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Texas Instruments OPA1S2384IDRCR
- Part No.:
- OPA1S2384IDRCR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
OPA1S2384IDRCR.pdf
- Description:
- IC TRANSIMPEDANCE 2 CIRC 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,375
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Product details
Overview
OPA1S2384IDRCR from Texas Instruments is a 250-MHz CMOS transimpedance amplifier (TIA) with integrated SPST switch and rail-to-rail I/O, designed for photodiode signal conditioning in burst-mode optical receivers. It delivers 150 V/μs slew rate, 4 Ω on-resistance, 1 pC charge injection, and operates from +2.7 V to +5.5 V single supply - enabling high-fidelity signal capture in EPON/GPON RSSI monitoring.
For engineers reviewing the OPA1S2384IDRCR datasheet, OPA1S2384IDRCR pinout, OPA1S2384IDRCR application, or OPA1S2384IDRCR equivalent, this page provides verified functional context, validated pin roles, confirmed transimpedance and sample-and-hold use cases, and two rigorously cross-checked alternative parts for low-voltage, high-bandwidth photodiode front-ends.
Technical Context
The OPA1S2384IDRCR integrates two FET-input op amps and a fast CMOS SPST switch in a single 10-pin SON package. Channel A functions as a wideband transimpedance amplifier (250 MHz small-signal BW, 6 nV/√Hz input voltage noise), while Channel B serves as a buffer or post-gain stage. The internal switch connects IN_S to +IN_B and is controlled by the SC pin.
Its active-high switch logic (SC = high closes switch) distinguishes it from the OPA1S2385. The device supports flexible configurations including external hold capacitor placement, programmable transimpedance gain, and post-amplification - all within a 3-mm × 3-mm footprint optimized for space-constrained optical line card designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 250 MHz at G = 1, enabling accurate amplification of fast optical bursts up to ~125 MHz Nyquist-limited signals. |
| Slew rate | 150 V/μs at 4-V step, supporting clean large-signal transient response without slewing distortion in RSSI detection. |
| Input bias current | ±3 pA typical, critical for preserving signal integrity when amplifying low-current photodiode outputs. |
| On-resistance (Ron) | 4 Ω typical, minimizing voltage drop and gain error during switch-closed sampling in S/H circuits. |
| Charge injection | 1 pC typical, directly limiting hold-step error and settling time in precision sample-and-hold applications. |
| Supply range | +2.7 V to +5.5 V single supply, compatible with common low-voltage optical subsystem rails. |
| Quiescent current | 9.2 mA per amplifier, balancing speed and power efficiency in always-on burst-detection paths. |
Pinout & Package
OPA1S2384IDRCR is housed in a 3-mm × 3-mm SON-10 (DRC) package with wettable flanks, rated for –40°C to +85°C operation and optimized for automated optical module assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Transimpedance amplifier output | Primary analog output node for photodiode current-to-voltage conversion; drives external hold capacitor or ADC driver stage. |
| 2 (IN S) | Switch input terminal | Connects photodiode or signal source to +IN B when switch is closed; referenced to V– (ground). |
| 3 (–IN A) | Inverting input of TIA channel A | Feedback node for transimpedance configuration; connected to photodiode cathode in standard topology. |
| 4 (+IN A) | Noninverting input of TIA channel A | Connected to bias voltage (e.g., V+/2) to set common-mode operating point for rail-to-rail input swing. |
| 5 (V–) | Negative supply rail | Ground reference for single-supply operation; must be low-impedance to minimize noise coupling into sensitive inputs. |
| 6 (+IN B) | Noninverting input of buffer channel B | Receives switched signal from IN_S; configured as unity-gain follower to isolate hold capacitor from load. |
| 7 (–IN B) | Inverting input of buffer channel B | Connected to OUT B for unity-gain configuration; ensures precise voltage replication with minimal offset. |
| 8 (OUT B) | Buffer output | Final buffered output for ADC interface or downstream processing; maintains signal fidelity during hold phase. |
| 9 (V+) | Positive supply rail | +2.7 V to +5.5 V input; requires local 100-nF ceramic bypass near pin to suppress high-frequency supply noise. |
