Low Cost, High Speed,
Rail-to-Rail Output Op Amps

ADA4851-1/ADA4851-2/ADA4851-4


Rev. C
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FEATURES
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
Differential gain: 0.08%
Differential phase: 0.09°
Fully specified at +3 V, +5 V, and ±5 V supplies
Rail-to-rail output
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
Available in space-saving packages
SOT-23-6, TSSOP-14, and MSOP-8
APPLICATIONS
Consumer video
Professional video
Video switchers
Active filters
PIN CONFIGURATIONS
V
OUT
1
+IN 3
2
ADA4851-1
TOP VIEW (Not to Scale)
–V
S
+V
S
6
–IN4
5 POWER DOWN
05143-001
Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)
OUT1 1
–IN1 2
+IN1 3
–V
S
4
+V
S
8
OUT7
–IN26
+IN25
ADA4851-2
TOP VIEW
(Not to Scale)
05143-058
Figure 2. ADA4851-2, 8-Lead MSOP (RM-8)
1
2
3
4
5
6
7
ADA4851-4
TOP VIEW
(Not to Scale)
–IN 1
+IN 1
+V
S
V
OUT
2
–IN 2
+IN 2
V
OUT
1 14
13
12
11
10
9
8
–IN 4
+IN 4
–V
S
V
OUT
3
–IN 3
+IN 3
V
OUT
4
05143-054

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 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.
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.
The ADA4851 family is designed to work over the extended
temperature range (−40°C to +125°C).
CLOSED-LOOP GAIN (dB)
1 10010 1k
05143-
004
FREQUENCY (MHz)
–6
–4
–5
–2
–3
0
–1
2
1
4
3
G = +1
V
S
= 5V
R
L
= 1kΩ
C
L
= 5pF

Figure 4. Small Signal Frequency Response