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Analog Devices Inc. LTC1605ISW#PBF
- Part No.:
- LTC1605ISW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1605ISW#PBF.pdf
- Description:
- IC ADC 16BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:220
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Product details
Overview
LTC1605ISW#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 100ksps successive-approximation analog-to-digital converter with internal 2.5V reference, ±10V bipolar input range, and parallel 16-bit two's-complement output. It operates from a single 5V supply, draws 11–16mA, and targets precision data acquisition in industrial process control and DSP interfacing.
For engineers reviewing the LTC1605ISW#PBF datasheet, LTC1605ISW#PBF pinout, LTC1605ISW#PBF application, or LTC1605ISW#PBF equivalent, key selection criteria include guaranteed no missing codes over temperature, ±2.0LSB max INL, 87.5dB typical SINAD at 1kHz, and SW-package compatibility with legacy SO-Wide layouts.
Technical Context
The LTC1605ISW#PBF integrates a switched-capacitor SAR core, auto-zeroed sample-and-hold, factory-trimmed bandgap reference, and internal synchronized clock-eliminating external timing components. Its dual ground architecture (AGND1, AGND2, DGND) enforces analog/digital signal isolation.
It supports microprocessor interface via CS/R/C control logic, BUSY status flag, and BYTE-selectable 16-bit or byte-wide parallel output. Conversion timing is deterministic: 8µs conversion time, 2µs acquisition time, and 10µs minimum inter-conversion interval.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output levels for high-fidelity signal digitization |
| Sampling Rate | 100ksps - enables real-time capture of signals up to 50kHz Nyquist bandwidth |
| INL (Max) | ±2.0LSB - ensures monotonicity and <0.003% full-scale linearity error across temperature |
| Input Range | ±10V - matches industrial sensor outputs and PLC-level signal standards without external scaling |
| Power Dissipation | 55mW typical - allows dense PCB placement without forced cooling in embedded systems |
| SINAD (Typ) | 87.5dB at 1kHz - corresponds to ~14.5 effective bits, validating performance for metrology-grade applications |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
Package: 28-lead plastic SO wide (SW), 0.300" body width, exposed pad connected to GND. Compatible with standard SOIC-W footprints and reflow soldering profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Analog Input | ±10V differential input node; requires 200Ω series resistor and 1000pF local filtering per layout guidelines |
| AGND1 (2), AGND2 (5) | Analog Ground | Separate low-impedance return paths for reference and input circuitry; must tie to common analog ground plane |
| REF (3) | Reference Output | 2.500V ±10mV buffered bandgap reference; bypass with 2.2µF tantalum capacitor to suppress noise |
| CAP (4) | Reference Buffer Output | Stabilized 2.5V drive for internal DAC; supports ≤2mA DC load but not AC loading |
| D15–D0 (6–13, 15–22) | Parallel Data Outputs | Three-state 16-bit two's-complement output bus; Hi-Z when CS high or R/C low |
| BYTE (23) | Byte Select Control | Configures MSB-first (BYTE=low) or LSB-first (BYTE=high) byte ordering on D15–D0 pins |
| R/C (24) | Read/Convert Command | Falling edge initiates conversion when CS is low; rising edge enables data readout |
| CS (25) | Chip Select | Active-low enable for conversion start or data output; internally OR'd with R/C |
| BUSY (26) | Status Flag | Active-low open-drain signal indicating conversion in progress; data valid on rising edge |
| VANA (27) | Analog Supply | 5V analog rail; requires 0.1µF ceramic + 10µF tantalum decoupling directly at pin |
| VDIG (28) | Digital Supply | 5V digital rail; electrically tied to VANA per datasheet; shares same decoupling network |
Key Features
| Feature | Design Value |
|---|---|
| No missing codes | Guaranteed over –40°C to +85°C - eliminates code gaps in closed-loop control or calibration systems |
| Internal reference | 2.500V ±10mV, ±5ppm/°C tempco - removes need for external voltage reference IC in cost-sensitive designs |
| External reference support | Accepts 2.3V–2.7V external source - enables higher accuracy or custom full-scale ranges (e.g., ±12V) |
| Overvoltage protection | ±25V absolute max on VIN - withstands transient surges in industrial field wiring without damage |
| Low aperture jitter | 40ns - preserves SNR in high-frequency sampling applications by minimizing sampling uncertainty |
Applications
| Industrial Process Control | Multiplexed Data Acquisition |
|---|---|
Use Scenario: Monitoring thermocouple, RTD, and 4–20mA loop signals in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog inputs with ±10V range and 16-bit resolution. Use Value: Guaranteed no missing codes and ±2.0LSB INL ensure accurate calibration traceability across operating temperature. |
Use Scenario: Scanning multiple sensor channels using analog multiplexer before ADC input. IC Role / Device Role / Timing Role: High-throughput sampling ADC with 100ksps rate and fast 2µs acquisition time. Use Value: Short acquisition window minimizes channel crosstalk and maximizes system scan rate per second. |
