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Microchip Technology CD823
- Part No.:
- CD823
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- Die
- Datasheet:
-
CD823.pdf
- Description:
- DIODE ZENER 6.2V DIE
- Quantity:
- Payment:
- Shipping:
Inventory:4,377
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Product details
Overview
CD823 from Microsemi is a monolithic temperature-compensated zener reference die with nominal zener voltage 5.9–6.5 V, tested at 7.5 mA, zener impedance 15 Ω, and temperature coefficient 0.005 %/°C - used as precision voltage reference in high-reliability analog circuits operating from –65°C to +175°C.
For engineers reviewing the CD823 datasheet, CD823 pinout, CD823 application, or CD823 equivalent, this device serves as a high-stability, low-drift, silicon-dioxide-protected zener reference for aerospace, military, and downhole instrumentation where long-term voltage accuracy and extreme-temperature operation are critical.
Technical Context
The CD823 is a bare die zener diode with fully protected junctions and metallized cathode/anode terminals on silicon substrate. It operates with cathode positive relative to anode and requires electrically isolated backside mounting.
Its 0.005 %/°C temperature coefficient and 48 mV max voltage drift over –55°C to +100°C reflect optimized monolithic compensation design, distinct from standard zeners like 1N821–1N829 which exhibit higher coefficients (e.g., 0.01 %/°C for CD821).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.9–6.5 V at 7.5 mA - defines stable reference output range under nominal bias |
| Zener Test Current | 7.5 mA - required bias current to achieve specified voltage and impedance |
| Zener Impedance | 15 Ω - low dynamic resistance ensures minimal output voltage variation under load changes |
| Temp. Coefficient | 0.005 %/°C - enables <±0.05 % total drift over full industrial temperature range |
| Voltage Drift | 48 mV max over –55°C to +100°C - meets JEDEC Std. No. 5 stability requirement |
| Operating Temp. | –65°C to +175°C - supports deployment in harsh-environment avionics and oilfield electronics |
Pinout & Package
CD823 is supplied as a bare die in JANHC-qualified ceramic package with gold back metallization and aluminum top metallization. Chip thickness is 0.25 mm ±0.05 mm; die outline measures 0.711–0.813 mm × 0.203–0.254 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Top Metallization) | Cathode | Must be biased positive relative to anode for zener conduction; primary current path terminal |
| 2 (Top Metallization) | Anode | Reference ground node; reverse-biased connection point during regulation |
| 3 (Top Metallization) | Test Pad | Non-functional for circuit operation; used only for wire bond evaluation during manufacturing |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic temp. compensation | 0.005 %/°C TC enables sub-50 mV drift across –55°C to +100°C without external circuitry |
| Silicon dioxide junction protection | Prevents contamination and leakage degradation in high-humidity or corrosive environments |
| JANHC qualification | Meets MIL-PRF-19500/159 for reliability in defense and space-grade applications |
| Wire bond compatible metallization | Al top / Au back enables robust interconnect using thermosonic or ultrasonic bonding |
Applications
| Avionics Power Monitoring | Downhole Sensor Calibration |
|---|---|
Use Scenario: Real-time monitoring of 28 V DC bus voltage in flight control systems under thermal cycling. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and comparator threshold setting. Use Value: Maintains ±0.05 % reference accuracy from –55°C to +100°C, eliminating recalibration during mission profiles. | Use Scenario: Calibration reference for pressure transducers deployed at 175°C in oil/gas well logging tools. IC Role / Device Role / Timing Role: Stable bias source for Wheatstone bridge excitation and signal conditioning amplifiers. Use Value: Delivers 48 mV max voltage drift over full operating range, enabling single-point calibration over full depth/temperature profile. |
| Military Data Acquisition | Spacecraft Housekeeping |
Use Scenario: Reference for 16-bit SAR ADCs in ruggedized field-deployable signal recorders. IC Role / Device Role / Timing Role: Low-noise, low-impedance reference node for analog front-end signal chain. Use Value: 15 Ω zener impedance minimizes code-dependent errors and improves effective resolution by >0.5 LSB. | Use Scenario: Voltage reference for power system telemetry in LEO satellite EPS modules. IC Role / Device Role / Timing Role: Primary reference for battery voltage monitoring and regulator feedback loops. Use Value: Qualified to JANHC level with –65°C to +175°C operation ensures reliability across orbital thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CD825 | Zener impedance 15 Ω, but temp. coefficient 0.002 %/°C and voltage drift 19 mV - tighter stability than CD823 | Better suited for ultra-high-precision references where <20 mV drift is mandatory | Select CD825 when drift budget is ≤20 mV; CD823 remains optimal for cost-sensitive high-temp designs requiring ≤48 mV drift |
| CD827 | Same voltage range, but temp. coefficient 0.001 %/°C and voltage drift 9 mV - highest stability in CD82x family | Used in metrology-grade calibration equipment and atomic clock biasing where sub-10 mV drift is required | Choose CD827 only if drift specification demands <10 mV; CD823 offers best balance of stability, availability, and qualification level for general high-reliability use |
Compared with CD825 and CD827, the CD823 provides a mid-tier stability grade (48 mV drift, 0.005 %/°C) that reduces cost and maintains full JANHC qualification - making it ideal for avionics and downhole applications where 50 mV drift is acceptable but solder-reflow compatibility is not required.
