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Analog Devices Inc. LTC1605-1IG#PBF
- Part No.:
- LTC1605-1IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1605-1IG#PBF.pdf
- Description:
- IC ADC 16BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,432
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Product details
Overview
LTC1605-1IG#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 100ksps sampling ADC with unipolar 0V to 4V input range, internal 2.5V reference, and integrated sample-and-hold - designed for precision data acquisition in industrial process control and DSP interfacing. It operates from a single 5V supply, draws 11–16mA typical current, delivers 86dB SNR, and resides in a 28-pin SSOP package rated for –40°C to +85°C.
For engineers reviewing the LTC1605-1IG#PBF datasheet, LTC1605-1IG#PBF pinout, LTC1605-1IG#PBF application, or LTC1605-1IG#PBF equivalent, key selection considerations include its 16-bit resolution with ±3 LSB INL, microprocessor-compatible parallel interface (16-bit or byte-mode), BUSY-driven timing control, and support for external reference upgrade - all within a thermally robust industrial-grade package.
Technical Context
The LTC1605-1IG#PBF implements a switched-capacitor successive approximation architecture with an internal 16-bit capacitive DAC, factory-trimmed bandgap reference, and synchronized internal clock. Its analog front-end includes auto-zeroing circuitry and overvoltage protection to ±25V on VIN.
Digital interface logic supports two operational modes: R/C-triggered conversion with CS held low, or CS-triggered conversion with R/C pre-asserted. Output data format is straight binary, and BYTE pin controls MSB-first vs. LSB-first 8-bit byte ordering on D15–D0 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization. |
| Sampling Rate | 100 ksps - enables real-time capture of signals up to ~275 kHz full-power bandwidth. |
| Analog Input Range | 0 V to 4 V - unipolar range optimized for sensor outputs, DAC feedback, and industrial 0–4 V/0–5 V systems. |
| Signal-to-Noise Ratio | 86 dB typ - ensures ≥14-bit effective resolution under DC and low-frequency AC conditions. |
| Integral Nonlinearity | ±3 LSB max - guarantees monotonicity and ≤0.005% full-scale linearity error across temperature. |
| Power Dissipation | 55 mW typ at 5 V - enables low-thermal-load integration into space-constrained industrial modules. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial ambient environments without derating. |
Pinout & Package
Package: 28-lead plastic SSOP (G package), exposed pad soldered to PCB ground for thermal and noise performance. θJA = 95°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Analog input | Accepts 0 V to 4 V unipolar signal; protected to ±25 V; requires 200 Ω series resistor per layout guidance. |
| AGND1 (2), AGND2 (5) | Analog ground | Separate analog return paths; must tie to clean analog ground plane - not shared with DGND unless at single-point star. |
| REF (3) | 2.5 V reference output | Factory-trimmed bandgap source; bypass with 2.2 µF tantalum; can be overdriven by external reference for improved accuracy. |
| CAP (4) | Reference buffer output | Drives internal DAC; provides low-impedance 2.5 V for external decoupling; supports ≤2 mA DC load. |
| D15–D0 (6–13, 15–22) | Three-state parallel data bus | 16-bit straight-binary output; Hi-Z when CS high or R/C low; BYTE pin selects MSB-first (BYTE = L) or LSB-first (BYTE = H) byte order. |
| BUSY (26) | Conversion status flag | Active-low open-drain output; goes high at end of conversion to indicate valid data; rising edge synchronizes data read timing. |
| R/C (24) | Read/Convert control | Falling edge (with CS low) initiates conversion; rising edge (with CS low) enables output drivers - defines primary timing mode. |
| CS (25) | Chip select | OR'd internally with R/C; falling edge (with R/C low) starts conversion; falling edge (with R/C high) enables data output. |
| VANA (27), VDIG (28) | Analog & digital supplies | Both require 4.75–5.25 V; VANA powers analog core; VDIG powers digital logic; bypass each with 0.1 µF ceramic + 10 µF tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V supply operation | Eliminates need for dual ±5 V or ±15 V rails - simplifies power design and reduces BOM cost in embedded DAQ systems. |
| Internal 2.5 V reference with ±5 ppm/°C tempco | Enables stable 0–4 V full-scale range without external reference components - reduces board area and calibration complexity. |
| Microprocessor-compatible parallel interface | Supports direct connection to 8/16-bit microcontrollers and DSPs via CS/R/C/BUSY handshaking - no glue logic required. |
| Overvoltage protected analog input (±25 V) | Withstands transient surges common in industrial field wiring - improves system reliability without external clamping circuits. |
| Factory-trimmed integral linearity (±3 LSB) | Guarantees monotonic 16-bit transfer function across temperature - critical for closed-loop control and metrology applications. |
Applications
| Industrial Process Control | Multiplexed Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors in PLC I/O modules with 4–20 mA or 0–10 V analog inputs. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs at 100 ksps with 16-bit resolution and low INL. Use Value: Enables sub-0.01% measurement accuracy across –40°C to +85°C ambient, supporting SIL-2 functional safety compliance. |
Use Scenario: High-channel-count DAQ card for test benches, where multiple sensors are scanned via analog multiplexer before digitization. IC Role / Device Role / Timing Role: Sampling ADC with fast acquisition time (2 µs) and BUSY-synchronized readout to coordinate with multiplexer settling. Use Value: Supports >100 channels at effective rates >1 ksps/channel while maintaining 14+ ENOB via internal reference stability. |
| High-Speed PC-Based Data Acquisition | Digital Signal Processing Front-End |
Use Scenario: USB or PCIe DAQ adapter capturing vibration, audio, or acoustic emission signals from transducers. IC Role / Device Role / Timing Role: Precision ADC feeding FPGA or microcontroller with parallel 16-bit data and precise BUSY timing for DMA synchronization. Use Value: Delivers 86 dB SNR and 87 dB SINAD at 1 kHz - sufficient for 14–15 bit effective resolution in spectral analysis applications. |
