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Analog Devices Inc. LTC2631CTS8-HM12#TRMPBF
- Part No.:
- LTC2631CTS8-HM12#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2631CTS8-HM12#TRMPBF.pdf
- Description:
- IC DAC 12BIT V-OUT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
LTC2631CTS8-HM12#TRMPBF from Analog Devices is a 12-bit, rail-to-rail voltage-output DAC with integrated 4.096V ±10ppm/°C reference, I²C interface (up to 400kHz), and power-on reset to mid-scale. It operates from 4.5V to 5.5V, delivers ±1LSB integral nonlinearity, and features guaranteed monotonicity over –40°C to 125°C. Used in precision analog control loops for industrial sensor calibration and optical module biasing.
For engineers reviewing the LTC2631CTS8-HM12#TRMPBF datasheet, LTC2631CTS8-HM12#TRMPBF pinout, LTC2631CTS8-HM12#TRMPBF application, or LTC2631CTS8-HM12#TRMPBF equivalent, key selection criteria include internal 4.096V reference accuracy, H-grade automotive temperature range, mid-scale power-on reset behavior, TSOT-23-8 package footprint, and I²C address configuration via CA0/REF_SEL pins.
Technical Context
The LTC2631CTS8-HM12#TRMPBF implements a resistor-divider-based DAC architecture with double-buffered input registers and an integrated bandgap reference. Its REF_SEL pin configures default reference mode at power-up-tied to VCC for internal 4.096V reference or GND for external reference operation.
It supports standard- and fast-mode I²C communication (100kHz/400kHz), uses CA0 for slave address selection (three options), and incorporates a power-on reset circuit that forces output to mid-scale (2048/4095) when configured as HM12. Output settling time is 4.6µs to ±1LSB under 5V supply conditions with 2kΩ//100pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output levels with ±1LSB INL guarantee |
| Full-Scale Output | 4.096V - precise internal reference enables direct compatibility with 12-bit ADC full-scale ranges |
| Reference Tempco | ±10ppm/°C - ensures <±0.5mV drift over –40°C to 125°C for stable closed-loop control |
| I²C Speed | 400kHz - supports high-throughput digital control in real-time systems without bus contention |
| Supply Range | 4.5V to 5.5V - matches standard 5V industrial and automotive power rails |
| Temp Grade | H-grade (–40°C to 125°C) - qualified for under-hood automotive and harsh-environment industrial use |
| Power-On Reset | Mid-scale (2048) - prevents transient output spikes during system startup in bias-critical applications |
Pinout & Package
Package: 8-lead TSOT-23 (ThinSOT™), 3mm × 1.7mm footprint, 0.65mm pitch, thermal pad optional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CA0 (Pin 1) | I²C Address Select Bit 0 | Configures one of three I²C slave addresses (0x48, 0x49, or 0x4A) when tied to VCC/GND/floating |
| SCL (Pin 2) | I²C Serial Clock Input | Accepts 0–400kHz clock; requires external pull-up to VCC; rise/fall times ≤300ns with ≤400pF bus capacitance |
| SDA (Pin 3) | I²C Bidirectional Data Line | Open-drain output during ACK; requires external pull-up; supports standard/fast-mode protocols |
| GND (Pin 4) | Analog/Digital Ground Reference | Common return for VOUT, REF, and digital logic; must be low-impedance connection to system ground plane |
| VCC (Pin 5) | Positive Supply Input | 4.5V–5.5V only; bypass with 0.1µF ceramic capacitor placed near pin to suppress supply noise |
| REF (Pin 6) | Reference Voltage Terminal | Outputs 4.096V internal reference (H-grade); accepts external reference input (0–VCC); bypass with 0.33µF recommended |
| VOUT (Pin 7) | Analog Voltage Output | Rail-to-rail buffered output; drives ≥2kΩ load; short-circuit protected (±48mA); 1V/µs slew rate |
| REF_SEL (Pin 8) | Power-On Reference Mode Select | Tied to VCC for internal reference boot; tied to GND for external reference boot; ignored after power-up |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4.096V Reference | Eliminates external reference IC and trimming, reducing BOM count and layout area in 12-bit precision systems |
| Guaranteed Monotonicity | Ensures no code-dependent output reversal across full temperature range - critical for closed-loop stability |
| Low Power-Down Current | 1.8µA max (H-grade) enables energy-efficient sleep modes in battery-backed or always-on instrumentation |
| Double-Buffered Registers | Prevents partial updates during multi-byte writes - ensures glitch-free output transitions in synchronized control systems |
| TSOT-23-8 Package | Enables high-density PCB layouts in space-constrained modules such as optical transceivers and portable test equipment |
Applications
| Industrial Sensor Calibration | Automotive Cabin Climate Control |
|---|---|
Use Scenario: Calibrating thermistor and RTD front-end circuits in programmable logic controllers and distributed I/O modules. IC Role / Device Role / Timing Role: Precision DC bias generator setting reference voltages for analog signal conditioning paths. Use Value: ±1LSB INL and ±10ppm/°C reference ensure calibration accuracy remains within 0.025% FSR over full industrial temperature range. | Use Scenario: Controlling PWM-driven heater elements and fan speed in HVAC actuators for passenger compartment thermal management. IC Role / Device Role / Timing Role: Low-latency analog setpoint generator interfacing with microcontroller via I²C for real-time feedback adjustment. Use Value: 4.6µs settling time and H-grade rating enable responsive, drift-free actuator control in automotive under-dash environments. |
| Optical Transceiver Biasing | Portable Medical Instrumentation |
Use Scenario: Setting bias currents for laser diodes and TEC drivers in SFP+/QSFP+ optical modules. IC Role / Device Role / Timing Role: Stable, low-noise analog voltage source for current mirror references and DAC-controlled current sources. Use Value: 670µVP-P (0.1Hz–200kHz) output noise and rail-to-rail capability support sub-mA current resolution in laser bias circuits. | Use Scenario: Generating patient-isolated analog waveforms in handheld ECG and pulse oximetry devices. IC Role / Device Role / Timing Role: Low-power, mid-scale-initialized DAC providing calibrated excitation signals for analog front-end sensor interfaces. Use Value: 1.8µA power-down current and mid-scale POR prevent hazardous output transients during battery insertion or brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-output DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP4725A0T-E/CH | 12-bit, internal 2.048V reference (±50ppm/°C), 2.7–5.5V supply, no H-grade temp range | Limited to commercial/industrial temp; lacks automotive qualification and tight reference tempco | Select when cost sensitivity outweighs tempco and automotive qualification requirements |
| DAC7571IDBVR | 12-bit, internal 2.048V reference (±15ppm/°C), 2.7–5.5V supply, I²C, –40°C to 125°C | Lower reference accuracy and higher supply current (350µA vs 200µA); same package but different pinout | Choose when existing designs require pin-compatible replacement with relaxed reference stability needs |
Compared with MCP4725A0T-E/CH and DAC7571IDBVR, the LTC2631CTS8-HM12#TRMPBF provides superior reference stability (±10ppm/°C), lower power-down current (1.8µA), and guaranteed monotonicity across automotive temperature extremes-making it optimal for safety-critical analog control where long-term calibration integrity is mandatory.
