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Analog Devices Inc. LTC1273BCN#PBF
- Part No.:
- LTC1273BCN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1273BCN#PBF.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,150
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Product details
Overview
LTC1273BCN#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 300ksps successive-approximation analog-to-digital converter with integrated 2.42V reference, internal synchronized clock, and high-impedance unipolar 0V–5V analog input. It operates from a single +5V supply, dissipates 75mW typical, and delivers ±1/2LSB INL and ±3/4LSB DNL max over 0°C to 70°C - ideal for precision data acquisition in industrial instrumentation.
For engineers reviewing the LTC1273BCN#PBF datasheet, LTC1273BCN#PBF pinout, LTC1273BCN#PBF application, or LTC1273BCN#PBF equivalent, key selection criteria include its 300ksps sampling rate, on-chip 25ppm/°C reference stability, 70dB S/(N+D) at Nyquist, 24-pin PDIP package compatibility, and support for parallel 12-bit or byte-multiplexed readout via HBEN control.
Technical Context
The LTC1273BCN#PBF implements a switched-capacitor SAR architecture with an integrated sample-and-hold (600ns acquisition time), 12-bit capacitive DAC, and high-speed comparator. Its internal clock is factory-trimmed to guarantee ≤2.7µs conversion time and automatically synchronizes to each CS/RD command, eliminating asynchronous clock noise.
Digital interface uses active-low CS and RD with optional HBEN for 8-bit multiplexed bus access. Output drivers are three-state, with BUSY indicating conversion status. The device supports both parallel 12-bit output (D11–D0/8) and ROM-mode timing, enabling direct connection to microprocessors, DSPs, and FIFOs without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonicity and full-scale linearity for precision measurement systems. |
| Sampling Rate | 300ksps maximum - enables real-time capture of signals up to 150kHz Nyquist bandwidth. |
| S/(N + D) | 70dB at 150kHz input - ensures ≥11.3 effective bits for high-fidelity spectral analysis and audio digitization. |
| INL / DNL | ±1/2LSB / ±3/4LSB max (B-grade) - meets stringent DC accuracy requirements in calibration and sensor interfaces. |
| Reference Voltage | 2.420V ±20mV, 25ppm/°C max drift - provides stable scaling without external reference components. |
| Power Dissipation | 75mW typical at 300ksps - enables low-thermal-load designs in dense PCB layouts. |
| Analog Input Range | 0V to 5V unipolar - matches standard industrial sensor outputs and PLC signal levels. |
Pinout & Package
Package: 24-lead plastic DIP (PDIP), 0.300" wide, RoHS-compliant #PBF suffix. Thermal resistance θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AIN | Analog Input | High-impedance unipolar input (0V–5V); accepts source impedances ≤100Ω for optimal AC performance. |
| 2 VREF | Reference Output | 2.42V bandgap reference; requires 10µF + 0.1µF bypass to AGND for low-noise operation. |
| 3 AGND | Analog Ground | Separate ground return for analog circuitry; must be tied to DGND at single point. |
| 4–11 D11–D4 | Data Output (MSB–D4) | Three-state parallel outputs; driven only when CS and RD are low. |
| 12 DGND | Digital Ground | Digital return path; connects to AGND at system star point. |
| 13–16 D3/11–D0/8 | Data Output (D3–D0 or D11–D8) | Multiplexed lower byte; controlled by HBEN for 8-bit bus interface. |
| 17,18 NC | No Connection | Not bonded internally; must remain unconnected. |
| 19 HBEN | High-Byte Enable | When HIGH, disables conversion start and outputs upper 8 bits (D11–D4) on D3/11–D0/8 pins. |
| 20 RD | Read Input | Active-low control: initiates conversion when CS and HBEN are low; enables output drivers. |
| 21 CS | Chip Select | Active-low enable for all digital inputs; required for RD/HBEN recognition. |
| 22 BUSY | Conversion Status | Active-low open-drain output; LOW during conversion, HIGH when data ready. |
| 23 NC | No Connection | Not connected for LTC1273 variant; differs from LTC1275/LTC1276 which use this pin as VSS. |
| 24 VDD | Positive Supply | +4.95V to +5.25V; requires 10µF + 0.1µF bypass to AGND near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronized clock | Eliminates external clock routing and jitter concerns; conversion timing fully deterministic per RD pulse. |
| On-chip 2.42V reference | Reduces BOM count and layout area; ±20mV initial accuracy and 25ppm/°C tempco meet industrial grade specs. |
| High-impedance analog input | Enables direct connection to passive sensors or op-amp buffers without gain-stage redesign. |
| ESD protection on all pins | Withstands >2kV HBM - improves robustness in manufacturing and field-deployed systems. |
| Byte-multiplexed parallel interface | Supports 8-bit microcontrollers via HBEN-controlled data bus sharing, reducing I/O pin count. |
Applications
| Industrial Data Acquisition | Test & Measurement Equipment |
|---|---|
|
Use Scenario: High-channel-count PLC analog input modules acquiring temperature, pressure, and flow sensor signals at 100–300Hz rates. IC Role / Device Role / Timing Role: Primary ADC converting 0–5V sensor outputs into 12-bit digital words for microcontroller processing. Use Value: ±1/2LSB INL ensures <0.012% full-scale error across temperature, critical for traceable calibration. |
Use Scenario: Portable oscilloscope front-end digitizing 0–5V probe signals with real-time FFT analysis. IC Role / Device Role / Timing Role: Sampling ADC providing 300ksps throughput and 70dB S/(N+D) for clean spectral representation. Use Value: On-chip 2.42V reference eliminates external voltage reference drift, maintaining amplitude accuracy over time. |
