
The AD846 is a monolithic, very high speed operational ampli-
military temperature range of –55°C to +125°C and is available
processed to MIL-STD-883B, Rev C.
fier offering high performance. Although technically classed as a Extended reliability PLUS screening is available specified over
current-feedback or transimpedance amplifier, it may be used in _{the commercial temperature range. PLUS screening includes}
much the same way as traditional op amps while providing sig- 168 hour burn-in as well as other environmental and physical
nificant performance benefits. Employing Analog Devices’ junc- tests. The AD846 is available in two types of 8-pin package:
tion isolated complementary bipolar (CB) process, the AD846
plastic mini-DIP and hermetic cerdip. “A” and “S” grade chips
achieves true “12-bit” (0.01%) precision on critical ac and dc
are also available.
parameters, a level of performance unmatched by amplifiers
fabricated using either the dielectrically isolated (DI) or other
PRODUCT HIGHLIGHTS
bipolar processes.
1. The AD846 achieves settling times of 110 ns to 0.01% for
The AD846 offers significant advantages over conventional high
speed operational amplifiers. It maintains a nearly constant
gains of –1 to –10, with a 450 V/µs slew rate, while con-
suming only 5 mA of supply current.
bandwidth and settling time to 0.01% over a wide range of
2. For closed-loop gains of –1 to –100, the high speed perfor-
closed-loop gains. This makes the AD846 ideal for amplifying
mance of the AD846 is achieved without sacrificing full
the residue in multiple-pass analog-to-digital converters.
12-bit dc precision.
3. The AD846 is well suited to line driver and video buffer
applications where the properties of low distortion and high
slew rate are required.
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.
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