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AD8616AR-AD8616ARZ-AD8616ARZ-REEL7-AD8618AR-AD8618ARU-AD8618ARUZ-AD8618ARUZ-REEL-AD8618ARZ
Precision 20 MHz CMOS Dual Rail-to-Rail Operational Amplifier
Precision 20 MHz CMOS Rail-to-Rail
Input/Output Operational Amplifiers
Rev. A
FEATURES
Low offset voltage: 65 µV max
Single-supply operation: 2.7 V to 5.5 V
Low noise: 8 nV/√Hz
Wide bandwidth: >20 MHz
Slew rate: 12 V/µs
High output current: 150 mA
No phase reversal
Low input bias current: 1 pA
Low supply current: 2 mA
Unity gain stable
APPLICATIONS
Barcode scanners
Battery-powered instrumentation
Multipole filters
Sensors
ASIC input or output amplifier
Audio
Photodiode amplification
PIN CONFIGURATIONS
OUT A
–INA
+IN A
OUT B
–INB
+IN B04648-0-001
Figure 1. 8-Lead MSOP (RM-8)
OUT A
–INA
+IN A
OUT B
–INB
+IN B04648-0-002
Figure 2. 8-Lead SOIC (R-8)
OUT A
–IN A
+IN AV+
+IN B–IN B
OUT B04648-0-048
Figure 3. 14-Lead TSSOP (RU-14)
–IN A
+IN A
+IN B
–IN B
OUT B
OUT A04648-0-049
Figure 4. 14-Lead SOIC (R-14)
GENERAL DESCRIPTION The AD8616/AD8618 are dual/quad, rail-to-rail, input and
output, single-supply amplifiers featuring very low offset
voltage, wide signal bandwidth, and low input voltage and
current noise. The parts use a patented trimming technique that
achieves superior precision without laser trimming. The
AD8616/AD8618 are fully specified to operate from 2.7 V to
5 V single supplies.
The combination of 20 MHz bandwidth, low offset, low noise,
and very low input bias current make these amplifiers useful in
a wide variety of applications. Filters, integrators, photodiode
amplifiers, and high impedance sensors all benefit from the
combination of performance features. AC applications benefit
from the wide bandwidth and low distortion. The AD8616/
AD8618 offer the highest output drive capability of the
DigiTrimTM family, which is excellent for audio line drivers and
other low impedance applications.
Applications for the parts include portable and low powered
instrumentation, audio amplification for portable devices,
portable phone headsets, bar code scanners, and multipole
filters. The ability to swing rail to rail at both the input and
output enables designers to buffer CMOS ADCs, DACs, ASICs,
and other wide output swing devices in single-supply systems.
The AD8616/AD8618 are specified over the extended industrial
(–40°C to +125°C) temperature range. The AD8616 is available
in 8-lead MSOP and narrow SOIC surface mount packages; the
MSOP version is available in tape and reel only. The AD8618 is
available in 14-lead SOIC and 14-lead TSSOP packages.
TABLE OF CONTENTS Specifications.....................................................................................3
VS = 5 V..........................................................................................3
VS = 2.7 V.......................................................................................4
Absolute Maximum Ratings............................................................5
Thermal Resistance......................................................................5
ESD Caution..................................................................................5
Typical Performance Characteristics.............................................6
Applications.....................................................................................12
Input Overvoltage Protection...................................................12
Output Phase Reversal...............................................................12
Driving Capacitive Loads..........................................................12
Overload Recovery Time..........................................................13
D/A Conversion.........................................................................13
Low Noise Applications.............................................................13
High Speed Photodiode Preamplifier......................................14
Active Filters...............................................................................14
Power Dissipation......................................................................14
Power Calculations for Varying or Unknown Loads.............15
Outline Dimensions.......................................................................16
Ordering Guide..........................................................................16
REVISION HISTORY
4/04—Data Sheet Changed from Rev. 0 to Rev. A Added AD8618................................................................Universal
Updated Outline Dimensions...................................................16
1/04—Revision 0: Initial Version SPECIFICATIONS
VS = 5 V @VCM = VS/2, TA = 25°C, unless otherwise noted.
Table 1. VS = 2.7 V @VCM = VS /2, TA = 25°C, unless otherwise noted.
Table 2. ABSOLUTE MAXIMUM RATINGS
Table 3. AD8616/AD8618 Stress Ratings 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.
THERMAL RESISTANCE θJA is specified for the worst-case conditions, i.e., θJA is specified
for device soldered in circuit board for surface-mount packages.
Table 4.
ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
TYPICAL PERFORMANCE CHARACTERISTICS
NUMBE
R OF AMP
IFIE
OFFSET VOLTAGE (µV)Figure 5. Input Offset Voltage Distribution
NUMBE
R O
AMP
IFIE4681012
TCVOS (µV/°C)04648-0-004
Figure 6. Offset Voltage Drift Distribution
T OFFSET VOLTA
GE (0.51.01.52.02.53.03.54.04.55.0
COMMON-MODE VOLTAGE (V)04648-0-005
INP
T BIAS
CURRE
NT (255075100125
TEMPERATURE (°C)04648-0-006
Figure 8. Input Bias Current vs. Temperature
– V
OUT
(mV
LOAD CURRENT (mA)04648-0-007
Figure 9. Output Voltage to Supply Rail vs. Load Current
OUTPUT VOLTAGE (mV)
TEMPERATURE (°C)04648-0-008
IN (
SE (
egrees)10k100k1M10M100M
FREQUENCY (Hz)04648-0-009
Figure 11. Open-Loop Gain and Phase vs. Frequency
OUTPUT SW
ING (V p-p)
FREQUENCY (Hz)
10k1k100k1M10M04648-0-010
Figure 12. Closed-Loop Output Voltage Swing
OUTPUT IMPE
DANCE10k100k1M10M100M
FREQUENCY (Hz)04648-0-011
Figure 13. Output Impedance vs. Frequency
CMRR (
FREQUENCY (Hz)
10k1k100k1M10MD8616-0-012
Figure 14. Common-Mode Rejection Ratio vs. Frequency
RR (dB)
FREQUENCY (Hz)
10k1k100k1M10M04648-0-013
Figure 15. PSRR vs. Frequency
L SIGN
OVER
OOT
CAPACITANCE (pF)1001000Figure 16. Small-Signal Overshoot vs. Load Capacitance
CURRE
NT P
AMP
IFIE
R (
TEMPERATURE (°C)04648-0-015
Figure 17. Supply Current vs. Temperature
CURRE
NT P
AMP
IFIE
R (0.51.01.52.02.53.03.54.04.55.0
SUPPLY VOLTAGE (V)04648-0-016
Figure 18. Supply Current vs. Supply Voltage
VOLTA
GE N
ISE D
ITY (
FREQUENCY (kHz)04648-0-017
Figure 19. Voltage Noise Density vs. Frequency
VOLTA
GE N
ISE D
ITY (
FREQUENCY (kHz)
Figure 20. Voltage Noise Density vs. Frequency
VOLTA
GE (
50mV/D
IV)
TIME (1µs/DIV)04648-0-019
Figure 21. Small-Signal Transient Response
E (
500mV/D
IV)
TIME (1µs/DIV)04648-0-020
Figure 22. Large-Signal Transient Response
