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Analog Devices Inc. LTC2635CUD-LMI10#TRPBF
- Part No.:
- LTC2635CUD-LMI10#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC2635CUD-LMI10#TRPBF.pdf
- Description:
- IC DAC 10BIT V-OUT 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,088
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Product details
Overview
LTC2635CUD-LMI10#TRPBF from Analog Devices is a quad 10-bit voltage-output DAC with integrated 2.5V, 10ppm/°C reference, rail-to-rail output buffers, and I²C interface. It operates from 2.7V to 5.5V, delivers ±1 LSB INL, 0.75mVP-P (0.1Hz–200kHz) output noise, and guarantees monotonicity across 0°C to 70°C - used in precision power supply margining and industrial sensor calibration.
For engineers reviewing the LTC2635CUD-LMI10#TRPBF datasheet, LTC2635CUD-LMI10#TRPBF pinout, LTC2635CUD-LMI10#TRPBF application, or LTC2635CUD-LMI10#TRPBF equivalent, key selection criteria include internal reference stability (10ppm/°C), quad-channel crosstalk (<3nV·s), I²C fast-mode support (400kHz), power-on reset to mid-scale, and QFN-16 package compatibility with high-density PCB layouts.
Technical Context
The LTC2635CUD-LMI10#TRPBF implements four independent 10-bit DAC cores sharing a single precision internal reference and a unified I²C controller with double-buffered input registers. Its LDAC pin enables synchronous update of all four outputs, while CA0–CA2 pins configure one of eight I²C addresses without external hardware.
It supports both internal reference mode (2.5V full-scale, 10ppm/°C drift) and external reference mode (1V to VCC), with guaranteed monotonicity and ±1 LSB integral nonlinearity over temperature. Power-on reset defaults to mid-scale output when internal reference is active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output levels with ±1 LSB INL accuracy |
| Reference | Integrated 2.5V, 10ppm/°C - eliminates external reference component and reduces board area |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V systems without level-shifting |
| I²C Speed | Up to 400kHz (fast mode) - enables rapid multi-DAC configuration in real-time control loops |
| Settling Time | 4.1µs to ±1 LSB - supports dynamic waveform generation up to ~240kHz update rate |
| Output Noise | 0.75mVP-P, 0.1Hz–200kHz - suitable for low-noise analog biasing in sensor front-ends |
| Crosstalk | 2.6nV·s (typ) - prevents unintended interference between channels in multi-loop systems |
Pinout & Package
Package: 16-pin 3mm × 3mm QFN (UD), exposed pad (Pin 17) connected to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.7V–5.5V; requires local 0.1µF bypass to GND |
| VOUTA–VOUTD (Pins 2,3,8,9) | Analog voltage outputs | Rail-to-rail buffered outputs; each drives ≥2kΩ load with <0.16Ω DC impedance |
| LDAC (Pin 3) | Asynchronous load DAC | Falling edge triggers simultaneous update of all four DAC outputs from input registers |
| CA0–CA2 (Pins 4,7,9) | I²C address select inputs | Three binary-configurable pins set one of eight slave addresses (0x48–0x4F) |
| SCL/SDA (Pins 5,6) | I²C serial interface | Standard-compliant open-drain bus pins; require external pull-ups to VCC |
| REF (Pin 7) | Reference input/output | Outputs 1.25V (half-scale) in internal mode; accepts 1V–VCC in external mode |
| GND (Pin 10, Exposed Pad 17) | Ground reference | Primary return path; exposed pad must be soldered to PCB ground plane |
| DNC (Pins 6,15) | Do Not Connect | No internal connection; must remain unconnected and unstubbed |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 10ppm/°C reference | Eliminates need for external precision reference IC or resistor divider, reducing BOM count and layout complexity |
| Quad-channel monotonicity | Guaranteed monotonic operation across –40°C to 125°C ensures predictable control loop behavior in safety-critical systems |
| Double-buffered input registers | Enables glitch-free updates: data written to input registers first, then atomically transferred to DAC registers via LDAC |
| Power-on reset to mid-scale | Prevents transient output spikes at startup - critical for driving sensitive analog circuitry like op-amp bias networks |
| Ultralow DAC-to-DAC crosstalk | 2.6nV·s typical coupling minimizes signal corruption in tightly coupled multi-channel applications (e.g., motor phase control) |
Applications
| Power Supply Margining | Industrial Sensor Calibration |
|---|---|
Use Scenario: Adjusting CPU core voltage within ±3% of nominal during production test to validate system stability under voltage stress. IC Role / Device Role / Timing Role: Quad DAC provides independent, synchronized bias voltages to four PMIC feedback nodes via I²C. Use Value: 10-bit resolution enables 2.44mV step size at 2.5V range, meeting JEDEC JESD84-B51 margining granularity requirements. | Use Scenario: Compensating offset/gain drift in 4-channel RTD temperature transmitters deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Each DAC channel applies calibrated correction voltage to individual instrumentation amplifier reference pins. Use Value: 10ppm/°C reference drift ensures calibration remains valid across 0°C–70°C ambient without recalibration cycles. |
| Automotive Body Control | Portable Medical Instrumentation |
Use Scenario: Generating precise LED bias currents for adaptive interior lighting modules with color-mixing algorithms. IC Role / Device Role / Timing Role: Four DAC outputs drive constant-current LED drivers for RGBW channels using external MOSFETs. Use Value: 4.1µs settling time supports PWM dimming frequencies >200kHz, eliminating visible flicker in human vision range. | Use Scenario: Setting programmable gain and offset in handheld ECG front-end amplifiers requiring low-noise analog trimming. IC Role / Device Role / Timing Role: DACs calibrate baseline voltage and differential gain in analog signal chain prior to ADC sampling. Use Value: 0.75mVP-P broadband noise avoids degrading 16-bit ECG SNR performance during battery-powered operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4728-E/UN | 12-bit resolution, no integrated reference, 2.7V–5.5V supply, I²C interface, 14-pin TSSOP | Requires external reference; higher resolution but lacks on-chip 10ppm/°C stability | Select when absolute accuracy is less critical than code density and cost is primary constraint |
| AD5689RBRUZ-RL7 | 16-bit resolution, internal 2.5V reference (5ppm/°C), SPI interface, 16-pin TSSOP | Higher precision and lower drift, but SPI-only interface limits compatibility with I²C-only controllers | Select when sub-LSB accuracy and ultra-low drift outweigh interface flexibility requirements |
Compared with MCP4728-E/UN and AD5689RBRUZ-RL7, the LTC2635CUD-LMI10#TRPBF uniquely balances 10-bit precision, integrated 10ppm/°C reference, I²C compatibility, and ultralow crosstalk - making it optimal for space-constrained, multi-channel analog control where reference stability and interface simplicity are prioritized over maximum resolution.
