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Analog Devices Inc. LTC1594CS#TRPBF
- Part No.:
- LTC1594CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1594CS#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
LTC1594CS#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 4-channel micropower sampling ADC with integrated multiplexer, serial I/O interface, and auto-shutdown. It operates on a single 5V supply, draws 320μA typical supply current during conversion at 16.8ksps, and powers down to 1nA between conversions. It features separate MUXOUT/ADCIN pins for flexible signal conditioning and supports ratiometric or external reference operation - ideal for battery-powered remote data acquisition systems.
For engineers reviewing the LTC1594CS#TRPBF datasheet, LTC1594CS#TRPBF pinout, LTC1594CS#TRPBF application, or LTC1594CS#TRPBF equivalent, key selection criteria include guaranteed ±3/4 LSB DNL, 1.5V–5V programmable input span, SPI/MICROWIRE/QSPI-compatible 4-wire serial interface, and SO-16 package compatibility with isolated sensor front-ends and low-power embedded monitoring.
Technical Context
The LTC1594CS#TRPBF integrates a switched-capacitor successive-approximation ADC with a 4-channel analog multiplexer, sample-and-hold, and dual independent chip selects (CSMUX and CSADC). Its architecture enables break-before-make channel switching with 35ns minimum tOPEN and supports separate control of multiplexer and ADC stages to maximize throughput up to 20ksps in optimized configurations.
It uses a synchronous half-duplex serial interface where DIN latches on rising CLK edges and DOUT shifts out on falling CLK edges. The device accepts a 4-bit input word (EN + 3-bit address) to select channels and supports DIN/DOUT tie-together operation using tri-state control timed to CS falling edge and sixth CLK falling edge - enabling 3-wire isolation-friendly communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - delivers 4096 discrete output levels for high-fidelity sensor digitization. |
| Sampling Rate | 16.8ksps maximum - supports real-time monitoring of fast-changing industrial or biomedical signals. |
| Supply Current | 320μA typ during conversion; drops to 1nA in auto-shutdown - enables multi-year battery life in wireless sensor nodes. |
| Differential Nonlinearity | ±3/4 LSB max - ensures monotonic transfer function critical for closed-loop control feedback paths. |
| Input Span Range | 1.5V to 5V full-scale - allows direct interfacing with low-output transducers without gain amplification. |
| Serial Interface | 4-wire SPI/MICROWIRE/QSPI-compatible - simplifies integration with common microcontrollers and supports 3-wire mode via DIN/DOUT sharing. |
| Analog Input Leakage | ±1μA max at ADCIN - minimizes error in high-impedance sensor circuits such as thermocouples or pH electrodes. |
Pinout & Package
Package: 16-pin narrow SO (SOIC-16), RoHS-compliant, lead-free (#PBF), tape-and-reel (#TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 (Pins 1–4) | Analog multiplexer inputs | Four single-ended analog inputs selectable via 3-bit address; support floating common-mode voltages relative to COM. |
| ADCIN (Pin 5) | ADC positive input | Accepts conditioned signal from MUXOUT or external source; high-impedance node requiring careful layout to avoid noise coupling. |
| VREF (Pin 6) | Reference voltage input | Defines full-scale range; accepts 1.5V–5.05V; internal 5MΩ resistance when CS = VIH, 55kΩ when CS = VIL. |
| COM (Pin 7) | ADC negative input / common-mode reference | Must be low-noise and tied directly to analog ground; sets zero-reference point for unipolar measurements. |
| GND (Pin 8) | Analog ground | Primary return path for analog circuitry; requires dedicated low-impedance connection to system AGND plane. |
| CSADC (Pin 9) | ADC chip select | Active-low enable for ADC conversion; powers down ADC and tristates DOUT when high; used with CSMUX for synchronized operation. |
| VCC (Pins 10, 15, 16) | Power supply | 4.5V–5.5V single supply; multiple pins provided for low-impedance decoupling - each must be bypassed to GND with 1μF ceramic capacitor. |
| MUXOUT (Pin 18) | Multiplexer output | Drives selected channel to ADCIN; forms external loop for PGA or antialias filtering before conversion. |
| DIN (Pin 13) | Serial data input | Receives 4-bit channel address (EN + D2:D0); latched on rising CLK edge; supports 3-wire shared-bus operation. |
