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Analog Devices Inc. LTC1594LIS#PBF
- Part No.:
- LTC1594LIS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1594LIS#PBF.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
LTC1594LIS#PBF from Analog Devices (formerly Linear Technology) is a 3V, 12-bit, 4-channel micropower sampling ADC with integrated multiplexer and serial interface. It delivers ±3/4 LSB DNL, 10.5 ksps sampling rate, and auto-shutdown to 1 nA between conversions. It operates from 2.7V to 3.6V and supports ratiometric or external reference configurations - ideal for battery-powered sensor data acquisition.
For engineers reviewing the LTC1594LIS#PBF datasheet, LTC1594LIS#PBF pinout, LTC1594LIS#PBF application, or LTC1594LIS#PBF equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance over –40°C to +85°C, low-leakage analog inputs (±1 µA), SPI/MICROWIRE/QSPI-compatible 4-wire serial interface, and support for reduced input spans down to 1.5 V full-scale.
Technical Context
The LTC1594LIS#PBF integrates a switched-capacitor successive-approximation ADC with a 4-channel analog multiplexer, sample-and-hold, and independent MUXOUT/ADCIN signal conditioning loop. Its architecture enables channel selection and conversion control via separate CSMUX and CSADC pins, allowing flexible timing and up to 20 ksps operation when used asynchronously.
It features rail-to-rail compatible digital I/O (VIH = 2.0 V min at VCC = 3.6 V, VIL = 0.8 V max at VCC = 2.7 V), high-impedance analog inputs (CIN = 20 pF on-channel), and reference input resistance of 2.7 MΩ (CS = VIH) or 60 kΩ (CS = VIL). Conversion timing is clock-driven: tCONV = 12 CLK cycles, tSMPL = 1.5 CLK cycles, with fCLK up to 200 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit, no missing codes - ensures monotonic transfer function and unambiguous digital output across full range. |
| Sampling Rate | 10.5 ksps maximum - supports real-time monitoring of fast-changing sensor signals in portable instrumentation. |
| Supply Current | 160 µA typ during conversion; 1 nA typ in auto-shutdown - enables multi-year battery life in remote sensing nodes. |
| Differential Nonlinearity | ±3/4 LSB max - guarantees monotonicity and <0.1% integral error for precision measurement applications. |
| Reference Input Range | 1.5 V to VCC + 0.05 V - allows use of low-voltage references (e.g., 1.5 V, 2.048 V, 2.5 V) without external level shifting. |
| Analog Input Range | –0.05 V to VCC + 0.05 V - accommodates small negative offsets and simplifies front-end design with single-supply sensors. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin environments without derating. |
Pinout & Package
The LTC1594LIS#PBF is housed in a 16-pin narrow SO package (S package), with θJA = 120°C/W and TJMAX = 125°C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 (Pins 1–4) | Analog multiplexer inputs | Four single-ended analog inputs selectable via 3-bit address; high-impedance (±200 nA leakage off-channel). |
| ADCIN (Pin 5) | ADC positive input | Accepts conditioned signal from MUXOUT; connects directly to internal S/H node for accurate sampling. |
| VREF (Pin 6) | Reference voltage input | Defines full-scale range; supports external references or ratiometric operation using supply as reference. |
| COM (Pin 7) | ADC negative input / common-mode reference | Serves as return path for differential measurement; must be low-noise and tied to clean analog ground. |
| GND (Pin 8) | Analog ground | Primary analog return; requires direct connection to low-impedance analog ground plane to minimize noise coupling. |
| CSADC (Pin 9) | ADC chip select | Active-low enable for ADC conversion; powers down ADC and three-states DOUT when high. |
| CSMUX (Pin 10) | MUX chip select | Active-low enable for multiplexer channel selection; can be driven independently from CSADC for timing optimization. |
| CLK (Pin 11) | Serial clock input | Synchronizes both MUX addressing and ADC result readout; supports up to 200 kHz for full-speed operation. |
| DIN (Pin 12) | Serial data input | Receives 4-bit channel address (EN + D2:D0); latched on rising CLK edge while CS is high. |
| DOUT (Pin 13) | Serial data output | Outputs 12-bit conversion result LSB-first; tri-stated when CSADC is high. |
| VCC (Pins 14–16) | Power supply | Single 2.7–3.6 V supply; Pins 14 and 16 are dedicated VCC; Pin 15 is NC - bypass each VCC pin individually to GND with 1 µF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| Separate MUX and ADC controls | Enables channel selection once followed by multiple conversions - reduces overhead and increases effective throughput to 20 ksps. |
| MUXOUT/ADCIN loop | Allows insertion of external signal conditioning (e.g., PGA, filter) between multiplexer and ADC - eliminates per-channel circuitry and lowers BOM cost. |
| Low-leakage analog inputs | ±1 µA max ADCIN leakage and ±200 nA MUX channel leakage - preserves accuracy when interfacing high-impedance transducers like thermistors or pH electrodes. |
| Reduced span operation | Supports full-scale ranges as low as 1.5 V - achieves 366 µV LSB resolution without gain amplification, reducing noise and power in sensor front-ends. |
| 3-wire serial option | DIN/DOUT can be tied together with bidirectional MCU I/O - saves PCB routing and GPIO resources in space-constrained designs. |
Applications
| Battery Monitoring | Temperature Measurement |
|---|---|
Use Scenario: Monitoring individual cell voltages in multi-cell Li-ion battery packs for state-of-charge estimation and protection. IC Role / Device Role / Timing Role: 12-bit ADC samples up to four cell voltages sequentially via internal 4-channel MUX; auto-shutdown minimizes quiescent current between readings. Use Value: Enables precise voltage resolution (≤1 mV at 4.2 V full-scale) while drawing only 160 µA during sampling and 1 nA idle - extending battery runtime in portable BMS modules. | Use Scenario: Digitizing outputs from RTDs, thermistors, or semiconductor temperature sensors in HVAC controllers and industrial PLCs. IC Role / Device Role / Timing Role: Converts analog sensor outputs referenced to COM; supports ratiometric operation using same reference for sensor excitation and ADC scaling. Use Value: Eliminates need for external op-amp gain stages due to 1.5 V minimum full-scale range and high-impedance inputs - reducing component count and thermal drift errors. |
