AD ADA4853-1 Low power, rail-to-rail output, video op amps with ultralow power Datasheet

Low Power, Rail-to-Rail Output,
Video Op Amps with Ultralow Power
ADA4853-1/ADA4853-2/ADA4853-3
TOP VIEW
(Not to Scale)
3
+VS
4
+IN
5
–IN
6
VOUT
7
+
–
11 +IN
10 –IN
9
VOUT
9
+IN2
NC
PD1
PD2
14
13
14 VOUT
+ –
13 –IN
12 +IN
ADA4853-3
11 –VS
10 +IN
+ –
– +
9
–IN
8
VOUT
05884-057
–VS 8
+ –
15
NC
+IN
VOUT
–IN
14
2
13
+VS
16
15
1
DISABLE 3
12 –VS
+VS 4
DISABLE 1
– +
DISABLE 3 3
–IN2
+
NC = NO CONNECT
DISABLE 2
DISABLE 2 2
10
Figure 2. 16-Lead LFCSP_VQ
ADA4853-3
DISABLE 1 1
VOUT2
–
05884-058
Figure 1. 6-Lead SC70
+VS
11
05884-056
–IN
–VS 4
12
NC 8
4
+
NC 7
POWER DOWN
+IN1 3
NC 6
5
–
NC 5
+IN 3
+VS
–IN1 2
05884-001
–VS 2
6
VOUT 7
Portable multimedia players
Video cameras
Digital still cameras
Consumer video
Clock buffer
VOUT 1
ADA4853-1
–IN 6
APPLICATIONS
ADA4853-2
VOUT1 1
+IN 5
Ultralow power-down current: 0.1 μA
Low quiescent current: 1.4 mA/amplifier
Ideal for standard definition video
High speed
100 MHz, −3 dB bandwidth
120 V/μs slew rate
0.5 dB flatness: 22 MHz
Differential gain: 0.20%
Differential phase: 0.10°
Single-supply operation
Rail-to-rail output
Output swings to within 200 mV of either rail
Low voltage offset: 1 mV
Wide supply range: 2.65 V to 5 V
16
PIN CONFIGURATIONS
FEATURES
Figure 3. 16-Lead LFCSP_VQ
Figure 4. 14-Lead TSSOP
GENERAL DESCRIPTION
The ADA4853-1/ADA4853-2/ADA4853-3 provide users with
a true single-supply capability, allowing input signals to extend
200 mV below the negative rail and to within 1.2 V of the
positive rail. On the output, the amplifiers can swing within
200 mV of either supply rail.
The ADA4853-1 is available in a 6-lead SC70, the ADA4853-2 is
available in a 16-lead LFCSP_VQ, and the ADA4853-3 is available
in both a 16-lead LFCSP_VQ and a 14-lead TSSOP. The
ADA4853-1 temperature range is −40°C to +85°C, while the
ADA4853-2/ADA4853-3 temperature range is −40°C to +105°C.
6.5
6.4
0.1V p-p
VS = 5V
RL = 150Ω
G = +2
6.3
6.2
6.1
2.0V p-p
6.0
5.9
5.8
5.7
05884-010
The ADA4853-1/ADA4853-2/ADA4853-3 voltage feedback op
amps are designed to operate at supply voltages as low as 2.65 V
and up to 5 V using only 1.4 mA of supply current per amplifier.
To further reduce power consumption, the amplifiers are equipped
with a power-down mode that lowers the supply current to less
than 1.5 μA maximum, making them ideal in battery-powered
applications.
With their combination of low price, excellent differential gain
(0.2%), differential phase (0.10°), and 0.5 dB flatness out to
22 MHz, these amplifiers are ideal for video applications.
CLOSED-LOOP GAIN (dB)
The ADA4853-1/ADA4853-2/ADA4853-3 are low power, low
cost, high speed, rail-to-rail output op amps with ultralow power
disables that are ideal for portable consumer electronics. Despite
their low price, the ADA4853-1/ADA4853-2/ADA4853-3 provide
excellent overall performance and versatility. The 100 MHz,
−3 dB bandwidth, and 120 V/μs slew rate make these amplifiers
well-suited for many general-purpose, high speed applications.
5.6
5.5
0.1
1
FREQUENCY (MHz)
10
40
Figure 5. 0.5 dB Flatness Frequency Response
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2007 Analog Devices, Inc. All rights reserved.
