a
FEATURES
Low Power
Supply Current 800 A/Amplifier
Fully Specified at +2.7 V, +5 V and 5 V Supplies
High Speed and Fast Settling on +5 V
80 MHz –3 dB Bandwidth (G = +1)
30 V/ s Slew Rate
125 ns Settling Time to 0.1%
Rail-to-Rail Input and Output
No Phase Reversal with Input 0.5 V Beyond Supplies
Input CMVR Extends Beyond Rails by 200 mV
Output Swing to Within 20 mV of Either Rail
Low Distortion
–62 dB @ 1 MHz, V
O
= 2 V p-p
–86 dB @ 100 kHz, V
O
= 4.6 V p-p
Output Current: 15 mA
High Grade Option
V
OS
(max) = 1.5 mV
APPLICATIONS
High-Speed Battery-Operated Systems
High Component Density Systems
Portable Test Instruments
A/D Buffer
Active Filters
High-Speed Set-and-Demand Amplifier
NC 1
–IN 2
+IN 3
–V
S
4
2.7 V, 800 A, 80 MHz
Rail-to-Rail I/O Amplifiers
AD8031/AD8032
CONNECTION DIAGRAMS
8-Lead Plastic DIP (N)
and SOIC (R) Packages
8-Lead Plastic DIP (N),
SOIC (R) and SOIC (RM)
Packages
OUT1 1
–IN1 2
+IN1 3
–V
S
4
8 +V
S
7 OUT2
6 –IN2
AD8031
8 NC
7 +V
S
6 OUT
5 NC
AD8032
5 +IN2
NC = NO CONNECT
5-Lead Plastic Surface Mount Package
SOT-23-5 (RT-5)
V
OUT 1
–V
S 2
+IN
3
(Not to Scale)
4
AD8031
5
+V
S
–IN
to high-speed systems where component density requires lower
power dissipation. The AD8031/AD8032 are available in 8-lead
plastic DIP and SOIC packages and will operate over the indus-
trial temperature range of –40°C to +85°C. The AD8031A is also
available in the space-saving 5-lead SOT-23-5 package and the
AD8032A is available in AN 8-lead
µSOIC
package.
GENERAL DESCRIPTION
The AD8031 (single) and AD8032 (dual) single supply voltage
feedback amplifiers feature high-speed performance with 80 MHz
of small signal bandwidth, 30 V/µs slew rate and 125 ns settling
time. This performance is possible while consuming less than
4.0 mW of power from a single +5 V supply. These features
increase the operation time of high speed battery-powered
systems without compromising dynamic performance.
The products have true single supply capability with rail-to-rail
input and output characteristics and are specified for +2.7 V,
+5 V and
±5
V supplies. The input voltage range can extend to
500 mV beyond each rail. The output voltage swings to within
20 mV of each rail providing the maximum output dynamic range.
The AD8031/AD8032 also offer excellent signal quality for only
800
µA
of supply current per amplifier; THD is –62 dBc with a
2 V p-p, 1 MHz output signal and –86 dBc for a 100 kHz, 4.6 V p-p
signal on +5 V supply. The low distortion and fast settling time
make them ideal as buffers to single supply, A-to-D converters.
Operating on supplies from +2.7 V to +12 V and dual supplies up to
±6
V, the AD8031/AD8032 are ideal for a wide range of applications,
from battery-operated systems with large bandwidth requirements
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.
1V/Div
1V/Div
2 s/Div
2 s/Div
Input V
IN
+5V
Output V
OUT
V
OUT
V
IN
1k
1.7pF
+2.5V
Circuit Diagram
Figure 1. Rail-to-Rail Performance at 100 kHz
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
AD [ ANALOG DEVICES ]
