Single-Supply, High Speed,
Triple Op Amp with Charge Pump
ADA4858-3
FEATURES
CONNECTION DIAGRAM
ADA4858-3
Integrated charge pump
Supply range: 3 V to 5.5 V
Output range: −3.3 V to −1.8 V
50 mA maximum output current for external use at −3 V
High speed amplifiers
−3 dB bandwidth: 600 MHz
Slew rate: 600 V/μs
16 15 14 13
12
+IN2
+V
1
2
3
4
S
11 –IN2
C1_a
C1_b
CPO
CHARGE
PUMP
10 OUT2
0.1 dB flatness: 85 MHz
9
PD
0.1% settling time: 18 ns
Low power
5
6
7
8
Total quiescent current: 42 mA
Power-down feature
NOTES
High input common-mode voltage range
−1.8 V to +3.8 V at +5 V supply
Current feedback architecture
Differential gain error: 0.01%
Differential phase error: 0.02°
Available in 16-lead LFCSP
1. NC = NO CONNECT.
2. EXPOSED PAD, CONNECT TO GROUND.
Figure 1.
APPLICATIONS
Professional video
Consumer video
Imaging
Active filters
This triple operational amplifier is designed to operate on
supply voltages of 3.3 V to 5 V, using only 42 mA of total
quiescent current, including the charge pump. To further
reduce the power consumption, it is equipped with a power-
down feature that lowers the total supply current to as low as
2.5 mA when the amplifier is not being used. Even in power-
down mode, the charge pump can be used to power external
components. The maximum output current for external use is
50 mA at −3 V. The amplifier also has a wide input common-
mode voltage range that extends from 1.8 V below ground to
1.2 V below the positive rail at a 5 V supply.
GENERAL DESCRIPTION
The ADA4858-3 (triple) is a single-supply, high speed current
feedback amplifier with an integrated charge pump that eliminates
the need for negative supplies in order to output negative voltages
or output a 0 V level for video applications. The 600 MHz
−3 dB bandwidth and 600 V/μs slew rate make this amplifier
well suited for many high speed applications. In addition, its
0.1 dB flatness out to 85 MHz at G = 2, along with its differential
gain and phase errors of 0.01% and 0.02° into a 150 Ω load,
make it well suited for professional and consumer video
applications.
The ADA4858-3 is available in a 16-lead LFCSP, and it is designed
to work over the extended industrial temperature range of
−40°C to +105°C.
Rev. 0
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2008 Analog Devices, Inc. All rights reserved.