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Analog Devices Inc. LTC1605ACSW#PBF
- Part No.:
- LTC1605ACSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1605ACSW#PBF.pdf
- Description:
- IC ADC 16BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
LTC1605ACSW#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 100ksps sampling analog-to-digital converter with ±10V bipolar input range, internal 2.5V reference, and parallel 16-bit or two-byte digital output. It operates from a single 5V supply, draws 11–16mA, and delivers ±2.0LSB integral nonlinearity and 87.5dB SINAD at 1kHz - used in industrial process control and high-speed PC-based data acquisition systems.
For engineers reviewing the LTC1605ACSW#PBF datasheet, LTC1605ACSW#PBF pinout, LTC1605ACSW#PBF application, or LTC1605ACSW#PBF equivalent, key selection considerations include guaranteed no missing codes over temperature, microprocessor-compatible BUSY/CS/R/C timing interface, ±25V input overvoltage protection, and SW-package thermal performance (θJA = 130°C/W).
Technical Context
The LTC1605ACSW#PBF implements a switched-capacitor successive approximation architecture with integrated sample-and-hold, precision bandgap reference, and trimmed internal clock - eliminating external timing components. Its dual ground structure (AGND1, AGND2, DGND) and separate analog/digital supplies (VANA, VDIG) support high-accuracy DC and AC performance.
It supports two data read modes: full 16-bit parallel output (D15–D0) or byte-swapped 8-bit reads controlled by the BYTE pin. Conversion is initiated via CS and R/C logic with BUSY indicating active conversion; data validity is synchronized to BUSY rising edge, enabling reliable interfacing with FIFOs, DSPs, and microprocessors without external handshaking logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes for high-fidelity signal digitization |
| Sampling Rate | 100ksps - enables real-time capture of signals up to 50kHz Nyquist bandwidth |
| Input Range | ±10V - matches standard industrial sensor outputs and PLC I/O levels |
| INL | ±2.0LSB max - ensures monotonicity and <0.003% full-scale linearity error |
| SINAD | 87.5dB typ at 1kHz - corresponds to ~14.5 effective bits for clean spectral analysis |
| Power Dissipation | 55mW typ - allows operation in thermally constrained embedded systems |
| Reference | Internal 2.500V ±5ppm/°C - provides stable ±10V full-scale scaling without external components |
Pinout & Package
Package: 28-Lead Plastic SO Wide (SW), RoHS-compliant lead-free finish, exposed pad grounded for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Analog Input | Accepts ±10V differential input; protected to ±25V; requires 200Ω series resistor per datasheet layout |
| AGND1 (2), AGND2 (5) | Analog Ground | Separate low-noise return paths for reference and input circuitry; must tie to analog ground plane |
| REF (3) | 2.5V Reference Output | Factory-trimmed bandgap voltage; bypassed with 2.2µF tantalum; can be overdriven by external reference |
| CAP (4) | Reference Buffer Output | Drives internal DAC; decoupled with 2.2µF tantalum; supports ≤2mA DC load only |
| D15–D0 (6–13, 15–22) | Three-State Data Outputs | 16-bit parallel output; Hi-Z when CS high or R/C low; byte order configurable via BYTE pin |
| BUSY (26) | Status Output | Active-low during conversion; rising edge indicates valid data; synchronizes read timing |
| R/C (24), CS (25) | Control Inputs | Edge-triggered conversion start and data enable; support flexible microprocessor/DSP interface protocols |
| VANA (27), VDIG (28) | Power Supplies | Separate 5V analog and digital rails; require 0.1µF ceramic + 10µF tantalum bypassing each |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed No Missing Codes | Ensures monotonic transfer function across full temperature range (0°C to 70°C), critical for closed-loop control integrity |
| Internal Synchronized Clock | Eliminates external crystal or oscillator; achieves consistent 100ksps throughput without timing component variation |
| ±25V Input Overvoltage Protection | Prevents latch-up and damage from transient surges common in industrial field wiring environments |
| Two-Byte Read Mode (BYTE pin) | Enables 8-bit microcontroller interfacing without data bus widening, reducing PCB routing complexity |
| Trimmed Internal Reference | 2.500V ±0.3% initial accuracy and ±5ppm/°C drift enable ±10V full-scale operation without calibration hardware |
Applications
| Industrial Process Control | Multiplexed Data Acquisition Systems |
|---|---|
Use Scenario: Digitizing 4–20mA current loop outputs and ±10V sensor signals from pressure, temperature, and flow transmitters in PLC backplanes. IC Role / Device Role / Timing Role: High-accuracy ADC front-end with bipolar input handling and robust noise immunity for continuous monitoring. Use Value: ±2.0LSB INL and 87.5dB SINAD ensure sub-0.01% measurement uncertainty over temperature, meeting ISA-88 Class A requirements. | Use Scenario: Scanning multiple analog channels (e.g., 16 thermocouples) using external multiplexer and sample-and-hold before digitization. IC Role / Device Role / Timing Role: Precision sampling node with fast 8µs conversion time and BUSY-synchronized read for deterministic channel sequencing. Use Value: 100ksps aggregate rate supports ≥6.25ksps per channel across 16 inputs, enabling real-time thermal profiling in manufacturing equipment. |
| High-Speed Data Acquisition for PCs | Digital Signal Processing |
