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Analog Devices Inc. LTC1598IG#PBF
- Part No.:
- LTC1598IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1598IG#PBF.pdf
- Description:
- IC ADC 12BIT SAR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,291
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Product details
Overview
LTC1598IG#PBF 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, 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#PBF datasheet, LTC1598IG#PBF pinout, LTC1598IG#PBF application, or LTC1598IG#PBF equivalent, key selection criteria include guaranteed ±3/4 LSB DNL, SPI/MICROWIRE/QSPI-compatible 4-wire serial interface, 24-pin SSOP package with –40°C to +85°C industrial temperature rating, and ratiometric operation capability with external reference.
Technical Context
The LTC1598IG#PBF integrates an 8-channel analog multiplexer, 12-bit switched-capacitor successive-approximation ADC, sample-and-hold, and synchronous serial interface - all operating from a single 4.5V–5.5V supply. Its dual chip select architecture (CSMUX and CSADC) enables independent control of multiplexer channel selection and ADC conversion timing.
It supports break-before-make switching with tOPEN = 35–160ns, achieves 71dB SNR and 80dB SFDR at 1kHz input, and maintains ±3/4 LSB DNL across its full industrial temperature range. The MUXOUT/ADCIN loop allows external signal conditioning such as programmable gain amplification prior to digitization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - ensures monotonic transfer function for precision measurement. |
| Sampling Rate | 16.8ksps maximum - supports real-time monitoring of fast-changing sensor signals. |
| Differential Nonlinearity | ±3/4 LSB max - guarantees monotonicity and minimizes code-dependent measurement error. |
| Supply Current (Active) | 320μA typical at 16.8ksps - enables multi-year battery life in portable instrumentation. |
| Supply Current (Shutdown) | 1nA typical - eliminates standby power drain in intermittently active systems. |
| Reference Input Range | 1.5V to VCC + 0.05V - permits use of low-voltage references or ratiometric sensor bridges. |
| Analog Input Range | –0.05V to VCC + 0.05V - accommodates small negative offsets without level-shifting circuitry. |
Pinout & Package
The LTC1598IG#PBF is housed in a 24-pin plastic SSOP (G package) with 0.635mm lead pitch and exposed pad thermal enhancement. Pin assignments are validated per Linear Technology datasheet 15948fb.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH4 (Pins 20–24) | Analog multiplexer inputs | Five of eight channels; CH5–CH7 on Pins 1–3 - supports multi-sensor polling without external mux. |
| MUXOUT (Pin 18) | Multiplexer output | Drives ADCIN directly; forms flexible external loop for PGA or antialias filtering before conversion. |
| ADCIN (Pin 17) | ADC positive analog input | Accepts conditioned signal from MUXOUT; high-impedance input reduces loading on external circuitry. |
| COM (Pin 8) | ADC negative analog input | Common-mode reference point; must be low-noise and tied to clean analog ground plane. |
| VREF (Pin 16) | External reference input | Defines full-scale range; supports ratiometric operation when tied to sensor excitation source. |
| CSMUX / CSADC (Pins 6,13) | Independent chip selects | Enable separate control of mux addressing and ADC conversion - increases effective throughput to 20ksps. |
| DIN / DOUT (Pins 7,10) | Half-duplex serial I/O | Supports 3-wire operation when tied together; compatible with SPI, QSPI, and MICROWIRE protocols. |
| CLK (Pins 5,12,14) | Serial clock input | Three bonded CLK pins reduce trace inductance; synchronizes both mux address latching and ADC result shifting. |
| VCC (Pins 11,15,19) | Power supply | Three dedicated VCC pins improve PSRR and reduce supply noise coupling into analog section. |
| GND (Pins 4,9) | Analog ground | Two isolated GND pins require direct connection to analog ground plane to minimize noise injection. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown to 1nA | Eliminates need for external power gating circuitry in duty-cycled systems. |
| Separate MUX and ADC controls | Enables channel selection once followed by multiple conversions - improves effective sampling rate. |
| Break-before-make switching | Prevents channel crosstalk during multiplexer transitions - critical for high-accuracy multi-sensor systems. |
| High-impedance analog inputs | Reduces loading on high-output-impedance sensors (e.g., thermistors, RTDs) without buffer amplifiers. |
| Reduced span operation (1.5V FS) | Delivers 366μV resolution at lower reference voltages - optimizes dynamic range for low-level signals. |
Applications
| Battery Monitoring | Remote Data Acquisition |
|---|---|
Use Scenario: Measuring individual cell voltages in multi-cell Li-ion battery packs under varying load conditions. IC Role / Device Role / Timing Role: 8-channel ADC samples up to eight cell voltages sequentially using internal MUX; auto-shutdown minimizes quiescent current between readings. Use Value: Enables accurate state-of-charge estimation with <1mV offset error and no external gain stages required due to 1.5V–5V reference flexibility. | Use Scenario: Collecting environmental sensor data (temperature, humidity, pressure) in unpowered field nodes powered by energy harvesting. IC Role / Device Role / Timing Role: Micropower ADC digitizes analog sensor outputs and transmits results via isolation barrier using 3-wire serial interface. Use Value: 1nA shutdown current extends operational lifetime of energy-constrained nodes; SPI compatibility simplifies integration with isolated microcontrollers. |
