8 MHz Rail-to-Rail
Operational Amplifiers
AD8519/AD8529
APPLICATIONS
Portable communications
Microphone amplifiers
Portable phones
Sensor interface
Active filters
PCMCIA cards
ASIC input drivers
Wearable computers
Battery-powered devices
Voltage reference buffers
Personal digital assistants
PIN CONFIGURATIONS
1
8
NC
2
7
V+
+IN A
3
6
OUT A
V–
4
5
NC
AD8519
01756-001
NC
–IN A
NC = NO CONNECT
Figure 1. 8-Lead SOIC (R Suffix)
OUT A 1
AD8519
5
V+
4
–IN A
V– 2
+IN A 3
01756-002
Space-saving SC70 and SOT-23 packaging
Wide bandwidth: 8 MHz @ 5 V
Low offset voltage: 1.2 mV maximum
Rail-to-rail output swing
2.9 V/μs slew rate
Unity gain stable
Single-supply operation: 2.7 V to 12 V
Figure 2. 5-Lead SC70 and SOT-23 (KS and RJ Suffixes)
OUT A
1
8
V+
–IN A
2
7
OUT B
+IN A
3
6
–IN B
V–
4
5
+IN B
AD8529
01756-003
FEATURES
Figure 3. 8-Lead SOIC and MSOP (R and RM Suffixes)
GENERAL DESCRIPTION
The AD8519 and AD8529 are rail-to-rail output bipolar
amplifiers with a unity gain bandwidth of 8 MHz and a typical
voltage offset of less than 1 mV. The AD8519 brings precision
and bandwidth to the SC70 and SOT-23 packages. The low
supply current makes the AD8519/AD8529 ideal for batterypowered applications. The rail-to-rail output swing of the
AD8519/AD8529 is larger than standard video op amps, making
them useful in applications that require greater dynamic range
than standard video op amps. The 2.9 V/μs slew rate makes the
AD8519/AD8529 a good match for driving ASIC inputs such as
voice codecs.
The small SC70 package makes it possible to place the AD8519
next to sensors, reducing external noise pickup.
The AD8519/AD8529 is specified over the extended industrial
(−40°C to +125°C) temperature range. The AD8519 is available
in 5-lead SC70 and 5-lead SOT-23 packages, and an 8-lead
SOIC surface-mount package. The AD8529 is available in 8-lead
SOIC and 8-lead MSOP packages.
Rev. D
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 ©1998–2007 Analog Devices, Inc. All rights reserved.
AD8519/AD8529
TABLE OF CONTENTS
Features .............................................................................................. 1
ESD Caution...................................................................................7
Applications....................................................................................... 1
Typical Performance Characteristics ..............................................8
Pin Configurations ........................................................................... 1
Applications Information .............................................................. 12
General Description ......................................................................... 1
Maximum Power Dissipation ................................................... 12
Revision History ............................................................................... 2
Precision Full-Wave Rectifier ................................................... 12
Specifications..................................................................................... 3
10× Microphone Preamp Meets PC99 Specifications ........... 13
Electrical Characteristics............................................................. 3
Two-Element Varying Bridge Amplifier ................................. 13
Absolute Maximum Ratings............................................................ 7
Outline Dimensions ....................................................................... 14
