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Analog Devices Inc./Maxim Integrated DS4830T+
- Part No.:
- DS4830T+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
DS4830T+.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,221
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Product details
Overview
The DS4830T+ from Maxim Integrated is a 16-bit optical microcontroller designed for closed-loop control of laser diodes and temperature in fiber-optic transceivers and PON systems. It integrates a 10MHz CPU core, 32kWords flash + 4kWords ROM program memory, 1kWords SRAM, eight 12-bit DACs, ten 12-bit PWMs, a 13-bit ADC with 26-input mux, and dual I²C interfaces (master/slave) - enabling real-time calibration, monitoring, and feedback control in XFP, SFP+, and GPON OLT/ONU modules.
For engineers reviewing the DS4830T+ datasheet, DS4830T+ pinout, DS4830T+ application, or DS4830T+ equivalent, key selection considerations include its integrated optical front-end (DAC/PWM/ADC/temperature sensing), dual-protocol serial interfaces (I²C master/slave + Maxim 3-wire), JTAG debug support, and 40-pin TQFN package with 31 GPIOs - all operating from 2.97V to 3.63V across –40°C to +85°C.
Technical Context
The DS4830T+ implements a 16-bit RISC microcontroller core with zero-pipeline, single-cycle instruction execution, supported by 16 accumulators and a 16-level hardware stack. Its analog subsystem includes a 13-bit ADC (27ksps, 26-channel mux), eight buffered 12-bit DACs (±1.25% internal reference accuracy), and an 8-bit fast comparator (1.6μs comparison time, ±2 LSB INL).
Dual communication stacks coexist: a password-protected I²C slave interface (for host MCU communication and in-system reprogramming) and an independent I²C master interface (for daisy-chaining external digital temperature sensors or laser drivers like MAX3798). The device also supports SPI (master/slave) and Maxim's proprietary 3-wire protocol for laser driver control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 16-bit RISC, 10MHz max core clock (20MHz peripheral clock), single-cycle execution, 16 accumulators, 16-level hardware stack |
| Memory | 32kWords flash (user program), 4kWords ROM (bootloader/debug), 1kWords SRAM (data variables) |
| DAC | 8 × 12-bit buffered voltage DACs; ±1.25% internal reference accuracy; 10µs settling time; supports REFINA/REFINB or internal 2.5V ref |
| ADC | 13-bit SAR ADC, 26-input mux, 27ksps max sample rate; full-scale options: 0.6V/1.2V/2.4V/4.8V; ±2°C internal temp sensor error |
| PWM | 10 × 12-bit PWM outputs; supports 4-channel TECC H-bridge control; 1MHz switching frequency; 7–12-bit resolution programmable |
| Temperature Sensing | Internal ±2°C sensor (0.0625°C resolution); supports two external diode-connected transistors or digital sensors via I²C master |
| Operating Range | 2.97V to 3.63V supply; –40°C to +85°C ambient; brownout monitor at 2.7V with 70mV hysteresis |
Pinout & Package
DS4830T+ is housed in a 5mm × 5mm, 40-pin TQFN package (exposed pad, RoHS-compliant, package code T4055+2) with 31 configurable GPIO pins, dual I²C interfaces, dedicated 3-wire laser control (MCL/MCS/MDIO), JTAG debug (TCK/TDI/TDO/TMS/RST), and analog inputs/outputs routed to optimized pin groups for noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Active-low reset input | Open-drain, high-impedance at power-up; used for JTAG and system reset; requires external pullup |
| SCL / SDA | I²C slave clock/data | Open-drain, 400kHz max; supports password-protected in-system programming and host MCU communication |
| MCL / MCS / MDIO | Maxim 3-wire laser driver interface | Push-pull outputs; dedicated protocol for controlling MAX3798-family laser drivers with precise timing (1MHz MCL) |
| GP[15:0] | General-purpose I/O / ADC inputs | 31 total GPIOs; 16 pins double as ADC single-ended inputs (GP0–GP15); 8 support differential temp sensing (GP8–GP11, GP14–GP15) |
| DACPW[7:0] | DAC output channels | 8 dedicated push-pull DAC outputs; each configurable with REFINA, REFINB, or internal 2.5V reference |
| PW[9:0] | PWM output channels | 10 PWM outputs; PW8/PW9 are extra-strong drive (9Ω high-side, 8Ω low-side) for TECC H-bridge control |
| SHEN[1:0] | Sample/hold enable | Two independent enables for dual simultaneous sampling; critical for synchronized ADC acquisition in optical monitoring |
| REFINA / REFINB | External DAC/ADC reference inputs | High-impedance analog inputs; support 1V–2.5V external references; used to set full-scale range for DACs and ADC channels |
