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Texas Instruments REF5050MDREP
- Part No.:
- REF5050MDREP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF5050MDREP.pdf
- Description:
- IC VREF SERIES 0.05% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,760
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Product details
Overview
REF5050MDREP from Texas Instruments is a military-grade, low-noise, very low-drift precision voltage reference delivering 5.000 V output with ±0.05% initial accuracy, 5 ppm/°C max temperature drift, ±10 mA sourcing/sinking capability, and 15 μVPP (0.1–10 Hz) output noise. It operates from –55°C to +125°C in high-reliability data acquisition, ATE, and precision instrumentation systems.
For engineers reviewing the REF5050MDREP datasheet, REF5050MDREP pinout, REF5050MDREP application, or REF5050MDREP equivalent, this page delivers verified specifications, SOIC-8 package layout, military-temperature performance context, TRIM/NR noise-filtering implementation guidance, and validated alternative options for extended-life-cycle design continuity.
Technical Context
The REF5050MDREP implements a proprietary bandgap core with buffered output amplifier enabling bidirectional current flow (±10 mA), robust line regulation (≤1 ppm/V), and load regulation (≤30 ppm/mA). Its TEMP pin provides a calibrated 575 mV ±15°C offset at 25°C with 2.64 mV/°C slope for on-die temperature monitoring.
It supports noise reduction via external capacitor on the TRIM/NR pin-1 µF yields ~21 dB broadband attenuation and halves 0.1–10 Hz output noise-while requiring 1–50 µF output capacitance (ESR 1–1.5 Ω) for stability. Dropout is 0.2 V minimum (VIN ≥ 5.2 V), with quiescent current of 0.8–1.25 mA across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±0.05% at 25°C; enables direct interface with 5-V ADC references (e.g., ADS8326) without scaling. |
| Temp Drift | ≤5 ppm/°C max (–55°C to +125°C); contributes ≤±0.3 mV error over full range-critical for 16-bit+ systems. |
| Noise (0.1–10 Hz) | 15 μVPP; limits effective resolution in precision DAQ; reduced to ~7.5 μVPP with 1 µF on TRIM/NR pin. |
| Output Current | ±10 mA; supports driving ADC reference inputs, op-amp bias networks, and small DAC loads directly. |
| Supply Range | VIN = 5.2 V to 18 V; 0.2 V dropout allows operation from tightly regulated 5.5-V rails in space-constrained designs. |
| Operating Temp | –55°C to +125°C; qualified per extended product (EP) lifecycle for aerospace, defense, and downhole industrial use. |
| Quiescent Current | 0.8–1.25 mA; stable across temperature-enables predictable power budgeting in battery-backed or thermally isolated systems. |
Pinout & Package
REF5050MDREP is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with exposed pad not electrically connected. Pin 1 and Pin 8 are DNC (do not connect); Pin 7 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Power input | Accepts 5.2–18 V supply; requires 1–10 µF bypass capacitor to suppress PSRR degradation above 1 kHz. |
| TEMP (Pin 3) | Temperature monitor output | Provides 575 mV + 2.64 mV/°C analog voltage; must be buffered (e.g., OPA333) before ADC sampling to avoid loading error. |
| GND (Pin 4) | System ground reference | Low-impedance return path for output current and internal bias; must be tied to clean analog ground plane. |
| TRIM/NR (Pin 5) | Bandgap access & noise filter node | Connect 1 µF to GND to reduce 0.1–10 Hz noise by 50%; also enables ±15 mV output adjustment via external resistor divider. |
| VOUT (Pin 6) | Precision voltage output | Delivers 5.000 V ±0.05%; requires 1–50 µF output capacitor (ESR 1–1.5 Ω) for stability and low-noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional output drive | ±10 mA sourcing/sinking eliminates need for external buffer in most 5-V reference applications. |
| TRIM/NR noise filtering | 1 µF on TRIM/NR reduces 0.1–10 Hz noise by half-verified in SBOS471B Figure 13 and Table 2. |
| Military temperature qualification | –55°C to +125°C operation with controlled baseline, extended PCN, and full traceability per EP program. |
| Integrated temperature sensor | TEMP pin outputs calibrated 575 mV ±15°C at 25°C with 2.64 mV/°C slope-usable for thermal derating or compensation. |
| Low dropout & wide VIN range | Operates with only 0.2 V headroom (VIN ≥ 5.2 V) up to 18 V-supports both low-voltage and high-reliability supply architectures. |
Applications
| High-Precision Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: 16-bit SAR ADC (e.g., ADS8326) in environmental monitoring system requiring <±1 LSB error over –40°C to +85°C. IC Role / Device Role / Timing Role: Primary reference source for ADC conversion-sets full-scale voltage and defines quantization step size. Use Value: 5 ppm/°C drift ensures <±0.8 LSB error contribution across temperature; 15 μVPP noise maintains >15.5 ENOB. |
Use Scenario: Modular ATE mainframe supplying calibrated reference to multiple DUT interface boards under thermal stress. IC Role / Device Role / Timing Role: Stable 5-V reference for programmable gain instrumentation amplifiers and comparator thresholds. Use Value: ±0.05% initial accuracy eliminates per-board calibration; ±10 mA drive supports parallel loading across 4–6 channels. |
| Industrial Process Control | Medical Instrumentation |
|
Use Scenario: Loop-powered 4–20 mA transmitter with HART modulation, operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Reference for DAC generating precise current setpoint; also supplies bias to isolation amplifier. Use Value: 125°C max junction rating and 5 ppm/°C drift ensure long-term calibration stability in uncooled enclosures. |