Thermal Resistance ...................................................................... 7
Ordering Guide .......................................................................... 15
REVISION HISTORY
5/07—Rev. C to Rev. D
Changes to Features.......................................................................... 1
Changes to General Description .................................................... 1
Changes to Two-Element Bridge Amplifier Section.................. 13
Updated Outline Dimensions ....................................................... 14
2/03—Rev. B to Rev. C
Changed μSOIC to MSOP.................................................Universal
Changed SO-8 to R-8 .........................................................Universal
Changes to Precision Full-Wave Rectifier section ....................... 9
Changes to 10× Microphone Preamp Meets PC99
Specifications section................................................................... 9
Updated Outline Dimensions ....................................................... 12
Rev. D | Page 2 of 16
AD8519/AD8529
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VS = 5.0 V, V− = 0 V, VCM = 2.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
VOS
AD8519AKS, AD8519ART
−40°C ≤ TA ≤ +125°C
AD8519AR (R-8), AD8529
−40°C ≤ TA ≤ +125°C
Input Bias Current
IB
Input Offset Current
IOS
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
VCM
CMRR
AVO
Min
Typ
Max
Unit
600
800
600
1100
1300
1000
1100
300
400
±50
±100
4
μV
μV
μV
μV
nA
nA
nA
nA
V
dB
V/mV
V/mV
V/mV
μV/°C
pA/°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
Offset Voltage Drift
Bias Current Drift
OUTPUT CHARACTERISTICS
Output Voltage Swing High
Output Voltage Swing Low
Short-Circuit Current
Maximum Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
0 V ≤ VCM ≤ 4.0 V, −40°C ≤ TA ≤ +125°C
RL = 2 kΩ, 0.5 V < VOUT < 4.5 V
RL = 10 kΩ, 0.5 V < VOUT < 4.5 V
RL = 10 kΩ, −40°C ≤ TA ≤ +125°C
0
63
50
30
∆VOS/∆T
∆IB/∆T
VOH
VOL
ISC
IOUT
PSRR
100
30
100
2
500
IL = 250 μA
−40°C ≤ TA ≤ +125°C
IL = 5 mA
IL = 250 μA
−40°C ≤ TA ≤ +125°C
IL = 5 mA
Short to ground, instantaneous
4.90
4.80
V
V
80
200
±70
±25
mV
mV
mA
mA
VS = 2.7 V to 7 V
−40°C ≤ TA ≤ +125°C
VOUT = 2.5 V
−40°C ≤ TA ≤ +125°C
110
80
600
SR
tS
GBP
Φm
1 V < VOUT < 4 V, RL = 10 kΩ
To 0.01%
2.9
1200
8
60
V/μs
ns
MHz
Degrees
en p-p
en
in
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
0.5
10
0.4
μV p-p
nV/√Hz
pA/√Hz
ISY
Rev. D | Page 3 of 16
1200
1400
dB
dB
μA
μA
AD8519/AD8529
VS = 3.0 V, V− = 0 V, VCM = 1.5 V, TA = 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
VOS
AD8519AKS, AD8519ART
−40°C ≤ TA ≤ +125°C
AD8519AR (R-8), AD8529
−40°C ≤ TA ≤ +125°C
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
IB
IOS
VCM
CMRR
Large Signal Voltage Gain
AVO
OUTPUT CHARACTERISTICS
Output Voltage Swing High
VOH
Output Voltage Swing Low
VOL
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
Min
Typ
Max
Unit
700
900
700
1200
1400
1100
1200
300
±50
2
μV
μV
μV
μV
nA
nA
V
0
0 V ≤ VCM ≤ 2.0 V,
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ, 0.5 V < VOUT < 2.5 V
RL = 10 kΩ
55
20
75
20
30
dB
V/mV
V/mV
IL = 250 μA
IL = 5 mA
IL = 250 μA
IL = 5 mA
2.90
2.80
PSRR
ISY
VS = 2.5 V to 7 V, −40°C ≤ TA ≤ +125°C
VOUT = 1.5 V
−40°C ≤ TA ≤ +125°C
60
SR
tS
GBP
Φm
RL = 10 kΩ
To 0.01%
1.5
2000
6
55
V/μs
ns
MHz
Degrees
en
in
f = 1 kHz
f = 1 kHz
10
0.4
nV/√Hz
pA/√Hz
Rev. D | Page 4 of 16
80
600
100
200
V
V
mV
mV
1100
1300
dB
μA
μA
AD8519/AD8529
VS = 2.7 V, V− = 0 V, VCM = 1.35 V, TA = 25°C, unless otherwise noted.