Key Features
| Feature | Design Value |
|---|---|
| Optical-specific analog integration | Co-located 12-bit DACs, 12-bit PWMs, 13-bit ADC, and fast comparator enable closed-loop bias/TEC control without external signal conditioning |
| Dual I²C interfaces (master + slave) | Independent master I²C controls external digital temperature sensors or laser drivers; slave I²C allows secure host MCU access and firmware updates |
| Password-protected flash security | 16-word password stored at 0010h–001Fh; PWL bit blocks utility ROM access (debug, programming) unless correct password is supplied |
| JTAG + utility ROM debug ecosystem | Integrated JTAG port with in-circuit debug and programming; 4kWords utility ROM includes bootloader, self-test, and callable flash routines |
| Thermal management architecture | Internal ±2°C sensor + support for two remote diode sensors; differential rail-to-rail ADC inputs optimize precision for thermistor/diode voltage measurement |
Applications
| GPON OLT Transmitter Control | XFP/SFP+ Laser Bias Calibration |
|---|---|
Use Scenario: Real-time monitoring and adjustment of laser bias current and modulation current in GPON optical line terminals under varying temperature and aging conditions. IC Role / Device Role / Timing Role: DS4830T+ acts as the optical controller IC, executing closed-loop algorithms using its 13-bit ADC (for photodiode feedback), 8 DACs (for bias/modulation DACs), and 10 PWMs (for TEC control). Use Value: Enables <1% bias current drift over temperature, meeting GR-468 reliability requirements for Class I laser safety compliance. | Use Scenario: Dynamic calibration of transmitter optical power (TOP) and extinction ratio (ER) in hot-pluggable XFP and SFP+ modules during initialization and field operation. IC Role / Device Role / Timing Role: DS4830T+ serves as the embedded optical microcontroller, performing real-time ADC sampling of monitor photodiodes and driving DACs/PWMs to maintain specified optical parameters per SFF-8472. Use Value: Achieves ±0.5dB optical power stability across –5°C to +70°C, eliminating need for external calibration EEPROM or manual tuning. |
| 10G-EPON Triplexer Monitoring | QSFP 40G/100G Module Thermal Management |
Use Scenario: Simultaneous monitoring of upstream/downstream wavelengths and RF video channel in triplexer-based 10G-EPON ONUs with integrated RF overlay. IC Role / Device Role / Timing Role: DS4830T+ functions as the multi-channel analog front-end controller, using its 26-input ADC mux and dual sample/hold to acquire three independent optical/RF signals synchronously. Use Value: Supports concurrent 3-channel acquisition at 27ksps, enabling real-time SNR optimization and automatic gain control without host processor intervention. | Use Scenario: Active thermal regulation of four parallel VCSEL/laser arrays and associated driver ICs in QSFP+ and QSFP28 modules. IC Role / Device Role / Timing Role: DS4830T+ operates as the distributed thermal manager, reading internal and external temperature sensors and driving four independent 12-bit PWMs to control TEC elements or fan speed. Use Value: Maintains laser array junction temperature within ±0.5°C via 4-channel H-bridge PWM control, reducing wavelength drift to <±25pm over full operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar optical microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX32660 | 32-bit ARM Cortex-M4F core, lower analog integration (no integrated DACs/PWMs), no Maxim 3-wire interface, higher power consumption (38mA active) | Requires external DAC/PWM ICs for laser bias/TEC control; better suited for host-controlled optical modules with complex protocol stacks | Select MAX32660 only when 32-bit processing, BLE connectivity, or cryptographic acceleration is required - not for direct DS4830T+ replacement |
| ADuC7024 | 12-bit ARM7TDMI core, integrated 12-bit DACs/PWMs/ADC, but lacks I²C master, 3-wire interface, and optical-specific features (e.g., diode temp sensing support) | No native support for Maxim laser drivers or remote diode temperature sensing; limited to basic analog control loops | Choose ADuC7024 only for legacy industrial sensor nodes where optical interface compatibility is not needed |
Compared with MAX32660 and ADuC7024, the DS4830T+ delivers purpose-built optical control with integrated DAC/PWM/ADC, dual I²C, and Maxim 3-wire - eliminating BOM cost and layout complexity of discrete analog signal chains while enabling deterministic real-time response critical for laser safety compliance.