ADA4853-1/ADA4853-2/ADA4853-3
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................6
Applications ....................................................................................... 1
Circuit Description......................................................................... 14
Pin Configurations ........................................................................... 1
Headroom Considerations ........................................................ 14
General Description ......................................................................... 1
Overload Behavior and Recovery ............................................ 14
Revision History ............................................................................... 2
Applications Information .............................................................. 15
Specifications..................................................................................... 3
Single-Supply Video Amplifier ................................................. 15
Specifications with 3 V Supply ................................................... 3
Power Supply Bypassing ............................................................ 15
Specifications with 5 V Supply ................................................... 4
Layout .......................................................................................... 15
Absolute Maximum Ratings............................................................ 5
Outline Dimensions ....................................................................... 16
Thermal Resistance ...................................................................... 5
Ordering Guide .......................................................................... 16
ESD Caution .................................................................................. 5
REVISION HISTORY
10/07—Rev. B to Rev. C
Changes to Applications Section .................................................... 1
Changes to Ordering Guide .......................................................... 16
10/06—Rev. A to7 Rev. B
Added ADA4853-3 ............................................................. Universal
Added 16-Lead LFCSP_VQ .............................................. Universal
Added 14-Lead TSSOP ...................................................... Universal
Changes to Features.......................................................................... 1
Changes to DC Performance, Input Characteristics, and Power
Supply Sections ................................................................................. 3
Changes to DC Performance, Input Characteristics, and Power
Supply Sections ................................................................................. 4
Changes to Figure 20 ........................................................................ 8
Changes to Figure 49 ...................................................................... 13
Updated Outline Dimensions ....................................................... 16
Changes to Ordering Guide .......................................................... 16
7/06—Rev. 0 to Rev. A
Added ADA4853-2 ............................................................. Universal
Changes to Features and General Description ..............................1
Changes to Table 1.............................................................................3
Changes to Table 2.............................................................................4
Changes to Table 3.............................................................................5
Changes to Figure 7 ...........................................................................6
Changes to Figure 11 Caption, Figure 12, Figure 13,
and Figure 16......................................................................................7
Changes to Figure 17 and Figure 19................................................8
Inserted Figure 21; Renumbered Sequentially ..............................8
Inserted Figure 25; Renumbered Sequentially ..............................9
Changes to Figure 28.........................................................................9
Changes to Figure 31 through Figure 35 ..................................... 10
Changes to Figure 37, Figure 39 through Figure 42 .................. 11
Inserted Figure 43 and Figure 46.................................................. 12
Inserted Figure 47 ........................................................................... 13
Changes to Circuit Description Section ...................................... 13
Changes to Headroom Considerations Section ......................... 13
Changes to Figure 48...................................................................... 14
Updated Outline Dimensions ....................................................... 15
Changes to Ordering Guide .......................................................... 15
1/06—Revision 0: Initial Version
Rev. C | Page 2 of 16
ADA4853-1/ADA4853-2/ADA4853-3
SPECIFICATIONS
SPECIFICATIONS WITH 3 V SUPPLY
TA = 25°C, RF = 1 kΩ, RG = 1 kΩ for G = +2, RL = 150 Ω, unless otherwise noted.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Bandwidth for 0.5 dB Flatness
Settling Time to 0.1%
Slew Rate
NOISE/DISTORTION PERFORMANCE
Differential Gain
Differential Phase
Input Voltage Noise
Input Current Noise
Crosstalk
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Bias Current Drift
Input Bias Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Input Overdrive Recovery Time (Rise/Fall)
Common-Mode Rejection Ratio
POWER-DOWN
Power-Down Input Voltage
Turn-Off Time
Turn-On Time
Power-Down Bias Current
Enabled
Power-Down
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time
Output Voltage Swing
Short-Circuit Current
POWER SUPPLY
Operating Range
Quiescent Current/Amplifier
Quiescent Current (Power-Down)/Amplifier
Positive Power Supply Rejection
Negative Power Supply Rejection
Conditions
Min
Typ
88
90
32
22
45
100
MHz
MHz
MHz
ns
V/μs
RL = 150 Ω
RL = 150 Ω
f = 100 kHz
f = 100 kHz
G = +2, VO = 2 V p-p, RL = 150 Ω, f = 5 MHz
0.20
0.10
22
2.2
−66
%
Degrees
nV/√Hz
pA/√Hz
dB
VO = 0.5 V to 2.5 V
72
1
1.6
1.0
4
50
80
−69
0.5/20
0.6
−0.2 to +VCC − 1.2
40
−85
MΩ
pF
V
ns
dB
Power-down
1.2
1.4
120
V
μs
ns
Power-down = 3.0 V
Power-down = 0 V
25
0.01
G = +1, VO = 0.1 V p-p
G = +2, VO = 2 V p-p
G = +2, VO = 2 V p-p, RL = 150 Ω
VO = 2 V step
G = +2, VO = 2 V step
Differential/common mode
VIN = −0.5 V to +3.5 V, G = +1
VCM = 0 V to 1 V
VIN = −0.25 V to +1.75 V, G = +2
RL = 150 Ω
Sinking/sourcing
0.3 to 2.7
Rev. C | Page 3 of 16
−76
−77
4
1.7
30
70
0.15 to 2.88
150/120
2.65
Power-down = low
+VS = +1.5 V to +2.5 V, −VS = −1.5 V
−VS = −1.5 V to −2.5 V, +VS = +1.5 V
Max
1.3
0.1
−86
−88
Unit
mV
μV/°C
μA
nA/°C
nA
dB
μA
μA
ns
V
mA
5
1.6
1.5
V
mA
μA
dB
dB
ADA4853-1/ADA4853-2/ADA4853-3
SPECIFICATIONS WITH 5 V SUPPLY
TA = 25°C, RF = 1 kΩ, RG = 1 kΩ for G = +2, RL = 150 Ω, unless otherwise noted.
