The AD621 is an easy to use, low cost, low power, high accuracy instrumentation amplifier which is ideally suited for a wide range of applications. Its unique combination of high performance, small size and low power, outperforms discrete in amp implementations. High functionality, low gain errors and low gain drift errors are achieved by the use of internal gain setting resistors. Fixed gains of 10 and 100 can be easily set via external pin strapping. The AD621 is fully specified as a total system, therefore, simplifying the design process.

For portable or remote applications, where power dissipation, size and weight are critical, the AD621 features a very low supply current of 1.3 mA max and is packaged in a compact 8-pin SOIC, 8-pin plastic DIP or 8-pin cerdip. The AD621 also excels in applications requiring high total accuracy, such as precision data acquisition systems used in weigh scales and transducer interface circuits. Low maximum error specifications including nonlinearity of 10 ppm, gain drift of 5 ppm°/C, 50 µV offset voltage and 0.6 mV/°C offset drift ("B" grade), make possible total system performance at a lower cost than has been previously achieved with discrete designs or with other monolithic instrumentation amplifiers.

When operating from high source impedances, as in ECG and blood pressure monitors, the AD621 features the ideal combination of low noise and low input bias currents. Voltage noise is specified as 9 nV/(root) Hz at 1 kHz and 0.28 µV p-p from 0.1 Hz to 10 Hz. Input current noise is also extremely low at 0.1 pA/Hz. The AD621 outperforms FET input devices with an input bias current specification of 1.5 nA max over the full industrial temperature range.

