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Analog Devices Inc./Maxim Integrated MAX40658ETA+T
- Part No.:
- MAX40658ETA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX40658ETA+T.pdf
- Description:
- IC TRANSIMPEDANCE 1 CIRC 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,871
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Product details
Overview
MAX40658ETA+T from Analog Devices is a high-speed transimpedance amplifier (TIA) designed for optical distance measurement in LiDAR receivers. It delivers 18.3kΩ transimpedance, 45nARMS input-referred noise at 267MHz, ≥360MHz bandwidth, and integrated 100mA input current clamp - enabling robust pulsed signal recovery in automotive and industrial ranging systems.
For engineers reviewing the MAX40658ETA+T datasheet, MAX40658ETA+T pinout, MAX40658ETA+T application, or MAX40658ETA+T equivalent, this device is selected for low-noise, high-bandwidth photodiode signal conditioning where fast overload recovery, differential output drive capability, and precise offset adjustment are critical.
Technical Context
The MAX40658ETA+T integrates two gain stages: a high-gain transimpedance stage with internal 18.3kΩ feedback and Schottky-based 100mA clamping, followed by a differential voltage amplifier optimized for 150Ω AC-coupled loads. Its input node is ESD-sensitive (±150V HBM), requiring external handling precautions.
Offset adjustment is implemented via current injection into the OFFSET pin (4.7kΩ transimpedance), allowing fine-tuning of input bias current; the IN pin connects directly to photodiode anodes, and CCAP requires a 1µF bypass capacitor to stabilize the internal clamp bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Transimpedance | 18.3kΩ typical - sets gain for converting photodiode current to differential voltage |
| Input-Referred Noise | 45nARMS @ 267MHz - enables detection of weak optical pulses in short-range LiDAR |
| Bandwidth | ≥360MHz - supports sub-nanosecond pulse response for high-resolution time-of-flight measurement |
| Input Clamp Current | 100mA - protects amplifier during laser diode back-reflection or ambient light surges |
| Supply Voltage | +2.97V to +3.63V - compatible with standard 3.3V rail; 70mW total power dissipation |
| Operating Temp | -40°C to +85°C - qualified for under-hood and industrial environmental conditions |
| Differential Output | 75Ω single-ended impedance - requires AC-coupled 150Ω differential termination for optimal noise rejection |
Pinout & Package
MAX40658ETA+T uses an 8-pin 3mm × 3mm TDFN package (package code T833+1F) with exposed pad (EP) connected to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | +3.3V supply input | Must be decoupled with low-ESR capacitors near pin; supplies both gain stages |
| 2 IN | Photodiode anode input | High-impedance summing node; zero ESD protection - requires external handling safeguards |
| 3 CCAP | Clamp bias capacitor connection | Connect 1µF capacitor to GND to stabilize internal Schottky clamp bias voltage |
| 4 OFFSET | Offset adjustment current input | Inject current to correct input offset; +1µA yields −250nA effective offset shift |
| 5, 8, EP GND | Circuit ground reference | Exposed pad must be soldered to PCB ground plane for thermal performance (θJA = 42°C/W) |
| 6 OUT+ | Positive differential output | 75Ω source impedance; increases with rising input current - drives one side of 150Ω diff load |
| 7 OUT- | Negative differential output | 75Ω source impedance; decreases with rising input current - complements OUT+ for common-mode rejection |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise transimpedance | 45nARMS input-referred noise enables high signal-to-noise ratio in low-light LiDAR operation |
| Integrated 100mA clamp | On-die Schottky clamp prevents saturation during high-current optical transients without external components |
| Differential 150Ω output drive | Optimized for direct interface to ADCs or high-speed comparators with minimal layout sensitivity |
| Adjustable input offset | OFFSET pin provides 4.7kΩ transimpedance path to null photodiode dark current mismatch |
| Wide temperature range | Specified from −40°C to +85°C ambient - supports deployment in automotive ADAS and outdoor industrial sensors |
Applications
| Automotive LiDAR Receivers | Industrial Distance Sensors |
|---|---|
Use Scenario: Short-to-medium range time-of-flight (ToF) sensing in autonomous vehicle front/rear radar fusion modules. IC Role / Device Role / Timing Role: Primary transimpedance amplifier converting APD photocurrent into differential voltage for ToF timing circuits. Use Value: 360MHz bandwidth and fast overload recovery enable <1ns pulse resolution; 100mA clamp sustains operation during sunload or multi-laser interference. | Use Scenario: High-precision object detection in robotic palletizing cells with variable ambient lighting. IC Role / Device Role / Timing Role: Signal-conditioning front-end for pulsed infrared distance measurement in safety-rated zone monitoring. Use Value: 45nARMS noise floor ensures reliable detection of weak return signals from low-reflectivity surfaces at 5–15m range. |
| Optical Safety Curtains | Drone Obstacle Avoidance |
Use Scenario: SIL-3 compliant light curtain systems using pulsed IR for personnel protection in CNC machinery. IC Role / Device Role / Timing Role: Critical analog front-end amplifying photodiode current in redundant receiver channels. Use Value: −40°C to +85°C qualification and 100mA clamp ensure fail-safe operation during rapid ambient shifts and EMI events. | Use Scenario: Miniaturized ToF module in UAV navigation systems requiring low mass and high pulse fidelity. IC Role / Device Role / Timing Role: Low-power, high-bandwidth TIA in compact 3mm × 3mm footprint for drone proximity sensing. Use Value: 70mW power dissipation and small TDFN package support battery-constrained flight time and SWaP-C optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transimpedance amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40659ETA+T | 36.6kΩ transimpedance, higher gain, 360MHz bandwidth, same package and pinout | Better suited for longer-range or lower-light LiDAR where higher gain compensates for reduced signal amplitude | Select MAX40659ETA+T when photodiode responsivity or optical path loss demands >18kΩ gain |
| ADA4350ACPZ-R7 | 10kΩ transimpedance, 200MHz bandwidth, no integrated clamp, 16-pin LFCSP | Lacks 100mA clamp and differential output; requires external clamping and level-shifting circuitry | Choose ADA4350ACPZ-R7 only if system-level clamping is already implemented and lower gain suffices |
Compared with MAX40659ETA+T, the MAX40658ETA+T offers lower transimpedance for improved linearity and dynamic range in medium-range LiDAR; versus ADA4350ACPZ-R7, it integrates critical protection and output functionality - reducing BOM count and layout complexity in space-constrained optical receivers.