Table 2.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Bandwidth for 0.5 dB Flatness
Settling Time to 0.1%
Slew Rate
NOISE/DISTORTION PERFORMANCE
Differential Gain
Differential Phase
Input Voltage Noise
Input Current Noise
Crosstalk
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Bias Current Drift
Input Bias Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Input Overdrive Recovery Time (Rise/Fall)
Common-Mode Rejection Ratio
POWER-DOWN
Power-Down Input Voltage
Turn-Off Time
Turn-On Time
Power-Down Bias Current
Enabled
Power-Down
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time
Output Voltage Swing
Short-Circuit Current
POWER SUPPLY
Operating Range
Quiescent Current/Amplifier
Quiescent Current (Power-Down)/Amplifier
Positive Power Supply Rejection
Negative Power Supply Rejection
Conditions
Min
Typ
93
100
35
22
54
120
MHz
MHz
MHz
ns
V/μs
RL = 150 Ω
RL = 150 Ω
f = 100 kHz
f = 100 kHz
G = +2, VO = 2 V p-p, RL = 150 Ω, f = 5 MHz
0.22
0.10
22
2.2
−66
%
Degrees
nV/√Hz
pA/√Hz
dB
VO = 0.5 V to 4.5 V
72
1
1.6
1.0
4
60
80
−71
0.5/20
0.6
−0.2 to +VCC − 1.2
40
−88
MΩ
pF
V
ns
dB
Power-down
1.2
1.5
120
V
μs
ns
Power-down = 5 V
Power-down = 0 V
40
0.01
G = +1, VO = 0.1 V p-p
G = +2, VO = 2 V p-p
G = +2, VO = 2 V p-p
VO = 2 V step
G = +2, VO = 2 V step
Differential/common mode
VIN = −0.5 V to +5.5 V, G = +1
VCM = 0 V to 3 V
VIN = −0.25 V to +2.75 V, G = +2
RL = 75 Ω
Sinking/sourcing
0.55 to 4.5
Rev. C | Page 4 of 16
−75
−75
4.1
1.7
50
55
0.1 to 4.8
160/120
2.65
Power-down = low
+VS = +2.5 V to +3.5 V, −VS = −2.5 V
−VS = −2.5 V to −3.5 V, +VS = +2.5 V
Max
1.4
0.1
−80
−80
Unit
mV
μV/°C
μA
nA/°C
nA
dB
μA
μA
ns
V
mA
5
1.8
1.5
V
mA
μA
dB
dB
ADA4853-1/ADA4853-2/ADA4853-3
ABSOLUTE MAXIMUM RATINGS
Table 3.
Rating
5.5 V
See Figure 6
−VS − 0.2 V to +VS − 1.2 V
±VS
−65°C to +125°C
PD = Total Power Consumed − Load Power
(
RMS output voltages should be considered.
Figure 6 shows the maximum safe power dissipation in the
package vs. the ambient temperature for the 6-lead SC70
(430°C/W), the 14-lead TSSOP (120°C/W), and the 16-lead
LFCSP_VQ (63°C/W) on a JEDEC standard 4-layer board. θJA
values are approximations.
3.0
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, θJA is
specified for the device soldered in the circuit board for
surface-mount packages.
Table 4.
Unit
°C/W
°C/W
°C/W
2.5
2.0
LFCSP
1.5
TSSOP
1.0
0.5
SC70
0
–55
–35
–15
5
25
45
65
AMBIENT TEMPERATURE (°C)
85
105
125
05884-059
θJA
430
63
120
VOUT 2
RL
Airflow increases heat dissipation, effectively reducing θJA.
In addition, more metal directly in contact with the package
leads and through holes under the device reduces θJA.
−40°C to +85°C
−40°C to +105°C
−40°C to +105°C
JEDEC J-STD-20
150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Package Type
6-Lead SC70
16-Lead LFCSP_VQ
14-Lead TSSOP
)
PD = VSUPPLY VOLTAGE × I SUPPLY CURRENT –
MAXIMUM POWER DISSIPATION (W)
Parameter
Supply Voltage
Power Dissipation
Common-Mode Input Voltage
Differential Input Voltage
Storage Temperature Range
Operating Temperature Range
6-Lead SC70
16-Lead LFCSP_VQ
14-Lead TSSOP
Lead Temperature
Junction Temperature
The power dissipated in the package (PD) for a sine wave and a
resistor load is the total power consumed from the supply
minus the load power.
Figure 6. Maximum Power Dissipation vs. Temperature for a 4-Layer Board
ESD CAUTION
Maximum Power Dissipation
The maximum safe power dissipation for the ADA4853-1/
ADA4853-2/ADA4853-3 is limited by the associated rise in
junction temperature (TJ) on the die. At approximately 150°C,
which is the glass transition temperature, the plastic changes its
properties. Even temporarily exceeding this temperature limit
can change the stresses that the package exerts on the die,
permanently shifting the parametric performance of the
amplifiers. Exceeding a junction temperature of 150°C for an
extended period can result in changes in silicon devices,
potentially causing degradation or loss of functionality.