| Isolated Data Acquisition | Temperature Measurement |
Use Scenario: Digitizing analog signals across galvanic isolation barriers in industrial PLC I/O modules. IC Role / Device Role / Timing Role: ADC resides on field side; serial interface drives optocoupler or digital isolator with minimal timing skew due to synchronous clocking. Use Value: Low 320μA active current reduces heat generation on isolated side; separate CSMUX/CSADC pins simplify timing coordination across isolation boundary. | Use Scenario: High-precision RTD or thermistor measurements in medical diagnostic equipment requiring stable long-term accuracy. IC Role / Device Role / Timing Role: Converts differential sensor outputs referenced to COM pin; uses external 4.096V reference for 1mV/LSB resolution. Use Value: Guaranteed ±3/4 LSB DNL ensures linearity over full temperature range; high-impedance inputs prevent RTD self-heating errors. |
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 |
|---|---|---|---|
| ADS8320IDR | 16-bit resolution, 100ksps, SPI-only interface, no integrated MUX, 2.7–5.25V supply | Higher resolution but requires external multiplexer and consumes >1mA active current | Select when absolute precision outweighs power budget constraints and external MUX is acceptable. |
| MAX11131ETE+ | 12-bit, 500ksps, internal 2.048V reference, 10-channel MUX, 2.7–3.6V supply only | Higher speed and more channels but incompatible 3.3V-only supply and fixed reference limit ratiometric flexibility | Select for high-speed, low-voltage battery systems where external reference is not needed and 5V operation is unavailable. |
Compared with ADS8320IDR and MAX11131ETE+, the LTC1598IG#PBF uniquely balances ultra-low power (1nA shutdown), integrated 8-channel MUX, 5V operation, and ratiometric capability - making it optimal for long-life, sensor-rich, isolated, or battery-operated industrial measurement nodes.
Availability
LTC1598IG#PBF is available at Aetrix Electronics and suitable for battery monitoring, remote data acquisition, and isolated industrial sensing applications requiring stable component supply, extended temperature support, and long-term obsolescence management.
Supply support for LTC1598IG#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 LTC1598IG#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-accuracy multichannel sensing in harsh or energy-constrained environments.
FAQ
What is the operating temperature range of the LTC1598IG#PBF?
The LTC1598IG#PBF is rated for –40°C to +85°C operation, as indicated by the "IG" suffix in its part number. This industrial-grade temperature range is validated across all electrical specifications including DNL, offset error, and supply current, ensuring reliable performance in demanding embedded environments without derating.
Does the LTC1598IG#PBF require an external reference voltage?
No - the LTC1598IG#PBF supports both external reference operation (via VREF pin) and ratiometric configurations where VREF is tied to the same source as the sensor excitation. Its reference input accepts 1.5V to VCC + 0.05V, enabling direct use of common precision references like 2.5V or 4.096V without level-shifting.
Can the LTC1598IG#PBF operate with a 3V supply?
No - the LTC1598IG#PBF is specified for 4.5V to 5.5V operation only. For 3V-compatible alternatives, Linear Technology offers the LTC1598L variant (not LTC1598IG#PBF), which has different absolute maximum ratings, timing parameters, and supply current behavior.
How does the break-before-make interval benefit system design with the LTC1598IG#PBF?
The LTC1598IG#PBF guarantees a 35–160ns break-before-make interval (tOPEN) during channel switching. This prevents momentary shorting between channels, eliminating crosstalk-induced measurement errors in high-impedance sensor arrays - especially critical when measuring thermocouples or pH electrodes sharing a common return path.
Is the LTC1598IG#PBF pin-compatible with the LTC1594 series?
No - the LTC1598IG#PBF uses a 24-pin SSOP package while the LTC1594 series uses a 16-pin SO package. Their pinouts differ significantly: LTC1598IG#PBF includes CH4–CH7, three VCC pins, dual CLK and CSMUX pins, and separate DIN/DOUT, whereas LTC1594 has only CH0–CH3 and consolidated control signals. PCB layout is not interchangeable.
LTC1598IG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC1598IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1598IG#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 LTC1598IG#PBF reliable?
The price and inventory of LTC1598IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1598IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1598IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1598IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1598IG#PBF?
LTC1598IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1598IG#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 LTC1598IG#PBF?
For technical support, including LTC1598IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1598IG#PBF requirements.
6.How does Aetrix verify that LTC1598IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1598IG#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 LTC1598IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1598IG#PBF?
All LTC1598IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1598IG#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 LTC1598IG#PBF part is unused and in its original packaging.
Return procedure for LTC1598IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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