| DOUT (Pin 11) | Serial data output | Shifts out 12-bit conversion result LSB-first on falling CLK edges; tri-stated when CSADC is high. |
| CLK (Pins 12, 14) | Serial clock input | 320kHz typical clock frequency; synchronizes both MUX addressing and ADC data transfer; multiple pins for routing flexibility. |
| CSMUX (Pin 19) | Multiplexer chip select | Active-low enable for MUX channel selection; can be controlled independently of CSADC to optimize timing or reduce power. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown to 1nA | Eliminates need for external power gating logic in intermittent-sampling applications like environmental logging. |
| Separate MUXOUT/ADCIN pins | Enables insertion of external gain/filter stages in the signal path - reduces BOM count vs per-channel conditioning. |
| Break-before-make channel switching | Prevents transient short-circuits during channel changes - essential for reliable operation with reactive or high-impedance sources. |
| 3-wire serial interface support | Reduces isolation barrier component count by sharing DIN/DOUT - lowers cost and footprint in medical or industrial isolation designs. |
| 1.5V–5V programmable input span | Allows direct digitization of low-voltage sensors (e.g., RTDs, bridge outputs) without precision op-amp gain stages. |
Applications
| Battery Monitoring | Remote Data Acquisition |
|---|---|
Use Scenario: Monitoring individual cell voltages in multi-cell Li-ion battery packs for state-of-charge estimation and balancing control. IC Role / Device Role / Timing Role: 4-channel ADC sequentially samples cell voltages referenced to pack ground; uses COM pin for differential sensing across series-connected cells. Use Value: 12-bit resolution enables detection of <1mV voltage drift; micropower shutdown extends battery runtime between telemetry transmissions. | Use Scenario: Wireless sensor node collecting temperature, humidity, and pressure data in inaccessible locations (e.g., HVAC ducts, agricultural fields). IC Role / Device Role / Timing Role: ADC digitizes analog sensor outputs; serial interface transmits data through RF isolator to MCU; auto-shutdown minimizes quiescent load. Use Value: 320μA active current and 1nA shutdown allow >5-year operation on coin-cell batteries; SO-16 package fits compact PCB layouts. |
| Pen Screen Digitizing | Temperature Measurement |
Use Scenario: Resistive touch screen controller measuring X/Y electrode voltages to determine stylus position in handheld devices. IC Role / Device Role / Timing Role: 4-channel MUX scans X+ X− Y+ Y− electrodes; ADC converts voltage ratios to coordinate values; SPI interface feeds results to host processor. Use Value: 16.8ksps sampling captures rapid stylus motion; separate MUXOUT/ADCIN allows on-chip averaging or filtering to suppress contact noise. | Use Scenario: Industrial temperature monitoring using thermistor or RTD bridges in PLC analog input modules. IC Role / Device Role / Timing Role: ADC measures bridge output voltage; external reference ensures accuracy; COM pin connects to bridge mid-point for ratiometric rejection of excitation drift. Use Value: ±3/4 LSB DNL guarantees linearity over full temperature range; 1.5V input span accommodates low-excitation bridge outputs without amplification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | 8-channel, 12-bit SAR ADC; 500μA active current; no integrated MUX control logic; SPI-only interface. | Requires external address decoding logic; lacks break-before-make switching; higher power limits battery life. | Select when higher channel count is needed and external logic is acceptable; not drop-in due to different pinout and control scheme. |
| MAX11100ETE+ | 8-channel, 12-bit SAR ADC; 350μA active current; integrated reference; 3-wire SPI compatible; 16-pin TQFN. | Includes internal 2.048V reference; no separate MUX/ADC chip selects; smaller thermal pad package. | Choose for space-constrained designs needing internal reference; requires layout revision due to TQFN vs SO-16 footprint. |
Compared with ADS7816U and MAX11100ETE+, the LTC1594CS#TRPBF offers unique dual-chip-select control for independent MUX/ADC timing, guaranteed ±3/4 LSB DNL, and true 1nA shutdown - making it optimal for ultra-low-power, isolated, or precision ratiometric measurement systems where timing flexibility and minimal quiescent draw are critical.
