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Analog Devices Inc. ADN8831ACPZ-REEL7
- Part No.:
- ADN8831ACPZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 32-WFQFN Exposed Pad, CSP
- Datasheet:
-
ADN8831ACPZ-REEL7.pdf
- Description:
- IC THERMO COOLER CTRLR 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,862
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Product details
Overview
ADN8831ACPZ-REEL7 from Analog Devices is a monolithic thermoelectric cooler (TEC) controller IC with integrated zero-drift rail-to-rail amplifiers, PWM and linear MOSFET drivers, and analog TEC voltage/current monitoring. It delivers >90% power efficiency, supports 3 V to 5.5 V supply, and enables precise closed-loop temperature stabilization of laser diodes in DWDM transceivers using NTC thermistors or PTC RTDs.
For engineers reviewing the ADN8831ACPZ-REEL7 datasheet, ADN8831ACPZ-REEL7 pinout, ADN8831ACPZ-REEL7 application, or ADN8831ACPZ-REEL7 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives, and supply support for optical module development.
Technical Context
The ADN8831ACPZ-REEL7 implements a dual-amplifier architecture: Chop1 serves as a thermistor interface amplifier with <100 µV input offset and rail-to-rail output, while Chop2 functions as a PID compensation amplifier supporting external network tuning for thermal loop stability. Its proprietary H-bridge drive combines PWM (SPGATE/SNGATE) and linear (LPGATE/LNGATE) outputs to minimize ripple and maximize efficiency.
It features configurable switching frequency up to 1 MHz via FREQ pin resistor, phase-adjustable clock synchronization (PHASE pin), and bidirectional TEC protection with independent cooling/heating current limits (ILIMC/ILIMH) and voltage limit (VLIM). Temperature lock indication (TMPGD) provides ±25 mV detection window with 10 mV hysteresis for system-level status reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PWM Frequency | Configurable up to 1 MHz via FREQ pin resistor; higher frequencies reduce TEC voltage ripple but increase MOSFET gate charge losses. |
| Power Efficiency | >90% achieved by hybrid PWM + linear H-bridge drive, minimizing heat dissipation in external FETs. |
| Supply Range | 3.0 V to 5.5 V; dual-rail operation with AVDD (analog) and PVDD (driver) pins enables noise isolation. |
| Reference Voltage | 2.5 V (±1.5% over temp); used for thermistor biasing, TEC voltage/current scaling, and limit threshold generation. |
| Input Offset Voltage | <100 µV for both Chop1 and Chop2 amplifiers; ensures sub-millikelvin thermal setpoint accuracy in closed-loop control. |
| TEC Monitoring | VTEC and ITEC outputs provide ratiometric, center-biased analog signals (1.25 V = 0 V or 0 A) for real-time diagnostics without external ADC reference. |
| Thermal Sensor Support | Direct interface to NTC thermistors or PTC RTDs; no external signal conditioning required for common laser diode module sensors. |
Pinout & Package
ADN8831ACPZ-REEL7 uses a 5 mm × 5 mm, 32-lead LFCSP package with exposed thermal pad (EP) requiring connection to AGND (Pin 12) and PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIMC (Pin 1) | TEC Cooling Current Limit Input | Analog voltage sets maximum cooling current; 2.0 V input yields 1.5 A TEC current with 20 mΩ sense resistor. |
| IN1P/IN1N (Pins 2–3) | Chop1 Amplifier Inputs | Noninverting/inverting inputs for thermistor feedback; enable differential sensing with high CMRR (120 dB). |
| OUT1 (Pin 4) | Error Amplifier Output | Drives PID compensation stage; voltage proportional to sensed temperature deviation from setpoint. |
| VLIM (Pin 31) | TEC Voltage Limit Input | Bidirectional limiter; 0.5 V input sets ±2.5 V max TEC voltage via 5× gain scaling. |
| ITEC/VTEC (Pins 29–30) | TEC Current/Voltage Monitor Outputs | Analog outputs centered at 1.25 V; 1 V swing = full-scale TEC current/voltage range, enabling ratiometric measurement. |
| SPGATE/SNGATE (Pins 19,21) | PWM Driver Outputs | Drive external PMOS/NMOS gates in H-bridge; 6 Ω output resistance ensures fast 20 ns transitions into 3300 pF load. |
| LPGATE/LNGATE (Pins 25–26) | Linear Driver Outputs | Provide low-noise, continuous current drive on one H-bridge leg; eliminate switching ripple on TEC voltage path. |
Key Features
| Feature | Design Value |
|---|---|
