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Analog Devices Inc. LTC2636IDE-LMX8#PBF
- Part No.:
- LTC2636IDE-LMX8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC2636IDE-LMX8#PBF.pdf
- Description:
- IC DAC 8BIT V-OUT 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,852
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Product details
Overview
LTC2636IDE-LMX8#PBF from Analog Devices is an octal 8-bit voltage-output DAC with integrated 10ppm/°C internal reference, rail-to-rail output buffer, and SPI/MICROWIRE-compatible 3-wire serial interface operating up to 50MHz. It delivers 2.5V full-scale output, operates from 2.7V–5.5V supply, and resets to mid-scale in internal reference mode - ideal for precision analog control in industrial sensor conditioning and closed-loop process monitoring.
For engineers reviewing the LTC2636IDE-LMX8#PBF datasheet, LTC2636IDE-LMX8#PBF pinout, LTC2636IDE-LMX8#PBF application, or LTC2636IDE-LMX8#PBF equivalent, key selection criteria include guaranteed monotonicity over –40°C to 125°C, ultralow DAC-to-DAC crosstalk (<2.4nV·s), ±0.5LSB INL, power-down current of 0.5µA (H-grade), and DFN-14 package compatibility with space-constrained embedded systems.
Technical Context
The LTC2636IDE-LMX8#PBF implements eight independent 8-bit DAC channels sharing a single high-accuracy internal reference (1.25V, 10ppm/°C) that sets full-scale output to 2.5V. Its double-buffered architecture supports asynchronous LDAC-triggered simultaneous updates across all channels, while hardware CLR enables level-triggered zero/mid-scale reset.
It uses a 32-bit SPI frame format with command decoding (e.g., write + update, power-down), supports external reference operation (1V to VCC), and incorporates power-on reset logic that forces mid-scale output at startup - eliminating initialization transients in sensitive analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output levels with ±0.5LSB integral nonlinearity. |
| Full-Scale Output | 2.5V (internal reference mode) - enables direct interfacing with 0–2.5V ADC inputs or op-amp feedback networks. |
| Reference Tempco | 10ppm/°C - ensures <±0.3% full-scale drift over –40°C to 125°C, critical for automotive and industrial environments. |
| Settling Time | 3.4µs to ±1LSB - supports update rates >290kSPS for real-time control loop applications. |
| Supply Current | 0.9mA at 3V (typical) - enables low-power operation in battery-backed instrumentation. |
| Crosstalk | <2.4nV·s - prevents coupling-induced errors when multiple DACs drive adjacent analog circuits. |
| Power-Down Current | 0.5µA (H-grade) - extends system standby life without sacrificing fast wake-up capability. |
Pinout & Package
Package: 14-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 15 = GND, must be soldered to PCB ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.7V–5.5V; requires 0.1µF bypass capacitor to GND for noise suppression. |
| VOUT A–H (Pins 2–5, 10–13) | Analog voltage outputs | Eight rail-to-rail buffered outputs; each drives ≥2kΩ load with <0.035 LSB/mA load regulation. |
| CS/LD (Pin 6) | Chip select / load input | Active-low serial interface enable; rising edge latches command and executes register update or power-down. |
| SCK (Pin 7) | Serial clock input | CMOS/TTL-compatible; supports 50MHz max clock rate for high-throughput configuration. |
| SDI (Pin 8) | Serial data input | Accepts 24- or 32-bit frames; data sampled on SCK rising edge per SPI protocol. |
| REF (Pin 9) | Reference I/O | Outputs 1.25V mid-scale reference in internal mode; accepts 1V–VCC external reference for flexible full-scale scaling. |
| GND (Pin 14) | Ground reference | Primary analog/digital return; connects to exposed pad (Pin 15) for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10ppm/°C reference | Eliminates need for external precision reference IC, reducing BOM count and layout area in compact systems. |
| Mid-scale power-on reset (LMX variant) | Ensures known, safe analog output state at startup - avoids transient overdrive in connected amplifiers or actuators. |
| Double-buffered registers | Enables glitch-free simultaneous updates across all 8 DACs using LDAC or software command, essential for coordinated waveform generation. |
| Rail-to-rail output buffer | Delivers full 0–2.5V swing into 2kΩ loads without external op-amps, simplifying analog output stage design. |
| Ultralow DAC crosstalk (<2.4nV·s) | Maintains channel independence in multi-channel calibration systems where adjacent DAC switching must not perturb others. |
Applications
| Process Control Loop Calibration | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Calibrating 4–20mA transmitter outputs in PLC I/O modules using microcontroller-driven DACs. IC Role / Device Role / Timing Role: Octal DAC provides independent bias and gain trim voltages for multiple sensor front-ends within one compact DFN package. Use Value: Mid-scale power-on reset prevents spurious current surges during cold start, meeting SIL-2 functional safety requirements for field device initialization. | Use Scenario: Generating precise reference voltages for oxygen sensor heater control and exhaust gas recirculation (EGR) valve position feedback. IC Role / Device Role / Timing Role: Voltage-output DAC supplies stable 2.5V-referenced bias to analog front-end comparators and op-amps in engine control units. Use Value: 10ppm/°C reference tempco ensures <±0.25% full-scale error over –40°C to 125°C ambient, satisfying AEC-Q100 Grade 0 temperature compliance. |
| Portable Medical Instrumentation | Industrial Optical Network Monitoring |
Use Scenario: Setting programmable thresholds and offsets in handheld blood glucose meter analog signal paths. IC Role / Device Role / Timing Role: Low-power 8-bit DAC configures gain stages and baseline correction in battery-operated biosensor readout ASICs. Use Value: 0.9mA typical supply current at 3V and 0.5µA power-down mode extend single-cell Li-ion battery life beyond 12 months in standby. | Use Scenario: Controlling laser diode bias currents and photodiode transimpedance amplifier references in fiber optic transceivers. IC Role / Device Role / Timing Role: Precision DAC generates stable DC bias points for optical component drivers requiring sub-mV stability. Use Value: ±0.5LSB INL and <2.4nV·s crosstalk prevent inter-channel interference in multi-wavelength DWDM monitoring systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-output DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5668BRUZ-1 | Octal 16-bit DAC with 2.5V internal reference; 1.25LSB INL; no mid-scale POR option - defaults to zero-scale. | Higher resolution but lacks LMX-style mid-scale power-on reset; requires external POR circuitry for safe startup. | Select when 16-bit precision is mandatory and startup behavior can be managed externally. |
| MCP4822-E/P | Dual 12-bit DAC with 2.048V reference; SPI interface; no integrated reference tempco spec; only two channels. | Lower channel count and unqualified reference stability - unsuitable for multi-channel systems requiring matched tempcos. | Select for cost-sensitive dual-channel designs where reference drift is mitigated by calibration. |
Compared with AD5668BRUZ-1 and MCP4822-E/P, the LTC2636IDE-LMX8#PBF uniquely combines octal channel count, guaranteed mid-scale power-on reset, 10ppm/°C reference stability, and DFN-14 footprint - making it optimal for space-constrained, high-reliability industrial and automotive control nodes requiring deterministic analog initialization.
