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Analog Devices Inc. AD588KQ
- Part No.:
- AD588KQ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
AD588KQ.pdf
- Description:
- IC VREF SERIES 0.01% 16CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
AD588KQ from Analog Devices is a high-precision, dual-tracking voltage reference IC in 16-lead CERDIP packaging, delivering ±5 V tracking with <1 mV symmetry error, 1.5 ppm/°C drift, and 6 µV p-p (0.1–10 Hz) output noise. It serves as a system-level calibration reference in 12-bit precision data acquisition systems requiring stable, programmable dual-rail outputs.
For engineers reviewing the AD588KQ datasheet, AD588KQ pinout, AD588KQ application, or AD588KQ equivalent, key selection criteria include guaranteed 0°C to +70°C operation, Kelvin force/sense capability for load regulation down to ±50 µV/mA, and pin-strappable output configurations (+10 V, −10 V, ±5 V, +5 V, −5 V) without external components.
Technical Context
The AD588KQ integrates a laser-trimmed, ion-implanted buried Zener reference cell with three precision buffer amplifiers (A2, A3, A4) and thin-film resistor networks to enable programmable output ranges and Kelvin sensing. Its ground-sense amplifier (A2) actively references system ground to internal nodes (VHIGH, VLOW, VCT), enabling true 4-wire output regulation.
Pin-strapping via connections between GND SENSE ±IN (Pins 9/10) and VHIGH/VLOW/VCT (Pins 6/8/11) selects output mode; gain (Pin 5) and balance (Pin 12) trims adjust span magnitude and center-tap position independently, with 150 kΩ input impedance and ±4 mV trim range-enabling zero-error calibration without degrading temperature stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Drift | ±2 ppm/°C (0°C to +70°C) - ensures ≤2.1 mV total output shift across full industrial operating range |
| Initial Output Error | ±3 mV max (+10 V/−10 V) - supports 12-bit absolute accuracy without trimming in most systems |
| ±5 V Tracking Symmetry | ±1.5 mV max - enables matched positive/negative rails for bipolar ADC/DAC biasing |
| Output Noise | 6 µV p-p (0.1–10 Hz) - low enough to avoid limiting SNR in 16-bit converter interfaces |
| Load Regulation | ±50 µV/mA (0–10 mA) - maintains accuracy under varying load current via Kelvin sense architecture |
| Supply Current | 6–10 mA - compatible with standard ±15 V analog supply rails without excessive power dissipation |
| Long-Term Stability | 15 ppm/1000 hr - reduces need for periodic recalibration in deployed instrumentation |
Pinout & Package
AD588KQ is housed in a hermetically sealed 16-lead CERDIP package (ceramic dual in-line package), rated for 0°C to +70°C operation and compliant with MIL-STD-883 test methods.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | A3 OUT FORCE / A4 OUT FORCE | Kelvin force outputs for +10 V/−10 V or ±5 V rails; connect directly to load to deliver full buffered output current (±10 mA) |
| 3, 14 | A3 OUT SENSE / A4 OUT SENSE | Kelvin sense returns; connect to load ground point to eliminate wire-drop error in high-accuracy applications |
| 6, 8, 11 | VHIGH / VLOW / VCT | Unbuffered reference nodes: 10 V high, 0 V low, and 5 V center tap - used for pin-strapped output configuration |
| 5, 12 | GAIN ADJ / BAL ADJ | Laser-trimmed adjustment inputs (150 kΩ) for calibrating output span magnitude and symmetry; ±4 mV range enables zero-error tuning |
| 7 | NOISE REDUCTION | Connects to internal Zener node; adding 1 µF capacitor reduces broadband noise from 600 µV p-p to ~200 µV p-p |
| 9, 10 | GND SENSE +IN / −IN | Differential inputs to ground-sense amplifier A2; configure reference ground reference point for VHIGH/VLOW/VCT outputs |
Key Features
| Feature | Design Value |
|---|---|
| Pin-strappable output modes | Single or dual outputs (+10 V, −10 V, ±5 V, +5 V, −5 V) selected by external pin wiring-no external resistors or logic required |
| Kelvin force/sense architecture | Separate force and sense paths for A3/A4 buffers eliminate IR drop errors in long traces or high-current loads |
| Ground-sense amplifier (A2) | Actively references system ground to internal reference nodes, enabling true 4-wire regulation of VHIGH/VLOW/VCT |
| Fine-trim calibration interface | GAIN ADJ and BAL ADJ pins allow post-mounting calibration to zero initial error without affecting temperature drift performance |
| Low-noise Zener core | Buried Zener with 100 nV/√Hz spectral density and 6 µV p-p (0.1–10 Hz) noise-optimized for precision converter interfaces |
Applications
| High-Accuracy Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: 12-bit to 16-bit multichannel DAQ system performing factory calibration of sensors and transducers. IC Role / Device Role / Timing Role: System reference providing stable ±5 V tracking rails for ADC front-end biasing and DAC output scaling. Use Value: ±1.5 mV tracking error and ±2 ppm/°C drift ensure measurement repeatability across thermal cycles without manual recalibration. |
Use Scenario: Rack-mounted ATE platform requiring simultaneous sourcing of precision +10 V and −10 V excitation voltages for DUT characterization. IC Role / Device Role / Timing Role: Dual-rail reference source with independent Kelvin outputs driving multiple DUT channels via multiplexed cabling. Use Value: Load regulation of ±50 µV/mA and force/sense terminals maintain voltage accuracy despite variable channel count and cable resistance. |
| Medical Instrumentation | Industrial Process Control |
|
Use Scenario: Portable ECG monitor requiring low-noise, battery-efficient analog front-end with bipolar signal conditioning. IC Role / Device Role / Timing Role: Low-drift ±5 V reference for op-amp biasing and ADC reference in isolated signal chain. Use Value: 6 µV p-p (0.1–10 Hz) noise and 15 ppm/1000 hr stability support clinical-grade baseline stability over device lifetime. |
Use Scenario: PLC analog I/O module converting 4–20 mA sensor signals with 12-bit resolution and field recalibration capability. IC Role / Device Role / Timing Role: Calibration reference for auto-zero and gain calibration routines executed during startup and maintenance cycles. Use Value: GAIN ADJ/BAL ADJ pins enable firmware-controlled digital calibration using external DACs-eliminating mechanical potentiometers and field service visits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD588AQ | Same architecture and pinout; specified for −25°C to +85°C industrial range (vs. AD588KQ's 0°C to +70°C) | Required for extended-temperature industrial environments where ambient exceeds 70°C | Select AD588AQ when operating temperature must exceed +70°C; otherwise AD588KQ offers tighter drift spec at lower cost |
| REF5025 | Single-output 2.5 V reference (SOIC-8); 3 ppm/°C drift, 4 µV p-p noise; no tracking or Kelvin outputs | Suitable only for unipolar, single-rail systems needing ultra-low noise-not for ±5 V tracking or load regulation | Choose REF5025 only for compact, low-power 2.5 V reference needs; AD588KQ remains necessary for dual-rail, Kelvin, or programmable outputs |
Compared with AD588AQ, AD588KQ trades extended temperature range for tighter drift (±2 vs. ±3 ppm/°C) and lower cost; compared with REF5025, AD588KQ provides programmable dual outputs and Kelvin regulation-making it irreplaceable in bipolar, high-accuracy systems.
