2.7 V, 800 μA, 80 MHz
Rail-to-Rail I/O Amplifiers
AD8031/AD8032
FEATURES
CONNECTION DIAGRAMS
Low power
AD8032
NC
–IN
+IN
1
2
3
4
8
7
6
5
NC
+V
OUT1
–IN1
1
2
3
4
8
7
6
5
+V
S
–
+
Supply current 800 μA/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/μs slew rate
OUT2
–IN2
+IN2
S
+ –
+ –
OUT
NC
+IN1
–V
S
AD8031
–V
S
NC = NO CONNECT
Figure 1. 8-Lead PDIP (N) and
SOIC_N (R)
Figure 2. 8-Lead PDIP (N),
SOIC_N (R), and MSOP (RM)
125 ns settling time to 0.1%
AD8031
Rail-to-rail input and output
V
1
2
3
5
+V
S
OUT
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
–V
S
–
+
+IN
4
–IN
Figure 3. 5-Lead SOT-23 (RJ-5)
−62 dB @ 1 MHz, VO = 2 V p-p
−86 dB @ 100 kHz, VO = 4.6 V p-p
Output current: 15 mA
High grade option: VOS (maximum) = 1.5 mV
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 to high speed systems where component density
requires lower power dissipation. The AD8031/AD8032 are
available in 8-lead PDIP and 8-lead SOIC_N packages and
operate over the industrial temperature range of −40°C to
+85°C. The AD8031A is also available in the space-saving
5-lead SOT-23 package, and the AD8032A is available in an
8-lead MSOP package.
APPLICATIONS
High speed, battery-operated systems
High component density systems
Portable test instruments
A/D buffers
Active filters
High speed, set-and-demand amplifiers
V
= 4.85V p-p
V
= 4.65V p-p
IN
OUT
G = +1
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.
2µs/DIV
2µs/DIV
Figure 4. Input VIN
Figure 5. Output VOUT
+5V
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.
–
+
V
OUT
V
IN
1kΩ
1.7pF
+2.5V
Figure 6. Rail-to-Rail Performance at 100 kHz
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 ADCs.
Rev. C
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
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Tel: 781.329.4700
Fax: 781.461.3113
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©2006 Analog Devices, Inc. All rights reserved.
ADI [ ADI ]
