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Analog Devices Inc. LTC1453CS8#TRPBF
- Part No.:
- LTC1453CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital to Analog Converters (DAC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1453CS8#TRPBF.pdf
- Description:
- IC DAC 12BIT V-OUT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,698
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Product details
Overview
LTC1453CS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit rail-to-rail voltage-output DAC with integrated 1.22V reference, operating from 2.7V to 5.5V single supply, delivering 2.5V full-scale output and consuming only 250µA typical supply current. It serves as a precision digital-to-analog interface in low-power industrial control loops and isolated current sources.
For engineers reviewing the LTC1453CS8#TRPBF datasheet, LTC1453CS8#TRPBF pinout, LTC1453CS8#TRPBF application, or LTC1453CS8#TRPBF equivalent, key selection criteria include its buffered rail-to-rail output swing, daisy-chainable 3-wire serial interface, internal reference accuracy (±0.025V), guaranteed monotonicity, and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC1453CS8#TRPBF implements a 12-bit segmented resistor ladder DAC core with an integrated rail-to-rail output buffer amplifier and on-chip 1.22V bandgap reference. Its serial interface uses TTL-compatible DIN, CLK, and CS/LD signals with Schmitt-triggered clock input for direct optocoupler interfacing.
It supports cascaded daisy-chain operation via DOUT-to-DIN connection across multiple devices, enabling synchronized updates of multi-channel analog outputs using shared clock and load signals. Power-on reset ensures known output state at startup, and the REF pin allows external reference override when driven above 1.22V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output levels over full-scale range |
| Full-Scale Output | 2.500V ±30mV - enables precise 0–2.5V analog control without external gain stages |
| Differential Nonlinearity | ±0.5LSB - guarantees monotonic transfer function critical for closed-loop stability |
| Supply Current | 250µA typical at 3V - supports battery-powered and energy-sensitive applications |
| Reference Voltage | 1.220V ±25mV - internally generated, stable over temperature (±0.08 LSB/°C) |
| Output Settling Time | 14µs to ±0.5LSB - meets timing requirements for moderate-speed control updates |
| Operating Supply Range | 2.7V to 5.5V - compatible with both 3V and 5V system rails without level-shifting |
Pinout & Package
Package: 8-lead plastic SO (SO-8, narrow 0.150"), JEDEC MS-012AC, 3.9mm × 4.9mm footprint, RoHS-compliant, tape-and-reel (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CLK) | Serial clock input | TTL-compatible input with Schmitt trigger; enables direct optocoupler drive and noise immunity |
| 2 (DIN) | Serial data input | MSB-first 12-bit data stream latched on rising CLK edge; supports daisy-chain input |
| 3 (CS/LD) | Chip select / load control | Active-low enable for serial clocking; rising edge transfers shift register to DAC register |
| 4 (DOUT) | Serial data output | Buffered shift register output; used to cascade data to next device in daisy chain |
| 5 (GND) | Analog/digital ground | Single ground pin shared by analog and digital sections; requires low-impedance PCB return path |
| 6 (REF) | Reference input/output | Provides 1.22V internal reference; externally overdriven to disable internal ref and accept external source |
| 7 (VOUT) | Buffered DAC output | Rail-to-rail voltage output capable of sourcing/sinking 5mA; settles within 14µs to ±0.5LSB |
| 8 (VCC) | Positive supply | 2.7V–5.5V single supply; requires local 0.1µF bypass capacitor to GND for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.22V reference | Eliminates external reference component and associated layout sensitivity; ±25mV initial accuracy |
| Rail-to-rail buffered output | Drives loads to within millivolts of VCC or GND when unloaded; maintains linearity down to 300mV from rails under 5mA load |
| Daisy-chainable 3-wire interface | Enables multi-DAC synchronization with one microcontroller port; no additional GPIO or timing overhead |
| Schmitt-triggered CLK input | Accepts slow-rising or noisy clock edges (e.g., from optocouplers); removes need for external signal conditioning |
| Power-on reset | Ensures DAC output defaults to zero-scale (0V) at power-up, preventing uncontrolled actuator movement |
Applications
| Industrial Process Controller | Optically Isolated 4–20mA Loop |
|---|---|
|
Use Scenario: Digitally controlled analog output in PLC I/O modules requiring stable 0–2.5V setpoint generation for valve positioners or sensor calibration. IC Role / Device Role / Timing Role: Primary voltage-output DAC providing high-accuracy, low-drift analog command signal synchronized to controller update rate. Use Value: 12-bit resolution and ±0.5LSB DNL ensure sub-0.025% control fidelity; 250µA supply current extends module battery life in remote deployments. |
Use Scenario: Isolated current transmitter where microcontroller resides on primary side and loop power (3.3–30V) powers secondary-side DAC and op-amp circuitry. IC Role / Device Role / Timing Role: Reference source (1.22V) and analog output driver (VOUT) jointly generate 4mA offset + 0–16mA digitally scaled current. Use Value: Internal 1.22V reference eliminates need for isolated reference supply; rail-to-rail output ensures full compliance with low-voltage loop headroom (≥3.3V). |
| Digitally Programmable Current Source | Bipolar Output Signal Generator |
|
Use Scenario: Adjustable current sink/source for sensor biasing, LED dimming, or transducer excitation in portable test equipment. IC Role / Device Role / Timing Role: Precision voltage source feeding external op-amp and transistor stage to convert 0–2.5V into 0–10mA proportional current. Use Value: 2.5V full-scale output directly maps to 10mA with 410Ω sense resistor; SO-8 footprint minimizes board area in handheld form factors. |
