ADA4851-2YRMZ Analog Devices Inc, ADA4851-2YRMZ Datasheet - Page 17
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ADA4851-2YRMZ
Manufacturer Part Number
ADA4851-2YRMZ
Description
IC OPAMP VF R-R DUAL LP 8MSOP
Manufacturer
Analog Devices Inc
Datasheet
1.ADA4851-1YRJZ-R2.pdf
(24 pages)
Specifications of ADA4851-2YRMZ
Slew Rate
375 V/µs
Amplifier Type
Voltage Feedback
Number Of Circuits
2
Output Type
Rail-to-Rail
-3db Bandwidth
105MHz
Current - Input Bias
2.2µA
Voltage - Input Offset
600µV
Current - Supply
2.9mA
Current - Output / Channel
125mA
Voltage - Supply, Single/dual (±)
2.7 V ~ 12 V, ±1.35 V ~ 6 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Op Amp Type
High Speed
No. Of Amplifiers
2
Bandwidth
130MHz
Supply Voltage Range
2.7V To 12V
Amplifier Case Style
MSOP
No. Of Pins
8
Operating Temperature Range
-40°C To
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ADA4851-2YRMZ
Manufacturer:
ADI
Quantity:
3 000
Company:
Part Number:
ADA4851-2YRMZ
Manufacturer:
M/A-COM
Quantity:
5 000
Part Number:
ADA4851-2YRMZ
Manufacturer:
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Quantity:
20 000
Company:
Part Number:
ADA4851-2YRMZ-RL7
Manufacturer:
ADI
Quantity:
3 000
Part Number:
ADA4851-2YRMZ-RL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
CIRCUIT DESCRIPTION
The ADA4851-1/ADA4851-2/ADA4851-4 feature a high slew
rate input stage that is a true single-supply topology, capable of
sensing signals at or below the negative supply rail. The rail-to-
rail output stage can pull within 60 mV of either supply rail when
driving light loads and within 0.17 V when driving 150 Ω. High
speed performance is maintained at supply voltages as low as 2.7 V.
HEADROOM CONSIDERATIONS
These amplifiers are designed for use in low voltage systems.
To obtain optimum performance, it is useful to understand the
behavior of the amplifiers as input and output signals approach
the headroom limits of the amplifiers. The input common-mode
voltage range of the amplifiers extends from the negative supply
voltage (actually 200 mV below the negative supply), or from
ground for single-supply operation, to within 2.2 V of the positive
supply voltage. Therefore, at a gain of 3, the amplifiers can
provide full rail-to-rail output swing for supply voltages as low
as 3.3 V and down to 3 V for a gain of 4.
Exceeding the headroom limit is not a concern for any inverting
gain on any supply voltage as long as the reference voltage at the
positive input of the amplifier lies within the input common- mode
range of the amplifier.
The input stage is the headroom limit for signals approaching
the positive rail. Figure 40 shows a typical offset voltage vs. the
input common-mode voltage for the ADA4851-1/ADA4851-2/
ADA4851-4 amplifiers on a ±5 V supply. Accurate dc performance
is maintained from approximately 200 mV below the negative
supply to within 2.2 V of the positive supply. For high speed
signals, however, there are other considerations. Figure 41
shows −3 dB bandwidth vs. input common-mode voltage for a
unity-gain follower. As the common-mode voltage approaches
2 V of positive supply, the amplifier responds well but the
bandwidth begins to drop as the common-mode voltage
approaches the positive supply. This can manifest itself in
increased distortion or settling time. Higher frequency signals
require more headroom than the lower frequencies to maintain
distortion performance.
Rev. J | Page 17 of 24
Figure 41. Unity-Gain Follower Bandwidth vs. Input Common-Mode
440
460
480
500
520
540
560
580
600
–1
–2
–3
–4
–5
–6
1
0
2
0.1
–6
ADA4851-1/ADA4851-2/ADA4851-4
G = +1
R
V
Figure 40. V
L
S
–5
= 1kΩ
= 5V
–4
1
OS
–3
vs. Common-Mode Voltage, V
FREQUENCY (MHz)
–2
V
CM
–1
10
(V)
0
1
100
2
S
V
V
V
V
= ±5 V
CM
CM
CM
CM
= 3.0V
= 3.1V
= 3.2V
= 3.3V
3
1000
4