Availability
DS4830T+ is available at Aetrix Electronics and suitable for GPON OLT, XFP/SFP+ transceivers, 10G-EPON triplexers, and QSFP 40G/100G modules requiring stable component supply, long-term lifecycle assurance, and qualified optical-grade performance.
Supply support for DS4830T+ 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
Maxim Integrated (now part of Analog Devices) designs high-performance analog, mixed-signal, and optical ICs for communications, computing, and industrial markets.
The DS4830T+ belongs to Maxim's optical microcontroller product line, engineered specifically for closed-loop laser diode and TEC control in fiber-optic modules - integrating precision analog peripherals, optical protocol interfaces, and secure firmware execution in a single chip.
FAQ
What is the primary function of the DS4830T+ in optical transceiver designs?
The DS4830T+ serves as a dedicated optical microcontroller for closed-loop control of laser bias current, modulation current, and thermoelectric cooler (TEC) in fiber-optic transceivers. It executes real-time calibration algorithms using its integrated 13-bit ADC, eight 12-bit DACs, and ten 12-bit PWMs - enabling precise optical power stabilization and wavelength control without external analog components. This functionality is central to DS4830T+'s role in SFP+, XFP, and QSFP modules.
Does the DS4830T+ support both I²C master and slave modes simultaneously?
Yes, the DS4830T+ integrates two independent I²C interfaces: one dedicated slave interface (SCL/SDA pins) for host MCU communication and password-protected in-system reprogramming, and a separate master interface (MSCL/MSDA pins) for controlling external digital temperature sensors or laser drivers like the MAX3798 family. Both operate concurrently without resource conflict, enabling DS4830T+ to manage internal calibration while interfacing with external devices.
How does the DS4830T+ handle temperature measurement for laser diode control?
The DS4830T+ provides dual-path temperature sensing: an on-die sensor with ±2°C accuracy and 0.0625°C resolution, plus support for two external diode-connected transistors via differential ADC inputs (GP8–GP11, GP14–GP15). Its ADC front-end includes rail-to-rail differential inputs and programmable full-scale ranges (0.6V–4.8V), enabling high-precision junction temperature measurement critical for DS4830T+'s TEC and laser bias compensation algorithms.
What packaging and thermal characteristics apply to the DS4830T+?
The DS4830T+ uses a 5mm × 5mm, 40-pin TQFN package (T4055+2) with exposed thermal pad connected to GND. It operates from –40°C to +85°C ambient, with internal brownout detection at 2.7V (70mV hysteresis) and guaranteed flash endurance of 20,000 write cycles. The package supports standard reflow profiles (peak 260°C) and requires 1µF + 10nF bypass capacitors on VDD, REG18, and REG285 - all verified in DS4830T+ production validation.
Can the DS4830T+ be programmed and debugged in-circuit?
Yes, the DS4830T+ supports full in-circuit debug and programming via its integrated JTAG interface (TCK/TDI/TDO/TMS/RST pins) and utility ROM bootloader. Third-party C compilers and debug tools can perform flash programming, real-time variable inspection, and breakpoint execution directly through JTAG. Password protection (PWL bit + 16-word key) secures access, but once authenticated, DS4830T+ enables complete firmware development without removing the device from the board.
DS4830T+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 40-WFQFN Exposed Pad
- Series:
- MAXQ®
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- MAXQ20
- Core Size:
- 16-Bit
- Speed:
- 10MHz
- Connectivity:
- 3-Wire, I2C, SPI
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 31
- Program Memory Size:
- 64KB (32K x 16)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 16
- Voltage - Supply (Vcc/Vdd):
- 2.97V ~ 3.63V
- Data Converters:
- A/D 18x13b; D/A 8x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DS4830T+ FAQ
1.How can I place an order for DS4830T+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS4830T+ 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 DS4830T+ reliable?
The price and inventory of DS4830T+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS4830T+ is usually 5 days.
3.What payment methods are accepted for DS4830T+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS4830T+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS4830T+?
DS4830T+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS4830T+ 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 DS4830T+?
For technical support, including DS4830T+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS4830T+ requirements.
6.How does Aetrix verify that DS4830T+ is sourced from the original manufacturer or authorized distributors?
All DS4830T+ 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 DS4830T+ meets industry standards.
7.What is the process for return or replacement of DS4830T+?
All DS4830T+ units undergo pre-shipment inspection (PSI). If there is an issue with DS4830T+, 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 DS4830T+ part is unused and in its original packaging.
Return procedure for DS4830T+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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