Rev. C | Page 5 of 16
ADA4853-1/ADA4853-2/ADA4853-3
TYPICAL PERFORMANCE CHARACTERISTICS
5
ADA4853-3
LFCSP
1
4
3
G = –1*
CLOSED-LOOP GAIN (dB)
0
G = +2*
–1
G = +10*
–2
–3
*ADA4853-1/ADA4853-2
–4
1
10
100
200
6.4
RSNUB
CL
RL
1
10
FREQUENCY (MHz)
100 200
VS = 5V
RL = 150Ω
G = +2
0.1V p-p
6.3
0
CLOSED-LOOP GAIN (dB)
CLOSED-LOOP GAIN (dB)
–3
6.5
RL = 75Ω
VS = 5V
G = +1
VOUT = 0.1V p-p
RL = 1kΩ
–1
RL = 150Ω
–2
–3
–4
6.2
6.1
2.0V p-p
6.0
5.9
5.8
5.7
–5
5.6
1
10
FREQUENCY (MHz)
100 200
5.5
0.1
05884-007
–6
0.1
Figure 8. Small Signal Frequency Response for Various Loads
4
VS = 5V
0
–1
–2
–3
7.4
7.0
6.8
6.6
6.4
6.2
6.0
–5
5.8
10
FREQUENCY (MHz)
100 200
Figure 9. Small Signal Frequency Response for Various Supplies
0.1V p-p
7.2
–4
1
40
VS = 5V
7.8 RL = 150Ω
G = +2
7.6
CLOSED-LOOP GAIN (dB)
1
10
8.0
VS = 3V
G = +1
RL = 150Ω
VOUT = 0.1V p-p
1
FREQUENCY (MHz)
Figure 11. 0.5 dB Flatness Response for Various Output Voltages
2V p-p
5.6
05884-008
CLOSED-LOOP GAIN (dB)
–2
Figure 10. Small Signal Frequency Response for Various Capacitive Loads
1
–6
0.1
CL = 0pF
–6
0.1
3
2
0
–1
–5
Figure 7. Small Signal Frequency Response for Various Gains
3
1
05884-009
VS = 5V
RL = 150Ω
VOUT = 0.1V p-p
FREQUENCY (MHz)
2
CL = 5pF
2
05884-010
–6
0.1
CL = 10pF/25Ω SNUB
CL = 10pF
0.1
1
10
FREQUENCY (MHz)
100
1000
05884-060
–5
VS = 5V
RL = 150Ω
VOUT = 0.1V p-p
G = +1
–4
05884-006
NORMALIZED CLOSED-LOOP GAIN (dB)
2
Figure 12. ADA4853-3 LFCSP_VQ Flatness Response for Various Output Voltages
Rev. C | Page 6 of 16
ADA4853-1/ADA4853-2/ADA4853-3
1
4
0
2
CLOSED-LOOP GAIN (dB)
G = +2
G = +10
–1
VS = 5V
RL = 150Ω
VOUT = 0.1V p-p
G = +1
3
–2
–3
–4
VS = 5V
RL = 150Ω
VOUT = 2V p-p
1
0
–40°C
–1
–2
–3
–5
1
10
FREQUENCY (MHz)
100
200
–6
0.1
Figure 13. Large Signal Frequency Response for Various Gains
1
10
FREQUENCY (MHz)
100 200
05884-014
–6
0.1
Figure 16. Small Signal Frequency Response for Various Temperatures
7
250
VS = 5V
RL = 150Ω
G = +2
6
200
RL= 75Ω
NEGATIVE SLEW RATE
RL= 1kΩ
5
SLEW RATE (V/µs)
CLOSED-LOOP GAIN (dB)
+85°C
+25°C
–4
–5
05884-011
NORMALIZED CLOSED-LOOP GAIN (dB)
G = –1
RL= 150Ω
4
3
150
POSITIVE SLEW RATE
100
2
10
FREQUENCY (MHz)
100
200
0
Figure 14. Large Signal Frequency Response for Various Loads
5
4
1.0
1.5
2.0
2.5
3.0
OUTPUT VOLTAGE STEP (V)
140
+85°C
+25°C
3.5
VS = 5V
RL = 150Ω
120
2
1
–40°C
0
0.5
4.0
Figure 17. Slew Rate vs. Output Voltage
OPEN-LOOP GAIN (dB)
CLOSED-LOOP GAIN (dB)
3
VS = 3V
RL = 150Ω
VOUT = 0.1V p-p
G = +1
0
–1
–2
–3
0
–30
–60
100
PHASE
–90
80
–120
60
GAIN
40
–150
20
–180
0
–210
–4
–6
0.1
1
10
FREQUENCY (MHz)
100 200
05884-013
–5
Figure 15. Small Signal Frequency Response for Various Temperatures
Rev. C | Page 7 of 16
–20
100
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
Figure 18. Open-Loop Gain and Phase vs. Frequency
–240
OPEN-LOOP PHASE (Degrees)
1
05884-029
0
0.1
05884-012
VS = 5V
VOUT = 2V p-p
G = +2
05884-015
50
1
ADA4853-1/ADA4853-2/ADA4853-3
10M
–40
–50
–60
–70
–80
–90
100
1k
10k
100k
1M
10M
VS = 5V
G = +1
ADA4853-1/
ADA4853-2
1M
100k
ADA4853-3
10k
1k
100
10
100
100M
1k
FREQUENCY (Hz)
100M
G = +2
VS = 3V
VOUT = 2V p-p
–50
HARMONIC DISTORTION (dBc)
–PSR
–30
–40
+PSR
–60
–70
–80
RL = 150Ω HD2
RL = 150Ω HD3
–60
–70
RL = 1kΩ HD3
–80
RL = 1kΩ HD2
–90
–100
–90
1k
10k
100k
1M
10M
100M
FREQUENCY (Hz)
–110
0.1
