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Analog Devices Inc. LTC1594LCS#TRPBF
- Part No.:
- LTC1594LCS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1594LCS#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,603
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Product details
Overview
LTC1594LCS#TRPBF from Analog Devices (formerly Linear Technology) is a 3V, 12-bit, 4-channel micropower sampling ADC with integrated multiplexer and serial interface. It delivers 10.5ksps sampling rate, ±3/4LSB max DNL, 160µA typical supply current during conversion, and auto-shutdown to 1nA between conversions. It operates from 2.7V to 3.6V and supports ratiometric or external reference configurations - ideal for battery-powered sensor monitoring systems.
For engineers reviewing the LTC1594LCS#TRPBF datasheet, LTC1594LCS#TRPBF pinout, LTC1594LCS#TRPBF application, or LTC1594LCS#TRPBF equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance, separate MUX/ADC control via dual chip selects (CSMUX/CSADC), 3-wire SPI/MICROWIRE compatibility, and direct high-impedance analog input capability down to 1.5V full-scale span.
Technical Context
The LTC1594LCS#TRPBF integrates a switched-capacitor successive approximation ADC with on-chip sample-and-hold, a 4-channel analog multiplexer, and a synchronous half-duplex serial interface. Its architecture enables independent control of multiplexer channel selection and ADC conversion timing via CSMUX and CSADC pins.
It supports unipolar transfer characteristics only, with input range from –0.05V to VCC + 0.05V and reference input range from 1.5V to VCC + 0.05V. The device features break-before-make switching (tOPEN = 125–350ns) and maintains 68dB SNR at 1kHz input, enabling precision measurement in noise-sensitive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit, guaranteed no missing codes - ensures monotonicity and full code coverage across temperature. |
| Sampling Rate | 10.5ksps maximum - supports real-time acquisition of signals up to ~5kHz Nyquist bandwidth. |
| Supply Current | 160µA typ during conversion; drops to 1nA in auto-shutdown - enables multi-year battery life in remote sensing. |
| Differential Nonlinearity | ±3/4LSB max - preserves signal fidelity for precision instrumentation and calibration-critical applications. |
| Reference Range | 1.5V to VCC + 0.05V - allows use of low-voltage references (e.g., 1.5V, 2.048V, 2.5V) without external scaling. |
| Analog Input Span | 0V to VCC (with COM referenced to GND) - supports direct connection to sensors with 0–3V output ranges. |
| Serial Interface | 4-wire SPI/MICROWIRE compatible (CS, CLK, DIN, DOUT); supports 3-wire mode with DIN/DOUT tied - reduces MCU pin count and PCB routing complexity. |
Pinout & Package
Package: 16-pin narrow SO (SO-16), RoHS-compliant, lead-free, tape-and-reel (TRPBF suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 (Pins 1–4) | Analog multiplexer inputs | Four single-ended analog input channels; selected via 3-bit address + EN bit on DIN. |
| ADCIN (Pin 5) | Positive ADC input | Connects to MUXOUT for standard operation; accepts conditioned or filtered signal in MUXOUT/ADCIN loop. |
| VREF (Pin 6) | Reference voltage input | Defines full-scale range; supports external reference or ratiometric use with supply rail. |
| COM (Pin 7) | Negative ADC input | Common-mode reference point; must be low-noise and tied directly to analog ground plane. |
| GND (Pin 8) | Analog ground | Primary analog return path; requires dedicated low-impedance connection to system AGND. |
| CSADC (Pin 9) | ADC chip select | Active-low enable for ADC conversion; powers down ADC and tristates DOUT when high. |
| CSMUX (Pin 10) | MUX chip select | Active-low enable for multiplexer channel selection; used independently or in parallel with CSADC. |
| CLK (Pin 11) | Serial clock input | Synchronizes data transfer; determines conversion speed (fCLK ≤ 200kHz at 2.7V). |
| DIN (Pin 12) | Serial data input | Receives 4-bit channel address (EN + D2–D0); latched on rising CLK edge. |
| DOUT (Pin 13) | Serial data output | Outputs 12-bit LSB-first conversion result; tristated when CSADC is high. |
| NC (Pins 14–15) | No connection | Not internally bonded; must remain unconnected per datasheet. |
| VCC (Pin 16) | Power supply | 2.7V–3.6V analog/digital supply; requires local 1µF ceramic bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Separate MUX and ADC control | Enables channel selection once for multiple conversions - increases effective throughput to 20ksps and simplifies timing in burst-mode acquisition. |
| MUXOUT/ADCIN loop | Allows insertion of external signal conditioning (e.g., PGA, antialias filter) between multiplexer and ADC - eliminates per-channel circuitry and reduces BOM cost. |
| Break-before-make switching | tOPEN = 125–350ns guarantees no channel shorting during reconfiguration - prevents crosstalk and transient injection in multi-sensor systems. |
| Rail-to-rail logic compatibility | VIH = 2.0V min at VCC = 3.6V; VIL = 0.8V max at VCC = 2.7V - ensures reliable interfacing with 3V microcontrollers and level-shifters. |
| Low-input-leakage analog path | ADCIN leakage ≤ ±1µA; MUX channel leakage ≤ ±200nA - preserves accuracy with high-impedance sources (e.g., thermistors, pH electrodes). |
Applications
| Battery Monitoring | Remote Data Acquisition |
|---|---|
|
Use Scenario: Measuring individual cell voltages in 3S Li-ion battery packs using a single ADC with ratiometric reference. IC Role / Device Role / Timing Role: 4-channel multiplexer sequentially routes cell voltages to 12-bit ADC; auto-shutdown minimizes quiescent current between samples. Use Value: Eliminates need for four discrete ADCs or external multiplexer drivers - reduces board area by >40% and extends battery life beyond 5 years in sleep mode. |
Use Scenario: Collecting temperature, humidity, and pressure readings from distributed environmental sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Micropower ADC samples each sensor channel at 1Hz, then shuts down; serial interface transmits data over low-power RF link. Use Value: 1nA shutdown current enables >10-year operational lifetime; 1.5V minimum reference support allows use of ultra-low-power bandgap references. |
