My Inquiry
My Account
Analog Devices Inc. LTC2357ILX-18#PBF
- Part No.:
- LTC2357ILX-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2357ILX-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,616
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2357ILX-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, quad-channel simultaneous-sampling SAR ADC with picoamp-input buffered differential inputs, ±10.24V input range, 350ksps/ch throughput, and integrated 4.096V reference buffer. It operates from ±15V analog supplies and 5V digital supply, supports SPI CMOS/LVDS interfaces, and targets high-precision industrial voltage monitoring.
For engineers reviewing the LTC2357ILX-18#PBF datasheet, LTC2357ILX-18#PBF pinout, LTC2357ILX-18#PBF application, or LTC2357ILX-18#PBF equivalent, key selection criteria include per-channel SoftSpan configuration, 128dB CMRR at 200Hz, ±3.5LSB INL over ±10.24V range, rail-to-rail input overdrive tolerance, and 48-lead LQFP package thermal performance at –40°C to +85°C.
Technical Context
The LTC2357ILX-18#PBF implements a true 4-channel simultaneous sampling architecture using independent S/H circuits per channel, enabling synchronized acquisition across all inputs without inter-channel skew. Its SoftSpan™ input range selection allows per-conversion configuration of ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V on each channel via register control.
It integrates picoamp-input analog buffers with >1000GΩ input resistance and 3pF capacitance, supporting direct connection to high-impedance sensors while maintaining 96.4dB SNR and –110dB THD at 2kHz. The internal reference buffer delivers 4.096V with 5ppm/°C tempco and supports external overdrive up to 5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no missing codes - ensures full dynamic range utilization in precision measurement systems. |
| Sampling Rate | 350ksps per channel (simultaneous) - enables real-time capture of fast transients across four channels without time interleaving artifacts. |
| INL Error | ±3.5LSB max (±10.24V range) - maintains linearity critical for calibration-critical applications like power quality analyzers. |
| SNR | 96.4dB typical (±10.24V, fIN=2kHz) - supports >15.7 effective bits, sufficient for 0.001% accuracy voltage digitization. |
| CMRR | 128dB typical at 200Hz - rejects common-mode noise from motor drives or long sensor cables in industrial environments. |
| Input Leakage | 5pA max (I-grade, 85°C) - preserves signal integrity when interfacing with high-Z sources such as piezoelectric sensors or strain gauge bridges. |
| Reference Voltage | 4.096V internal buffered output - provides stable, low-drift scaling for absolute measurements without external reference circuitry. |
| Package | 48-lead 7mm × 7mm LQFP - offers thermal performance (θJA = 53°C/W) suitable for convection-cooled industrial PCBs. |
Pinout & Package
48-lead plastic LQFP (7mm × 7mm, LX package), exposed pad, RoHS-compliant, rated for –40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ / IN0– to IN3+ / IN3– | Differential analog inputs (4 channels) | Accept ±10.24V signals with 30VP-P common mode range; rail-to-rail overdrive tolerance prevents latch-up. |
| VCC / VEE | Analog supply rails | Support ±15V operation (7.5V to 38V difference); enable wide input voltage swing without external level-shifting. |
| VDD / OVDD | Digital core and I/O supplies | VDD = 4.75–5.25V; OVDD = 1.71–5.25V (CMOS) or 2.375–5.25V (LVDS) - supports mixed-voltage system interfacing. |
| REFBUF / REFIN | Reference buffer output and input | REFBUF = 4.096V (typical); REFIN accepts 1.25–2.2V for external reference override or 0V to disable buffer. |
| CS / CNV / BUSY / SDOx / SCKI / SCKO | Serial interface control and data | Configurable CMOS (1.8–5V) or LVDS I/O; supports 1–4 data lanes for flexible throughput vs. bus width trade-off. |
| PD | Power-down control | Active-high signal reduces current to <1μA; wake-up time 200ms - enables low-power sleep modes in battery-backed systems. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel SoftSpan™ range selection | Independent ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V configuration per conversion - eliminates need for external gain-switching circuitry. |
| Simultaneous sampling with matched aperture delay | 150ps max channel-to-channel aperture delay matching - preserves phase coherence for multi-phase power analysis or vibration sensing. |
| Integrated reference buffer with overdrive capability | 4.096V output, 5ppm/°C drift, supports external 2.5–5V overdrive - simplifies system-level calibration and improves long-term stability. |
| Rail-to-rail input overdrive tolerance | Withstands ±(VCC–VEE) differential overvoltage without corruption - protects against transient surges in motor control feedback loops. |
| 128dB CMRR at 200Hz | Rejects common-mode noise from variable-frequency drives or EMI-rich factory floors - reduces need for external filtering components. |
| 5pA max input leakage (85°C) | Minimizes offset error when measuring microvolt-level signals from high-impedance sources - critical for thermocouple or pH probe interfaces. |
Applications
| Power Line Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Real-time measurement of phase voltages and currents in 3-phase distribution panels with harmonic analysis up to 50th order. IC Role / Device Role / Timing Role: Simultaneous 4-channel acquisition captures voltage and current waveforms with sub-ns timing alignment for accurate power factor and THD calculation. Use Value: 96.4dB SNR and –110dB THD enable precise spectral decomposition; ±10.24V range directly interfaces with ±10V CT/PT outputs without attenuation. | Use Scenario: Closed-loop control of temperature, pressure, and flow in chemical reactors using 4-wire RTD and strain gauge sensors. IC Role / Device Role / Timing Role: Digitizes buffered sensor outputs with picoamp input bias, enabling high-impedance bridge configurations without gain errors. Use Value: 5pA input leakage and 128dB CMRR suppress noise from 50/60Hz mains coupling; SoftSpan allows unified 0–10V or ±5V sensor scaling. |
| Test and Measurement Equipment | Programmable Logic Controllers |
