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Analog Devices Inc. ADN8834ACBZ-R7
- Part No.:
- ADN8834ACBZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 25-WFBGA, WLCSP
- Datasheet:
-
ADN8834ACBZ-R7.pdf
- Description:
- IC THERMO COOLER DRIVER 25WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,287
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Product details
Overview
ADN8834ACBZ-R7 from Analog Devices is an ultracompact, monolithic thermoelectric cooler (TEC) controller with integrated 1.5 A H-bridge power stage, dual zero-drift chopper amplifiers, and analog PID compensation - designed for precision temperature stabilization of laser diodes in optical modules. It supports NTC/RTD sensors, delivers 2.0 MHz PWM switching, and features independent heating/cooling current limits.
For engineers reviewing the ADN8834ACBZ-R7 datasheet, ADN8834ACBZ-R7 pinout, ADN8834ACBZ-R7 application, or ADN8834ACBZ-R7 equivalent, this page provides verified technical context, real-world thermal control use cases, validated alternative parts, and supply-ready procurement details - all grounded in Rev. C datasheet specifications and WLCSP package validation.
Technical Context
The ADN8834ACBZ-R7 implements a patented single-inductor, hybrid linear-PWM architecture: one side of the H-bridge uses a linear driver (LDR) for low-noise current control, while the other uses a 2.0 MHz PWM driver (SW/SFB) - enabling >90% efficiency and sub-1% output ripple with only one 1 µH inductor and one 10 µF capacitor. Its two chopper amplifiers (Chopper 1 for thermistor signal conditioning, Chopper 2 for PID compensation) operate rail-to-rail with <100 µV offset and 120 dB CMRR.
Temperature regulation is achieved via autonomous analog loop: the error amplifier (OUT1) compares sensor feedback to a setpoint voltage, then drives the PID compensator (OUT2), which directly controls the H-bridge. Real-time TEC voltage (VTEC) and current (ITEC) monitoring are provided with ±10% accuracy (WLCSP), referenced to a 2.50 V ±1% internal VREF. Shutdown is triggered when VLIM/SD falls below 0.07 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max TEC Current | 1.5 A at −40°C to +105°C - enables direct drive of medium-power TECs without external MOSFETs. |
| PWM Frequency | 2.0 MHz typical - allows compact filtering (1 µH/10 µF), minimizes EMI, and supports phase-sync across multiple units. |
| VREF Accuracy | 2.50 V ±1% - provides stable bias for thermistor bridges and precise scaling of ILIM/VLIM thresholds. |
| Chopper Amplifier Offset | <100 µV - ensures long-term thermal stability <±0.1°C over temperature in closed-loop operation. |
| TEC Voltage Monitor Gain | 0.25 V/V - maps ±4 V TEC differential range to 0.25–2.625 V on VTEC pin for ADC interfacing. |
| Current Sense Accuracy | ±10% (700 mA–1.5 A, VPVIN = 3.3 V) - enables reliable real-time current feedback without external shunt resistor. |
| Package | 25-ball, 2.5 mm × 2.5 mm WLCSP - ultra-small footprint ideal for space-constrained optical modules and transceivers. |
Pinout & Package
ADN8834ACBZ-R7 is packaged in a 25-ball, 2.5 mm × 2.5 mm wafer-level chip-scale package (WLCSP) with 0.4 mm ball pitch. The exposed die pad (EPAD) must be soldered to AGND for thermal and electrical integrity. Pin functions are defined per Analog Devices Rev. C datasheet Figure 2 and Table 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LDR | Linear driver output | H-bridge high-side linear output; sinks/sources up to 1.5 A with RDS(ON) ≤ 50 mΩ (P-MOSFET) @ 5 V. |
| SW | PWM switch node | H-bridge low-side PWM output; switches at 2.0 MHz with 1 ns rise time into 1 nF load. |
| ITEC | TEC current monitor | Analog output: 1.25 V ± (ITEC × 0.525 V/A); enables bidirectional current readback without sense resistor. |
| VTEC | TEC voltage monitor | Analog output: 1.25 V + 0.25 × (VLDR − VSFB); maps full TEC differential voltage range to 0.005–2.625 V. |
| ILIM | Current limit programming | Accepts voltage input to set independent cooling (1.3–2.3 V) and heating (0.2–1.2 V) current thresholds. |
| VLIM/SD | Voltage limit / shutdown | Resistor-divider input sets asymmetric TEC voltage limits; pulled ≤0.07 V to force 350 µA shutdown mode. |
| EN/SY | Enable / sync input | Logic-high (>2.1 V) enables device; accepts external 1.85–3.25 MHz clock for multi-device synchronization. |
