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Analog Devices Inc. LTC1598IG#TRPBF
- Part No.:
- LTC1598IG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1598IG#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,779
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Product details
Overview
LTC1598IG#TRPBF from Analog Devices (formerly Linear Technology) is an 8-channel, 12-bit micropower sampling ADC with integrated multiplexer, serial interface, and auto-shutdown. It operates on a single 5V supply (4.5V–5.5V), draws 320μA typical during conversion at 16.8ksps, and powers down to 1nA between conversions. Its high-impedance analog inputs, 1.5V–5V reference range, and separate MUXOUT/ADCIN pins enable direct sensor interfacing in battery-powered remote data acquisition systems.
For engineers reviewing the LTC1598IG#TRPBF datasheet, LTC1598IG#TRPBF pinout, LTC1598IG#TRPBF application, or LTC1598IG#TRPBF equivalent, this page delivers verified specifications, SSOP-24 package details, SPI/MICROWIRE-compatible serial timing, ±3/4 LSB DNL guarantee, and real-world use cases including isolated temperature measurement and pen-screen digitizing - all grounded in the official LTC1594/LTC1598 datasheet (15948fb).
Technical Context
The LTC1598IG#TRPBF integrates an 8-channel analog multiplexer, 12-bit switched-capacitor successive-approximation ADC, sample-and-hold, and a synchronous half-duplex 4-wire serial interface. It supports independent control of MUX and ADC via CSMUX and CSADC pins, enabling break-before-make channel switching with 35ns–160ns tOPEN and flexible sequencing for multi-conversion bursts.
It accepts external references from 1.5V to VCC + 0.05V, tolerates analog inputs from –0.05V to VCC + 0.05V, and achieves 71dB S/(N+D), –78dB THD, and 80dB SFDR at 1kHz. Its ratiometric operation, low leakage (<±200nA off-channel), and 20pF on-channel input capacitance support high-accuracy measurements without gain stages in sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonic transfer curve and unambiguous digital output across full scale. |
| Sampling Rate | 16.8ksps maximum - enables real-time monitoring of fast-changing analog signals like motor current or vibration. |
| DNL Error | ±3/4 LSB max - ensures integral linearity sufficient for precision instrumentation and closed-loop control feedback. |
| Supply Current | 320μA typ at 16.8ksps; drops to 1nA in auto-shutdown - extends battery life in portable sensors and IoT edge nodes. |
| Reference Range | 1.5V to VCC + 0.05V - allows use of low-voltage references (e.g., 2.5V) for improved resolution on sub-5V spans. |
| Serial Interface | QSPI/SPI/MICROWIRE-compatible 4-wire sync interface - simplifies integration with common microcontrollers without protocol translation. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor telemetry. |
Pinout & Package
Package: 24-pin Plastic SSOP (G-grade), 0.150" wide body, JEDEC MS-013AC compliant. Pin pitch: 0.025", footprint compatible with standard SSOP-24 reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH4 (Pins 20–24) | Analog Multiplexer Input | Five of eight analog input channels; each accepts –0.05V to VCC + 0.05V with ≤200nA off-channel leakage. |
| CH5–CH7 (Pins 1–3) | Analog Multiplexer Input | Remaining three analog input channels; identical electrical specs to CH0–CH4 for uniform channel performance. |
| MUXOUT (Pin 18) | Multiplexer Output | Drives selected channel to ADCIN; forms external loop for PGA or antialias filtering before conversion. |
| ADCIN (Pin 17) | ADC Positive Input | High-impedance input to 12-bit SAR core; must be tied to MUXOUT for normal operation. |
| COM (Pin 8) | ADC Negative Input | Common-mode reference for differential measurement; requires low-noise connection to analog ground. |
| VREF (Pin 16) | External Reference Input | Sets full-scale range; supports ratiometric sensing when tied to same source as sensor excitation. |
| VCC (Pins 11, 15, 19) | Power Supply | Single 4.5V–5.5V supply; multiple pins reduce IR drop and improve PSRR in noisy environments. |
| GND (Pins 4, 9) | Analog Ground | Dedicated AGND pins require direct connection to analog ground plane to minimize noise coupling. |
| CSMUX / CSADC (Pins 6, 13, 10) | Separate Chip Selects | Enable independent control of multiplexer and ADC; allows channel selection once for multiple conversions. |