Availability
LTC2635CUD-LMI10#TRPBF is available at Aetrix Electronics and suitable for power supply margining, industrial sensor calibration, automotive body control, and portable medical instrumentation requiring stable component supply and long-term manufacturing continuity.
Supply support for LTC2635CUD-LMI10#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2635 product line delivers compact, quad-channel voltage-output DACs with integrated references for precision analog control in space- and power-constrained systems - designed specifically for calibration, margining, and closed-loop biasing applications.
FAQ
What is the full-scale output voltage of the LTC2635CUD-LMI10#TRPBF?
The LTC2635CUD-LMI10#TRPBF has a full-scale output voltage of 2.5V when operating in internal reference mode. This is derived from its integrated 1.25V reference (output at REF pin) scaled by the internal DAC architecture to deliver 0V to 2.5V at each VOUT pin. External reference mode supports full-scale outputs from 1V to VCC, but the LTC2635CUD-LMI10#TRPBF is configured for internal 2.5V operation per its part number suffix "L".
Does the LTC2635CUD-LMI10#TRPBF support I²C fast mode?
Yes, the LTC2635CUD-LMI10#TRPBF supports I²C fast mode with a maximum clock frequency of 400kHz. Its timing characteristics - including tSU(DAT) = 100ns, tHD(DAT) ≤ 0.9µs, and tLOW/tHIGH ≥ 1.3µs/0.6µs - comply fully with I²C Specification Version 2.1 fast-mode requirements, enabling high-throughput configuration of all four DAC channels.
What is the power-on reset behavior of the LTC2635CUD-LMI10#TRPBF?
The LTC2635CUD-LMI10#TRPBF performs a power-on reset to mid-scale (512 decimal for 10-bit) when operating in internal reference mode, as indicated by the "MI" in its part number. This ensures all four outputs initialize to 1.25V, preventing disruptive transients on connected analog circuitry such as op-amp bias networks or sensor excitation paths.
Can the LTC2635CUD-LMI10#TRPBF drive capacitive loads?
Yes, the LTC2635CUD-LMI10#TRPBF can drive capacitive loads up to 500pF while maintaining specified settling time (4.1µs) and monotonicity. Its rail-to-rail output buffer is optimized for stability with moderate capacitance; for loads exceeding 500pF, an external unity-gain buffer is recommended to preserve dynamic performance and avoid peaking or oscillation.
What package type does the LTC2635CUD-LMI10#TRPBF use?
The LTC2635CUD-LMI10#TRPBF uses a 16-pin 3mm × 3mm plastic QFN package (UD), with an exposed thermal pad (Pin 17) that must be soldered to the PCB ground plane. This package offers low thermal resistance (θJA = 68°C/W) and high pin density, making it ideal for compact industrial and portable designs where board space is constrained.
LTC2635CUD-LMI10#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 10
- Number of D/A Converters:
- 4
- Settling Time:
- 4.1µs (Typ)
- Output Type:
- Voltage - Buffered
- Differential Output:
- No
- Data Interface:
- I2C
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- INL/DNL (LSB):
- ±0.2, ±0.5 (Max)
- Architecture:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-QFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2635CUD-LMI10#TRPBF FAQ
1.How can I place an order for LTC2635CUD-LMI10#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2635CUD-LMI10#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 LTC2635CUD-LMI10#TRPBF reliable?
The price and inventory of LTC2635CUD-LMI10#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2635CUD-LMI10#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2635CUD-LMI10#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2635CUD-LMI10#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2635CUD-LMI10#TRPBF?
LTC2635CUD-LMI10#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2635CUD-LMI10#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 LTC2635CUD-LMI10#TRPBF?
For technical support, including LTC2635CUD-LMI10#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2635CUD-LMI10#TRPBF requirements.
6.How does Aetrix verify that LTC2635CUD-LMI10#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2635CUD-LMI10#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 LTC2635CUD-LMI10#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2635CUD-LMI10#TRPBF?
All LTC2635CUD-LMI10#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2635CUD-LMI10#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 LTC2635CUD-LMI10#TRPBF part is unused and in its original packaging.
Return procedure for LTC2635CUD-LMI10#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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