Use Scenario: Real-time signal conditioning stage before FFT or filtering in motor control, power quality, or communications baseband processing. IC Role / Device Role / Timing Role: ADC providing clean, low-jitter sampled data to DSP memory via parallel bus with minimal interface latency. Use Value: Internal clock and synchronous BUSY output eliminate external timing ICs - reducing jitter and simplifying deterministic sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit, 100ksps sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | SAR ADC with integrated programmable gain amplifier (PGA), SPI interface, and ±10.24 V input range; requires external reference. | Better suited for variable-range sensor inputs; lacks parallel bus and internal reference - increases system complexity for fixed-range use cases. | Select when input signal scaling varies dynamically; avoid if parallel interface or single-supply simplicity is prioritized. |
| MAX11900ETX+ | 18-bit, 100 ksps SAR ADC with internal reference, SPI interface, and 0–5 V input; higher resolution but lower SNR (83 dB) and no BUSY signal. | Offers greater resolution but slower effective throughput due to SPI serialization; lacks hardware handshaking for deterministic timing. | Choose for ultra-high-resolution DC measurements; avoid in real-time control loops requiring BUSY-synchronized parallel reads. |
Compared with ADS8684IPWR and MAX11900ETX+, the LTC1605-1IG#PBF uniquely combines 16-bit parallel output, internal reference, BUSY-driven timing, and industrial temperature rating - making it optimal for deterministic, low-latency, fixed-range industrial DAQ where FPGA/microcontroller parallel bus resources are available.
Availability
LTC1605-1IG#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 assurance, and traceable sourcing.
Supply support for LTC1605-1IG#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 LTC1605-1IG#PBF belongs to ADI's legacy Linear Technology precision data converter family, engineered specifically for high-accuracy, low-power, single-supply industrial data acquisition - emphasizing ease of use, thermal robustness, and minimal external component count.
FAQ
What is the operating temperature range of the LTC1605-1IG#PBF?
The LTC1605-1IG#PBF is specified for operation from –40°C to +85°C, qualifying it for extended industrial environments. This rating is confirmed by the "I" grade suffix and verified in the Absolute Maximum Ratings table, where the operating ambient temperature range is explicitly listed as –40°C to 85°C for the LTC1605-1I variant. The #PBF suffix denotes lead-free finish, fully compatible with this temperature grade.
Does the LTC1605-1IG#PBF require an external clock source?
No, the LTC1605-1IG#PBF does not require an external clock source. It integrates a trimmed internal clock that ensures a typical conversion time of 8 µs and guarantees 100 ksps throughput. The internal clock eliminates timing jitter from external sources and removes the need for external oscillator components - a key feature highlighted in the device description and Timing Characteristics section.
What is the analog input voltage range supported by the LTC1605-1IG#PBF?
The LTC1605-1IG#PBF supports a unipolar analog input range of 0 V to 4 V, as explicitly defined in the Converter Characteristics table under "Analog Input Range" for the LTC1605-1 variant. This range corresponds to 1.6 × VREF, where VREF = 2.5 V. The device also features ±25 V absolute maximum input rating for transient overvoltage protection.
How is data output formatted from the LTC1605-1IG#PBF?
The LTC1605-1IG#PBF outputs data in straight binary format across its 16-bit parallel bus (D15–D0). When BYTE = low, D15–D8 carry the MSB byte and D7–D0 carry the LSB byte; when BYTE = high, the byte order swaps. This dual-byte capability and fixed straight-binary coding are documented in the Digital Interface and Pin Functions sections - distinct from the two's complement format used by the LTC1605-2 variant.
Can the LTC1605-1IG#PBF use an external reference instead of the internal one?
Yes, the LTC1605-1IG#PBF supports external reference operation. The REF pin (Pin 3) may be overdriven with a precision external reference (2.30 V to 2.70 V) to improve accuracy over temperature - a capability explicitly stated in the Features list and validated in the Internal Reference Characteristics table. Doing so disables the internal reference and requires proper decoupling of the external source.
LTC1605-1IG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm 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-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1605-1IG#PBF FAQ
1.How can I place an order for LTC1605-1IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1605-1IG#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 LTC1605-1IG#PBF reliable?
The price and inventory of LTC1605-1IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1605-1IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1605-1IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1605-1IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1605-1IG#PBF?
LTC1605-1IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1605-1IG#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 LTC1605-1IG#PBF?
For technical support, including LTC1605-1IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1605-1IG#PBF requirements.
6.How does Aetrix verify that LTC1605-1IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1605-1IG#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 LTC1605-1IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1605-1IG#PBF?
All LTC1605-1IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1605-1IG#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 LTC1605-1IG#PBF part is unused and in its original packaging.
Return procedure for LTC1605-1IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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