Part Number: AD8629ARMZ-REEL

Manufacturer: Analogue Devices, Inc.


Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of AD8629ARMZ-REEL

Datasheet  AD8629ARMZ-REEL datasheet
Category Integrated Circuits (ICs)
Family Linear – Amplifiers – Instrumentation, OP Amps, Buffer Amps
Manufacturer Analog Devices Inc.
Packaging Tape & Reel (TR)
Part Status Active
Amplifier Type Zero-Drift
Number of Circuits 2
Output Type Rail-to-Rail
Slew Rate 1 V/μs
Gain Bandwidth Product 2.5MHz
-3db Bandwidth 2.5MHz
Current – Input Bias 30pA
Voltage – Input Offset 1μV
Current – Supply 850μA
Current – Output / Channel 30mA
Voltage – Supply, Single/Dual (±) 2.7 V ~ 5 V, ±1.35 V ~ 2.5 V
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118″, 3.00mm Width)
Supplier Device Package 8-MSOP

AD8629ARMZ-REEL Introduction

Are you looking for a modern part that can effectively boost messages on two channels? We’ll tell you about the Analogue Devices chopper stabilisation AD8629ARMZ-REEL differential amplifier, so you don’t have to look any further. This amplifier will change the way signals are amplified because it has amazing features and works better than any other. The AD8629ARMZ-REEL is a flexible solution that promises excellent signal quality. It has a rail-to-rail output and can work in a wide range of temperatures. Let’s take a closer look at its features and find out why this amplifier is the best choice for signal boosting.

AD8629ARMZ-REEL General Description

The offset, drift, and bias current of this amplifier are all very low. The AD8628, AD8629, and AD8630 are rail-to-rail input and output swing, auto-zero amplifiers with a wide bandwidth and low noise. Operation is fully defined between 2.7 V and 5 V for a single supply and between 1.35 V and 2.5 V for a dual supply. The AD8628, AD8629, and AD8630 have features that were only available in more expensive auto-zeroing or chopper-stabilised amps before. Using a design from Analogue Devices, Inc., these zero-drift amplifiers are low-cost, accurate, and have low noise.

No external capacitor is needed. The AD8628, AD8629, and AD8630 also cut down on the digital switching noise that is common in most chopper-stabilised amplifiers. The AD8628, AD8629, and AD8630 are good for uses where error sources can’t be tolerated. They have an offset voltage of only 1 V, drift of less than 0.005 V/°C, and noise of only 0.5 V p-p (0 Hz to 10 Hz). Sensors that measure position and pressure, medical equipment, and strain gauge amplifiers all benefit greatly from having almost no shift over the temperature range in which they work. The rail-to-rail input and output swings of the AD8628, AD29, and AD8630 can be used by many devices to make input biassing easier and increase SNR.

AD8629ARMZ-REEL Features

  • Lowest auto-zero amplifier noise
  • Low shift voltage: 1 V.
  • Input offset drift: 0.002 V/°C.
  • Input and output move from rail to rail.
  • 5 V with only one power source.
  • 130 dB for high gain, CMRR, and PSRR
  • Maximum of 100 pA of input bias current, which is very low.
  • 0 mA is a low source current.
  • Time to recover from overload: 50 s.
  • No external components are needed.
  • qualified for use in automobiles.


  • Photodiode amplifiers
  • Strain gauge amplifiers
  • Medical instrumentation
  • Thermocouple amplifiers
  • Precision current sensing

AD8629ARMZ-REEL Functional Description

Single-supply, rail-to-rail input and output operational amplifiers AD8628, AD8629, and AD8630 are precise. These amplifiers have an offset voltage of less than 1 V, making them easy to set up for high gains without output voltage inaccuracy. The 2 nV/°C temperature drift ensures a low offset voltage inaccuracy from 40°C to +125°C. These amplifiers are ideal for sensitive measurements in difficult situations. Patented auto-zeroing and chopping make the AD8628, AD8629, and AD8630 accurate.

The AD8628, AD8629, and AD8630 can maintain their low offset voltage across a wide Ftemperature range and for their whole lifespan due to their unique design. The AD8628, AD8629, and AD8630 have lower noise and bandwidth than previous auto-zero amplifiers. The AD8628, AD8629, and AD8630 feature over 50% lower voltage noise than any other auto-zero amplifier. Auto-zeroing or cutting previously improved amplifier specs. Since broad noise enters the auto-zeroed frequency region, it increases noise at low frequencies. Chopping reduces low-frequency noise but increases chopping-frequency noise.

