Low Cost, High Speed,
Rail-to-Rail Output Op Amps
ADA4851-1/ADA4851-2/ADA4851-4
FEATURES
PIN CONFIGURATIONS
High speed
130 MHz, −3 dB bandwidth
375 V/μs slew rate
55 ns settling time to 0.1%
Excellent video specifications
0.1 dB flatness: 11 MHz
ADA4851-1
V
1
2
3
6
5
4
+V
S
OUT
–V
POWER DOWN
–IN
S
+IN
TOP VIEW (Not to Scale)
Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)
Differential gain: 0.08%
ADA4851-2
Differential phase: 0.09°
OUT1
–IN1
+IN1
1
2
3
4
8
7
6
5
+V
S
Fully specified at +3 V, +5 V, and 5 V supplies
Rail-to-rail output
OUT
–IN2
+IN2
Output swings to within 60 mV of either rail
Low voltage offset: 0.6 mV
Wide supply range: 3 V to 10 V
Low power: 2.5 mA/amplifier
Power-down mode
–V
S
TOP VIEW
(Not to Scale)
Figure 2. ADA4851-2, 8-Lead MSOP (RM-8)
1
2
3
4
5
6
7
14
13
12
11
V
1
V
4
Available in space-saving packages
SOT-23-6, TSSOP-14, and MSOP-8
OUT
OUT
–IN 4
+IN 4
–IN 1
+IN 1
APPLICATIONS
ADA4851-4
TOP VIEW
(Not to Scale)
–V
S
+V
S
Consumer video
Professional video
Video switchers
Active filters
10 +IN 3
+IN 2
–IN 2
9
8
–IN 3
V
3
V
2
OUT
OUT
Figure 3. ADA4851-4, 14-Lead TSSOP (RU-14)
GENERAL DESCRIPTION
The ADA4851-1 (single)/ADA4851-2 (dual)/ADA4851-4
(quad) are low cost, high speed, voltage feedback rail-to-rail
output op amps. Despite their low price, these parts provide
excellent overall performance and versatility. The 130 MHz,
−3 dB bandwidth and high slew rate make these amplifiers well-
suited for many general-purpose, high speed applications.
The ADA4851 family is designed to work over the extended
temperature range (−40°C to +125°C).
4
G = +1
V
R
C
= 5V
= 1kΩ
= 5pF
3
2
S
L
L
1
0
The ADA4851 family is designed to operate at supply voltages
as low as +3 V and up to 5 V. These parts provide true single-
supply capability, allowing input signals to extend 200 mV
below the negative rail and to within 2.2 V of the positive rail.
On the output, the amplifiers can swing within 60 mV of either
supply rail.
–1
–2
–3
–4
–5
–6
With their combination of low price, excellent differential gain
(0.08%), differential phase (0.09º), and 0.1 dB flatness out to
11 MHz, these amplifiers are ideal for consumer video
applications.
1
10
100
1k
FREQUENCY (MHz)
Figure 4. Small Signal Frequency Response
Rev. C
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