| OUT1 | Error amplifier output | Drives temperature error signal to OUT2; used as TMPGD input in LFCSP (not present in WLCSP variant). |
Key Features
| Feature | Design Value |
|---|---|
| No external sense resistor | Integrated current sensing eliminates shunt resistor, reducing BOM count, board area, and power loss. |
| Independent heating/cooling limits | Separate ILIM and VLIM thresholds allow asymmetric thermal response - critical for laser diode transient management. |
| Zero-drift chopper amplifiers | Two rail-to-rail amplifiers with <100 µV offset and 2 MHz GBW enable stable analog PID loops without drift-induced thermal drift. |
| 2.5 V reference with 1% accuracy | Stable VREF powers sensor bridges and calibrates ILIM/VLIM thresholds - removes need for external reference IC. |
| AEC-Q100 qualified | Qualified for automotive-grade reliability (Grade 2, −40°C to +105°C ambient), supporting under-hood optical sensing applications. |
Applications
| Optical Transceivers | Laser Diode Temperature Control |
|---|---|
Use Scenario: Stabilizing temperature of DFB/FP laser diodes inside SFP28 and QSFP-DD pluggable modules operating at 10–100 Gbps. IC Role / Device Role / Timing Role: Monolithic TEC controller providing closed-loop analog PID regulation using integrated chopper amplifiers and real-time ITEC/VTEC feedback. Use Value: Maintains laser wavelength within ±0.1 nm by holding diode temperature to ±0.05°C, preventing mode hopping and extinction ratio degradation. |
Use Scenario: Precision thermal regulation of pump lasers in erbium-doped fiber amplifiers (EDFAs) for C-band optical networks. IC Role / Device Role / Timing Role: Dual-mode TEC driver delivering 1.5 A bidirectional current with independent heating/cooling limits to compensate for ambient drift and pump power variation. Use Value: Enables <10 ms thermal settling after power-on and <±0.02°C long-term stability - meeting Telcordia GR-1312-CORE requirements. |
| Fiber Optic Test Equipment | Biomedical Laser Systems |
Use Scenario: Temperature stabilization of tunable external cavity lasers (ECLs) in optical spectrum analyzers and OTDRs. IC Role / Device Role / Timing Role: High-accuracy analog TEC controller using VREF-biased NTC bridge and chopper-based PID to suppress thermal noise below 10 µK/√Hz. Use Value: Reduces laser frequency jitter by >20 dB vs. open-loop control, enabling sub-pm resolution spectral measurements. |
Use Scenario: Regulating temperature of surgical diode lasers (808 nm, 980 nm) in portable dermatology and ophthalmology devices. IC Role / Device Role / Timing Role: Compact WLCSP TEC controller with soft-start (150 ms) and thermal shutdown (170°C) for safety-critical medical thermal management. Use Value: Achieves IEC 60601-1 compliance via autonomous analog loop - eliminating software dependency and firmware validation overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TEC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADN8833ACPZ-R7 | LFCSP-24 package only; no WLCSP option; digital-only thermal loop (no analog PID path); lacks VTEC/ITEC monitor outputs. | Suitable for microcontroller-based digital PID systems where analog autonomy is not required; lower integration for cost-sensitive designs. | Select when firmware-controlled temperature tuning is preferred and board space permits larger 4 mm × 4 mm LFCSP. |
| MAX1968EUB+ | Higher 3 A current rating but requires external sense resistor; no integrated chopper amplifiers; 1.25 MHz max switching frequency. | Better for high-power TECs (>2 A); less suitable for ultra-low-drift applications due to higher amplifier offset (300 µV) and no auto-zero architecture. | Choose when driving large-area TECs in industrial laser systems, accepting added BOM complexity and reduced thermal stability. |
Compared with ADN8834ACBZ-R7, ADN8833ACPZ-R7 trades analog PID autonomy and WLCSP size for lower cost and digital flexibility, while MAX1968EUB+ offers higher current at the expense of measurement accuracy, integration, and thermal drift performance - making ADN8834ACBZ-R7 optimal for space- and stability-critical optical modules.
Availability
ADN8834ACBZ-R7 is available at Aetrix Electronics and suitable for optical transceivers, fiber amplifiers, test instrumentation, and biomedical laser systems requiring stable component supply, AEC-Q100 qualification, and WLCSP-level miniaturization.
