AD627AR Analog Devices Inc, AD627AR Datasheet
AD627AR
Specifications of AD627AR
Available stocks
Related parts for AD627AR
AD627AR Summary of contents
Page 1
FEATURES Micropower, 85 μA maximum supply current Wide power supply range (+2 ±18 V) Easy to use Gain set with one external resistor Gain range 5 (no resistor) to 1000 Higher performance than discrete designs Rail-to-rail output swing ...
Page 2
AD627 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Single Supply ................................................................................. 3 Dual Supply ................................................................................... 5 Dual and Single Supplies ............................................................. 6 Absolute Maximum ...
Page 3
SPECIFICATIONS SINGLE SUPPLY Typical @ 25°C single supply and 5 V, and R S Table 1. Parameter Conditions GAIN (200 kΩ/R Gain Range 1 Gain Error V = (− 0.1 ...
Page 4
AD627 Parameter Conditions DYNAMIC RESPONSE Small Signal −3 dB Bandwidth +100 G = +1000 Slew Rate Settling Time to 0.01 1.5 V output step +100 ...
Page 5
DUAL SUPPLY Typical @ 25°C dual supply ±5 V and ±15 V, and R S Table 2. Parameter Conditions GAIN (200 kΩ/R Gain Range 1 Gain Error V = (−V OUT (+V ) − ...
Page 6
AD627 Parameter Conditions DYNAMIC RESPONSE Small Signal −3 dB Bandwidth +100 G = +1000 Slew Rate Settling Time to 0.01 ± output step +100 ...
Page 7
ABSOLUTE MAXIMUM RATINGS Table 4. Parameter Supply Voltage 1 Internal Power Dissipation PDIP (N-8) SOIC_N (R-8) −IN, +IN Common-Mode Input Voltage Differential Input Voltage (+IN − (−IN)) Output Short-Circuit Duration Storage Temperature Range (N, R) Operating Temperature Range Lead Temperature ...
Page 8
AD627 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD627 – TOP VIEW +IN OUTPUT 3 6 (Not to Scale) –V REF Figure 3. 8-Lead PDIP Pin Configuration Table 5. Pin Function ...
Page 9
TYPICAL PERFORMANCE CHARACTERISTICS At 25° ± kΩ, unless otherwise noted 100 GAIN = + GAIN = +1000 100 1k FREQUENCY ...
Page 10
AD627 500mV 100 10 Figure 11. 0 Current Noise (0.71 pA/DIV) 20mV 100 10 Figure 12. 0 RTI Voltage Noise (400 nV/DIV 100 10 Figure 13. 0.1 Hz ...
Page 11
GAIN (V/V) Figure 17. Settling Time to 0.01% vs. Gain for Step at Output 100 pF ± 1mV 1V Figure 18. Large Signal ...
Page 12
AD627 120 110 100 100 1k FREQUENCY (Hz) Figure 23. CMRR vs. Frequency, ± +1000 +100 ...
Page 13
V OUT 0.5V/DIV Figure 29. Gain Nonlinearity, Negative Input ±2 ppm/DIV) S 40µV/DIV V OUT 0.5V/DIV Figure 30. Gain Nonlinearity, Negative Input ±2 +100 (8 ppm/DIV) S ...
Page 14
AD627 THEORY OF OPERATION The AD627 is a true instrumentation amplifier, built using two feedback loops. Its general properties are similar to those of the classic two-op-amp instrumentation amplifier configuration but internally the details are somewhat different. The AD627 uses ...
Page 15
USING THE AD627 BASIC CONNECTIONS Figure 36 shows the basic connection circuit for the AD627. The +V and −V terminals connect to the power supply. The S S supply can be either bipolar (V = ±1 ±18 V) ...
Page 16
AD627 Table 6. Recommended Values of Gain Resistors 1% Standard Table Desired Gain Value ∞ 6 200 kΩ 7 100 kΩ 8 68.1 kΩ 9 51.1 kΩ 10 40.2 kΩ kΩ 20 13.7 kΩ ...
Page 17
Table 7. Maximum Gain for Low Common-Mode, Single-Supply Applications V REF Pin IN ±100 mV ±50 mV ±10 mV ...
Page 18
AD627 MAKE vs. BUY: A TYPICAL APPLICATION ERROR BUDGET The example in Figure 41 serves as a good comparison between the errors associated with an integrated and a discrete in-amp implementation. A ±100 mV signal from a resistive bridge (common-mode ...
Page 19
ERRORS DUE TO AC CMRR In Table 9, the error due to common-mode rejection results from the common-mode voltage from the bridge 2.5 V. The ac error due to less than ideal common-mode rejection cannot be calculated without knowing the ...
Page 20
AD627 LAYOUT AND GROUNDING The use of ground planes is recommended to minimize the impedance of ground returns (and hence, the size of dc errors). To isolate low level analog signals from a noisy digital environment, many data acquisition components ...
Page 21
INPUT PROTECTION As shown in the simplified schematic (see Figure 35), both the inverting and noninverting inputs are clamped to the positive and negative supplies by ESD diodes. In addition kΩ series resistor on each input provides current ...
Page 22
AD627 APPLICATIONS CIRCUITS CLASSIC BRIDGE CIRCUIT Figure 50 shows the AD627 configured to amplify the signal from a classic resistive bridge. This circuit works in dual-supply mode or single-supply mode. Typically, the same voltage that powers the instrumentation amplifiers excites ...
Page 23
LINE 4–20mA TRANSDUCER IMPEDANCE 5V 0.1µF AIN 0 AD627 AD627 24.9Ω AIN 7 REF Figure 52 Receiver Circuit Rev Page AD627 5V 5V 0.1µF 0.1µF V ...
Page 24
... AD627AR −40°C to +85°C AD627AR-REEL −40°C to +85°C AD627AR-REEL7 −40°C to +85°C 1 AD627ARZ −40°C to +85°C 1 AD627ARZ-R7 −40°C to +85°C 1 AD627ARZ-RL −40°C to +85°C AD627BN −40°C to +85°C 1 AD627BNZ −40°C to +85°C AD627BR − ...