My Inquiry
My Account
Analog Devices Inc. LTC1282ACSW#PBF
- Part No.:
- LTC1282ACSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1282ACSW#PBF.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1282ACSW#PBF from Analog Devices is a 12-bit, 140ksps sampling analog-to-digital converter with integrated 1.20V reference, internal synchronized clock, and 24-pin SO Wide package. It operates from single 3V or dual ±3V supplies, delivers ±0.5LSB INL and ±0.75LSB DNL, and supports unipolar (0V–2.5V) and bipolar (±1.25V) input ranges for high-speed data acquisition in DSP and telecom systems.
For engineers reviewing the LTC1282ACSW#PBF datasheet, LTC1282ACSW#PBF pinout, LTC1282ACSW#PBF application, or LTC1282ACSW#PBF equivalent, key selection criteria include guaranteed 6µs conversion time, on-chip 25ppm/°C reference drift, 69dB S/(N+D) at Nyquist, ESD protection on all pins, and compatibility with FIFOs, microprocessors, and DSPs via parallel interface.
Technical Context
The LTC1282ACSW#PBF uses successive approximation register (SAR) architecture with an integrated 12-bit capacitive DAC and sample-and-hold circuit. Its internal clock is factory-trimmed to ensure ≤6µs conversion time and automatically synchronizes to each RD command, eliminating asynchronous clock noise.
It supports two operating modes: unipolar (VSS tied to DGND, 0V–2.5V input) and bipolar (VSS = –3V, ±1.25V input with two's complement output). The 1.20V internal reference provides ≤25ppm/°C full-scale drift and supplies up to 0.3mA, while the high-impedance analog input draws only ±1µA leakage current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer function for precision measurement. |
| Sampling Rate | 140ksps maximum - enables real-time capture of signals up to 70kHz Nyquist frequency. |
| INL / DNL | ±0.5LSB / ±0.75LSB max - ensures accurate code transitions and linearity critical for spectrum analysis. |
| S/(N + D) | 69dB at 70kHz - supports >11 ENOBs for high-fidelity audio and telecom signal digitization. |
| Reference Voltage | 1.200V ±10mV (25ppm/°C drift) - stable internal reference eliminates need for external precision voltage source. |
| Power Dissipation | 12mW typical at 140ksps - low power enables use in battery-powered or thermally constrained embedded systems. |
| Analog Input Range | 0V to 2.5V (unipolar) or ±1.25V (bipolar) - flexible input scaling for sensor interfaces and AC-coupled signal chains. |
Pinout & Package
Package: 24-lead plastic SO wide (SW), 0°C to 70°C operating temperature range, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN (1) | Analog input | Accepts 0V–2.5V (unipolar) or ±1.25V (bipolar); high-impedance, ±1µA leakage, 63pF capacitance in sample mode. |
| VREF (2) | Reference output | 1.20V ±10mV bandgap reference; supplies up to 0.3mA; requires 10µF + 0.1µF bypass to AGND. |
| AGND (3) | Analog ground | Separate ground return for analog section; must be connected to DGND at single point for noise isolation. |
| D11–D4 (4–11) | Data outputs (MSB–D4) | Three-state parallel outputs; D11 is MSB; active when CS and RD are low. |
| DGND (12) | Digital ground | Digital return path; tied to AGND externally to minimize ground bounce and digital noise coupling. |
| D3/11–D0/8 (13–16) | Multiplexed data outputs | Output lower 4 bits (D3–D0) or upper 4 bits (D11–D8) depending on HBEN state; enables 8-bit bus interface. |
| NC (17, 18) | No connection | Not internally bonded; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| HBEN (19) | High-byte enable | When HIGH, disables conversion start and outputs upper 4 bits (D11–D8) on D3/11–D0/8 pins. |
| RD (20) | Read control | Active-low signal that initiates conversion when CS and HBEN are low; also enables output drivers. |
| CS (21) | Chip select | Active-low enable; ADC ignores RD and HBEN unless CS is asserted. |
| BUSY (22) | Status indicator | Active-low open-drain output signaling conversion in progress; used for handshaking with microprocessor. |
| VSS (23) | Negative supply | –3V for bipolar operation; tied to DGND for unipolar mode; bypassed with 0.1µF ceramic to AGND. |
| VDD (24) | Positive supply | 3V supply (2.7V–3.6V range); bypassed with 10µF tantalum + 0.1µF ceramic to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronized clock | Factory-trimmed 6µs max conversion time eliminates external clock routing and jitter sensitivity. |
| On-chip 1.20V reference | 25ppm/°C drift and 0.55 LSB/V line regulation enable stable full-scale accuracy without external reference IC. |
| Unipolar/bipolar mode support | Single-part flexibility across sensor (0–2.5V) and AC signal (±1.25V) applications without redesigning analog front-end. |
| ESD protection on all pins | Withstands >60mA transient currents below VSS or above VDD without latchup - improves board-level robustness in industrial environments. |
| High-impedance analog input | 63pF input capacitance and ±1µA leakage allow direct connection to high-Z sources like piezoelectric sensors or op-amp buffers. |
Applications
| Audio Signal Digitization | DSP-Based Spectrum Analysis |
|---|---|
Use Scenario: Capturing microphone or line-level audio signals in portable voice recorders or VoIP gateways. IC Role / Device Role / Timing Role: 12-bit SAR ADC providing 140ksps sampling with 69dB S/(N+D) to preserve dynamic range and harmonic fidelity. Use Value: Enables real-time FFT processing with >11 ENOBs at 70kHz, supporting wideband audio codecs and noise cancellation algorithms. | Use Scenario: Real-time spectral monitoring in RF test equipment or vibration analysis systems. IC Role / Device Role / Timing Role: High-speed data acquisition front-end converting analog sensor outputs into digital streams for FPGA or DSP FFT engines. Use Value: 77dB THD at Nyquist and 200kHz full linear bandwidth ensure accurate amplitude and phase representation of multi-tone inputs. |