Table 3.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Symbol
Conditions
VOS
AD8519AKS, AD8519ART
−40°C ≤ TA ≤ +125°C
AD8519AR (R-8), AD8529
−40°C ≤ TA ≤ +125°C
IB
IOS
VCM
CMRR
AVO
OUTPUT CHARACTERISTICS
Output Voltage Swing High
VOH
Output Voltage Swing Low
VOL
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
PSRR
ISY
0 V ≤ VCM ≤ 1.7 V, −40°C ≤ TA ≤ +125°C
RL = 2 kΩ, 0.5 V < VOUT < 2.2 V
RL = 10 kΩ
IL = 250 μA
IL = 5 mA
IL = 250 μA
IL = 5 mA
VS = 2.5 V to 7 V
−40°C ≤ TA ≤ +125°C
VOUT = 1.35 V
−40°C ≤ TA ≤ +125°C
Min
0
55
20
Typ
Max
Unit
700
900
700
1400
1600
1200
1300
300
±50
2
μV
μV
μV
μV
nA
nA
V
dB
V/mV
V/mV
75
20
30
2.60
2.50
60
80
600
100
200
V
V
mV
mV
1100
1300
dB
μA
μA
SR
tS
GBP
Φm
RL = 10 kΩ
To 0.01%
1.5
2000
6
55
V/μs
ns
MHz
Degrees
en
in
f = 1 kHz
f = 1 kHz
10
0.4
nV/√Hz
pA/√Hz
Rev. D | Page 5 of 16
AD8519/AD8529
VS = 5.0 V, V− = −5 V, VCM = 0 V, TA = 25°C, unless otherwise noted.
Table 4.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
VOS
AD8519AKS, AD8519ART
−40°C ≤ TA ≤ +125°C
AD8519AR (R-8), AD8529
−40°C ≤ TA ≤ +125°C
VCM = 0 V
VCM = 0 V, −40°C ≤ TA ≤ +125°C
VCM = 0 V
VCM = 0 V, −40°C ≤ TA ≤ +125°C
Input Bias Current
IB
Input Offset Current
IOS
Input Voltage Range
Common-Mode Rejection Ratio
VCM
CMRR
Large Signal Voltage Gain
AVO
Offset Voltage Drift
Bias Current Drift
OUTPUT CHARACTERISTICS
Output Voltage Swing High
Output Voltage Swing Low
Short-Circuit Current
Maximum Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Settling Time
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise Density
Current Noise Density
Min
VOL
ISC
IOUT
Max
Unit
600
800
600
1100
1300
1000
1100
300
400
±50
±100
+4
μV
μV
μV
μV
nA
nA
nA
nA
V
−5
−4.9 V ≤ VCM ≤ +4.0 V,
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ
RL = 10 kΩ
−40°C ≤ TA ≤ +125°C
70
50
25
∆VOS/∆T
∆IB/∆T
VOH
Typ
100
30
200
dB
V/mV
V/mV
V/mV
μV/°C
pA/°C
2
500
IL = 250 μA
−40°C ≤ TA ≤ +125°C
IL = 5 mA
IL = 250 μA
−40°C ≤ TA ≤ +125°C
IL = 5 mA
Short to ground, instantaneous
4.90
4.80
V
V
−4.90
−4.80
±70
±25
PSRR
ISY
VS = ±1.5 V to ±6 V, −40°C ≤ TA ≤ +125°C
VOUT = 0 V
−40°C ≤ TA ≤ +125°C
SR
tS
GBP
Φm
−4 V < VOUT < +4 V, RL = 10 kΩ
To 0.01%
2.9
1000
8
60
V/μs
ns
MHz
Degrees
en
in
f = 1 kHz
f = 1 kHz
10
0.4
nV/√Hz
pA/√Hz
Rev. D | Page 6 of 16
60
100
600
V
V
mA
mA
1200
1400
dB
μA
μA
AD8519/AD8529
ABSOLUTE MAXIMUM RATINGS
THERMAL RESISTANCE
Table 5.
Parameter
Supply Voltage
Input Voltage1
Differential Input Voltage2
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature Range
(Soldering, 60 sec)
Rating
±6 V
±6 V
±0.6 V
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
Table 6.