Availability
LTC1594CS#TRPBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and pen screen digitizing requiring stable component supply and long-term production continuity.
Supply support for LTC1594CS#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, 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 LTC1594CS#TRPBF belongs to ADI's legacy Linear Technology precision data converter product line, engineered specifically for ultra-low-power, high-accuracy sensor interface applications in resource-constrained environments.
FAQ
What is the maximum sampling rate of the LTC1594CS#TRPBF?
The LTC1594CS#TRPBF achieves a maximum sampling rate of 16.8ksps under standard conditions (VCC = 5V, fCLK = 320kHz). When using separate CSMUX/CSADC control and optimized timing, the effective rate can reach 20ksps. This value is guaranteed across the 0°C to 70°C operating temperature range for the LTC1594CS#TRPBF variant.
Does the LTC1594CS#TRPBF support external reference voltage?
Yes, the LTC1594CS#TRPBF supports external reference voltage applied to the VREF pin, with a valid range of 1.5V to VCC + 0.05V (i.e., up to 5.55V at VCC = 5.5V). The device maintains ±3/4 LSB DNL and full 12-bit performance across this range, enabling precise ratiometric or absolute measurements depending on reference stability and source impedance.
Can DIN and DOUT be connected to the same microcontroller pin?
Yes, the LTC1594CS#TRPBF supports 3-wire operation with DIN and DOUT tied together. The device tri-states DOUT after CS goes high and asserts control of the shared line after CS falls and before the sixth falling CLK edge. The MCU must configure the pin as output during address transmission and input during result reception to avoid bus contention - a capability explicitly validated in the LTC1594CS#TRPBF datasheet.
What is the purpose of the COM pin on the LTC1594CS#TRPBF?
The COM pin on the LTC1594CS#TRPBF serves as the negative analog input to the ADC and establishes the common-mode reference for unipolar measurements. It must be connected to a low-noise analog ground or sensor reference point. In ratiometric applications, tying COM to the sensor excitation midpoint rejects common-mode drift - a design feature confirmed in the LTC1594CS#TRPBF application circuits and performance graphs.
Is the LTC1594CS#TRPBF pin-compatible with the LTC1594IS#TRPBF?
Yes, the LTC1594CS#TRPBF and LTC1594IS#TRPBF share identical pinout, package (16-pin SO), and electrical interface. The only difference is the operating temperature range: LTC1594CS#TRPBF is rated for 0°C to 70°C, while LTC1594IS#TRPBF extends to –40°C to 85°C. All timing, DC, and AC specifications are otherwise identical, allowing direct substitution in commercial-grade applications.
LTC1594CS#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:
- -
LTC1594CS#TRPBF FAQ
1.How can I place an order for LTC1594CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1594CS#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 LTC1594CS#TRPBF reliable?
The price and inventory of LTC1594CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1594CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1594CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1594CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1594CS#TRPBF?
LTC1594CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1594CS#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 LTC1594CS#TRPBF?
For technical support, including LTC1594CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1594CS#TRPBF requirements.
6.How does Aetrix verify that LTC1594CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1594CS#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 LTC1594CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1594CS#TRPBF?
All LTC1594CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1594CS#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 LTC1594CS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1594CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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