Use Scenario: Modular DAQ modules in automated test systems requiring synchronized multi-channel voltage capture at 350ksps. IC Role / Device Role / Timing Role: Acts as front-end ADC with LVDS serial interface for noise-immune backplane communication to FPGA host. Use Value: LVDS support (350mV differential swing) enables >100MHz clock rates; 48-LQFP package fits high-density modular chassis layouts. | Use Scenario: Analog input expansion for PLC main controllers handling motor drive feedback, safety interlocks, and analog setpoints. IC Role / Device Role / Timing Role: Provides isolated, high-accuracy analog inputs with programmable ranges to adapt to diverse field device standards (0–10V, ±10V, 4–20mA with shunt). Use Value: Per-channel SoftSpan eliminates external jumper configuration; 30VP-P common mode range accommodates ground potential differences in distributed I/O racks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 18-bit, 8-channel, 1MSPS, parallel/serial interface; requires external reference; 64-lead LQFP. | Higher channel count and speed but larger footprint and no integrated reference buffer. | Select for systems needing >4 channels or faster sampling; accept added BOM cost and layout complexity for external reference. |
| ADS8684 | 18-bit, 4-channel, 500ksps, single-supply (5V), integrated PGA; SPI-only; 48-QFN. | Lower analog supply complexity (no ±V rails), but lacks simultaneous sampling and has lower CMRR (105dB). | Select for space-constrained, single-supply designs where simultaneous sampling is not required and common-mode noise is minimal. |
Compared with AD7606C-18 and ADS8684, the LTC2357ILX-18#PBF uniquely combines integrated reference buffering, true simultaneous sampling, ±15V analog operation, and 128dB CMRR - making it optimal for high-noise, multi-sensor industrial monitoring where timing coherence and analog robustness are non-negotiable.
Availability
LTC2357ILX-18#PBF is available at Aetrix Electronics and suitable for power line monitoring, industrial process control, and test and measurement equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2357ILX-18#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2357 family was designed specifically for high-accuracy, multi-channel voltage digitization in harsh industrial environments - emphasizing simultaneous sampling integrity, wide common-mode rejection, and robust analog input protection.
FAQ
What is the maximum sampling rate per channel for the LTC2357ILX-18#PBF?
The LTC2357ILX-18#PBF achieves 350ksps per channel when all four channels are enabled simultaneously. If fewer channels are active, the per-channel rate increases: 425ksps (3 channels), 550ksps (2 channels), and 800ksps (1 channel). This scalability is achieved through internal resource allocation without changing the conversion architecture or timing constraints of the LTC2357ILX-18#PBF.
Does the LTC2357ILX-18#PBF require an external reference voltage?
No, the LTC2357ILX-18#PBF includes an integrated 4.096V reference buffer (REFBUF) with 5ppm/°C temperature coefficient and supports external overdrive between 2.5V and 5V. When REFIN is grounded, the internal buffer is disabled, allowing use of an external reference - but the LTC2357ILX-18#PBF functions fully with its internal reference for most precision applications.
What is the input common mode voltage range supported by the LTC2357ILX-18#PBF?
The LTC2357ILX-18#PBF supports a 30VP-P common mode range, specified as VEE + 4V to VCC – 4V. With standard ±15V supplies, this yields –11V to +11V common mode - enabling direct connection to industrial sensors and transducers without level-shifting circuitry. The LTC2357ILX-18#PBF maintains 128dB CMRR at 200Hz across this full range.
How does the SoftSpan™ feature work on the LTC2357ILX-18#PBF?
SoftSpan™ allows per-conversion, per-channel configuration of input ranges: ±10.24V, 0–10.24V, ±5.12V, or 0–5.12V - selected via SPI register writes. Each channel's range is independently set, enabling mixed-signal acquisition (e.g., one channel measuring ±10V motor voltage, another reading 0–5V temperature sensor) without hardware reconfiguration. This flexibility is intrinsic to the LTC2357ILX-18#PBF's architecture.
What digital interface options does the LTC2357ILX-18#PBF support?
The LTC2357ILX-18#PBF supports both SPI CMOS (1.8V–5V logic levels) and LVDS serial interfaces, selectable via pin configuration. In CMOS mode, 1–4 data lanes can be used for throughput optimization; in LVDS mode, differential signaling provides noise immunity for longer traces or noisy environments. Both interfaces share the same command protocol, ensuring software compatibility across physical layer choices for the LTC2357ILX-18#PBF.
LTC2357ILX-18#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 350k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 4
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 7.5V ~ 38V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2357ILX-18#PBF FAQ
1.How can I place an order for LTC2357ILX-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2357ILX-18#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 LTC2357ILX-18#PBF reliable?
The price and inventory of LTC2357ILX-18#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2357ILX-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2357ILX-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2357ILX-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2357ILX-18#PBF?
LTC2357ILX-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2357ILX-18#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 LTC2357ILX-18#PBF?
For technical support, including LTC2357ILX-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2357ILX-18#PBF requirements.
6.How does Aetrix verify that LTC2357ILX-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2357ILX-18#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 LTC2357ILX-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2357ILX-18#PBF?
All LTC2357ILX-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2357ILX-18#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 LTC2357ILX-18#PBF part is unused and in its original packaging.
Return procedure for LTC2357ILX-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2357ILX-18#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…