Package Type
5-Lead SC70 (KS)
5-Lead SOT-23 (RJ)
8-Lead SOIC (R)
8-Lead MSOP (RM)
1
1
For supply voltages less than ±6 V, the input voltage is limited to less than or
equal to the supply voltage.
2
For differential input voltages greater than ±0.6 V, the input current should
be limited to less than 5 mA to prevent degradation or destruction of the
input devices.
θJA1
376
230
158
210
θJC
126
146
43
45
Unit
°C/W
°C/W
°C/W
°C/W
θJA is specified for worst-case conditions, that is, θJA is specified for device
soldered in circuit board for SOT-23 and SOIC packages.
ESD CAUTION
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.
Rev. D | Page 7 of 16
AD8519/AD8529
TYPICAL PERFORMANCE CHARACTERISTICS
40
VS = 5V
TA = 25°C
COUNT = 395 OP AMPS
INPUT BIAS CURRENT (nA)
QUANTITY OF AMPLIFIERS
50
40
30
20
–40
–80
–120
–160
10
–200
01756-004
0
–1.0
VS = 5V
TA = 25°C
0
–0.6
–0.2
0.2
0.6
–240
1.0
0
1
INPUT OFFSET VOLTAGE (mV)
2
3
01756-007
60
5
4
COMMON-MODE VOLTAGE (V)
Figure 4. Input Offset Voltage Distribution
Figure 7. Input Bias Current vs. Common-Mode Voltage
120
600
500
60
40
0
2
4
6
8
10
20
12
0
1
SUPPLY VOLTAGE (V)
Figure 5. Supply Current per Amplifier vs. Supply Voltage
3
50
5
VS = 5V
TA = 25°C
40
VS = 5V
GAIN
OPEN-LOOP GAIN (dB)
700
4
Figure 8. Common-Mode Rejection vs. Common-Mode Voltage
800
600
VS = 10V
500
VS = 2.7V, 3.0V
45
30
90
20
PHASE
10
135
0
180
–10
225
–20
270
300
–50
–25
0
25
50
75
100
125
–30
100k
150
TEMPERATURE (°C)
1M
10M
FREQUENCY (Hz)
Figure 6. Supply Current per Amplifier vs. Temperature
Figure 9. Open-Loop Gain, Phase vs. Frequency
Rev. D | Page 8 of 16
100M
01756-009
400
01756-006
SUPPLY CURRENT (µA)
2
COMMON-MODE VOLTAGE (V)
PHASE SHIFT (Degrees)
450
80
01756-008
COMMON-MODE REJECTION (dB)
550
100
01756-005
SUPPLY CURRENT (µA)
VS = 5V
AD8519/AD8529
60
20
0
40
30
–OS
20
+OS
–20
100k
1M
10M
01756-013
10
01756-010
–40
10k
VS = 5V
VCM = 2.5V
RL = 10kΩ
TA = 25°C
VIN = ±50mV
50
OVERSHOOT (%)
40
CLOSED-LOOP GAIN (dB)
60
VS = 5V
RL = 830Ω
TA = 25°C
CL ≤ 5pF
0
10
100M
100
FREQUENCY (Hz)
Figure 10. Closed-Loop Gain vs. Frequency
Figure 13. Overshoot vs. Capacitance Load
4
110
VS = 5V
TA = 25°C
100
0.1%
STEP SIZE (V)
70
60
50
1
0
–1
0.1%
–2
40
1%
10k
100k
1M
01756-014
–3
01756-011
30
–4
0
10M
FREQUENCY (Hz)
Figure 14. Step Size vs. Settling Time
5
90
VS = 5V
AVCC = 1
RL = 10kΩ
TA = 25°C
CL = 15pF
VS = 5V
TA = 25°C
70
–PSRR
60
+PSRR
50
40
30
20
01756-012
10
10k
100k
1M
4
DISTORTION < 1%
3
2
1
0
10k
10M
FREQUENCY (Hz)
01756-015
MAXIMUM OUTPUT SWING (V p-p)
80
PSRR (dB)
2
1
SETTLING TIME (µs)
Figure 11. CMRR vs. Frequency
0
1k
1%
2
80
CMRR (dB)
VS = 5V
TA = 25°C
3
90
20
1k
1k
CAPACITANCE (pF)
100k
1M
FREQUENCY (Hz)
Figure 12. PSRR vs. Frequency
Figure 15. Output Swing vs. Frequency
Rev. D | Page 9 of 16
10M
AD8519/AD8529
300
VS = 5V
TA = 25°C
VS = ±2.5V
AV = 100kΩ
en = 0.4µV p-p
OUTPUT IMPEDANCE (Ω)
250
200
AVCC = 10
150
100
AVCC = 1
0
100k
1M
20mV
1s
01756-019
01756-016
50
10M
FREQUENCY (Hz)
