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Analog Devices Inc. LT1634BIS8-4.096#TRPBF
- Part No.:
- LT1634BIS8-4.096#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1634BIS8-4.096#TRPBF.pdf
- Description:
- IC VREF SHUNT 0.05% 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LT1634BIS8-4.096#TRPBF from Analog Devices (formerly Linear Technology) is a micropower precision shunt voltage reference delivering a stable 4.096V output with ±0.05% initial accuracy, 25ppm/°C max temperature coefficient, and 15µA minimum operating current. It operates across –40°C to +85°C in an 8-lead SOIC package and is used in high-resolution data acquisition systems requiring low-drift, low-noise references for 12-bit ADCs and DACs.
For engineers reviewing the LT1634BIS8-4.096#TRPBF datasheet, LT1634BIS8-4.096#TRPBF pinout, LT1634BIS8-4.096#TRPBF application, or LT1634BIS8-4.096#TRPBF equivalent, key selection criteria include industrial-temperature-grade shunt reference performance, dynamic impedance under 1.5Ω at 20µA–2mA, reverse breakdown stability over load current, and compatibility with capacitive loads without external compensation.
Technical Context
The LT1634BIS8-4.096#TRPBF employs a trimmed thin-film resistor bandgap architecture to achieve 0.05% initial voltage accuracy and uses advanced curvature correction to limit temperature drift to ≤25ppm/°C across –40°C to +85°C. Its shunt topology requires external current sourcing and functions as a two-terminal device with GND and VOUT terminals.
It exhibits <1.5Ω dynamic impedance (20µA–2mA), 30µVP-P low-frequency noise (0.1Hz–10Hz), and hysteresis of 160ppm over full temperature cycling. The device remains stable with capacitive loads and does not require an output compensation capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±0.05% initial accuracy ensures ≤±2.05mV absolute error at 25°C. |
| Temp Coefficient | ≤25ppm/°C max over –40°C to +85°C; guarantees ≤±10.2mV total drift across full range. |
| Min Operating Current | 15µA; enables ultra-low-power operation in battery-powered portable meters and sensor nodes. |
| Dynamic Impedance | ≤1.5Ω (20µA–2mA); maintains output regulation despite varying load current or supply ripple. |
| Low-Freq Noise | 30µVP-P (0.1Hz–10Hz); supports high-resolution 12-bit+ converter accuracy without added filtering. |
| Hysteresis | 160ppm after –40°C/+85°C cycling; limits long-term calibration drift in field-deployed instruments. |
| Reverse Breakdown Change | ≤3.0mV (20µA–2mA); ensures stable reference voltage even with moderate current variation. |
Pinout & Package
LT1634BIS8-4.096#TRPBF is housed in an 8-lead plastic SOIC (S8) package, 0.150-inch narrow body, with thermal resistance θJA = 190°C/W. Pin 1 is marked via bevel edge or dimple; pins 1–4 and 5–8 are on opposing sides. Pins 1, 2, 3, and 6 are DNC (internally connected, no external connection). Pin 4 is GND. Pin 5 is NC (not connected internally). Pin 7 is VOUT. Pin 8 is TEST (may be left open or tied to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | DNC | Internally connected; must remain unconnected per datasheet - no external circuitry allowed. |
| Pin 2 | DNC | Internally connected; floating connection prohibited - violates absolute maximum ratings if loaded. |
| Pin 3 | DNC | Internally connected; no routing or probing permitted to avoid parametric shift or damage. |
| Pin 4 | GND | Reference ground return path; must be low-impedance and star-connected to minimize noise coupling. |
| Pin 5 | NC | No internal connection; electrically isolated - may be left unconnected or grounded for mechanical stability. |
| Pin 6 | DNC | Internally connected; same constraints as Pins 1–3 - no external bias or signal injection. |
| Pin 7 | VOUT | Shunt reference output node; connects to cathode of reference; supplies precise 4.096V when biased with ≥15µA. |
| Pin 8 | TEST | Factory test terminal; functionally redundant; may be left open or tied to Pin 4 (GND) with short trace. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 15µA minimum operating current enables multi-year battery life in portable calibrators and handheld DMMs. |
| Industrial temperature grade | Specified from –40°C to +85°C with guaranteed 25ppm/°C drift - suitable for outdoor instrumentation and factory-floor sensors. |
| Low dynamic impedance | ≤1.5Ω up to 2mA load current ensures minimal output deviation during ADC sampling transients. |
| No output capacitor required | Stable with capacitive loads (e.g., 0.1µF) - simplifies layout and eliminates startup delay or oscillation risk. |
| Low 0.1Hz–10Hz noise | 30µVP-P noise floor preserves effective resolution in precision weigh scales and strain-gauge bridges. |
Applications
| Portable Meters | Precision Regulators |
|---|---|
Use Scenario: Handheld digital multimeters (DMMs) and portable calibrators requiring stable, battery-operated voltage references. IC Role / Device Role / Timing Role: Shunt reference providing 4.096V基准 for 12-bit SAR ADC front-end and display driver logic. Use Value: 0.05% initial accuracy and 25ppm/°C drift ensure calibrated readings remain within spec across environmental shifts and multi-year use. | Use Scenario: Low-noise linear regulators supplying analog sections of mixed-signal SoCs or FPGA power domains. IC Role / Device Role / Timing Role: Precision voltage setpoint for adjustable LDO feedback networks, replacing resistive dividers. Use Value: Eliminates resistor tolerance and TCR errors; 30µVP-P noise prevents supply-induced quantization dither in sensitive analog blocks. |
| A/D and D/A Converters | Calibrators |