The AD8628/AD8629/AD8630 family features patented “pingpong” auto-zeroing and chopping to reduce low-frequency noise and energy at the chopping and auto-zeroing frequencies. This boosts the signal-to-noise ratio without filtering in most situations. Filters can provide a helpful, wide, and noise-free spread due to the high clock frequency of 15 kHz. Auto-zeroing 5-lead TSOT amplifiers like the AD8628 are rare.

This beats the AC settings of previous auto-zero amplifiers. When DC accuracy is critical, the AD8628, AD8629, and AD8630 have low noise across a wide bandwidth (0 Hz to 10 kHz). The AD8628, AD8629, and AD8630 provide actual 16-bit accuracy in systems with signal bandwidths between 5 and 10 kHz. They’re best for high-resolution systems.

● 1/f NOISE

1/f noise, which is also called “pink noise,” is a big reason why dc-coupled readings are often wrong. This 1/f noise error term can be several V or more, and when the closed-loop gain of the circuit amplifies it, it can show up as a big output shift. For example, if an amplifier with a 5 V p-p 1/f noise is set up to have a gain of 1000, the 1/f noise will cause the output to be off by 5 mV. But the AD8628, AD8629, and AD8630 get rid of 1/f noise on the inside, which makes output mistakes much less likely. Here’s how the 1/f noise is taken care of on the inside. 1/f noise shows up as a shift to the AD8628, AD8629, and AD8630 inputs that changes slowly. With auto-zeroing, any DC or low-frequency shift is fixed.

So, the 1/f noise component is pretty much taken away, and the AD8628, AD8629, and AD8630 no longer have 1/f noise. The AD8628, AD8629, and AD8630 are better than other auto-zero amplifiers in system use because they have a very low noise level. Figure 49’s analysis shows that the AD8628 has a much lower input-referred noise density of 19.4 nV/Hz at 1 kHz than both Competitor A and Competitor B. The noise is flat from 0 Hz to 1.5 kHz and slowly gets louder until it reaches 20 kHz. Most places that use auto-zero amps want less noise at low frequencies.

● Input overvoltage protection

Rail-to-rail input amplifiers like the AD8628, AD8629, and AD8630 still require safeguards to prevent input voltage swings from exceeding the supply voltage. In a typical negative feedback setup, the amplifier adjusts its output to balance the voltage between the two inputs. However, large currents begin to flow through the amplifier’s ESD protection diodes if either input is more than 0.3 V above either supply rail.

These diodes shield the input transistors from ESD by connecting the inputs to each power line. The majority of the time, they have an adverse bias. However, these ESD diodes can be pushed in the reverse direction if the input voltage is greater than the source voltage. If the current via these diodes is not limited, the gadget could be permanently damaged. Using series resistors, the diode current can be kept below 5 mA if the input voltage is too high.

● Output phase reversal

In some amplifiers, if the input common-mode voltage range is exceeded, the output phase will flip. This is because when the common-mode voltage is shifted beyond the common-mode range, the amplifiers’ outputs can spike in the opposite direction from the supply rail. This is due to the differential input pair being dead, which triggers a dramatic change in internal voltages and, in turn, the erratic behaviour observed at the output.

As long as both inputs stay within the supply voltages, the AD8628, AD8629, and AD8630 amplifiers are guaranteed to never reverse the output phase. Input currents greater than 5 mA require a resistor to be connected in series with the input to prevent the supply voltage from being exceeded. This prevents the output’s phase from flipping.


In conclusion, the Analogue Devices chopper stabilisation AD8629ARMZ-REEL differential amplifier is a great part that does a great job of amplifying data in two channels. With its rail-to-rail output and wide range of temperatures at which it can work, it gives performance and versatility that are unmatched. The AD8629ARMZ-REEL is the best option whether you’re working in a harsh environment or need to boost a signal of high quality. Don’t pass up this amazing amplifier. Get in touch with ICRFQ right away to find out what options are available and how you can use this great component. Contact ICRFQ today to find out how to boost your signals with trust and accuracy.

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