Figure 16. Output Impedance vs. Frequency
Figure 19. 0.1 Hz to 10 Hz Noise
70
VS = 5V
TA = 25°C
VS = ±2.5V
VIN = 6V p-p
AV = 1
60
50
40
30
20
10
100
1k
20µs
01756-020
0
10
500ns
01756-021
01756-017
VOLTAGE NOISE DENSITY (nV/ Hz)
80
10k
1V
FREQUENCY (Hz)
Figure 17. Voltage Noise Density
Figure 20. No Phase Reversal
7
VS = 5V
TA = 25°C
VS = ±2.5V
AVCC = 1
TA = 25°C
CL = 100pF
RL = 10kΩ
6
5
4
3
2
1
0
10
01756-018
CURRENT NOISE DENSITY (pA/ Hz)
8
100
1k
10k
20mV
FREQUENCY (Hz)
Figure 21. Small Signal Transient Response
Figure 18. Current Noise Density
Rev. D | Page 10 of 16
AD8519/AD8529
500mV
50µs
01756-022
VS = ±2.5V
AVCC = 1
TA = 25°C
CL = 100pF
Figure 22. Large Signal Transient Response
Rev. D | Page 11 of 16
AD8519/AD8529
APPLICATIONS INFORMATION
R4
10kΩ
The maximum power that can be safely dissipated by the
AD8519/AD8529 is limited by the associated rise in junction
temperature. The maximum safe junction temperature is 150°C
for these plastic packages. If this maximum is momentarily
exceeded, proper circuit operation is restored as soon as the
die temperature is reduced. Operating the product in an
overheated condition for an extended period can result in
permanent damage to the device.
VIN
D1
1N914
The operation of the basic circuit (shown in Figure 23) should
be examined before considering the slew rate further. U1 is set
up to have two states of operation. D1 and D2 diodes switch the
output between the two states. State one is an inverter with a
gain of +1, and state two is a simple unity gain buffer where the
output is equal to the value of the virtual ground. The virtual
ground is the potential present at the noninverting node of the
U1. State one is active when VIN is larger than the virtual
ground. D2 is on in this condition. If VIN drops below virtual
ground, D2 turns off and D1 turns on. This causes the output of
U1 to simply buffer the virtual ground and this configuration is
state two. Therefore, the function of U1, which results from
these two states of operation, is a half-wave inverter. The U2
function takes the inverted half wave at a gain of two and sums
it into the original VIN wave, which outputs a rectified full wave.
VOUT = VIN − 2 V IN −1 < 0
This type of rectifier can be very precise if the following
electrical parameters are adhered to:
•
All passive components should be of tight tolerance, 1% for
resistors and 5% for capacitors.
If the application circuit requires high impedance (that is,
direct sensor interface), then an FET amplifier is a better
choice than the AD8519.
An amp such as the AD8519, which has a great slew rate
specification, yields the best result because the circuit
involves switching.
R3
4.99kΩ
D2
1N914
R5
10kΩ
R6
5kΩ
VOUT
U2
AD8519
AD8519
VIRTUAL GROUND =
Slew rate is probably the most underestimated parameter when
designing a precision rectifier. Yet without a good slew rate,
large glitches are generated during the period when both diodes
are off.