| Audio Signal Digitization | Motor Control Feedback |
|
Use Scenario: Digital audio recorder capturing line-level signals with anti-alias filtering before 150kHz Nyquist limit. IC Role / Device Role / Timing Role: Unipolar ADC sampling audio waveforms with minimal THD distortion (–74dB at 150kHz). Use Value: 77dB THD enables >12-bit dynamic range for professional-grade audio fidelity. |
Use Scenario: Closed-loop servo drive monitoring motor phase current via shunt resistor and amplifier. IC Role / Device Role / Timing Role: Precision ADC measuring amplified 0–5V current sense voltage for real-time torque calculation. Use Value: 600ns acquisition time allows accurate sampling within tight PWM dead-time windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7V–5.25V supply, SPI interface, 200ksps, no internal reference - requires external 2.5V ref. | Lower power (15mW), but serial interface increases MCU overhead vs parallel LTC1273BCN#PBF. | Choose for ultra-low-power battery systems where SPI bus availability outweighs speed loss. |
| MAX11131AUT+ | Single 2.7V–3.6V supply, 500ksps, internal 2.048V ref, ±1LSB INL - higher speed but narrower input range (0–VREF). | Requires level-shifting for 0–5V inputs; better suited for low-voltage embedded systems than industrial 5V rails. | Choose when operating from 3.3V logic and needing faster sampling, accepting reduced full-scale range. |
Compared with ADS7822U and MAX11131AUT+, the LTC1273BCN#PBF uniquely combines 5V single-supply operation, integrated 2.42V reference, parallel 12-bit interface, and guaranteed ±1/2LSB INL - making it optimal for legacy industrial controllers requiring drop-in compatibility and minimal firmware changes.
Availability
LTC1273BCN#PBF is available at Aetrix Electronics and suitable for industrial instrumentation, test equipment, and motor control systems requiring stable component supply, long-term obsolescence management, and RoHS-compliant through-hole packaging.
Supply support for LTC1273BCN#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1273BCN#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for high-accuracy, medium-speed sampling in space-constrained industrial and instrumentation applications where reliability and long-term supply are critical.
FAQ
What is the operating temperature range for the LTC1273BCN#PBF?
The LTC1273BCN#PBF is rated for commercial operation from 0°C to 70°C. This range is explicitly defined in the Absolute Maximum Ratings table and confirmed across all DC and AC specifications for the B-grade version. The 'B' suffix denotes the tighter ±1/2LSB INL and ±3/4LSB DNL tolerances maintained across this full temperature span.
Does the LTC1273BCN#PBF require an external clock source?
No, the LTC1273BCN#PBF does not require an external clock. It features an internally trimmed, synchronized clock that automatically aligns with each RD command, ensuring deterministic 2.7µs conversion time without external timing components or clock distribution challenges.
Can the LTC1273BCN#PBF interface directly with an 8-bit microcontroller?
Yes, the LTC1273BCN#PBF supports byte-multiplexed readout via the HBEN pin. When HBEN is HIGH, the upper 8 bits (D11–D4) appear on pins D3/11–D0/8, allowing full 12-bit data transfer using only an 8-bit data bus - ideal for legacy 8-bit MCUs without requiring external latches or glue logic.
What is the analog input impedance of the LTC1273BCN#PBF?
The LTC1273BCN#PBF features a high-impedance analog input with leakage current ≤±1µA (CS = HIGH) and input capacitance of 50pF in sample mode. This allows direct interfacing with high-output-impedance sources like thermistors or potentiometers, provided sufficient acquisition time (≥600ns) is allowed between conversions.
How is the reference voltage used in the LTC1273BCN#PBF?
The LTC1273BCN#PBF's internal 2.42V reference is factory-trimmed and connected to the DAC core. It is also available at Pin 2 (VREF) to serve as a stable scaling reference for external circuitry. For optimal performance, it must be bypassed with 10µF tantalum + 0.1µF ceramic to AGND, as specified in the application diagram.
LTC1273BCN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
LTC1273BCN#PBF FAQ
1.How can I place an order for LTC1273BCN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1273BCN#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 LTC1273BCN#PBF reliable?
The price and inventory of LTC1273BCN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1273BCN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1273BCN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1273BCN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1273BCN#PBF?
LTC1273BCN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1273BCN#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 LTC1273BCN#PBF?
For technical support, including LTC1273BCN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1273BCN#PBF requirements.
6.How does Aetrix verify that LTC1273BCN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1273BCN#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 LTC1273BCN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1273BCN#PBF?
All LTC1273BCN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1273BCN#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 LTC1273BCN#PBF part is unused and in its original packaging.
Return procedure for LTC1273BCN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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