Availability
AD588KQ is available at Aetrix Electronics and suitable for high-accuracy data acquisition, automated test equipment, and medical instrumentation requiring stable component supply across long production lifecycles.
Supply support for AD588KQ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD588 product line delivers monolithic, multi-output precision voltage references designed specifically for calibration-critical systems demanding 12-bit+ absolute accuracy without manual trimming.
FAQ
What is the operating temperature range for AD588KQ?
The AD588KQ is specified for operation from 0°C to +70°C. This grade is optimized for commercial and laboratory environments where ambient temperatures remain within this band. Its ±2 ppm/°C drift specification applies across this full range, and it meets MIL-STD-883 test requirements for reliability. The AD588KQ is not rated for operation below 0°C or above +70°C-using it outside this range may result in unguaranteed performance or accelerated aging.
Can AD588KQ generate ±5 V tracking outputs without external components?
Yes, AD588KQ supports true ±5 V tracking mode with no external components. By connecting Pin 10 (GND SENSE –IN) to Pin 11 (VCT), and routing appropriate force/sense connections (e.g., Pins 1/3 to +5 V load, Pins 14/15 to −5 V load), the device delivers matched +5 V and −5 V outputs with ≤1.5 mV symmetry error. This configuration leverages the internal 10 V span and center-tap architecture-no resistors, op-amps, or trimming are needed for basic tracking operation.
How does the NOISE REDUCTION pin (Pin 7) function in AD588KQ?
The NOISE REDUCTION pin (Pin 7) connects to the output of the internal Zener diode's bias network. Adding a 1 µF capacitor from Pin 7 to ground forms a low-pass filter with the internal 4 kΩ resistor, reducing broadband noise from ~600 µV p-p (1 MHz BW) to ~200 µV p-p. In ±5 V mode, a 39 kΩ resistor between Pin 6 and Pin 2 is also required for stable startup. Leaving Pin 7 open maintains the base 6 µV p-p (0.1–10 Hz) noise floor.
What is the purpose of GAIN ADJ (Pin 5) and BAL ADJ (Pin 12) on AD588KQ?
GAIN ADJ (Pin 5) adjusts the magnitude of the full 10 V reference span, while BAL ADJ (Pin 12) fine-tunes the center-tap position (VCT) to achieve exact ±5 V symmetry. Both accept ±4 mV trims via 100 kΩ potentiometers and feature 150 kΩ input impedance-ensuring calibration does not load the reference. Trimming introduces no additional temperature drift, and GAIN ADJ must be adjusted before BAL ADJ to avoid interaction.
Is AD588KQ pin-compatible with other AD588 variants like AD588AQ or AD588ARWZ?
AD588KQ shares identical pinout and functionality with AD588AQ (16-lead CERDIP, −25°C to +85°C) and AD588ARWZ (16-lead SOIC, −25°C to +85°C). All three use the same pin configuration, electrical architecture, and connection diagrams. However, AD588KQ is not pin-compatible with AD588JQ (same package but different temp grade) in terms of guaranteed specifications-only the physical layout matches. No PCB changes are required when substituting among CERDIP-packaged variants.
AD588KQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Programmable
- Voltage - Output (Min/Fixed):
- ±5V, ±10V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.01%
- Temperature Coefficient:
- 1.5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 10.8V ~ 36V
- Current - Supply:
- 10mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-CERDIP
AD588KQ FAQ
1.How can I place an order for AD588KQ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD588KQ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD588KQ reliable?
The price and inventory of AD588KQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD588KQ is usually 5 days.
3.What payment methods are accepted for AD588KQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD588KQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD588KQ?
AD588KQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD588KQ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD588KQ?
For technical support, including AD588KQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD588KQ requirements.
6.How does Aetrix verify that AD588KQ is sourced from the original manufacturer or authorized distributors?
All AD588KQ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD588KQ meets industry standards.
7.What is the process for return or replacement of AD588KQ?
All AD588KQ units undergo pre-shipment inspection (PSI). If there is an issue with AD588KQ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD588KQ part is unused and in its original packaging.
Return procedure for AD588KQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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