•
NODE A
U1
PRECISION FULL-WAVE RECTIFIER
•
R2
10kΩ
R1
10kΩ
R7
3.32kΩ
VCC
2
01756-023
MAXIMUM POWER DISSIPATION
Figure 23. Precision Full-Wave Rectifier
Switching glitches are caused when D1 and D2 are both
momentarily off. This condition occurs every time the input
signal is equal to the virtual ground potential. When this
condition occurs, the U1 stage is taken out of the VOUT equation
and VOUT is equal to VIN × R5 × (R4 || R1 + R2 + R3). Note that
Node A should be VIN inverted or virtual ground, but in this
condition, Node A is simply tracking VIN. Given a sine wave
input centered around virtual ground, glitches are generated
at the sharp negative peaks of the rectified sine wave. If the
glitches are hard to notice on an oscilloscope, raise the frequency of the sine wave until they become apparent. The size
of the glitches is proportional to the input frequency, the diode
turn-on potential (0.2 V or 0.65 V), and the slew rate of the op amp.
R6 and R7 are both necessary to limit the amount of bias
current related voltage offset. Unfortunately, there is no perfect
value for R6 because the impedance at the inverting node is
altered as D1 and D2 switch. Therefore, there is also some
unresolved bias current related offset. To minimize this offset,
use lower value resistors or choose an FET amplifier if the
optimized offset is still intolerable.
The AD8519 offers a unique combination of speed vs. power
ratio at 2.7 V single supply, small size (SC70 and SOT-23), and low
noise that makes it an ideal choice for most high volume and
high precision rectifier circuits.
Rev. D | Page 12 of 16
AD8519/AD8529
TWO-ELEMENT VARYING BRIDGE AMPLIFIER
10× MICROPHONE PREAMP MEETS PC99
SPECIFICATIONS
This circuit, while lacking a unique topology, is anything but
featureless when an AD8519 is used as the op amp. This preamp
gives 20 dB gain over a frequency range of 20 Hz to 20 kHz and
is fully PC99 compliant in all parameters including THD + N,
dynamic range, frequency range, amplitude range, and crosstalk.
Not only does this preamp comply with the PC99 specifications,
it far surpasses them. In fact, when the input noise is 120 dB,
this preamp has a VOUT noise of around 100 dB, which is suitable for most professional 20-bit audio systems. At 120 dB THD
+ N in unity gain, the AD8519 is suitable for 24-bit professional
audio systems. In other words, the AD8519 will not be the
limiting performance factor in audio systems despite its small
size and low cost.
Slew rate related distortion is not present at the lower voltages
because the AD8519 is so fast at 2.1 V/μs. A general rule of
thumb for determining the necessary slew rate for an audio
system is to take the maximum output voltage range of the
device, given the design’s power rails, and divide by two. In
Figure 24, the power rails are 2.7 V and the output is rail-to-rail.
Enter these numbers into the equation: 2.7/2 = 1.35 V, and the
minimum ideal slew rate is 1.35 V/μs.
There are a host of bridge configurations available to designers.
For a complete analysis, look at the ubiquitous bridge and its
different forms. Refer to the 1992 Amplifier Applications Guide 1 .
Figure 25 is a schematic of a two-element varying bridge. This
configuration is commonly found in pressure and flow transducers. With a two-element varying bridge, the signal is 2× as
compared to a single-element varying bridge. The advantages
of this type of bridge are gain setting range and single-supply
application. Negative characteristics are nonlinear operation
and required R matching. Given these sets of conditions,
requirements, and characteristics, the AD8519 can be successfully
used in this configuration because of its rail-to-rail output and
low offset. Perhaps the greatest benefits of the AD8519, when
used in the bridge configuration, are the advantages it can bring
when placed in a remote bridge sensor. For example, the tiny
SC70 and SOT-23 packages reduce the overall sensor size; low
power allows for remote powering via batteries or solar cells,
high output current drive to drive a long cable; and 2.7 V
operation for two-cell operation.
