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AD8603AUJZ-R2-AD8603AUJZ-REEL-AD8603AUJZ-REEL7-AD8607ARZ-AD8607ARZ-REEL7-AD8609ARUZ-AD8609ARZ-AD8609ARZ-REEL-AD8609ARZ-REEL7
Precision Single MicroPower Rail to Rail Input/Output Low Noise CMOS Operational Amplifier
Precision Micropower Low Noise CMOS Rail-
to-Rail Input/Output Operational Amplifiers
FEATURES
Low offset voltage: 50 µV max
Low input bias current: 1 pA max
Single-supply operation: 1.8 V to 5 V
Low noise: 22 nV/√Hz
Micropower: 50 µA max
Low distortion
No phase reversal
Unity gain stable
APPLICATIONS
Battery-powered instrumentation
Multipole filters
Sensors
Low power ASIC input or output amplifiers
GENERAL DESCRIPTION The AD8603/AD8607/AD8609 are, single/dual/quad micro-
power rail-to-rail input and output amplifiers, respectively, that
features very low offset voltage as well as low input voltage and
current noise.
These amplifiers use a patented trimming technique that
achieves superior precision without laser trimming. The parts
are fully specified to operate from 1.8 V to 5.0 V single supply
or from ±0.9 V to ±2.5 V dual supply. The combination of low
offsets, low noise, very low input bias currents, and low power
consumption make the AD8603/AD8607/AD8609 especially
useful in portable and loop-powered instrumentation.
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 low power single-supply
systems.
The AD8603 is available in a tiny 5-lead TSOT-23 package. The
AD8607 is available in 8-lead MSOP and SOIC packages. The
AD8609 is available in 14-lead TSSOP and SOIC packages.
PIN CONFIGURATIONS
AD8603
TOP VIEW
(Not to Scale)
OUT
+IN
–IN
04356-0-001 Figure 1. 5-Lead TSOT-23 (UJ Suffix)
04356-0-045 Figure 2. 8-Lead MSOP (RM Suffix)
04356-0-047 Figure 3. 8-Lead SOIC (R Suffix)
04356-0-044 Figure 4. 14-Lead TSSOP (RU Suffix)
04356-0-046Figure 5. 14-Lead SOIC (R Suffix)
Rev.A
TABLE OF CONTENTS Specifications.....................................................................................3
Absolute Maximum Ratings............................................................5
Typical Performance Characteristics.............................................6
Applications.....................................................................................12
No Phase Reversal......................................................................12
Input Overvoltage Protection...................................................12
Driving Capacitive Loads..........................................................12
Proximity Sensors.......................................................................13
Composite Amplifiers................................................................13
Battery-Powered Applications..................................................14
Photodiodes................................................................................14
Outline Dimensions.......................................................................15
Ordering Guide..........................................................................16
REVISION HISTORY
10/03—Data Sheet Changed from Rev. 0 to Rev. A
Change Page Added AD8607 and AD8609 parts..............................Universal
Changes to Specifications............................................................3
Changes to Figure 35..................................................................10
Added Figure 41..........................................................................11
SPECIFICATIONS
Table 1. Electrical Characteristics @ VS = 5 V, VCM = VS/2, TA = 25°C, unless otherwise noted
Table 2. Electrical Characteristics @ VS = 1.8 V, VCM = VS/2, TA = 25°C, unless otherwise noted ABSOLUTE MAXIMUM RATINGS
Table 3. AD8603/AD8607/AD8609 Stress Ratings1, 2
Table 4. Package Characteristics 1 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 listed
in the operational sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device
reliability.
2 Absolute maximum ratings apply at 25°C, unless otherwise noted. θJA is specified for the worst-case conditions, i.e., θJA is specified for device
soldered in circuit board for surface-mount packages.
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 these parts feature
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
VOS (µV)
NUMBE
R OF AMP
IFIE
2600Figure 6. Input Offset Voltage Distribution
TCVOS (µV/°C)
NUMBE
OF AMP
IFIE0
04356-0-003Figure 7. Input Offset Voltage Drift Distribution
VCM (V)
04356-0-004Figure 8. Input Offset Voltage vs. Common-Mode Voltage
VCM(V)
VCM (V) Figure 9. Input Offset Voltage vs. Common-Mode Voltage
TEMPERATURE (°C)
INP
T BIAS
CURRE
NT (pA)
04356-0-006Figure 10. Input Bias vs. Temperature
LOAD CURRENT (mA)
TPU
VOLTA
GE TO SU
PPLY R
IL (
04356-0-007Figure 11. Output Voltage to Supply Rail vs. Load Current
TEMPERATURE (°C)
OUTPUT SW
ING (
04356-0-008Figure 12. Output Voltage Swing vs. Temperature
04356-0-01010k100k1M10M
FREQUENCY (Hz)
SE (
egree)
OPEN-
OOP GAIN (
–225Figure 13. Open-Loop Gain and Phase vs. Frequency
FREQUENCY (kHz)
OUTPUT SW
ING (
p-
04356-0-011Figure 14. Closed-Loop Output Voltage Swing vs. Frequency
FREQUENCY (Hz)
OUTP
UT IMP
DANCE
1925100k
10kFigure 15. Output Impedance vs. Frequency
FREQUENCY (Hz)
CMRR (dB)
14010k
100kFigure 16. Common-Mode Rejection Ratio vs. Frequency
1001k10k100k
FREQUENCY (Hz)
RR (dB)
100Figure 17. PSRR vs. Frequency
LOAD CAPACITANCE (pF)
LL SIGN
OVER
OOT (
04356-0-015Figure 18. Small Signal Overshoot vs. Load Capacitance
TEMPERATURE (°C)
CURRE
NT (
04356-0-016Figure 19. Supply Current vs. Temperature
SUPPLY VOLTAGE (V)
CURRE
NT (
04356-0-017Figure 20. Supply Current vs. Supply Voltage
TIME (1s/DIV)
VOLTAGE NOISE (
V/D
IV)Figure 21. 0.1 Hz to 10 Hz Input Voltage Noise
TIME (4µs/DIV)
VOLTA
GE (
50mV/D
IV)Figure 22. Small Signal Transient
TIME (20µs/DIV)
VOLTA
GE (
V/D
IV)Figure 23. Large Signal Transient