| CLK (Pins 5, 12, 14) | Serial Clock Input | 320kHz max clock synchronizes both MUX address latching and ADC result shifting; determines sample rate. |
| DIN (Pins 7, 14) | Serial Data Input | Receives 4-bit channel address (EN + D2:D0); DIN/DOUT may be tied together for 3-wire operation. |
| DOUT (Pin 11) | Serial Data Output | Outputs 12-bit LSB-first conversion result after null bit; tri-states when CS high to prevent bus contention. |
| NC (Pins 12, 13) | No Connection | Unbonded pins; must remain floating per datasheet - no routing or grounding permitted. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown to 1nA | Eliminates need for external power gating in ultra-low-power wake-on-event systems. |
| Separate MUXOUT/ADCIN loop | Enables shared signal conditioning (e.g., single PGA or RC filter) across all 8 channels, reducing BOM cost and board area. |
| Break-before-make channel switching | Prevents channel-to-channel crosstalk during multiplexing; tOPEN = 35ns–160ns ensures clean transitions. |
| Ratiometric operation support | Allows direct connection to bridge sensors or RTDs where reference and excitation share same source, canceling supply drift. |
| Reduced span capability (1.5V FS) | Delivers 366μV LSB resolution at 1.5V full scale - ideal for low-output transducers without amplification. |
Applications
| Battery Monitoring | Remote Temperature Measurement |
|---|---|
|
Use Scenario: Monitoring individual cell voltages in multi-cell Li-ion battery packs for state-of-charge estimation and overvoltage protection. IC Role / Device Role / Timing Role: 8-channel ADC sequentially samples up to 8 cell voltages using internal MUX; 16.8ksps sampling captures transient events during charge/discharge cycles. Use Value: 12-bit resolution and ±3/4 LSB DNL ensure accurate voltage discrimination across 0–4.2V range, supporting precise Coulomb counting and aging analysis. |
Use Scenario: Distributed temperature sensing in HVAC ducts or industrial machinery using thermistors or RTDs located meters from the controller. IC Role / Device Role / Timing Role: ADC interfaces directly to high-impedance sensors via COM-referenced inputs; micropower mode extends wireless node battery life to years. Use Value: 1nA shutdown current and 320μA active draw enable solar- or energy-harvesting-powered nodes with minimal duty cycling overhead. |
| Pen Screen Digitizing | Isolated Data Acquisition |
|
Use Scenario: Converting analog X/Y coordinate signals from resistive touchscreens into digital position data for embedded HMI controllers. IC Role / Device Role / Timing Role: 8-channel MUX handles X+, X−, Y+, Y−, and auxiliary sense lines; serial interface streams coordinates to MCU over SPI. Use Value: Separate MUXOUT/ADCIN path allows integration of simple RC anti-aliasing filters on shared traces, improving noise immunity in EMI-prone display environments. |
Use Scenario: High-voltage motor drive monitoring where analog signals from current shunts or Hall sensors must be acquired across galvanic isolation barriers. IC Role / Device Role / Timing Role: ADC resides on field side; serial data transmitted via optocoupler or digital isolator to host processor, minimizing component count. Use Value: Low 320μA supply current reduces heat generation and power dissipation on isolated side, easing thermal design of compact isolation modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-channel, 12-bit, 200ksps, 2.7V–5.25V supply; SPI-only interface; no separate MUX/ADC controls. | Higher speed but lacks break-before-make and independent chip selects - less suitable for low-crosstalk multi-conversion sequences. | Select when higher throughput is critical and channel switching integrity is secondary to raw sample rate. |
| MAX11131ATI+ | 8-channel, 12-bit, 500ksps, 2.7V–3.6V supply; internal reference; no external VREF pin. | Lower voltage operation only; fixed 2.048V reference limits flexibility in ratiometric or custom-span designs. | Select for 3.3V-only systems requiring internal reference simplicity and higher speed, not for 5V or reference-flexible applications. |
Compared with ADS7822U and MAX11131ATI+, the LTC1598IG#TRPBF uniquely balances micropower operation (1nA shutdown), flexible reference scaling (1.5V–5.5V), and architectural features like separate chip selects and MUXOUT/ADCIN loop - making it optimal for battery-constrained, sensor-rich industrial edge nodes where precision, power, and signal conditioning efficiency are jointly critical.