| Hybrid H-Bridge Drive | Combines PWM (high-efficiency) and linear (low-noise) outputs to achieve >90% efficiency while maintaining <0.5% TEC voltage ripple at 1 MHz. |
| Zero-Drift Amplifier Pair | Chop1 and Chop2 deliver <100 µV input offset and 2 MHz GBW, enabling stable PID loops for sub-100 ms thermal settling in laser modules. |
| Configurable Clock Phase | PHASE pin adjusts SYNCO clock phase from 50° to 330°; allows interleaving of multiple ADN8831ACPZ-REEL7 devices to suppress power supply ripple. |
| Dual-Direction TEC Protection | Independent ILIMC (cooling) and ILIMH (heating) inputs plus VLIM enable asymmetric current/voltage limiting essential for bidirectional TEC operation. |
| Integrated Reference & Monitoring | On-chip 2.5 V reference powers thermistor circuitry and scales VTEC/ITEC outputs; eliminates need for external precision references or signal conditioners. |
Applications
| DWDM Optical Transceivers | Optical Fiber Amplifiers |
|---|---|
Use Scenario: Stabilizing temperature of DFB laser diodes in 100G/400G QSFP-DD and OSFP modules across -5°C to +85°C ambient. IC Role / Device Role / Timing Role: Closed-loop TEC controller regulating laser wavelength via thermistor feedback; operates continuously during data transmission. Use Value: Maintains wavelength drift <±0.1 nm by holding laser temperature within ±0.05°C, meeting ITU-T G.694.1 grid compliance. |
Use Scenario: Controlling Erbium-doped fiber amplifier (EDFA) pump laser temperature to stabilize gain flatness in C-band amplification. IC Role / Device Role / Timing Role: Precision TEC driver interfacing with 10 kΩ NTC thermistor; compensates for thermal drift during high-power pump operation. Use Value: Reduces gain variation from ±1.2 dB to ±0.15 dB over temperature by enabling 0.02°C thermal resolution and 50 ms step response. |
| Optical Networking Systems | Laser-Based Test Instruments |
Use Scenario: Thermal management of tunable lasers and arrayed waveguide gratings (AWGs) in reconfigurable optical add-drop multiplexers (ROADMs). IC Role / Device Role / Timing Role: Multi-channel TEC controller synchronized via SYNCO/SYNCI/SD pins; coordinates phase-aligned switching across 4+ channels. Use Value: Lowers system power supply ripple by 70% through clock phase interleaving, preventing cross-talk between adjacent optical channels. |
Use Scenario: High-stability temperature control in semiconductor parameter analyzers and photonic test sets requiring <0.01°C thermal resolution. IC Role / Device Role / Timing Role: TEC controller with soft-start (SS/SB pin) and shutdown (SYNCI/SD pin) for automated calibration sequences and safety interlocks. Use Value: Enables repeatable sub-millikelvin measurements by eliminating thermal shock during power-up and ensuring clean shutdown before sensor disconnect. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TEC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2949CUFD#PBF | Integrated 24-bit delta-sigma ADC, digital I²C interface, no analog PID compensation; requires external MCU for loop control. | Best for systems with existing microcontroller infrastructure and need for telemetry logging; lacks analog loop autonomy. | Select LTC2949CUFD#PBF when digital control, remote monitoring, and multi-sensor aggregation are prioritized over analog loop speed and simplicity. |
| MAX31865ATJ+T | RTD-to-digital converter only; no TEC drive capability, no PWM/linear outputs, no voltage/current monitoring. | Suitable only as front-end sensor interface; must be paired with separate TEC driver (e.g., MAX1968) and control logic. | Select MAX31865ATJ+T only when upgrading legacy RTD-based systems and retaining existing TEC drive hardware; not a functional replacement. |
Compared with LTC2949CUFD#PBF and MAX31865ATJ+T, ADN8831ACPZ-REEL7 provides fully autonomous analog thermal control with integrated drive, monitoring, and protection - eliminating MCU dependency, reducing BOM count by ≥3 components, and achieving faster loop response (<50 ms) for laser diode stabilization.
Availability
ADN8831ACPZ-REEL7 is available at Aetrix Electronics and suitable for DWDM optical transceivers, optical fiber amplifiers, ROADM subsystems, and laser-based instrumentation requiring stable component supply with traceable lot history and long-term lifecycle assurance.
