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Features
- ±10 V tracking outputs
- Kelvin connections
- Low tracking error: 1.5 mV
- Low initial error: 2.0 mV
- Low drift: 1.5 ppm/°C
- Low noise: 6 µVp-p
- Flexible output force and sense terminals
- High impedance ground sense
- Wide body SOIC and CERDIP packages
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The AD688 is a high precision ±10 V tracking reference. Low tracking error, low initial error and low temperature drift give the AD688 reference absolute ±10 V accuracy performance previously unavailable in monolithic form. The AD688 uses a proprietary ion-implanted buried Zener diode, and laser-wafer-drift- trimming of high stability thin-film resistors to provide outstanding performance at low cost.
The AD688 includes the basic reference cell and three additional amplifiers. The amplifiers are laser-trimmed for low offset and low drift and maintain the accuracy of the reference. The amplifiers are configured to allow Kelvin connections to the load and/or boosters for driving long lines or high current loads, delivering the full accuracy of the AD688 where it is required in the application circuit.
The low initial error allows the AD688 to be used as a system reference in precision measurement applications requiring 12-bit absolute accuracy. In such systems, the AD688 can provide a known voltage for system calibration and the cost of periodic recalibration can therefore be eliminated. Furthermore, the mechanical instability of a trimming potentiometer and the potential for improper calibration can be eliminated by using the AD688 and calibration software.
The AD688 is available in three versions. The AD688AQ and BQ grades are packaged in 16-pin cerdip (0.3") packages and are specified for operation from -40°C to +85°C. The AD688SQ grade is specified for operation from -55°C to +125°C.
PRODUCT HIGHLIGHTS
- Precision Tracking. The AD688 offers precision tracking ±10 V Kelvin output connections with no external components. Tracking error is less than 1.5 mV and fine-trim is available for applications requiring exact symmetry between the +10 V and −10 V outputs.
- Accuracy. The AD688 offers 12-bit absolute accuracy without any user adjustments. Optional fine-trim connections are provided for applications requiring higher precision. The fine-trimming does not alter the operating conditions of the Zener or the buffer amplifiers and thus does not increase the temperature drift.
- Low output noise. Output noise of the AD688 is low— typically 6 μVp-p. A pin is provided for broadband noise filtering using an external capacitor.
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AD688
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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| 5962-9321401MEA |
16-Lead CerDIP
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| AD688AQ |
16-Lead CerDIP
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| AD688ARWZ |
16-Lead SOIC Wide
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| AD688BQ |
16-Lead CerDIP
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SamacSys
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16-Lead CerDIP
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HTML
Material Declaration
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HTML
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SamacSys
- AD688ARWZ
- Pin/Package Drawing
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16-Lead SOIC Wide
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- AD688BQ
- Pin/Package Drawing
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16-Lead CerDIP
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SamacSys
Filter by Model
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Product Lifecycle
PCN
Apr 9, 2018
- 16_0026
Qualify TeamQuest Technology, Inc. for Burn-in and Life Test of Military and Aerospace Devices
5962-9321401MEA
Nov 7, 2012
- 12_0199
Qualification of New Conductive Silver-Filled Glass Die Attach Adhesive for Cerdip and Ceramic Flatpack (Cerpack) Packages.
5962-9321401MEA
AD688AQ
AD688BQ
Jun 6, 2012
- 12_0066
Add capacity for Burn In of Hermetic, 883 & QMLQ/Class B devices at TSSI Cavite
5962-9321401MEA
Nov 9, 2011
- 11_0050
Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines
5962-9321401MEA
AD688AQ
AD688BQ
Nov 9, 2011
- 11_0182
Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines
5962-9321401MEA
AD688AQ
AD688BQ
Feb 7, 2011
- 10_0003
Halogen Free Material Change for SOIC Wide Body Products Assembled at Amkor
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 9, 2018
- 16_0026
Qualify TeamQuest Technology, Inc. for Burn-in and Life Test of Military and Aerospace Devices
Nov 7, 2012
- 12_0199
Qualification of New Conductive Silver-Filled Glass Die Attach Adhesive for Cerdip and Ceramic Flatpack (Cerpack) Packages.
5962-9321401MEA
AD688AQ
AD688BQ
Jun 6, 2012
- 12_0066
Add capacity for Burn In of Hermetic, 883 & QMLQ/Class B devices at TSSI Cavite
Nov 9, 2011
- 11_0050
Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines
Nov 9, 2011
- 11_0182
Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines
Feb 7, 2011
- 10_0003
Halogen Free Material Change for SOIC Wide Body Products Assembled at Amkor