| 10 (SC) | Switch control input | Active-high logic input (OPA1S2384-specific); TTL/CMOS-compatible; controls timing of sample aperture with <20 ns turn-on. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output | Enables full dynamic range utilization from 0 V to V+ in single-supply optical front-ends, eliminating level-shifting circuitry. |
| Integrated SPST switch | Eliminates need for external analog switch IC, reducing board area, parasitic capacitance, and signal path discontinuities. |
| Low input bias current (3 pA) | Preserves accuracy in high-impedance photodiode interfaces where leakage would otherwise dominate signal current. |
| High input impedance (10¹³ Ω || 2 pF) | Minimizes loading of photodiode junction capacitance, maintaining bandwidth and reducing noise gain peaking. |
| Fast settling (30 ns to 0.1%) | Supports high repetition-rate sampling in burst-mode systems such as GPON upstream channels with ≤ 125 ns guard bands. |
Applications
| Optical Signal Strength Monitoring | Burst-Mode RSSI Detection |
|---|---|
|
Use Scenario: Real-time measurement of received optical power in passive optical networks (PON) like EPON/GPON, where upstream bursts arrive asynchronously with variable amplitude. IC Role / Device Role / Timing Role: OPA1S2384IDRCR acts as transimpedance amplifier + sample-and-hold front-end, converting photodiode current to voltage and capturing peak amplitude during each burst window. Use Value: 250-MHz bandwidth and 150 V/μs slew rate ensure faithful reproduction of nanosecond-scale optical pulses without distortion or droop. |
Use Scenario: Accurate relative signal strength indication in time-division multiple access (TDMA) optical receivers, requiring rapid acquisition and hold of burst envelope peaks. IC Role / Device Role / Timing Role: OPA1S2384IDRCR performs synchronized sampling via SC-controlled switch, freezing the TIA output at burst peak for downstream RSSI ADC conversion. Use Value: 1 pC charge injection and 4 Ω Ron minimize hold-step error and settling time, enabling sub-100 ns aperture accuracy. |
| Photodiode-Based Charge Amplification | High-Speed Sample-and-Hold Circuit |
|
Use Scenario: Converting low-level photocurrent from avalanche photodiodes (APDs) or PIN diodes into measurable voltage in laser rangefinders or LIDAR receivers. IC Role / Device Role / Timing Role: OPA1S2384IDRCR operates as low-noise transimpedance amplifier with external feedback resistor and capacitor, optimizing SNR for weak optical signals. Use Value: 6 nV/√Hz input voltage noise and 3 pA input bias current maximize signal-to-noise ratio for femtoampere-level photocurrents. |
Use Scenario: Capturing and holding fast analog waveforms (e.g., laser pulse envelopes, RF detector outputs) prior to digitization in test equipment or communication receivers. IC Role / Device Role / Timing Role: OPA1S2384IDRCR implements track-and-hold using Channel A as input buffer, internal switch as sampling gate, and Channel B as hold buffer. Use Value: Integrated architecture eliminates inter-chip timing skew and layout-induced feedthrough, achieving <10 ns effective aperture uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transimpedance amplifier with integrated switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1S2385IDRCR | Identical architecture and specs except SC pin logic is active-low (vs active-high in OPA1S2384IDRCR). | Requires inverted control signal timing; otherwise drop-in compatible in same PCB layout and optical front-end topology. | Select OPA1S2385IDRCR only if system controller provides active-low sample strobes or logic inversion is preferred. |
| LMH6629MF/NOPB | Discrete ultra-low-noise op amp (0.94 nV/√Hz) without integrated switch; requires external analog switch and buffer stages. | Lacks monolithic sample-and-hold capability; adds ≥3 components, layout complexity, and inter-stage timing uncertainty. | Choose LMH6629MF/NOPB only when ultimate voltage noise performance outweighs integration benefits and board space constraints. |
Compared with OPA1S2385IDRCR, the OPA1S2384IDRCR offers identical performance but simplifies timing design with active-high switch control; compared with LMH6629MF/NOPB, it trades 1.3 dB higher input voltage noise for guaranteed sub-20 ns aperture timing, reduced BOM count, and smaller footprint in burst-mode optical receivers.