| High-Speed PC Data Acquisition | Digital Signal Processing Interface |
Use Scenario: USB or PCIe-based DAQ cards capturing vibration, audio, or acoustic emission signals. IC Role / Device Role / Timing Role: Precision front-end ADC feeding FPGA or DSP with parallel 16-bit bus. Use Value: 87.5dB SINAD and 87dB SNR at 1kHz meet Class I measurement standards for lab-grade instruments. |
Use Scenario: Real-time sensor fusion in motor control or power electronics monitoring systems. IC Role / Device Role / Timing Role: Synchronized sampling ADC providing time-aligned data to TI C2000 or ADI SHARC processors. Use Value: Deterministic 8µs conversion time and BUSY-driven handshaking simplify real-time interrupt handling. |
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 separate clock; no internal S/H | Higher board area and BOM count due to external ref, clock, and S/H; lower integration | Select when legacy ADS7805 footprint reuse is required and external component overhead is acceptable |
| AD976ARZ | 16-bit, 100ksps, ±10V input, internal ref, but uses CMOS process (vs. BiCMOS); higher power (100mW) | Higher thermal load and reduced noise immunity in mixed-signal environments | Prefer only if AD976ARZ is already qualified in existing design and thermal margin permits |
Compared with ADS7805UB and AD976ARZ, the LTC1605ISW#PBF offers superior integration (internal S/H, clock, and reference), lower power (55mW vs. ≥100mW), and tighter INL (±2.0LSB vs. ±3.0LSB), making it optimal for space- and power-constrained industrial DAQ.
Availability
LTC1605ISW#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 LTC1605ISW#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 LTC1605ISW#PBF belongs to ADI's legacy Linear Technology precision data conversion portfolio, engineered for high-accuracy, low-noise, single-supply industrial data acquisition where reliability and DC performance are critical.
FAQ
What is the operating temperature range for the LTC1605ISW#PBF?
The LTC1605ISW#PBF is rated for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. All key specifications-including INL (±2.0LSB), no missing codes, and 100ksps sampling-are guaranteed across this full range, as confirmed in the converter characteristics table of the official datasheet.
Does the LTC1605ISW#PBF require an external clock source?
No, the LTC1605ISW#PBF includes a fully integrated, factory-trimmed internal clock that delivers a typical conversion time of 8µs and supports the full 100ksps sampling rate without any external timing components. This simplifies system design and improves timing robustness versus externally clocked alternatives.
Can the LTC1605ISW#PBF accept an external reference voltage?
Yes, the LTC1605ISW#PBF supports external reference voltages between 2.3V and 2.7V applied to the REF pin. When used, the device maintains its specified linearity and guarantees no missing codes, enabling improved temperature stability or custom full-scale ranges beyond the default ±10V.
What is the meaning of "SW" in the LTC1605ISW#PBF part number?
The "SW" suffix in LTC1605ISW#PBF denotes the 28-lead plastic SO wide package (0.300" body width), distinct from the SSOP (G) or PDIP (N) variants. It provides mechanical compatibility with legacy SOIC-W footprints and supports standard surface-mount assembly processes.
How does the BYTE pin affect data output formatting on the LTC1605ISW#PBF?
The BYTE pin on the LTC1605ISW#PBF selects parallel output format: when LOW, D15–D8 carry MSBs and D7–D0 carry LSBs; when HIGH, the byte order swaps so D15–D8 output LSBs and D7–D0 output MSBs. This enables flexible alignment with 8-bit microcontroller buses or FPGA byte-lane configurations.
LTC1605ISW#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1605ISW#PBF FAQ
1.How can I place an order for LTC1605ISW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1605ISW#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 LTC1605ISW#PBF reliable?
The price and inventory of LTC1605ISW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1605ISW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1605ISW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1605ISW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1605ISW#PBF?
LTC1605ISW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1605ISW#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 LTC1605ISW#PBF?
For technical support, including LTC1605ISW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1605ISW#PBF requirements.
6.How does Aetrix verify that LTC1605ISW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1605ISW#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 LTC1605ISW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1605ISW#PBF?
All LTC1605ISW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1605ISW#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 LTC1605ISW#PBF part is unused and in its original packaging.
Return procedure for LTC1605ISW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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