Supply support for ADN8834ACBZ-R7 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 DSP technologies, serving precision instrumentation, communications, and industrial markets since 1965.
The ADN8834 belongs to Analog Devices' TEC controller product line - engineered specifically for high-stability, low-noise thermal regulation in photonics, where analog autonomy, chopper-grade precision, and ultra-compact packaging are mandatory.
FAQ
What is the maximum TEC current supported by the ADN8834ACBZ-R7?
The ADN8834ACBZ-R7 supports up to 1.5 A of continuous TEC current at −40°C to +105°C ambient temperature. This rating applies to both heating and cooling modes and is validated for the 25-ball WLCSP package. At junction temperatures up to +125°C, the maximum current reduces to 1.2 A per the datasheet's thermal derating curve. The device achieves this with integrated low-RDS(ON) MOSFETs (≤50 mΩ P-MOSFET at 5 V) and no external sense resistor.
Does the ADN8834ACBZ-R7 support both NTC and RTD temperature sensors?
Yes, the ADN8834ACBZ-R7 explicitly supports both negative temperature coefficient (NTC) thermistors and positive temperature coefficient (PTC) resistive temperature detectors (RTDs). Its Chopper 1 amplifier (IN1P/IN1N → OUT1) is configured as a precision thermistor interface, accepting standard 10 kΩ NTCs or Pt100/Pt1000 RTDs. The 2.50 V reference provides accurate biasing for sensor bridges, and the analog PID loop operates autonomously without MCU intervention.
How does the ADN8834ACBZ-R7 implement analog PID control without external components?
The ADN8834ACBZ-R7 implements analog PID control using its two integrated zero-drift chopper amplifiers: Chopper 1 conditions the thermal sensor signal into a linear voltage (OUT1), and Chopper 2 (IN2P/IN2N/OUT2) serves as the PID compensator. External RC networks connected to OUT2 configure proportional, integral, and derivative terms - as shown in Figure 26 of the Rev. C datasheet. No external op-amps, DACs, or microcontrollers are needed for fully autonomous analog loop operation.
What is the function of the ITEC and VTEC pins on the ADN8834ACBZ-R7?
The ITEC pin outputs an analog voltage proportional to TEC current: VITEC = 1.25 V ± (ITEC × 0.525 V/A), enabling bidirectional readback with ±10% accuracy. The VTEC pin outputs VVTEC = 1.25 V + 0.25 × (VLDR − VSFB), mapping the full TEC differential voltage range (±4 V) to 0.005–2.625 V. Both pins eliminate the need for external sense resistors or differential amplifiers - simplifying system-level monitoring and diagnostics for the ADN8834ACBZ-R7.
Is the ADN8834ACBZ-R7 pin-compatible with other devices in the ADN883x family?
No, the ADN8834ACBZ-R7 is not pin-compatible with ADN8831 or ADN8833. It uses a unique 25-ball WLCSP footprint (2.5 mm × 2.5 mm) with dedicated ball assignments for LDR, SW, ITEC, VTEC, and dual chopper amplifier I/O - distinct from the 24-lead LFCSP of ADN8833 or the 32-lead LFCSP of ADN8831. Pin mappings differ across all three variants, and PCB layout must be designed specifically for ADN8834ACBZ-R7 per Figure 2 and Table 5 in the Rev. C datasheet.
ADN8834ACBZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 25-WFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Thermoelectric Cooler
- Current - Supply:
- 3.3mA
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-WLCSP (2.54x2.54)
ADN8834ACBZ-R7 FAQ
1.How can I place an order for ADN8834ACBZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADN8834ACBZ-R7 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 ADN8834ACBZ-R7 reliable?
The price and inventory of ADN8834ACBZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADN8834ACBZ-R7 is usually 5 days.
3.What payment methods are accepted for ADN8834ACBZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADN8834ACBZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADN8834ACBZ-R7?
ADN8834ACBZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADN8834ACBZ-R7 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 ADN8834ACBZ-R7?
For technical support, including ADN8834ACBZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADN8834ACBZ-R7 requirements.
6.How does Aetrix verify that ADN8834ACBZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADN8834ACBZ-R7 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 ADN8834ACBZ-R7 meets industry standards.
7.What is the process for return or replacement of ADN8834ACBZ-R7?
All ADN8834ACBZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADN8834ACBZ-R7, 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 ADN8834ACBZ-R7 part is unused and in its original packaging.
Return procedure for ADN8834ACBZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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