Use Scenario: Wide-swing bipolar waveform generation (±4V) in automated test equipment requiring programmable DC offsets and amplitude scaling. IC Role / Device Role / Timing Role: Unipolar DAC front-end whose output is conditioned by external op-amp network to produce symmetrical bipolar output. Use Value: Onboard 1.22V reference supplies stable offset voltage; rail-to-rail output ensures maximum dynamic range before external amplification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit voltage-output DAC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1655CS8#TRPBF | 16-bit resolution, same SO-8 pinout, 2.5V full-scale, 3V/5V operation, higher ICC (450µA typ) | Higher precision required; trade-off is increased power and cost; not drop-in due to different resolution and timing | Select when 16-bit resolution outweighs 2× power increase and software bit-depth changes |
| LTC1448CS8#TRPBF | Dual 12-bit DAC in same SO-8 package; 2.5V full-scale; VOUT swings to VREF (not rail-to-rail); ICC = 350µA typ | Requires two independent DAC channels; output limited to 0–1.22V unless external gain applied | Choose for dual-channel needs where rail-to-rail is not mandatory and reference-limited swing suffices |
Compared with LTC1453CS8#TRPBF, LTC1655CS8#TRPBF offers 4× finer resolution but doubles supply current and alters firmware handling, while LTC1448CS8#TRPBF provides channel density at the expense of output range flexibility and slightly higher power-neither is pin-compatible nor functionally identical.
Availability
LTC1453CS8#TRPBF is available at Aetrix Electronics and suitable for industrial process controllers, optically isolated 4–20mA transmitters, and digitally programmable current sources requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1453CS8#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 full technical and manufacturing continuity for legacy Linear ICs including the LTC1453 family.
The LTC1453CS8#TRPBF belongs to Linear's micropower precision DAC product line, designed specifically for low-voltage, low-power industrial and instrumentation applications demanding rail-to-rail output and integrated reference functionality.
FAQ
What is the full-scale output voltage of the LTC1453CS8#TRPBF?
The LTC1453CS8#TRPBF delivers a nominal full-scale output voltage of 2.500V when loaded with the all-ones code (0xFFF), based on its internal 1.22V reference and fixed 2.05× gain architecture. The datasheet specifies this as 2.470V to 2.530V over temperature and supply variations, ensuring predictable analog range without external components.
Does the LTC1453CS8#TRPBF require external components to operate?
No, the LTC1453CS8#TRPBF operates autonomously with only a 0.1µF bypass capacitor on VCC to GND. Its integrated 1.22V reference, rail-to-rail output buffer, and 3-wire serial interface eliminate the need for external references, op-amps, or level shifters-enabling a complete 12-bit DAC solution in a single SO-8 package.
Can multiple LTC1453CS8#TRPBF devices be connected in series?
Yes, the LTC1453CS8#TRPBF supports daisy-chained configuration via its DOUT pin, which buffers the shift register output. Connecting DOUT of one device to DIN of the next-while sharing CLK and CS/LD-allows synchronous loading of multiple DACs with a single serial data stream and one load pulse.
What is the minimum supply voltage for reliable operation of the LTC1453CS8#TRPBF?
The LTC1453CS8#TRPBF operates reliably down to 2.7V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. At 2.7V, it maintains full 12-bit performance including monotonicity, 2.5V full-scale output, and 14µs settling time-making it suitable for 3V battery-powered systems with brown-out margins.
How does the internal reference of the LTC1453CS8#TRPBF behave when an external reference is applied?
When an external voltage exceeding 1.22V is applied to the REF pin of the LTC1453CS8#TRPBF, the internal reference is automatically disabled. This allows seamless integration of higher-precision or temperature-stable external references while retaining the same pinout and interface behavior-no additional control signals or configuration are needed.
LTC1453CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Number of Bits:
- 12
- Number of D/A Converters:
- 1
- Settling Time:
- 14µs (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):
- ±4 (Max), ±0.5 (Max)
- Architecture:
- R-2R
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1453CS8#TRPBF FAQ
1.How can I place an order for LTC1453CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1453CS8#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 LTC1453CS8#TRPBF reliable?
The price and inventory of LTC1453CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1453CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1453CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1453CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1453CS8#TRPBF?
LTC1453CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1453CS8#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 LTC1453CS8#TRPBF?
For technical support, including LTC1453CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1453CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1453CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1453CS8#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 LTC1453CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1453CS8#TRPBF?
All LTC1453CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1453CS8#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 LTC1453CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1453CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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