Use Scenario: Add-on DAQ cards for test benches capturing vibration, audio, or power quality waveforms at >50kHz bandwidth. IC Role / Device Role / Timing Role: Standalone ADC with parallel bus interface directly connected to FPGA or PCI bridge logic. Use Value: 16-bit resolution and 87.5dB SINAD preserve dynamic range for FFT-based spectral analysis without dithering or oversampling. | Use Scenario: Front-end digitization in motor control inverters, where current sensing feeds real-time FOC (Field-Oriented Control) algorithms. IC Role / Device Role / Timing Role: Low-latency analog input stage with precise timing alignment between current samples and PWM switching events. Use Value: Aperture jitter <100ps and 40ns aperture delay enable <0.1° phase error in 1kHz current feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7805UB | 16-bit, 100ksps, ±10V input, but requires external reference and clock; higher power (100mW) | Lacks integrated reference and clock - increases BOM count and layout sensitivity to noise | Choose ADS7805UB only if external reference trimming or custom clock synchronization is required |
| AD976ARZ | 16-bit, 100ksps, ±10V input, internal reference, but uses serial SPI interface instead of parallel bus | Reduces pin count and PCB area but adds software overhead for data framing and timing | Choose AD976ARZ when microcontroller GPIO resources are limited and SPI infrastructure already exists |
Compared with ADS7805UB and AD976ARZ, the LTC1605ACSW#PBF offers lowest system-level integration (reference + clock + parallel interface), fastest hardware-driven data throughput, and superior ease-of-use for microprocessor-centric designs - making it optimal for cost-sensitive industrial DAQ where layout simplicity and deterministic timing are prioritized.
Availability
LTC1605ACSW#PBF is available at Aetrix Electronics and suitable for industrial process control, multiplexed data acquisition systems, and high-speed PC-based DAQ requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1605ACSW#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 LTC1605ACSW#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered specifically for high-resolution, low-power, single-supply industrial measurement systems demanding guaranteed monotonicity and minimal external component count.
FAQ
What is the operating temperature range for the LTC1605ACSW#PBF?
The LTC1605ACSW#PBF is rated for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "C" suffix in the part number and the ORDER INFORMATION table, which lists LTC1605ACSW#PBF under the 0°C to 70°C temperature range column. The device guarantees all DC specifications - including ±2.0LSB INL and no missing codes - across this full range.
Does the LTC1605ACSW#PBF require an external clock source?
No, the LTC1605ACSW#PBF does not require an external clock source. It integrates a factory-trimmed internal clock that delivers a typical conversion time of 8µs and ensures a guaranteed 100ksps sampling rate. The datasheet explicitly states "Internal Synchronized Clock" as a feature and confirms timing parameters like tCONV (8µs) and fSAMPLE(MAX) (100kHz) are met without external timing components.
How is the analog input protected on the LTC1605ACSW#PBF?
The LTC1605ACSW#PBF provides ±25V absolute maximum rating on VIN, with internal clamping diodes that safely handle overvoltage transients. Per Absolute Maximum Ratings, VIN may swing to ±25V without latch-up, and the device tolerates input currents exceeding 100mA below ground or above VANA. This protection is designed for harsh industrial environments where field wiring faults or ESD events occur.
Can the LTC1605ACSW#PBF operate with an external reference?
Yes, the LTC1605ACSW#PBF supports external reference operation. The REF pin accepts an external 2.30V to 2.70V reference voltage, enabling improved temperature stability beyond the internal ±5ppm/°C drift. When using an external reference, the internal reference is disabled, and full-scale range remains ±4×VREF - so a 2.5V external reference maintains the standard ±10V input range.
What package type does the LTC1605ACSW#PBF use, and what are its thermal characteristics?
The LTC1605ACSW#PBF uses a 28-Lead Plastic SO Wide (SW) package with RoHS-compliant lead-free finish. Its thermal resistance is θJA = 130°C/W, as specified in the Absolute Maximum Ratings table. The exposed pad (pin #) must be soldered to the PCB ground plane to achieve this rating and ensure reliable operation at full 55mW dissipation within the 0°C to 70°C ambient range.
LTC1605ACSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- 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:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1605ACSW#PBF FAQ
1.How can I place an order for LTC1605ACSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1605ACSW#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 LTC1605ACSW#PBF reliable?
The price and inventory of LTC1605ACSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1605ACSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1605ACSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1605ACSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1605ACSW#PBF?
LTC1605ACSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1605ACSW#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 LTC1605ACSW#PBF?
For technical support, including LTC1605ACSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1605ACSW#PBF requirements.
6.How does Aetrix verify that LTC1605ACSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1605ACSW#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 LTC1605ACSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1605ACSW#PBF?
All LTC1605ACSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1605ACSW#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 LTC1605ACSW#PBF part is unused and in its original packaging.
Return procedure for LTC1605ACSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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