05884-031
–100
100
Figure 20. Power Supply Rejection vs. Frequency
1000
–40
–50
HARMONIC DISTORTION (dBc)
100
10
1
10k
100k
1M
10M
G = +2
VS = 5V
VOUT = 2V p-p
RL = 150Ω HD3
–60
–70
RL = 150Ω HD2
RL = 1kΩ HD3
–80
–90
–100
RL = 1kΩ HD2
–110
05884-032
0.1
1k
10
Figure 23. Harmonic Distortion vs. Frequency
VS = 5V
G = +1
0.01
100
1
FREQUENCY (MHz)
05884-016
POWER SUPPLY REJECTION (dB)
–40
–20
CLOSED-LOOP OUTPUT IMPEDANCE (Ω)
10M
Figure 22. Output Impedance vs. Frequency Disabled
VS = 5V
GAIN = +2
RTO
–50
1M
–120
0.1
100M
FREQUENCY (Hz)
Figure 21. Output Impedance vs. Frequency Enabled
1
FREQUENCY (MHz)
Figure 24. Harmonic Distortion vs. Frequency
Rev. C | Page 8 of 16
10
05884-017
0
100k
FREQUENCY (Hz)
Figure 19. Common-Mode Rejection vs. Frequency
–10
10k
05884-050
–30
CLOSED-LOOP OUTPUT IMPEDANCE (Ω)
VS = 5V
05884-030
COMMON-MODE REJECTION (dB)
–20
ADA4853-1/ADA4853-2/ADA4853-3
–40
–50
2.58
RL = 150Ω HD3
OUTPUT VOLTAGE (V)
RL = 150Ω HD2
–70
RL = 75Ω HD2
–80
RL = 75Ω HD3
–90
2.54
VS = 5V
2.52
2.50
2.48
2.46
RL = 1kΩ HD3
1
FREQUENCY (MHz)
05884-033
2.44
RL = 1kΩ HD2
–120
0.1
2.42
10
2.40
Figure 28. Small Signal Pulse Response for Various Supplies
Figure 25. Harmonic Distortion vs. Frequency
–30
2.60
G = +2
VOUT = 2V p-p
–40 RL = 75Ω
2.58
G = +1; CL = 5pF
2.56
–50
OUTPUT VOLTAGE (V)
VS = 3V HD3
–60
VS = 5V HD2
–70
VS = 3V HD2
–80
VS = 5V HD3
2.54
G = +2; CL = 0pF, 5pF, 10pF
2.52
2.50
2.48
2.46
2.44
2.42
10
1
FREQUENCY (MHz)
2.40
05884-051
–100
0.1
Figure 29. Small Signal Pulse Response for Various Capacitive Loads
Figure 26. Harmonic Distortion vs. Frequency
–40
3.75
G = +1
VS = 5V
RL = 150Ω
f = 100kHz
–50
5V
3.50
3.25
OUTPUT VOLTAGE (V)
2V
–60
VS = 5V
RL = 150Ω
25ns/DIV
05884-034
–90
GND
–70
–80
–90
G = +2
RL = 150Ω
25ns/DIV
VS = 3V, 5V
3.00
2.75
2.50
2.25
2.00
–100
HD2
1.75
05884-019
–110
HD3
–120
0
1
2
VOUT (V p-p)
3
1.50
1.25
4
Figure 27. Harmonic Distortion for Various Output Voltages
Figure 30. Large Signal Pulse Response for Various Supplies
Rev. C | Page 9 of 16
05884-035
HARMONIC DISTORTION (dBc)
VS = 3V
–100
–110
HARMONIC DISTORTION (dBc)
G = +2
RL = 150Ω
25ns/DIV
2.56
–60
05884-018
HARMONIC DISTORTION (dBc)
2.60
G = +1
VS = 5V
VOUT = 2V p-p
ADA4853-1/ADA4853-2/ADA4853-3
3.50
OUTPUT VOLTAGE (V)
3.25
1000
G = +2
VS = 5V
RL = 150Ω
25ns/DIV
CL = 0pF, 20pF
3.00
VOLTAGE NOISE (nV/ Hz)
3.75
2.75
2.50
2.25
2.00
100
1.50
1.25
10
10
100
1k
10k
100k
1M
05884-037
05884-036
1.75
10M
FREQUENCY (Hz)
Figure 31. Large Signal Pulse Response for Various Capacitive Loads
5.5
4.5
100
VS = 5V
G = +2
RL = 150Ω
f = 1MHz
OUTPUT
CURRENT NOISE (pA/ Hz)
3.5
2.5
1.5
10
1
10
05884-020
–0.5
100ns/DIV
4.5
10k
100k
1M
10M
Figure 35. Current Noise vs. Frequency
20
VS = 5V
G = +1
RL = 150Ω
f = 1MHz
18
16
OUTPUT
VS = 5V
N = 155
x = –0.370mV
σ = 0.782
14
3.5
COUNT
12
2.5
1.5
10
8
6
4
0.5
2
–0.5
100ns/DIV
05884-021
INPUT AND OUTPUT VOLTAGE (V)
INPUT
1k
FREQUENCY (Hz)
Figure 32. Output Overdrive Recovery
5.5
100
05884-038
0.5
0
–4
–3
–2
–1
0
1
VOS (mV)
Figure 36. VOS Distribution
Figure 33. Input Overdrive Recovery
Rev. C | Page 10 of 16
2
3
4
05884-042
INPUT AND OUTPUT VOLTAGE (V)
2 × INPUT
Figure 34. Voltage Noise vs. Frequency
ADA4853-1/ADA4853-2/ADA4853-3
–0.50
–0.6
VS = 5V
–0.52
INPUT BIAS CURRENT (µA)
–0.8
–1.2
–1.4
–1.6
–1.8
–0.54
VS = 5V
