AD8226ARZ Analog Devices Inc, AD8226ARZ Datasheet
AD8226ARZ
Specifications of AD8226ARZ
Available stocks
Related parts for AD8226ARZ
AD8226ARZ Summary of contents
Page 1
FEATURES Gain set with 1 external resistor Gain range 1000 Input voltage goes below ground Inputs protected beyond supplies Very wide power supply range Single supply: 2 Dual supplies: ±1. ±18 V ...
Page 2
AD8226 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Pin Configuration ............................................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 7 Thermal Resistance ...................................................................... 7 ESD Caution .................................................................................. 7 Pin Configuration ...
Page 3
SPECIFICATIONS +V = +15 V, −V = − REF Table 2. Parameter COMMON-MODE REJECTION RATIO (CMRR) CMRR with 100 G ...
Page 4
AD8226 Parameter Settling Time 0.01 100 G = 1000 Slew Rate GAIN Gain Range Gain Error 1000 Gain Nonlinearity ...
Page 5
V, − 25° REF A Table 3. Parameter COMMON-MODE REJECTION RATIO (CMRR) CMRR with ...
Page 6
AD8226 Parameter Settling Time 0.01 100 G = 1000 Slew Rate GAIN Gain Range Gain Error 1000 2 Gain vs. Temperature ...
Page 7
ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage Output Short-Circuit Current Maximum Voltage at −IN or +IN Minimum Voltage at −IN or +IN REF Voltage Storage Temperature Range Specified Temperature Range Maximum Junction Temperature ESD Human Body Model Charge Device ...
Page 8
AD8226 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 −IN Negative Input Gain-Setting Pins. Place a gain resistor between these two pins +IN Positive Input. 5 −V Negative ...
Page 9
TYPICAL PERFORMANCE CHARACTERISTICS T = 25° ± kΩ, unless otherwise noted 160 140 120 100 –900 –600 –300 0 300 V @ ±15V (µV) OSO Figure 3. ...
Page 10
AD8226 2.5 +0.02V, +2.0V +1.35V, +1.9V 2.0 1.5 +0.02V, +1.3V 1 +2.4V, +0.8V REF 0.5 +0.02V, +0.3V 0 –0.5 +1.35V, –0.4V +0.02V, –0.4V –1.0 –0.5 0 0.5 1.0 1.5 OUTPUT VOLTAGE (V) Figure 9. Input Common-Mode Voltage ...
Page 11
V = ±12V S –5 +11.95V, –6.4V –11.95V, –6.4V –10 0V, –12.4V –14.96V, –7.9V –15 0V, –15.4V –20 –20 –15 –10 – OUTPUT ...
Page 12
AD8226 –0.15V –0.5 0 0.5 1.0 1.5 2.0 2.5 COMMON-MODE VOLTAGE (V) Figure 21. Input Bias Current vs. Common-Mode Voltage –15.13V 45 40 ...
Page 13
GAIN = 1000 140 GAIN = 100 GAIN = 10 120 GAIN = 1 100 0 100 1k FREQUENCY (Hz) Figure 27. CMRR vs. Frequency, RTI 120 GAIN = 100 GAIN = ...
Page 14
AD8226 +V S –40°C +25°C +85°C –0.2 –0.4 –0.6 –0.8 –V S –0.2 –0.4 –0.6 –0 SUPPLY VOLTAGE (±V Figure 33. Input Voltage Limit vs. Supply Voltage +V S –0.1 –0.2 –40°C +25°C –0.3 ...
Page 15
–2 –4 –6 –8 –10 –8 –6 –4 – OUTPUT VOLTAGE (V) Figure 39. Gain Nonlinearity 10 100 ...
Page 16
AD8226 1.5pA/DIV Figure 45. 0 Current Noise ±15V + 100 1k 10k FREQUENCY (Hz) Figure 46. Large-Signal Frequency Response ...
Page 17
Figure 51. Small-Signal Response kΩ 20mV/DIV Figure 52. Small-Signal Response 10 kΩ 4µs/DIV 20mV/DIV Figure 53. Small-Signal Response 100 100 ...
Page 18
AD8226 NO LOAD R = 47pF 100pF 147pF L 20mV/DIV Figure 55. Small-Signal Response with Various Capacitive Loads ∞ SETTLED TO 0.001% 20 SETTLED ...
Page 19
THEORY OF OPERATION NODE 3 ESD AND +IN OVERVOLTAGE Q1 PROTECTION R B ARCHITECTURE The AD8226 is based on the classic 3-op-amp topology. This topology has two stages: a preamplifier to provide differential amplification, followed by a difference amplifier to ...
Page 20
AD8226 REFERENCE TERMINAL The output voltage of the AD8226 is developed with respect to the potential on the reference terminal. This is useful when the output signal needs to be offset to a precise midsupply level. For example, a voltage ...
Page 21
Common-Mode Rejection Ratio Over Frequency Poor layout can cause some of the common-mode signals to be converted to differential signals before reaching the in-amp. Such conversions occur when one input path has a frequency response that is different from the ...
Page 22
AD8226 INPUT PROTECTION The AD8226 has very robust inputs and typically does not need additional input protection. Input voltages can from the opposite supply rail. For example, with positive supply and a ...
Page 23
APPLICATIONS INFORMATION DIFFERENTIAL DRIVE +IN AD8226 –IN REF R – OP AMP R RECOMMENDED OP AMPS: AD8515, AD8641, AD820. RECOMMENDED R VALUES: 5kΩ to 20kΩ. Figure 64. Differential Output Using an Op Amp Figure 64 shows how to configure the ...
Page 24
AD8226 PRECISION STRAIN GAGE The low offset and high CMRR over frequency of the AD8226 make it an excellent candidate for performing bridge measure- ments. The bridge can be connected directly to the inputs of the amplifier (see Figure 65). ...
Page 25
... AD8226ARMZ-RL −40°C to +125°C AD8226ARMZ-R7 1 −40°C to +125°C 1 AD8226ARZ −40°C to +125°C 1 AD8226ARZ-RL −40°C to +125°C 1 AD8226ARZ-R7 −40°C to +125°C 1 AD8226BRMZ −40°C to +125°C 1 AD8226BRMZ-RL −40°C to +125°C 1 AD8226BRMZ-R7 −40°C to +125°C 1 AD8226BRZ − ...
Page 26
AD8226 NOTES Rev Page ...
Page 27
NOTES Rev Page AD8226 ...
Page 28
AD8226 NOTES ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07036-0-7/09(A) Rev Page ...