Part#	Description	Single/Dual Supply	Vcc-Vee	Gain Setting Method	Bandwidth G=10 (kHz typ)	Gain min.	Gain max.	Min CMRR @ 60 Hz Min Gain	Min CMRR @ 60Hz Max Gain	Vnoise RTI 1-10 Hz µVp-p	Price* (1000-4999)
AD522	Diff Amp	Dual	10V to 36V	Resistor	3	1	1,000	75dB	100dB	4	-
AD524	Precision IA	Dual	12V to 36V	Pin	400	1	1,000	70dB	110dB	0.3	$9.41
AD526	Software Programmable	Dual	9V to 33V	Software	350	1	16	-	-	3	$6.31
AD620	General Purpose IA	Dual	4.6V to 36V	Resistor	800	1	10,000	73dB	110dB	0.28	$3.14
AD621	Precision IA	Dual	4.6V to 18V	Pin	800	10	100	93dB	110dB	0.28	$4.04
AD622	Low Cost IA	Dual	5.2V to 36V	Resistor	800	1	1,000	66dB	103dB	0.3	$2.48
AD623	S.S R-R IA	Single/Dual	2.7V to 12V	Resistor	100	1	1,000	70dB	105dB	2	$1.38
AD624	Precision IA	Dual	12V to 36V	Pin	400	1	1,000	70dB	110dB	0.3	$11.79
AD625	Programmable Gain IA	Dual	12V to 36V	Resistor	400	1	10,000	70dB	110dB	0.3	$8.68
AD626	Diff Amp	Single/Dual	2.4V to 12V	Pin	100	10	100	55dB	55dB	2	$3.66
AD627	Micropower IA	Single/Dual	2.2V to 36V	Resistor	30	5	1,000	77dB	77dB	1.2	$2.53
AD628	High CMV DA	Single/Dual	4.5V to 36V	Pin, Resistor	600	0.1	100	75dB	75dB	15	$1.76
AD629	High CMV DA	Dual	5V to 36V	fixed	500	-	-	77dB	77dB	15	$2.81
AD8129	Low Cost Diff Amp	Single/Dual	4.5V to 25V	Resistor	200000	10	-	94dB	-	-	$1.55
AD8202	High CMV DA	Single	3.5V to 12V	fixed	50	-	-	82dB	82dB	10	$1.49
AD8203	High CMV DA	Single	4.5V to 5.5V	fixed	60	-	-	82dB	82dB	10	$1.35
AD8205	S.S Diff Amp	Single	4.5V to 5.5V	fixed	50	-	-	78dB	78dB	20	$1.49
AD8206	S.S Diff Amp	Single	4.5V to 5.5V	fixed	100	-	-	76dB	76dB	20	$1.35
AD8210	Bi-Directional Shunt Mon	Single	4.5V to 5.5V	fixed	500	20	20	100dB	100dB	7	$1.79
AD8211	High CMV Shunt Mon	Single	4.5V to 5.5V	fixed	500	20	20	100dB	100dB	7	$0.80
AD8212	High CMV Shunt Mon	Single	7V to 65V	Resistor	1000	1	1,000	100dB	100dB	1.1	$0.92
AD8213	Dual High CMV Shunt Mon	Single	4.5V to 5.5V	fixed	500	20	20	100dB	100dB	7	$1.99
AD8214	High CMV Threshold Detec	Single	5V to 65V	Resistor	-	1	100	80dB	80dB	2.2	$0.75
AD8215	High CMV Shunt Mon	Single	4.5V to 5.5V	fixed	450	20	20	100dB	100dB	7	$1.20
AD8216	High BW 65 V Diff Amp	Single	4.5V to 5.5V	fixed	3000	3	3	80dB	80dB	20	$1.60
AD8220	R-R JFET IA	Single/Dual	4.6V to 36V	Resistor	800	1	1,000	78dB	94dB	0.8	$2.29
AD8221	High Performance IA	Dual	4.6V to 36V	Resistor	562	1	1,000	80dB	130dB	0.25	$1.99
AD8222	Dual High Performance IA	Dual	- to -	Resistor	750	1	10,000	80dB	130dB	0.25	$3.59
AD8223	S.S R-R IA	Single/Dual	3V to 25V	Resistor	200	5	1,000	70dB	105dB	2	-
AD8224	Dual JFET R-R IA	Single/Dual	4.6V to 36V	Resistor	800	1	1,000	78dB	94dB	0.8	$4.12
AD8225	Fixed G=5 IA	Dual	3.4V to 36V	fixed	900	-	-	86dB	86dB	1.5	$3.25
AD8228	Precision IA	Dual	4.6V to 36V	Pin	560	10	100	100dB	120dB	8	$2.99
AD8230	Zero Drift IA	Single/Dual	8V to 16V	Resistor	2	2	1,000	-	110dB	3	$2.95
AD8231	Zero Drift Software Prog	Single	3V to 6V	Pin, Software	700	1	128	80dB	110dB	0.7	$1.69
AD8250	Software Programmable	Dual	10V to 34V	Pin, Software	3000	1	10	80dB	98dB	1	$4.95
AD8251	Software Programmable	Dual	10V to 34V	Pin, Software	2500	1	8	80dB	98dB	1.2	$4.95
AD8253	Software Programmable	Dual	10V to 34V	Pin, Software	8000	1	1,000	80dB	120dB	1	-
AD8270	Dual Diff Amp	Dual	5V to 36V	Pin	10000	0.5	2	70dB	80dB	1	$1.89
AD8273	Dual Audio Diff Amp	Dual	5V to 36V	Pin	20000	0.5	2	77dB	-	2	$1.65
AD8290	Sensor Amp	-	2.6V to 5.5V	fixed	-	50	50	-	-	0.75	$1.50
AD8553	Zero Drift IA	Single	1.8V to 5.5V	Resistor	1	0.1	10,000	80dB	120dB	0.7	$1.30
AD8555	Sensor Amp	Single	5.5V to 2.7V	Software	n/a	70	1,280	80dB	96dB	0.5	$3.08
AD8556	Sen/Filter Amp	Single	2.7V to 5.5V	Software	n/a	70	1,280	80dB	94dB	0.5	$2.85
AD8557	Sensor Amp	Single	2.7V to 5.5V	Software	-	28	1,300	75dB	86dB	-	$2.10
AMP03	Precision Diff Amp	Dual	12V to 36V	fixed	3000	-	-	85dB	85dB	2	$2.78

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

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For detailed drawings and chemical composition please consult our  Package Site

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• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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