Low Cost CMOS, High Speed,
Rail-to-Rail Amplifiers
ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4
Data Sheet
FEATURES
CONNECTION DIAGRAMS
Qualified for automotive applications
ADA4891-1
High speed and fast settling
−3 dB bandwidth: 220 MHz (G = +1)
Slew rate: 170 V/μs
NC
–IN
+IN
1
2
3
4
8
7
6
5
NC
+V
S
OUT
NC
–V
S
Settling time to 0.1%: 28 ns
Video specifications (G = +2, RL = 150 Ω)
0.1 dB gain flatness: 25 MHz
NC = NO CONNECT
Figure 1. 8-Lead SOIC_N (R-8)
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 at 1 MHz
Linear output current: 125 mA at −40 dBc
Low power: 4.4 mA per amplifier
ADA4891-1
1
2
3
+V
S
OUT
–V
5
4
S
+IN
–IN
Figure 2. 5-Lead SOT-23 (RJ-5)
ADA4891-2
APPLICATIONS
OUT1
–IN1
1
2
3
4
8
7
6
5
+V
S
Automotive infotainment systems
Automotive driver assistance systems
Imaging
OUT2
–IN2
+IN2
+IN1
–V
S
Consumer video
NC = NO CONNECT
Active filters
Coaxial cable drivers
Clock buffers
Figure 3. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)
ADA4891-3
PD1
PD2
PD3
1
2
3
4
5
6
7
14 OUT2
13 –IN2
12 +IN2
Photodiode preamp
Contact image sensor and buffers
GENERAL DESCRIPTION
+V
11 –V
S
S
The ADA4891-1 (single), ADA4891-2 (dual), ADA4891-3 (triple),
and ADA4891-4 (quad) 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.
+IN1
–IN1
10 +IN3
9
8
–IN3
OUT1
OUT3
Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
In spite of their low cost, the ADA4891-1/ADA4891-2/ADA4891-3/
ADA4891-4 family provides high performance and versatility.
The rail-to-rail output stage enables the output to swing to within
50 mV of each rail, enabling maximum dynamic range.
ADA4891-4
1
2
3
4
5
6
7
14
13
OUT4
–IN4
OUT1
–IN1
12 +IN4
+IN1
The ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 family of
amplifiers is ideal for imaging applications, such as consumer
video, CCD buffers, and contact image sensor and buffers. Low
distortion and fast settling time also make them ideal for active
filter applications.
11
–V
S
+V
S
10
9
+IN3
–IN3
+IN2
–IN2
8
OUT3
OUT2
Figure 5. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)
The ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4 are avail-
able 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
ADA4891-3 and ADA4891-4 are available in 14-lead SOIC and
14-lead TSSOP packages. The amplifiers are specified to operate
over the extended temperature range of −40°C to +125°C.
Rev. F
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