Availability
MAX40658ETA+T is available at Aetrix Electronics and suitable for automotive LiDAR receivers, industrial distance sensors, and optical safety systems requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for MAX40658ETA+T 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, serving precision instrumentation, communications, and sensing markets since 1965.
The MAX40658ETA+T belongs to Analog Devices' high-speed optical receiver IC portfolio, engineered specifically for time-of-flight LiDAR front-ends demanding ultra-low noise, wide bandwidth, and robust transient protection.
FAQ
What is the exact transimpedance value of the MAX40658ETA+T?
The MAX40658ETA+T has a typical small-signal transimpedance of 18.3kΩ, measured at IIN < 2µAP-P with VCC = 3.3V and CIN = 0.25pF. This value is production-tested at +25°C and guaranteed over temperature via design and characterization. The MAX40658ETA+T does not share the 36.6kΩ transimpedance of the MAX40659ETA+T variant.
Does the MAX40658ETA+T include ESD protection on the IN pin?
No - the MAX40658ETA+T has no on-chip ESD protection diodes on the IN pin to preserve bandwidth and dynamic performance. Its HBM rating is ±150V, requiring strict handling protocols and board-level ESD safeguards. This design choice distinguishes the MAX40658ETA+T from general-purpose TIAs and mandates careful PCB layout and assembly practices.
How is the OFFSET pin used in the MAX40658ETA+T?
The OFFSET pin on the MAX40658ETA+T accepts an external current to adjust input offset current: +1µA injected into OFFSET produces a −250nA effective offset shift at the IN node. The pin is biased to the same voltage as IN, and its transimpedance is 4.7kΩ. This allows precise cancellation of photodiode dark current mismatch without trimming resistors or external op-amps.
What load configuration is required for optimal performance of the MAX40658ETA+T outputs?
The MAX40658ETA+T outputs (OUT+ and OUT−) must drive a 150Ω differential AC-coupled load for best noise rejection and bandwidth. Single-ended use is discouraged; if needed, both outputs must be terminated identically - e.g., 75Ω to VCC - and never to DC ground. The 75Ω source impedance per output is specified under these conditions.
Can the MAX40658ETA+T operate with supply voltages outside 3.3V?
Yes - the MAX40658ETA+T operates across +2.97V to +3.63V (i.e., 3.3V ±10%), consuming 21–30mA typical supply current. Performance parameters including bandwidth and noise are characterized across this range; absolute maximum supply is +4.2V, but operation beyond 3.63V voids specifications and risks reliability. The MAX40658ETA+T is not rated for 5V or dual-supply operation.
MAX40658ETA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Transimpedance
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- -
- Gain Bandwidth Product:
- 520 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- 21mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 3.3 V
- Voltage - Supply Span (Max):
- 3.3 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (3x3)
MAX40658ETA+T FAQ
1.How can I place an order for MAX40658ETA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40658ETA+T 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 MAX40658ETA+T reliable?
The price and inventory of MAX40658ETA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40658ETA+T is usually 5 days.
3.What payment methods are accepted for MAX40658ETA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40658ETA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40658ETA+T?
MAX40658ETA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40658ETA+T 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 MAX40658ETA+T?
For technical support, including MAX40658ETA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40658ETA+T requirements.
6.How does Aetrix verify that MAX40658ETA+T is sourced from the original manufacturer or authorized distributors?
All MAX40658ETA+T 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 MAX40658ETA+T meets industry standards.
7.What is the process for return or replacement of MAX40658ETA+T?
All MAX40658ETA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40658ETA+T, 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 MAX40658ETA+T part is unused and in its original packaging.
Return procedure for MAX40658ETA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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