ADA4891-1ARJZ Datasheet, PDF (1/20 Pages) Analog Devices – Low Cost CMOS, High Speed, Rail-to-Rail Amplifiers

FEATURES
Low cost
High speed and fast settling
−3 dB bandwidth: 240 MHz (G = +1)
Slew rate: 170 V/μs
Settling time to 0.1%: 28 ns
Video specifications (G = +2, RL = 150 Ω)
0.1 dB gain flatness: 25 MHz
Differential gain error: 0.05%
Differential phase error: 0.25°
Single-supply operation
Wide supply range: 2.7 V to 5.5 V
Output swings to within 50 mV of supply rails
Low distortion: 79 dBc SFDR @ 1 MHz
Linear output current: 150 mA @ −50 dBc
Low power of 4.4 mA per amplifier
APPLICATIONS
Imaging
Consumer video
Active filters
Coaxial cable drivers
Clock buffers
Photodiode preamp
Contact image sensor and buffers
GENERAL DESCRIPTION
The ADA4891-1 (single) and ADA4891-2 (dual) are CMOS, high
speed amplifiers that offer high performance at a low cost. The
amplifiers feature true single-supply capability, with an input
voltage range that extends 300 mV below the negative rail.
In spite of their low cost, the ADA4891 family provides high
performance and versatility. The rail-to-rail output stage enables
the output to swing within 50 mV of each rail, enabling maximum
dynamic range.
The ADA4891 family of amplifiers are ideal for imaging applications,
such as consumer video, CCD buffers, and contact image sensor
buffers. Low distortion and fast settling time also make them
ideal for active filter applications.
The ADA4891-1/ADA4891-2 are available in a wide variety of
packages. The ADA4891-1 is available in 8-lead SOIC and
5-lead SOT-23 packages. The ADA4891-2 is available in 8-lead
SOIC and 8-lead MSOP packages. The amplifiers are specified to
operate over the extended temperature range of −40°C to +125°C.
Rev. A
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Low Cost CMOS, High Speed,
Rail-to-Rail Amplifiers
ADA4891-1/ADA4891-2
CONNECTION DIAGRAMS
ADA4891-1
NC 1
–IN 2
+IN 3
–V_S 4
8 NC
7 +V_S
6 V_OUT
5 NC
NC = NO CONNECT
Figure 1. 8-Lead SOIC (R-8)
ADA4891-1
V_OUT 1
–V_S 2
+IN 3
5 +V_S
4 –IN
Figure 2. 5-Lead SOT-23 (RJ-5)
ADA4891-2
OUT1 1
–IN1 2
+IN1 3
–V_S 4
8 +V_S
7 OUT
6 –IN2
5 +IN2
NC = NO CONNECT
Figure 3. 8-Lead SOIC (R-8) and 8-Lead MSOP (RM-8)
1
0
–1
G = +1
G = +2
R_F = 0Ω
–2
R_F = 604Ω
–3
–4
G = +5
–5
R_F = 604Ω
–6
–7
–8
V_S = +5V
–9 R_L = 150Ω
V_OUT = 2V p-p
–10
0.1
1
10
100
1k
FREQUENCY (MHz)
Figure 4. Large Signal Frequency Response vs. Gain, VS = 5 V
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