AD8629S

ASD0016529 Rev. E | Page 6 of 8

TABLE IIB – LIFE TEST/BURN-IN DELTA LIMITS

Table IIB

Parameter

Symbol

Delta

Units

Offset voltage

Vs = 5.0V, Vcm = 2.5V

±5

µV

Input Bias Current

Vs = 5.0V

±170

pA

Supply Current

Vs = 5.0V

±116

µA

5.0 Burn-In Life Test, and Radiation

5.1. Burn-In Test Circuit, Life Test Circuit

5.1.1.The test conditions and circuit shall be maintained by the manufacturer under document revision level

control and shall be made available to the preparing or acquiring activity upon request. The test circuit

shall specify the inputs, outputs, biases, and power dissipation, as applicable, in accordance with the

intent specified in method 1015 test condition B of MIL-STD-883.

5.1.2.HTRB is not applicable for this drawing.

5.2. Radiation Exposure Circuit

5.2.1.The radiation exposure circuit shall be maintained by the manufacturer under document revision level

control and shall be made available to the preparing and acquiring activity upon request. Total dose

irradiation testing shall be performed in accordance with MIL-STD-883 method 1019, condition A.

6.0 MIL-PRF-38535 QMLV Exceptions

6.1. Wafer Fabrication

Wafer fabrication occurs at MIL-PRF-38535 QML Class Q certified facility.

6.2. Wafer Lot Acceptance (WLA)

Full WLA per MIL-STD-883 TM 5007 is not available for this product. SEM inspection per MIL-STD-883,

TM2018 is not applicable to the AD8629. The wafer fabrication process is manufactured using planarized

metallization.

7.0 Application Notes

7.1. Functional Description

The AD8629 is a single-supply, ultrahigh precision rail-to-rail input and output operational amplifier. The

typical offset voltage of less than 1 μV allows this amplifier to be easily configured for high gains without risk

of excessive output voltage errors. The extremely small temperature drift ensures a minimum offset voltage

error over their entire temperature range of −55°C to +125°C, making this amplifier ideal for a variety of

sensitive measurement applications in harsh operating environments.

The AD8629 achieves a high degree of precision through a patented combination of auto-zeroing and

chopping. This unique topology allows the AD8629 to maintain its low offset voltage over a wide temperature

range. The AD8629 also optimizes the noise and bandwidth over previous generations of auto-zero

amplifiers, offering the lowest voltage noise of any auto-zero amplifier by more than 50%.

Previous designs used either auto-zeroing or chopping to add precision to the specifications of an amplifier.

Auto-zeroing results in low noise energy at the auto-zeroing frequency, at the expense of higher low

frequency noise due to aliasing of wideband noise into the auto-zeroed frequency band. Chopping results in

lower low frequency noise at the expense of larger noise energy at the chopping frequency. The AD8629 uses