Availability
CD823 is available at Aetrix Electronics and suitable for avionics power monitoring, downhole sensor calibration, and military data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD823 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs for aerospace, defense, and industrial markets.
The CD823 belongs to Microsemi's legacy MIL-qualified zener reference die family, designed specifically for precision voltage referencing in extreme-temperature, radiation-tolerant, and mission-critical analog subsystems.
FAQ
What is the zener voltage tolerance of CD823?
The CD823 has a zener voltage range of 5.9 V to 6.5 V when measured at 7.5 mA test current and 25°C ambient temperature. This 600 mV span reflects process-controlled tight distribution for high-yield integration into precision reference circuits. The CD823 does not specify a single typical value - system design must accommodate the full min/max range.
Is CD823 compatible with solder reflow assembly?
No, CD823 is explicitly incompatible with solder reflow per its datasheet. It is qualified for wire bonding and conductive die attach only. The CD823 uses aluminum top metallization and gold backside, which cannot withstand reflow thermal profiles without intermetallic degradation. Use CD823 only with thermosonic bonding or epoxy-based die attach.
What is the maximum reverse leakage current for CD823?
The CD823 specifies a maximum reverse leakage current (IR) of 2 μA at 25°C and VR = 3 Vdc. This low leakage ensures minimal error contribution in high-impedance reference divider networks and preserves accuracy in battery-powered or low-power sensing applications where quiescent current matters.
How does CD823 differ from CD823A?
The CD823A is the JANKC-qualified version with identical electrical specs (5.9–6.5 V, 7.5 mA, 15 Ω, 48 mV, 0.005 %/°C) but tighter mechanical tolerances and enhanced screening per MIL-PRF-19500/159 Appendix A. The CD823A also features reduced zener impedance (13 Ω vs. 15 Ω) due to process refinement, while maintaining full interchangeability in circuit design.
Can CD823 be used as a direct replacement for 1N823?
No - the 1N823 is a through-hole packaged zener diode with different thermal characteristics, lead inductance, and qualification level. Although the CD823 is electrically equivalent to 1N823 per datasheet note, it is a bare die requiring custom mounting and wire bonding. Substituting CD823 for 1N823 requires PCB redesign, thermal interface engineering, and assembly process validation.
CD823 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±4.83%
- Power - Max:
- -
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
CD823 FAQ
1.How can I place an order for CD823 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD823 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 CD823 reliable?
The price and inventory of CD823 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD823 is usually 5 days.
3.What payment methods are accepted for CD823?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD823 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD823?
CD823 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD823 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 CD823?
For technical support, including CD823 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD823 requirements.
6.How does Aetrix verify that CD823 is sourced from the original manufacturer or authorized distributors?
All CD823 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 CD823 meets industry standards.
7.What is the process for return or replacement of CD823?
All CD823 units undergo pre-shipment inspection (PSI). If there is an issue with CD823, 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 CD823 part is unused and in its original packaging.
Return procedure for CD823:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD823 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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SMAJ4744A-TP
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