| Pen Screen Digitizing | Isolated Data Acquisition |
|
Use Scenario: Converting analog X/Y coordinate signals from resistive touch screens in portable medical devices. IC Role / Device Role / Timing Role: 4-channel MUX scans X+ X− Y+ Y− electrodes; 12-bit resolution captures sub-millimeter stylus position with <0.5% linearity error. Use Value: Guaranteed ±3/4LSB DNL ensures smooth cursor tracking; high-impedance inputs eliminate need for buffer op-amps before ADC. |
Use Scenario: Acquiring industrial sensor signals across galvanic isolation barriers (e.g., optocouplers or digital isolators). IC Role / Device Role / Timing Role: ADC resides on field-side; serial interface communicates through isolated SPI bus - minimizing component count on isolated side. Use Value: 3-wire mode (DIN/DOUT shared) reduces isolator channel count by one; micropower operation lowers isolated-side power budget requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit micropower SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200ksps, 2.7–5.5V supply, SPI-only interface, no integrated MUX. | Higher speed but lower resolution; lacks multiplexer and flexible reference support - unsuitable for multi-channel precision sensing. | Select only if 8-bit resolution suffices and higher throughput is required; requires external MUX for multi-channel use. |
| MAX11100ETE+ | 12-bit, 100ksps, internal reference, 2.7–3.6V, 10-pin µMAX package, no MUX. | Higher sampling rate and integrated reference simplify design, but lacks multiplexer and separate MUX/ADC control. | Preferable for single-channel applications where space is critical and external MUX is acceptable; not drop-in for 4-channel systems. |
Compared with ADS7822U and MAX11100ETE+, the LTC1594LCS#TRPBF uniquely combines 12-bit precision, integrated 4-channel MUX, dual chip-select flexibility, and sub-µA shutdown - making it optimal for compact, multi-sensor, battery-constrained designs where channel density and power efficiency are co-prioritized.
Availability
LTC1594LCS#TRPBF is available at Aetrix Electronics and suitable for battery monitoring, remote data acquisition, pen screen digitizing, and isolated data acquisition requiring stable component supply and long-term production continuity.
Supply support for LTC1594LCS#TRPBF 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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for all LTC-branded precision analog ICs.
The LTC1594LCS#TRPBF belongs to Linear's legacy micropower SAR ADC family, designed specifically for ultra-low-power, multi-channel sensing in portable and remote instrumentation where accuracy, integration, and energy efficiency are jointly critical.
FAQ
What is the operating voltage range for the LTC1594LCS#TRPBF?
The LTC1594LCS#TRPBF operates from 2.7V to 3.6V on a single supply. It is specified for guaranteed performance across this range, including 12-bit resolution, ±3/4LSB DNL, and 10.5ksps sampling rate at 2.7V. Operation below 2.7V is not characterized and may result in degraded linearity or failure to meet timing specifications.
Does the LTC1594LCS#TRPBF support 3-wire SPI communication?
Yes, the LTC1594LCS#TRPBF supports 3-wire SPI mode by tying DIN and DOUT together. In this configuration, the microcontroller must configure the data pin as bidirectional, releasing control after CS falls and before the 6th falling CLK edge. The LTC1594LCS#TRPBF automatically manages directionality during data exchange.
Can the LTC1594LCS#TRPBF operate with a 1.5V reference voltage?
Yes, the LTC1594LCS#TRPBF supports reference voltages as low as 1.5V (per datasheet Note 7 and REF Input Range specification). At 1.5V reference, full-scale resolution is 366µV (1.5V / 4096), enabling precise low-voltage measurements without gain stages - provided VCC ≥ 2.95V to maintain 0V–1.5V input range integrity.
What is the purpose of separate CSMUX and CSADC pins on the LTC1594LCS#TRPBF?
The separate CSMUX and CSADC pins allow independent control of multiplexer channel selection and ADC conversion initiation. This enables advanced timing schemes - such as selecting a channel once and performing multiple conversions, or interleaving MUX reconfiguration with ADC reads - increasing effective sampling rate up to 20ksps and improving system-level timing predictability in the LTC1594LCS#TRPBF.
Is the LTC1594LCS#TRPBF pin-compatible with the LTC1594LIS#TRPBF?
Yes, the LTC1594LCS#TRPBF and LTC1594LIS#TRPBF share identical pinout and package (16-pin SO), differing only in temperature grade: LTC1594LCS#TRPBF is rated for 0°C to 70°C, while LTC1594LIS#TRPBF extends to –40°C to 85°C. Electrical specifications are identical within their respective temperature ranges, allowing direct substitution where ambient conditions permit.
LTC1594LCS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 16.8k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1594LCS#TRPBF FAQ
1.How can I place an order for LTC1594LCS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1594LCS#TRPBF 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 LTC1594LCS#TRPBF reliable?
The price and inventory of LTC1594LCS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1594LCS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1594LCS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1594LCS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1594LCS#TRPBF?
LTC1594LCS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1594LCS#TRPBF 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 LTC1594LCS#TRPBF?
For technical support, including LTC1594LCS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1594LCS#TRPBF requirements.
6.How does Aetrix verify that LTC1594LCS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1594LCS#TRPBF 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 LTC1594LCS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1594LCS#TRPBF?
All LTC1594LCS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1594LCS#TRPBF, 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 LTC1594LCS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1594LCS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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