–0.56
–0.58
+IB
–0.60
VS = 3V
–0.62
–0.64
–IB
–0.66
0
0.5
1.0
1.5 2.0
VCM (V)
2.5
3.0
3.5
4.0
–0.68
–40
05884-022
–2.0
–1.0 –0.5
4.5
0
20
80
3.0
VS = 3V
LOAD RESISTANCE TIED
TO MIDSUPPLY
POSITIVE SWING
2.8
VS = 5V, T = –40°C
VS = 5V, T = +25°C
OUTPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
60
Figure 40. Input Bias Current vs. Temperature
VS = 5V, T = +85°C
1.0
40
TEMPERATURE (°C)
Figure 37. VOS vs. Common-Mode Voltage
1.5
–20
05884-027
VOS (mV)
–1.0
VS = 3V, T = –40°C
VS = 3V, T = +25°C
VS = 3V, T = +85°C
0.5
2.6
2.4
0.6
0.4
0.2
0
0.5
1.0
1.5
2.0 2.5
3.0
3.5
POWER DOWN VOLTAGE (V)
4.0
4.5
0
05884-023
0
5.0
1
10
1k
10k
Figure 41. Output Voltage vs. Load Resistance
Figure 38. Supply Current vs. POWER DOWN Voltage
5.0
–0.6
VS = 5V
4.8
–0.7
OUTPUT VOLTAGE (V)
VS = 5V
VS = 3V
–0.8
LOAD RESISTANCE TIED
TO MIDSUPPLY
POSITIVE SWING
4.6
4.4
0.6
0.4
–0.9
0.2
–25
0
25
50
TEMPERATURE (°C)
75
100
NEGATIVE SWING
0
10
100
1k
LOAD RESISTANCE (Ω)
Figure 39. Input Offset Voltage vs. Temperature
Figure 42. Output Voltage vs. Load Resistance
Rev. C | Page 11 of 16
10k
05884-040
–1.0
–50
05884-026
INPUT OFFSET VOLTAGE (mV)
100
LOAD RESISTANCE (Ω)
05884-039
NEGATIVE SWING
ADA4853-1/ADA4853-2/ADA4853-3
3.0
0.25
VS = 3V
RL = 150Ω
OUTPUT SATURATION VOLTAGE (V)
2.9
OUTPUT VOLTAGE (V)
2.8
POSITIVE SWING
2.7
2.6
2.5
0.5
0.4
0.3
NEGATIVE SWING
0.2
+VSAT
0.20
VS = 5V
0.15
0.10
–VSAT
VS = 3V
0.05
0
5
10
15
20
25
30
35
40
45
50
LOAD CURRENT (mA)
0
20
40
60
80
TEMPERATURE (°C)
3.0
VS = 5V
VS = 5V
RL = 150Ω
3.1
4.9
VOUTPUT
2.9
POSITIVE SWING
4.7
2VINPUT
2.8
2.7
VOLTAGE (V)
4.6
4.5
0.5
0.4
2.6
2VINPUT – VOUTPUT
2.5
2.2
NEGATIVE SWING
0.2
+0.001
(+0.1%)
–0.001
(–0.1%)
2.4
2.3
0.3
2VINPUT – VOUTPUT (V)
4.8
2.1
0.1
0
5
10
15
20
25
30
35
40
LOAD CURRENT (mA)
45
50
Figure 44. Output Voltage vs. Load Current
1.9
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
TIME (ns)
Figure 46. 0.1% Settling Time
Rev. C | Page 12 of 16
05884-045
2.0
0
05884-052
OUTPUT VOLTAGE (V)
–20
Figure 45. Output Saturation Voltage vs. Temperature for Various Supplies
Figure 43. Output Voltage vs. Load Current
5.0
0
–40
05884-041
0
05884-053
0.1
ADA4853-1/ADA4853-2/ADA4853-3
0
3
2
VOUT
ADA4853-1/
ADA4853-2
3
2
1
1
G = +2
VS = 5V
fIN = 100kHz
0
–1
0
1
2
3
0
4
5
6
7
8
9
10
TIME (µs)
INPUT-TO-OUTPUT ISOLATION (dB)
4
OUTPUT VOLTAGE (V)
VOUT
ADA4853-3
5
05884-046
POWER DOWN PIN VOLTAGE (V)
POWER DOWN
VS = 5V
G = +2
RL = 150Ω
VOUT = 2V p-p
–60
VOUT2 TO VOUT1
ADA4853-2
–70
VOUT1 TO VOUT2
ADA4853-2
–80
ADA4853-3
ALL HOSTILE
–90
–100
100k
1M
10M
FREQUENCY (Hz)
100M 200M
05884-054
CROSSTALK (dB)
–50
–40
–60
–80
–100
0.1
1
10
100
FREQUENCY (MHz)
Figure 49. Input-to-Output Isolation, Chip Disabled
Figure 47. Enable/Disable Time
–40
–20
VS = 5V
RL = 150Ω
VIN = 1V p-p
G = +2
Figure 48. Crosstalk vs. Frequency
Rev. C | Page 13 of 16
200
05884-055
6
ADA4853-1/ADA4853-2/ADA4853-3
CIRCUIT DESCRIPTION
The ADA4853-1/ADA4853-2/ADA4853-3 feature a high slew
rate input stage that is a true single-supply topology capable of
sensing signals at or below the minus supply rail. The rail-torail output stage can pull within 100 mV of either supply rail
when driving light loads and within 200 mV when driving
150 Ω. High speed performance is maintained at supply
voltages as low as 2.65 V.