2.7V
RF
C1
1µF
MIC
IN
1
30.9kΩ
2.7V
CODEC LINE IN
OR MIC IN
3.09kΩ
1nF
NPO
AD8519
46.4kΩ
93.1kΩ
R
AD8519
RF
Adolfo Garcia and James Wong, Chapter 2, 1992, Amplifier Applications Guide.
48kΩ
2.7V
10µF ELECT
01756-024
1kΩ
R
Figure 25. Two-Element Varying Bridge Amplifier
240pF
2.7V
R
01756-025
While this data sheet gives only one audio example, many audio
circuits are enhanced with the use of the AD8519. Examples
include: active audio filters such as bass, treble, and equalizers;
PWM filters at the output of audio DACs; buffers and summers
for mixing stations; and gain stages for volume control.
R
Figure 24. 10× Microphone Preamplifier
Rev. D | Page 13 of 16
AD8519/AD8529
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
5
1
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
6.20 (0.2441)
5.80 (0.2284)
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
SEATING
PLANE
8
3.20
3.00
2.80
0.50 (0.0196)
0.25 (0.0099)
5.15
4.90
4.65
5
1
4
45°
PIN 1
8°
0°
0.65 BSC
0.25 (0.0098)
0.17 (0.0067)
0.95
0.85
0.75
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-A A
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
1.10 MAX
0.15
0.00
0.38
0.22
0.80
0.60
0.40
8°
0°
0.23
0.08
COPLANARITY
0.10
012407-A
8
4.00 (0.1574)
3.80 (0.1497)
3.20
3.00
2.80
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 26. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
Figure 27. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
2.20
2.00
1.80
1.35
1.25
1.15
5
1
2.90 BSC
4
2
3
PIN 1
1.10
0.80
0.30
0.15
SEATING
PLANE
4
2.80 BSC
1.60 BSC
1
2
3
PIN 1
0.65 BSC
1.00
0.90
0.70
0.10 MAX
5
2.40
2.10
1.80
0.95 BSC
0.40
0.10
0.22
0.08
0.46
0.36
0.26
0.10 COPLANARITY
1.90
BSC
1.30
1.15
0.90
1.45 MAX
0.15 MAX
COMPLIANT TO JEDEC STANDARDS MO-203-AA
0.50
0.30
SEATING
PLANE
0.22
0.08
10°
5°
0°
COMPLIANT TO JEDEC STANDARDS MO-178-A A
Figure 28. 5-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-5)
Dimensions shown in millimeters
Rev. D | Page 14 of 16
Figure 29. 5-Lead Small Outline Transistor Package [SOT-23]
(RJ-5)
Dimensions shown in millimeters
0.60
0.45
0.30
AD8519/AD8529
ORDERING GUIDE
Model
AD8519AKS-REEL7
AD8519AKSZ-REEL7 1
AD8519ART-REEL
AD8519ART-REEL7
AD8519ARTZ-REEL1
AD8519ARTZ-REEL71
AD8519AR
AD8519AR-REEL
AD8519AR-REEL7
AD8519ARZ1
AD8519ARZ-REEL
AD8519ARZ-REEL71
AD8529AR
AD8529AR-REEL
AD8529ARZ1
AD8529ARZ-REEL1
AD8529ARM-REEL
AD8529ARMZ-REEL1
1
Temperature
Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
Package Description
5-Lead SC70
5-Lead SC70
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
5-Lead SOT-23
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead MSOP
8-Lead MSOP
Z = RoHS compliant part, # denotes RoHS compliant part may be top or bottom marked.
Rev. D | Page 15 of 16
Package Option
KS-5
KS-5
RJ-5
RJ-5
RJ-5
RJ-5
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
R-8
RM-8
RM-8
Branding Information
A3B
A11
A3A
A3A
A3A#
A3A#
A5A
A5A#
AD8519/AD8529
NOTES
©1998–2007 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
C01756–0–5/07(D)
Rev. D | Page 16 of 16
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