Availability
LTC2631CTS8-HM12#TRMPBF is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive cabin climate control, and optical transceiver biasing requiring stable component supply, automotive-grade reliability, and consistent 12-bit precision performance.
Supply support for LTC2631CTS8-HM12#TRMPBF 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 LTC2631 family delivers single-channel, low-power, precision DACs with integrated references for space-constrained, high-accuracy analog control applications-designed specifically for systems needing guaranteed monotonicity and minimal calibration overhead.
FAQ
What is the full-scale output voltage of the LTC2631CTS8-HM12#TRMPBF?
The LTC2631CTS8-HM12#TRMPBF has a nominal full-scale output voltage of 4.096V when operating in internal reference mode. This value is derived from its integrated precision bandgap reference and is specified with ±0.4% full-scale error over temperature. The device also supports external reference operation, where the full-scale output equals the applied voltage at the REF pin, up to VCC.
Does the LTC2631CTS8-HM12#TRMPBF support I²C fast-mode operation?
Yes, the LTC2631CTS8-HM12#TRMPBF supports I²C fast-mode operation at up to 400kHz clock frequency. Its timing specifications-including tHD(DAT), tSU(DAT), and tr/tf-are fully characterized for this speed under load conditions up to 400pF per bus line. Standard-mode (100kHz) is also supported, ensuring interoperability with legacy controllers.
What is the power-on reset behavior of the LTC2631CTS8-HM12#TRMPBF?
The LTC2631CTS8-HM12#TRMPBF resets to mid-scale (code 2048) upon power-up, as indicated by the "M" suffix in its part number. This behavior is controlled by the REF_SEL pin: when tied to VCC, the device boots with internal reference enabled and output initialized to VFS/2 = 2.048V. No software command is required to achieve this state.
Can the LTC2631CTS8-HM12#TRMPBF drive capacitive loads directly?
Yes, the LTC2631CTS8-HM12#TRMPBF can drive capacitive loads up to 500pF while maintaining specified settling time (4.6µs to ±1LSB) and monotonicity. For larger loads (e.g., >1nF), an external buffer amplifier is recommended. The REF pin supports up to 10µF bypass capacitance, with 0.33µF strongly recommended for optimal noise performance.
What temperature range is guaranteed for the LTC2631CTS8-HM12#TRMPBF?
The LTC2631CTS8-HM12#TRMPBF is rated for operation from –40°C to +125°C (H-grade), with all key specifications-including INL, DNL, reference tempco, and supply current-guaranteed across this full range. This makes it suitable for under-hood automotive, industrial motor control, and outdoor infrastructure applications where ambient temperatures exceed commercial or industrial limits.
LTC2631CTS8-HM12#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 12
- Number of D/A Converters:
- 1
- Settling Time:
- 4.6µs (Typ)
- Output Type:
- Voltage - Buffered
- Differential Output:
- No
- Data Interface:
- I2C
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- INL/DNL (LSB):
- ±1, ±1 (Max)
- Architecture:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2631CTS8-HM12#TRMPBF FAQ
1.How can I place an order for LTC2631CTS8-HM12#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2631CTS8-HM12#TRMPBF 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 LTC2631CTS8-HM12#TRMPBF reliable?
The price and inventory of LTC2631CTS8-HM12#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2631CTS8-HM12#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2631CTS8-HM12#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2631CTS8-HM12#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2631CTS8-HM12#TRMPBF?
LTC2631CTS8-HM12#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2631CTS8-HM12#TRMPBF 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 LTC2631CTS8-HM12#TRMPBF?
For technical support, including LTC2631CTS8-HM12#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2631CTS8-HM12#TRMPBF requirements.
6.How does Aetrix verify that LTC2631CTS8-HM12#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2631CTS8-HM12#TRMPBF 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 LTC2631CTS8-HM12#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2631CTS8-HM12#TRMPBF?
All LTC2631CTS8-HM12#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2631CTS8-HM12#TRMPBF, 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 LTC2631CTS8-HM12#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2631CTS8-HM12#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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