HEADROOM CONSIDERATIONS
For signals approaching the negative supply, inverting gain, and
high positive gain configurations, the headroom limit is the
output stage. The ADA4853-1/ADA4853-2/ADA4853-3 use a
common-emitter output stage. This output stage maximizes the
available output range, limited by the saturation voltage of the
output transistors. The saturation voltage increases with the
drive current that the output transistor is required to supply due
to the output transistor’s collector resistance.
The ADA4853-1/ADA4853-2/ADA4853-3 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 their headroom limits. The amplifiers’
input common-mode voltage range extends from the negative
supply voltage (actually 200 mV below this) to within 1.2 V of
the positive supply voltage.
As the saturation point of the output stage is approached, the
output signal shows increasing amounts of compression and
clipping. For the input headroom case, higher frequency signals
require a bit more headroom than the lower frequency signals.
Figure 27 illustrates this point by plotting the typical distortion
vs. the output amplitude.
Exceeding the headroom limits is not a concern for any
inverting gain on any supply voltage, as long as the reference
voltage at the amplifiers’ positive input lies within the
amplifiers’ input common-mode range.
Input
The input stage is the headroom limit for signals approaching
the positive rail. Figure 50 shows a typical offset voltage vs. the
input common-mode voltage for the ADA4853-1/ADA4853-2/
ADA4853-3 on a 5 V supply. Accurate dc performance is
maintained from approximately 200 mV below the negative
supply to within 1.2 V of the positive supply. For high speed
signals, however, there are other considerations. As the
common-mode voltage gets within 1.2 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.
OVERLOAD BEHAVIOR AND RECOVERY
The specified input common-mode voltage of the ADA4853-1/
ADA4853-2/ADA4853-3 is 200 mV below the negative supply
to within 1.2 V of the positive supply. Exceeding the top limit
results in lower bandwidth and increased rise time. Pushing the
input voltage of a unity-gain follower to less than 1.2 V from the
positive supply leads to an increasing amount of output error as
well as increased settling time. The recovery time from input
voltages 1.2 V or closer to the positive supply is approximately
40 ns; this is limited by the settling artifacts caused by transistors in the input stage coming out of saturation.
The amplifiers do not exhibit phase reversal, even for input
voltages beyond the voltage supply rails. Going more than
0.6 V beyond the power supplies turns on protection diodes
at the input stage, greatly increasing the current draw of the
devices.
–0.6
VS = 5V
–0.8
–1.2
–1.4
–1.6
–1.8
–2.0
–1.0 –0.5
0
0.5
1.0
1.5 2.0
VCM (V)
2.5
3.0
3.5
4.0
4.5
05884-022
VOS (mV)
–1.0
Figure 50. VOS vs. Common-Mode Voltage, VS = 5 V
Rev. C | Page 14 of 16
ADA4853-1/ADA4853-2/ADA4853-3
APPLICATIONS INFORMATION
SINGLE-SUPPLY VIDEO AMPLIFIER
LAYOUT
With low differential gain and phase errors and wide 0.5 dB
flatness, the ADA4853-1/ADA4853-2/ADA4853-3 are ideal
solutions for portable video applications. Figure 51 shows a
typical video driver set for a noninverting gain of +2, where
RF = RG = 1 kΩ. The video amplifier input is terminated into a
shunt 75 Ω resistor. At the output, the amplifier has a series
75 Ω resistor for impedance matching to the video load.
As is the case with all high speed applications, careful attention
to printed circuit board (PCB) layout details prevents associated
board parasitics from becoming problematic. The ADA4853-1/
ADA4853-2/ADA4853-3 can operate at up to 100 MHz; therefore, proper RF design techniques must be employed. The PCB
should have a ground plane covering all unused portions of the
component side of the board to provide a low impedance return
path. Removing the ground plane on all layers from the area
near and under the input and output pins reduces stray capacitance. Signal lines connecting the feedback and gain resistors
should be kept as short as possible to minimize the inductance
and stray capacitance associated with these traces. Termination
resistors and loads should be located as close as possible to their
respective inputs and outputs. Input and output traces should
be kept as far apart as possible to minimize coupling (crosstalk)
through the board. Adherence to microstrip or stripline design
techniques for long signal traces (greater than 1 inch) is
recommended. For more information on high speed board
layout, go to: www.analog.com to view A Practical Guide to
High-Speed Printed-Circuit-Board Layout.