| Multiplexed Sensor Data Acquisition | Telecom Channel Monitoring |
Use Scenario: Scanning multiple industrial temperature, pressure, or strain sensors using analog multiplexer switching. IC Role / Device Role / Timing Role: Sampling A/D converter with 1.14µs acquisition time and fast 6µs conversion enabling <11.4µs per channel at 10-channel scan rate. Use Value: Internal reference and unipolar/bipolar flexibility simplify calibration across diverse sensor output ranges without external gain/offset circuitry. | Use Scenario: Monitoring analog voice channels in PBX or base station line cards before digital encoding. IC Role / Device Role / Timing Role: Precision ADC interfacing directly to line interface units (LIUs) with ±1.25V bipolar input compliance. Use Value: Two's complement output format and 25ppm/°C reference drift meet GR-909 and ITU-T G.711 requirements for voiceband signal integrity. |
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 |
|---|---|---|---|
| AD7892BRZ-1 | 12-bit, 100ksps, external reference required, 28-lead SOIC package | Lacks integrated reference and internal clock; requires external timing and reference design effort | Select when system already uses shared precision reference and clock distribution; not drop-in for LTC1282ACSW#PBF. |
| MAX1166BCAP+ | 12-bit, 133ksps, internal reference (2.048V), 20-lead TSSOP package | Different reference voltage (2.048V vs 1.20V), smaller package, no bipolar mode support | Choose for space-constrained designs needing 2.048V reference compatibility; unipolar-only operation limits AC signal use cases. |
Compared with AD7892BRZ-1 and MAX1166BCAP+, the LTC1282ACSW#PBF offers unique integration of 1.20V reference, bipolar input capability, and guaranteed 6µs conversion time - reducing BOM count and layout complexity in mixed-signal data acquisition systems.
Availability
LTC1282ACSW#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, digital signal processing, and telecom channel monitoring requiring stable component supply and long-term production continuity.
Supply support for LTC1282ACSW#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1282ACSW#PBF belongs to the Linear Technology (now part of Analog Devices) precision data acquisition product line, designed for applications demanding low-power, high-speed, and self-contained ADC functionality without external support components.
FAQ
What is the maximum sampling rate supported by the LTC1282ACSW#PBF?
The LTC1282ACSW#PBF supports a maximum sampling rate of 140ksps under commercial temperature conditions (0°C to 70°C). This rate is guaranteed by the internal synchronized clock and enables full 12-bit resolution at Nyquist frequencies up to 70kHz. At military temperature range, the maximum rate reduces to 120ksps per datasheet specifications.
Does the LTC1282ACSW#PBF require an external clock source?
No, the LTC1282ACSW#PBF does not require an external clock source. It features an internally trimmed clock that automatically synchronizes to each RD command, ensuring deterministic 6µs conversion time and eliminating clock routing, jitter, and synchronization issues common in external-clock ADCs.
Can the LTC1282ACSW#PBF operate in both unipolar and bipolar modes simultaneously?
No, the LTC1282ACSW#PBF operates in either unipolar or bipolar mode based on the VSS connection: VSS tied to DGND enables 0V–2.5V unipolar input; VSS at –3V enables ±1.25V bipolar input with two's complement output. Mode selection is hardware-configured and fixed per power-up configuration - not dynamically switchable during operation.
What is the purpose of the HBEN pin on the LTC1282ACSW#PBF?
The HBEN (High Byte Enable) pin on the LTC1282ACSW#PBF controls data bus multiplexing: when LOW, all 12 bits appear on D11–D4 and D3/11–D0/8; when HIGH, only upper 4 bits (D11–D8) are output on D3/11–D0/8, enabling 8-bit microprocessor interface. HBEN HIGH also disables conversion start, providing hardware flow control.
How is the internal reference of the LTC1282ACSW#PBF decoupled for optimal performance?
The internal 1.20V reference (VREF pin) of the LTC1282ACSW#PBF must be decoupled with a 10µF tantalum capacitor in parallel with a 0.1µF ceramic capacitor to AGND. This dual-capacitor network suppresses low-frequency drift and high-frequency noise, maintaining ≤25ppm/°C full-scale drift and minimizing code transition noise in precision measurement applications.
LTC1282ACSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 140k
- 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:
- 2.7V ~ 3.6V, ±3V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1282ACSW#PBF FAQ
1.How can I place an order for LTC1282ACSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1282ACSW#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 LTC1282ACSW#PBF reliable?
The price and inventory of LTC1282ACSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1282ACSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1282ACSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1282ACSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1282ACSW#PBF?
LTC1282ACSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1282ACSW#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 LTC1282ACSW#PBF?
For technical support, including LTC1282ACSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1282ACSW#PBF requirements.
6.How does Aetrix verify that LTC1282ACSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1282ACSW#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 LTC1282ACSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1282ACSW#PBF?
All LTC1282ACSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1282ACSW#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 LTC1282ACSW#PBF part is unused and in its original packaging.
Return procedure for LTC1282ACSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1282ACSW#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