Availability
OPA1S2384IDRCR is available at Aetrix Electronics and suitable for optical networking, burst-mode RSSI detection, and photodiode monitoring applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA1S2384IDRCR 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
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in high-speed amplifiers, data converters, and interface solutions for communications and industrial markets.
The OPA1S2384IDRCR belongs to TI's high-bandwidth, low-noise operational amplifier product line, engineered specifically for single-supply photodiode front-ends in fiber-optic access networks and precision analog sampling systems.
FAQ
What is the function of the SC pin on the OPA1S2384IDRCR?
The SC (Switch Control) pin on the OPA1S2384IDRCR is an active-high digital input that controls the internal SPST CMOS switch. When SC is driven high (≥2.0 V at 3.3 V supply), the switch closes, connecting IN_S to +IN_B. This enables synchronous sampling in sample-and-hold or signal routing applications. The OPA1S2384IDRCR differs from the OPA1S2385IDRCR in this logic polarity.
Can the OPA1S2384IDRCR operate from a 3.3-V supply?
Yes, the OPA1S2384IDRCR is fully specified for operation from +2.7 V to +5.5 V single supply. At 3.3 V, it delivers 250-MHz small-signal bandwidth, 110 V/μs slew rate (2-V step), and 30 ns settling time to 0.1%, making it ideal for low-voltage optical modules. Quiescent current is 9.2 mA per amplifier under these conditions.
How does the OPA1S2384IDRCR support photodiode transimpedance applications?
The OPA1S2384IDRCR supports photodiode transimpedance applications through its FET-input architecture (3 pA bias current, 10¹³ Ω input impedance), rail-to-rail input/output swing, and low 6 nV/√Hz input voltage noise. Its high 250-MHz bandwidth preserves fast optical pulse fidelity, while integrated switching enables direct connection to hold capacitors for burst amplitude capture - all in one OPA1S2384IDRCR device.
What is the maximum capacitive load the OPA1S2384IDRCR can drive stably?
The OPA1S2384IDRCR is characterized to drive ≥100 pF capacitive loads in unity-gain configuration without external compensation. Figure 11 of the datasheet shows stable frequency response up to 100 pF with recommended series resistance (RS). For loads >100 pF, adding a 10–20 Ω series resistor at the OUT A pin improves phase margin and suppresses ringing - a proven technique validated across multiple OPA1S2384IDRCR application circuits.
Is thermal shutdown protection included in the OPA1S2384IDRCR?
Yes, the OPA1S2384IDRCR includes an on-chip thermal shutdown circuit that activates at +160°C junction temperature to protect against overtemperature failure. Operation resumes automatically when junction temperature falls below +140°C. For reliable continuous operation, TI recommends limiting maximum junction temperature to +125°C - achievable via proper PCB copper pour, thermal vias, and ambient temperature control in optical module enclosures housing the OPA1S2384IDRCR.
OPA1S2384IDRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Transimpedance
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 150V/µs
- Gain Bandwidth Product:
- 100 MHz
- -3db Bandwidth:
- 250 MHz
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 9.2mA (x2 Channels)
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
OPA1S2384IDRCR FAQ
1.How can I place an order for OPA1S2384IDRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA1S2384IDRCR 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 OPA1S2384IDRCR reliable?
The price and inventory of OPA1S2384IDRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA1S2384IDRCR is usually 5 days.
3.What payment methods are accepted for OPA1S2384IDRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA1S2384IDRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA1S2384IDRCR?
OPA1S2384IDRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA1S2384IDRCR 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 OPA1S2384IDRCR?
For technical support, including OPA1S2384IDRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA1S2384IDRCR requirements.
6.How does Aetrix verify that OPA1S2384IDRCR is sourced from the original manufacturer or authorized distributors?
All OPA1S2384IDRCR 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 OPA1S2384IDRCR meets industry standards.
7.What is the process for return or replacement of OPA1S2384IDRCR?
All OPA1S2384IDRCR units undergo pre-shipment inspection (PSI). If there is an issue with OPA1S2384IDRCR, 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 OPA1S2384IDRCR part is unused and in its original packaging.
Return procedure for OPA1S2384IDRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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