When operating in low voltage, single-supply applications, the
input signal is only limited by the input stage headroom.
RF
C1
2.2µF
+VS
+
C2
0.01µF
U1
VIN
75Ω
75Ω CABLE
V
VOUT
75Ω
05884-043
PD
RG
Figure 51. Video Amplifier
POWER SUPPLY BYPASSING
Attention must be paid to bypassing the power supply pins of
the ADA4853-1/ADA4853-2/ADA4853-3. High quality capacitors
with low equivalent series resistance (ESR), such as multilayer
ceramic capacitors (MLCCs), should be used to minimize
supply voltage ripple and power dissipation. A large, usually
tantalum, 2.2 μF to 47 μF capacitor located in proximity to the
ADA4853-1/ADA4853-2/ADA4853-3 is required to provide
good decoupling for lower frequency signals. The actual value is
determined by the circuit transient and frequency requirements.
In addition, 0.1 μF MLCC decoupling capacitors should be
located as close to each of the power supply pins as is physically
possible, no more than ⅛ inch away. The ground returns should
terminate immediately into the ground plane. Locating the bypass
capacitor return close to the load return minimizes ground loops
and improves performance.
Rev. C | Page 15 of 16
ADA4853-1/ADA4853-2/ADA4853-3
OUTLINE DIMENSIONS
5.10
5.00
4.90
2.20
2.00
1.80
1.35
1.25
1.15
6
1
5
2
2.40
2.10
1.80
4
3
14
PIN 1
0.65 BSC
1.30 BSC
1.00
0.90
0.70
0.10 MAX
6.40
BSC
1
0.40
0.10
1.10
0.80
0.30
0.15
8
4.50
4.40
4.30
PIN 1
0.65
BSC
1.05
1.00
0.80
0.46
0.36
0.26
0.22
0.08
SEATING
PLANE
7
1.20
MAX
0.15
0.05
0.10 COPLANARITY
0.30
0.19
0.20
0.09
SEATING
COPLANARITY
PLANE
0.10
0.75
0.60
0.45
8°
0°
COMPLIANT TO JEDEC STANDARDS MO-203-AB
COMPLIANT TO JEDEC STANDARDS MO-153-AB-1
Figure 52. 6-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-6)—Dimensions shown in millimeters
Figure 53. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)—Dimensions shown in millimeters
3.00
BSC SQ
0.60 MAX
0.45
PIN 1
INDICATOR
TOP
VIEW
13
12
2.75
BSC SQ
0.80 MAX
0.65 TYP
12° MAX
SEATING
PLANE
16
1
EXPOSED
PAD
0.50
BSC
0.90
0.85
0.80
0.50
0.40
0.30
PIN 1
INDICATOR
*1.65
1.50 SQ
1.35
9 (BOTTOM VIEW) 4
8
5
0.25 MIN
1.50 REF
0.05 MAX
0.02 NOM
0.30
0.23
0.18
0.20 REF
*COMPLIANT TO JEDEC STANDARDS MO-220-VEED-2
EXCEPT FOR EXPOSED PAD DIMENSION.
Figure 54. 16-Lead Lead Frame Chip Scale Package [LFCSP_VQ]
3 mm × 3 mm Body, Very Thin Quad (CP-16-3)—Dimensions shown in millimeters
ORDERING GUIDE
Model
ADA4853-1AKSZ-R21
ADA4853-1AKSZ-R71
ADA4853-1AKSZ-RL1
ADA4853-2YCPZ-R21
ADA4853-2YCPZ-RL1
ADA4853-2YCPZ-RL71
ADA4853-3YCPZ-R21
ADA4853-3YCPZ-RL1
ADA4853-3YCPZ-R71
ADA4853-3YRUZ1
ADA4853-3YRUZ-RL1
ADA4853-3YRUZ-R71
1
Temperature
Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
–40°C to +105°C
Package Description
6-Lead Thin Shrink Small Outline Transistor Package (SC70)
6-Lead Thin Shrink Small Outline Transistor Package (SC70)
6-Lead Thin Shrink Small Outline Transistor Package (SC70)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
16-Lead Lead Frame Chip Scale Package (LFCSP_VQ)
14-Lead Thin Shrink Small Outline Package (TSSOP)
14-Lead Thin Shrink Small Outline Package (TSSOP)
14-Lead Thin Shrink Small Outline Package (TSSOP)
Z = RoHS Compliant Part.
©2006–2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05884-0-10/07(C)
Rev. C | Page 16 of 16
Ordering
Quantity
250
3,000
10,000
250
5,000
1,500
250
5,000
1,500
96
2,500
1,000
Package
Option
KS-6
KS-6
KS-6
CP-16-3
CP-16-3
CP-16-3
CP-16-3
CP-16-3
CP-16-3
RU-14
RU-14
RU-14
Branding
HEC
HEC
HEC
H0H
H0H
H0H
H0L
H0L
H0L