Availability
LTC2636IDE-LMX8#PBF is available at Aetrix Electronics and suitable for industrial automation, automotive ECU calibration, and portable medical instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC2636IDE-LMX8#PBF 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 industrial, automotive, communications, and healthcare markets.
The LTC2636 product line delivers precision, low-power, multi-channel voltage-output DACs optimized for embedded control, sensor calibration, and closed-loop analog systems demanding deterministic startup behavior and long-term stability.
FAQ
What is the full-scale output voltage of the LTC2636IDE-LMX8#PBF?
The LTC2636IDE-LMX8#PBF has a 2.5V full-scale output voltage when operating in internal reference mode, derived from its integrated 1.25V reference (2× gain). This value is fixed and does not require external components. In external reference mode, full-scale equals the applied REF voltage (1V to VCC), but the LMX suffix confirms internal reference configuration for this specific part.
Does the LTC2636IDE-LMX8#PBF support simultaneous updating of all eight DAC outputs?
Yes, the LTC2636IDE-LMX8#PBF supports simultaneous updating via its double-buffered architecture. A falling edge on the LDAC pin (if used) or execution of Command Code 0x02 ("Write to Input Register n, Update All") triggers immediate, glitch-free updates across all eight DAC registers - ensuring synchronized analog output transitions critical for waveform generation and multi-axis control.
What is the power-on reset behavior of the LTC2636IDE-LMX8#PBF?
The LTC2636IDE-LMX8#PBF powers up to mid-scale (1.25V) in internal reference mode, as indicated by the "MX" in its part number. This behavior is hardware-enforced and occurs regardless of SPI activity, providing a known, safe analog output state during system boot - eliminating risk of transient overvoltage to downstream circuitry such as op-amps or actuators.
Can the LTC2636IDE-LMX8#PBF operate from a 3.3V supply?
Yes, the LTC2636IDE-LMX8#PBF operates from 2.7V to 5.5V, fully supporting 3.3V nominal supplies. At VCC = 3.3V, it maintains specified performance including ±0.5LSB INL, 3.4µs settling time, and 0.9mA typical supply current. The internal reference remains stable at 1.25V (±10ppm/°C), ensuring consistent 2.5V full-scale output across the entire supply range.
Is the LTC2636IDE-LMX8#PBF pin-compatible with other variants in the LTC2636 family?
Yes, all DFN-packaged LTC2636 variants - including LTC2636IDE-LMX8#PBF, LTC2636IDE-LMI12#PBF, and LTC2636IDE-HZ10#PBF - share identical 14-lead DFN pinouts and footprints. This allows drop-in replacement across resolution, reference mode, and power-on reset options without PCB redesign, provided supply voltage and temperature grade requirements are met.
LTC2636IDE-LMX8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 8
- Number of D/A Converters:
- 8
- Settling Time:
- 3.4µs (Typ)
- Output Type:
- Voltage - Buffered
- Differential Output:
- No
- Data Interface:
- SPI
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- INL/DNL (LSB):
- ±0.05, ±0.5 (Max)
- Architecture:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 14-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2636IDE-LMX8#PBF FAQ
1.How can I place an order for LTC2636IDE-LMX8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2636IDE-LMX8#PBF 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 LTC2636IDE-LMX8#PBF reliable?
The price and inventory of LTC2636IDE-LMX8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2636IDE-LMX8#PBF is usually 5 days.
3.What payment methods are accepted for LTC2636IDE-LMX8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2636IDE-LMX8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2636IDE-LMX8#PBF?
LTC2636IDE-LMX8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2636IDE-LMX8#PBF 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 LTC2636IDE-LMX8#PBF?
For technical support, including LTC2636IDE-LMX8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2636IDE-LMX8#PBF requirements.
6.How does Aetrix verify that LTC2636IDE-LMX8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2636IDE-LMX8#PBF 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 LTC2636IDE-LMX8#PBF meets industry standards.
7.What is the process for return or replacement of LTC2636IDE-LMX8#PBF?
All LTC2636IDE-LMX8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2636IDE-LMX8#PBF, 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 LTC2636IDE-LMX8#PBF part is unused and in its original packaging.
Return procedure for LTC2636IDE-LMX8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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