Use Scenario: Portable ECG front-end requiring ultra-low-noise, drift-free reference for 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Low-noise 5-V reference for ADC reference input and analog signal chain biasing. Use Value: 15 μVPP (0.1–10 Hz) noise directly limits input-referred noise floor; TRIM/NR pin enables further reduction if needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5050IDR | Same 5.000 V output, 5 ppm/°C drift, and SOIC-8 package-but commercial grade (–40°C to +125°C), no EP lifecycle controls. | Lacks military temp range, extended PCN, and traceability; unsuitable for aerospace or long-lifecycle industrial deployments. | Select REF5050IDR only for cost-sensitive, non-mission-critical designs where full EP qualifications are unnecessary. |
| ADR4550BRZ | 5.000 V output, 3 ppm/°C max drift, 12 μVPP noise-but uses MSOP-8 package (3.0 × 3.0 mm), higher 1.15 mA IQ. | Smaller footprint enables dense PCB layouts; lower drift suits 18-bit+ systems, but MSOP requires rework for SOIC footprints. | Choose ADR4550BRZ when drift budget is tighter and board space is constrained-verify thermal derating for 125°C operation. |
Compared with REF5050MDREP, REF5050IDR sacrifices military temperature range and EP lifecycle assurance for lower cost, while ADR4550BRZ trades SOIC compatibility and quiescent current for superior drift and compact packaging-neither is pin-compatible, requiring layout revision.
Availability
REF5050MDREP is available at Aetrix Electronics and suitable for high-reliability data acquisition, automated test equipment, and industrial process control applications requiring stable component supply across extended product lifecycles.
Supply support for REF5050MDREP 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 leader specializing in analog and embedded processing technologies, with decades of heritage in precision analog ICs and high-reliability components.
The REF50xx family-including REF5050MDREP-is designed specifically for high-precision data acquisition systems demanding ultra-low drift, low noise, and extended temperature operation in mission-critical environments.
FAQ
What is the maximum operating temperature for REF5050MDREP?
The REF5050MDREP is specified for continuous operation from –55°C to +125°C ambient temperature, with junction temperature limited to 150°C. This military-grade temperature range is validated per TI's extended product (EP) program and supports deployment in avionics, downhole tools, and industrial control cabinets without forced cooling.
Can REF5050MDREP drive an ADS8326 ADC reference input directly?
Yes, REF5050MDREP can directly drive the REFIN pin of the ADS8326. Its ±10 mA output current exceeds the ADS8326's 1.5 mA typical reference input current, and its 5.000 V output matches the ADC's full-scale requirement. Use a 1–10 µF ceramic bypass capacitor on VIN and a 1–50 µF output capacitor (ESR 1–1.5 Ω) on VOUT for optimal noise and stability.
How does the TRIM/NR pin reduce noise in REF5050MDREP?
The TRIM/NR pin connects directly to the internal bandgap node. Adding a 1 µF capacitor from TRIM/NR to GND forms a low-pass filter with internal resistors, attenuating broadband noise by ~21 dB and halving the 0.1–10 Hz output noise-from 15 μVPP to ~7.5 μVPP. This is documented in SBOS471B Section 7.3.4 and Figure 24.
Is REF5050MDREP pin-compatible with REF5050IDR?
Yes, REF5050MDREP and REF5050IDR share identical SOIC-8 pinout, electrical specifications (5.000 V, 5 ppm/°C, ±10 mA), and functional behavior. The sole differences are qualification level (EP vs. commercial), temperature range (–55°C to +125°C vs. –40°C to +125°C), and lifecycle controls-not physical or electrical compatibility.
What is the purpose of the TEMP pin on REF5050MDREP?
The TEMP pin (Pin 3) outputs a temperature-dependent voltage: VTEMP = 575 mV + 2.64 mV/°C at 25°C. It provides on-die temperature monitoring with ±15°C accuracy-sufficient for thermal derating or coarse compensation-but requires buffering (e.g., OPA333) due to its ~60 kΩ output impedance to avoid measurement error.
REF5050MDREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 6.5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6µVpp/V
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 5.2V ~ 18V
- Current - Supply:
- 1.25mA
- Current - Cathode:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF5050MDREP FAQ
1.How can I place an order for REF5050MDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for REF5050MDREP 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 REF5050MDREP reliable?
The price and inventory of REF5050MDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF5050MDREP is usually 5 days.
3.What payment methods are accepted for REF5050MDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF5050MDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF5050MDREP?
REF5050MDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF5050MDREP 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 REF5050MDREP?
For technical support, including REF5050MDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF5050MDREP requirements.
6.How does Aetrix verify that REF5050MDREP is sourced from the original manufacturer or authorized distributors?
All REF5050MDREP 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 REF5050MDREP meets industry standards.
7.What is the process for return or replacement of REF5050MDREP?
All REF5050MDREP units undergo pre-shipment inspection (PSI). If there is an issue with REF5050MDREP, 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 REF5050MDREP part is unused and in its original packaging.
Return procedure for REF5050MDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF5050MDREP Tags
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