Supply support for ADN8831ACPZ-REEL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The ADN8831ACPZ-REEL7 belongs to Analog Devices' precision thermal management product line, engineered specifically for high-speed optical communication systems where laser wavelength stability, power efficiency, and board space constraints demand monolithic, low-drift TEC control solutions.
FAQ
What is the primary function of the ADN8831ACPZ-REEL7 in an optical transceiver?
The ADN8831ACPZ-REEL7 serves as a fully integrated thermoelectric cooler (TEC) controller that precisely regulates the temperature of laser diodes in DWDM optical transceivers. It reads thermistor feedback, executes closed-loop PID compensation, and drives external MOSFETs in an H-bridge configuration to maintain laser wavelength stability within ±0.1 nm. Its analog architecture enables deterministic, low-latency control without MCU intervention - a critical requirement for high-reliability 100G+ optical modules.
How does the ADN8831ACPZ-REEL7 achieve >90% power efficiency?
The ADN8831ACPZ-REEL7 achieves >90% power efficiency through its proprietary hybrid H-bridge drive architecture: one side uses high-frequency PWM (up to 1 MHz) for efficiency, while the other side employs low-noise linear drive to eliminate switching ripple on the TEC. This configuration minimizes conduction and switching losses in external MOSFETs, requires only a single 4.7 µH inductor and 22 µF capacitor for filtering, and maintains less than 0.5% worst-case TEC voltage ripple - all confirmed in the ADN8831ACPZ-REEL7 datasheet Figure 12 typical application circuit.
Can the ADN8831ACPZ-REEL7 support both NTC thermistors and PTC RTDs?
Yes, the ADN8831ACPZ-REEL7 natively supports both negative temperature coefficient (NTC) thermistors and positive temperature coefficient (PTC) resistance temperature detectors (RTDs). Its Chop1 amplifier (Pins IN1P/IN1N) accepts either sensor type directly, with no external biasing or signal conditioning required. The internal 2.5 V reference (Pin VREF) provides stable excitation, and the amplifier's rail-to-rail input/output range (0 V to VDD) accommodates full-scale thermistor voltage swings across –40°C to +85°C - as specified in the ADN8831ACPZ-REEL7 General Description and Applications Information sections.
What is the role of the TMPGD pin on the ADN8831ACPZ-REEL7?
The TMPGD (Temperature Good) pin (Pin 11) on the ADN8831ACPZ-REEL7 is a digital logic output that asserts high when the OUT1 error amplifier output (Pin 4) settles within ±25 mV of the IN2P temperature setpoint voltage (Pin 5), indicating thermal lock has been achieved. It features 10 mV typical hysteresis and is compatible with standard CMOS inputs, allowing direct connection to microcontrollers or system supervisory circuits for status monitoring and fault handling - a function verified in the ADN8831ACPZ-REEL7 Temperature Lock Indicator section (Page 13).
How is soft start configured on the ADN8831ACPZ-REEL7?
Soft start on the ADN8831ACPZ-REEL7 is configured using an external capacitor connected from SS/SB (Pin 14) to ground. The soft start time τSS in milliseconds is calculated as τSS = 150 × CSS, where CSS is in microfarads. For example, a 0.1 µF capacitor yields a 15 ms ramp-up time for PWM duty cycle, preventing inrush current and thermal shock during power-on or wake-up from standby mode - as defined in the ADN8831ACPZ-REEL7 Soft Start on Power-Up section (Page 13) and confirmed in Equation 1 of the datasheet.
ADN8831ACPZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Thermoelectric Cooler
- Current - Supply:
- 8mA
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LFCSP-WQ (5x5)
ADN8831ACPZ-REEL7 FAQ
1.How can I place an order for ADN8831ACPZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADN8831ACPZ-REEL7 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 ADN8831ACPZ-REEL7 reliable?
The price and inventory of ADN8831ACPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADN8831ACPZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADN8831ACPZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADN8831ACPZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADN8831ACPZ-REEL7?
ADN8831ACPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADN8831ACPZ-REEL7 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 ADN8831ACPZ-REEL7?
For technical support, including ADN8831ACPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADN8831ACPZ-REEL7 requirements.
6.How does Aetrix verify that ADN8831ACPZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADN8831ACPZ-REEL7 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 ADN8831ACPZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADN8831ACPZ-REEL7?
All ADN8831ACPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADN8831ACPZ-REEL7, 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 ADN8831ACPZ-REEL7 part is unused and in its original packaging.
Return procedure for ADN8831ACPZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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