Datasheet AD626 (Analog Devices)

Low Cost, Single-Supply Differential Amplifi er AD626 FEATURES CONNECTION DIAGRAM Pin Selectable Gains of 10 and 100 8-Lead Plastic Mini-DIP (N) True Single-Supply Operation and SOIC (R) Packages Single-Supply Range of +2.4 V to +10 V Dual-Supply Range of
ⴞ
1.2 V to
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6 V 200k
⍀
200k
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Wide Output Voltage Range of 30 mV to 4.7 V –IN 1 8 +IN Optional Low-Pass Filtering 1/6 Excellent DC Performance ANALOG 2 7 G = 100 GND G = 30 Low Input Offset Voltage: 500
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V Max Large Common-Mode Range: 0 V to +54 V –V 3 6 S +VS Low Power: 1.2 mW (VS = +5 V) 100k
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Good CMR of 90 dB Typ FILTER 4 G = 2 5 OUT AC Performance AD626 Fast Settling Time: 24
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s (0.01%) Includes Input Protection Series Resistive Inputs (RIN = 200 k
⍀
)
range of this amplifi er is equal to 6 (+VS – 1 V) which pro vides a
RFI Filters Included
+24 V CMR while operating from a +5 V sup ply. Fur ther more,
Allows 50 V Continuous Overload
the AD626 features a CMR of 90 dB typ.
APPLICATIONS
The amplifi er’s inputs are protected against continuous overload of
Current Sensing
up to 50 V, and RFI fi lters are included in the attenuator network.
Interface for Pressure Transducers, Position Indicators,
The output range is +0.03 V to +4.9 V using a +5 V sup ply. The
Strain Gages, and Other Low Level Signal Sources
amplifi er provides a preset gain of 10, but gains be tween 10 and 100 can be easily con fi g ured with an external re sis tor. Fur ther -
PROD UCT DE SCRIP TION
more, a gain of 100 is available by connecting the G = 100 pin to The AD626 is a low cost, true sin gle-sup ply dif fer en tial am pli fi er analog ground. The AD626 also offers low-pass fi lter capability by de signed for am pli fy ing and low-pass fi ltering small dif fer en tial connecting a ca pac i tor between the fi lter pin and analog ground. voltages from sources having a large common-mode voltage. The AD626A and AD626B operate over the industrial tem per a ture The AD626 can operate from either a single supply of +2.4 V to range of –40°C to +85°C. The AD626 is available in two 8-lead +10 V, or dual supplies of ±1.2 V to ±6 V. The input common-mode packages: a plastic mini-DIP and SOIC.
140 25 120 20 100 G = 10, 100 V
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V S = +5V 15 CM FOR SINGLE 80 AND DUAL SUPPLIES G = 100 60 VS =
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5V 10 40 G = 10 V 5
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COMMON-MODE REJECTION – dB S =
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5V VCM FOR DUAL INPUT COMMON-MODE RANGE – V 20 SUPPLIES ONLY 0 0 0.1 1 10 100 1k 10k 100k 1M 1 2 3 4 5 FREQUENCY – Hz SUPPLY VOLTAGE –
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V
Figure 1. Common-Mode Rejection vs. Frequency Figure 2. Input Common-Mode Range vs. Supply REV. D Information furnished by Analog Devices is be lieved 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. No license is granted by implication or other-
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Document Outline FEATURES APPLICATIONS PRODUCT DESCRIPTION CONECTION DIAGRAM SPECIFICATIONS SINGLE SUPPLY DUAL SUPPLY ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE Typical Performance Characteristics THEORY OF OPERATION ADJUSTING THE GAIN OF THE AD626 SINGLE-POLE LOW-PASS FILTERING CURRENT SENSOR INTERFACE BRIDGE APPLICATION OUTLINE DIMENSIONS Revision History