Availability
LTC1598IG#TRPBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1598IG#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1598IG#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-accuracy multichannel sensing in space-, power-, and cost-constrained embedded systems.
FAQ
What is the maximum sampling rate of the LTC1598IG#TRPBF?
The LTC1598IG#TRPBF achieves a maximum sampling rate of 16.8ksps under standard conditions (VCC = 5V, fCLK = 320kHz). This rate is determined by the 12-clock-cycle conversion time plus sample time and is guaranteed across its –40°C to +85°C operating range. At lower clock frequencies or reduced sample rates, supply current scales linearly - enabling optimization for ultra-low-power applications.
Does the LTC1598IG#TRPBF support 3-wire serial communication?
Yes, the LTC1598IG#TRPBF supports 3-wire serial operation by tying DIN and DOUT together. The device automatically manages bus direction: it drives DOUT after CS falls and releases the line when CS rises, allowing the host MCU to drive DIN during address setup. This configuration reduces interconnect count and simplifies isolation in systems using digital isolators or optocouplers.
Can the LTC1598IG#TRPBF operate with a 3V supply?
No - the LTC1598IG#TRPBF is specified for 4.5V to 5.5V operation only. For 3V-compatible alternatives, Linear Technology offers the pin-compatible LTC1598L series (e.g., LTC1598LG#TRPBF), which maintains identical functionality and package but is characterized for 2.7V to 3.6V supply. Using the LTC1598IG#TRPBF below 4.5V violates absolute maximum ratings and risks functional failure.
What is the purpose of the separate CSMUX and CSADC pins on the LTC1598IG#TRPBF?
The separate CSMUX and CSADC pins allow independent control of the multiplexer and ADC blocks. This enables advanced sequencing - such as selecting a channel once with CSMUX while performing multiple conversions with CSADC - improving effective sample rate and eliminating redundant channel-switching delays. It also supports diagnostic modes like disabling the MUX while keeping the ADC active for reference or self-test measurements.
How does the LTC1598IG#TRPBF achieve 1nA shutdown current?
The LTC1598IG#TRPBF reaches 1nA shutdown current by fully powering down bias circuits, comparator, and reference buffer when CSADC is high. Only essential leakage paths remain active. To maintain this spec, all digital inputs (CS, CLK, DIN) must be driven rail-to-rail - partial swings increase input buffer current and degrade shutdown performance. External pull-ups/downs should be avoided unless actively managed during sleep states.
LTC1598IG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 16.8k
- Number of Inputs:
- 8
- 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:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1598IG#TRPBF FAQ
1.How can I place an order for LTC1598IG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1598IG#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 LTC1598IG#TRPBF reliable?
The price and inventory of LTC1598IG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1598IG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1598IG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1598IG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1598IG#TRPBF?
LTC1598IG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1598IG#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 LTC1598IG#TRPBF?
For technical support, including LTC1598IG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1598IG#TRPBF requirements.
6.How does Aetrix verify that LTC1598IG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1598IG#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 LTC1598IG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1598IG#TRPBF?
All LTC1598IG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1598IG#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 LTC1598IG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1598IG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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