Use Scenario: Reference source for 12-bit successive-approximation ADCs (e.g., LTC1286) and dual DACs (e.g., LTC1448). IC Role / Device Role / Timing Role: Primary voltage reference for converter full-scale definition and gain calibration. Use Value: 4.096V output matches common 12-bit full-scale codes (212 = 4096), enabling integer-ratio scaling without software correction. | Use Scenario: Benchtop and field-deployable instrument calibrators verifying sensor transmitter outputs and loop-powered devices. IC Role / Device Role / Timing Role: Stable, low-drift reference for programmable current/voltage output stages and self-test circuits. Use Value: 160ppm hysteresis and <1.5Ω dynamic impedance ensure repeatability across thermal cycles and repeated calibration sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1634AIS8-4.096#TRPBF | Same 4.096V output, but tighter 10ppm/°C max tempco and 0.05% accuracy over –40°C to +85°C - higher grade A version. | Used where lower drift is mandatory (e.g., metrology-grade equipment), but costs more and has identical pinout and footprint. | Select when system-level drift budget demands ≤10ppm/°C; otherwise LT1634BIS8-4.096#TRPBF offers optimal cost/performance for industrial DAQ. |
| REF5040AIDR | TI REF5040A is a 4.096V series reference (not shunt); requires minimum 100µA supply current and has 3ppm/°C drift, but needs external bypass cap. | Applicable where supply headroom permits series topology and ultra-low drift is critical; incompatible pinout and biasing scheme. | Choose only if redesign allows series reference topology and >100µA quiescent current is acceptable; not drop-in compatible. |
Compared with LT1634AIS8-4.096#TRPBF, the LT1634BIS8-4.096#TRPBF trades 15ppm/°C higher drift for lower cost and identical industrial temperature support; versus REF5040AIDR, it offers shunt flexibility and 15µA operation but lacks sub-10ppm/°C stability - making it ideal for cost-sensitive, battery-constrained 12-bit systems.
Availability
LT1634BIS8-4.096#TRPBF is available at Aetrix Electronics and suitable for portable meters, precision regulators, and A/D and D/A converters requiring stable component supply, consistent lead-time visibility, and long-term industrial-grade availability.
Supply support for LT1634BIS8-4.096#TRPBF 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 acquired Linear Technology in 2017 and maintains its precision analog product lines, including voltage references, op amps, and data converters, with global manufacturing and quality certification.
The LT1634 family was designed specifically for micropower, high-accuracy shunt reference applications in portable instrumentation, industrial sensors, and precision data acquisition - emphasizing low drift, low noise, and robustness across temperature extremes.
FAQ
What is the operating temperature range for LT1634BIS8-4.096#TRPBF?
The LT1634BIS8-4.096#TRPBF is specified for industrial temperature operation from –40°C to +85°C. This range is confirmed in the "Order Information" table and electrical characteristics sections of the datasheet, where parameters like temperature coefficient and reverse breakdown voltage are tested and guaranteed across this span. The 'I' suffix in the part number explicitly denotes the industrial grade.
Does LT1634BIS8-4.096#TRPBF require an output capacitor?
No, the LT1634BIS8-4.096#TRPBF does not require an output compensation capacitor and is stable with capacitive loads up to at least 0.1µF, as verified in typical performance graphs (e.g., G07/G08 for 4.096V version). Unlike many shunt references, its internal design eliminates need for external stabilization - simplifying layout and reducing BOM count.
What is the minimum cathode current needed for LT1634BIS8-4.096#TRPBF to regulate properly?
The LT1634BIS8-4.096#TRPBF requires a minimum operating (cathode) current of 15µA to maintain regulation within specifications. This value is explicitly stated in the "4.096V Electrical Characteristics" table under "Minimum Operating Current" and applies across the full –40°C to +85°C temperature range.
How does the noise performance of LT1634BIS8-4.096#TRPBF impact 12-bit ADC accuracy?
The LT1634BIS8-4.096#TRPBF delivers 30µVP-P low-frequency noise (0.1Hz–10Hz), which corresponds to ~7.3 LSBs of a 4.096V full-scale 12-bit system (LSB = 1mV). This noise level is well within typical 12-bit converter requirements and avoids degrading ENOB when paired with proper PCB layout and decoupling - enabling direct use without additional filtering.
Can LT1634BIS8-4.096#TRPBF replace older references like LM385 or LT1034?
Yes, the LT1634BIS8-4.096#TRPBF is positioned as a high-performance upgrade to LM385 and LT1034, offering lower operating current (15µA vs. 20µA+), tighter initial accuracy (±0.05% vs. ±0.2–1%), and guaranteed 25ppm/°C drift (vs. unguaranteed or higher drift in legacy parts). However, pinout differs - it is not a drop-in replacement and requires schematic/layout review.
LT1634BIS8-4.096#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 30 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 30µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 15 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1634BIS8-4.096#TRPBF FAQ
1.How can I place an order for LT1634BIS8-4.096#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1634BIS8-4.096#TRPBF 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 LT1634BIS8-4.096#TRPBF reliable?
The price and inventory of LT1634BIS8-4.096#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1634BIS8-4.096#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1634BIS8-4.096#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1634BIS8-4.096#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1634BIS8-4.096#TRPBF?
LT1634BIS8-4.096#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1634BIS8-4.096#TRPBF 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 LT1634BIS8-4.096#TRPBF?
For technical support, including LT1634BIS8-4.096#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1634BIS8-4.096#TRPBF requirements.
6.How does Aetrix verify that LT1634BIS8-4.096#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1634BIS8-4.096#TRPBF 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 LT1634BIS8-4.096#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1634BIS8-4.096#TRPBF?
All LT1634BIS8-4.096#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1634BIS8-4.096#TRPBF, 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 LT1634BIS8-4.096#TRPBF part is unused and in its original packaging.
Return procedure for LT1634BIS8-4.096#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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