| Pen Screen Digitizing | Remote Data Acquisition |
Use Scenario: Reading X/Y coordinate voltages from resistive touchscreens in handheld medical devices and industrial HMIs. IC Role / Device Role / Timing Role: Samples four analog channels (X+, X−, Y+, Y−) in sequence using internal MUX; serial interface transmits results to host MCU over minimal wiring. Use Value: Integrated MUXOUT/ADCIN loop allows simple RC filtering on MUXOUT to suppress switching noise before conversion - improving touchscreen linearity and repeatability. | Use Scenario: Collecting environmental sensor data (pressure, humidity, gas) in wireless sensor nodes deployed in field or hazardous locations. IC Role / Device Role / Timing Role: ADC digitizes sensor outputs; low 160 µA active current and 1 nA shutdown current enable long-life operation on coin cells or energy harvesters. Use Value: Micropower consumption combined with SPI compatibility allows direct interface to ultra-low-power MCUs (e.g., ARM Cortex-M0+) and isolation barriers - simplifying certified isolated designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, micropower, multiplexed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200 ksps, 2.7–5.25 V supply, SPI-only interface, no integrated MUX, higher 1.2 mA active current | Requires external MUX for multi-channel use; unsuitable for sub-200 µA battery systems | Select when higher speed and wider supply range outweigh power and integration needs. |
| MAX11100ETE+ | 12-bit, 100 ksps, 2.7–3.6 V, integrated 8-channel MUX, 150 µA active current, SPI/MICROWIRE compatible | Offers 8 channels vs. 4; slightly lower DNL (±0.5 LSB) but narrower temp range (–40°C to +85°C same) | Prefer when more input channels are required and board space permits larger 16-pin TQFN package. |
Compared with ADS7822U and MAX11100ETE+, the LTC1594LIS#PBF provides superior micropower efficiency (160 µA vs. 150–1200 µA), integrated 4-channel MUX in compact SO-16, and guaranteed ±3/4 LSB DNL - making it optimal for space- and energy-constrained 4-channel sensor interfaces where precision and longevity are critical.
Availability
LTC1594LIS#PBF is available at Aetrix Electronics and suitable for battery monitoring, temperature measurement, pen screen digitizing, and remote data acquisition requiring stable component supply and long-term industrial availability.
Supply support for LTC1594LIS#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 LTC1594LIS#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered specifically for low-power, high-accuracy sensor interfacing in portable and distributed measurement systems.
FAQ
What is the operating temperature range of the LTC1594LIS#PBF?
The LTC1594LIS#PBF is specified for operation from –40°C to +85°C, with all key parameters (DNL, INL, offset, gain) guaranteed across this full industrial temperature range. This makes LTC1594LIS#PBF suitable for deployment in harsh environments such as factory floors, automotive cabins, and outdoor sensor nodes without thermal derating.
Can the LTC1594LIS#PBF operate with a 1.5V reference voltage?
Yes, the LTC1594LIS#PBF supports reference voltages as low as 1.5 V (per REF Input Range specification: 1.5 V to VCC + 0.05 V). At 1.5 V reference, LTC1594LIS#PBF achieves 366 µV LSB resolution - enabling high-precision digitization of low-output sensors without external gain stages.
Does the LTC1594LIS#PBF require external clock circuitry?
No, the LTC1594LIS#PBF uses an external CMOS-compatible clock applied to the CLK pin - no crystal or oscillator is needed. Clock frequency can range from 1 kHz (at 25°C) up to 200 kHz (at 25°C), with minimum recommended frequencies increasing with temperature (e.g., ≥75 kHz at 70°C, ≥200 kHz at 85°C) to maintain S/H accuracy.
How does the MUXOUT/ADCIN loop improve signal integrity in the LTC1594LIS#PBF?
The MUXOUT/ADCIN loop in LTC1594LIS#PBF allows external passive or active circuitry (e.g., RC antialiasing filters, programmable gain amplifiers) to be placed between the multiplexer output and ADC input. This avoids channel-to-channel crosstalk and enables shared signal conditioning - improving SNR and reducing total system noise compared to per-channel front-ends.
Is the LTC1594LIS#PBF pin-compatible with the 5V version LTC1594CSW#PBF?
No, the LTC1594LIS#PBF (3V logic, –40°C to +85°C) is not pin-compatible with the LTC1594CSW#PBF (5V logic, 0°C to +70°C). They share identical pinout and package (16-pin SO), but differ in absolute maximum ratings, input thresholds (VIH/VIL), and operating voltage range - requiring PCB layout and firmware changes for substitution.
LTC1594LIS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1594LIS#PBF FAQ
1.How can I place an order for LTC1594LIS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1594LIS#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 LTC1594LIS#PBF reliable?
The price and inventory of LTC1594LIS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1594LIS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1594LIS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1594LIS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1594LIS#PBF?
LTC1594LIS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1594LIS#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 LTC1594LIS#PBF?
For technical support, including LTC1594LIS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1594LIS#PBF requirements.
6.How does Aetrix verify that LTC1594LIS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1594LIS#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 LTC1594LIS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1594LIS#PBF?
All LTC1594LIS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1594LIS#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 LTC1594LIS#PBF part is unused and in its original packaging.
Return procedure for LTC1594LIS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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