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Analog Devices Inc. LTC1598LCG#PBF
- Part No.:
- LTC1598LCG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1598LCG#PBF.pdf
- Description:
- IC ADC 12BIT SAR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,543
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Product details
Overview
LTC1598LCG#PBF from Analog Devices (formerly Linear Technology) is an 8-channel, 12-bit, micropower sampling ADC with integrated multiplexer and serial interface. It operates from a 2.7V–3.6V supply, draws only 160µA typical during conversion at 10.5ksps, and auto-shuts down to 1nA between conversions. It features separate MUXOUT/ADCIN pins for external signal conditioning and supports ratiometric or external reference operation - ideal for battery-powered remote data acquisition systems.
For engineers reviewing the LTC1598LCG#PBF datasheet, LTC1598LCG#PBF pinout, LTC1598LCG#PBF application, or LTC1598LCG#PBF equivalent, key selection criteria include guaranteed ±3/4 LSB DNL, 24-pin SSOP package with verified 8-channel analog input mapping, SPI/MICROWIRE-compatible 4-wire serial interface timing, and validated 1.5V–3V full-scale input span capability without gain stages.
Technical Context
The LTC1598LCG#PBF integrates an 8-channel analog multiplexer, a 12-bit switched-capacitor successive-approximation ADC, and a sample-and-hold circuit - all operating from a single 3V supply. Its dual chip-select architecture (CSMUX and CSADC) enables independent control of multiplexer channel selection and ADC conversion initiation, supporting flexible sequencing and up to 20ksps burst sampling when used separately.
It uses a half-duplex, synchronous 4-wire serial interface with clock-synchronized data transfer on falling CLK edges. The device supports DIN/DOUT tie-together operation using tri-state control, reducing interconnect count to three wires (CS, CLK, DATA), and includes break-before-make switching (tOPEN = 125–350ns) to prevent channel crosstalk during multiplexer transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - ensures monotonic transfer function and unambiguous digital output across full scale. |
| Sampling Rate | 10.5ksps maximum - supports real-time monitoring of fast-changing sensor signals in portable instrumentation. |
| Supply Current | 160µA typ at 10.5ksps; drops linearly with sample rate - enables multi-year battery life in low-duty-cycle sensing nodes. |
| Differential Nonlinearity | ±3/4 LSB max - guarantees monotonicity and eliminates code ambiguities critical for closed-loop control feedback. |
| Analog Input Span | Configurable down to 1.5V full scale - allows direct connection to low-output sensors (e.g., thermocouples, RTDs) without external amplification. |
| Reference Input Range | 1.5V to VCC + 0.05V - supports internal or external references, including ratiometric configurations tied to same supply as sensor bridge. |
| Serial Interface | Compatible with SPI, QSPI, and MICROWIRE protocols - simplifies integration with common microcontrollers without custom driver development. |
Pinout & Package
The LTC1598LCG#PBF is housed in a 24-pin plastic SSOP (Small Outline Plastic Package) with 0.635mm lead pitch, rated for 0°C to 70°C operation (C-grade). Thermal resistance θJA = 120°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 20–24, 1–3) | Analog multiplexer inputs | Eight independent high-impedance (±200nA leakage) analog inputs selectable via 3-bit address; support ±0.05V beyond supply rails. |
| MUXOUT (Pin 18) | Multiplexer output node | Provides buffered analog output of selected channel; directly connects to ADCIN to form configurable signal-conditioning loop. |
| ADCIN (Pin 17) | ADC positive input | Accepts conditioned signal from MUXOUT or external source; 1µA max input leakage enables high-Z sensor interfacing. |
| COM (Pin 8) | ADC negative input / common-mode reference | Serves as differential reference point for all channels; must be low-noise and tied to clean analog ground or sensor return. |
| VREF (Pin 16) | Reference voltage input | Defines ADC full-scale range; accepts 1.5V–3.65V; input impedance >2.7MΩ when CS high, enabling low-power reference sourcing. |
| CSMUX / CSADC (Pins 6, 13, 10) | Independent chip select inputs | Enable asynchronous control: CSMUX selects channel before CSADC triggers conversion - essential for maximizing throughput in burst mode. |
| CLK (Pins 5, 12, 14) | Serial interface clock | Drives both MUX addressing and ADC data shift-out; supports up to 200kHz; minimum frequency defined by temperature-dependent acquisition requirements. |
| DIN / DOUT (Pins 7, 11) | Half-duplex serial data I/O | Supports 3-wire operation when tied together; DOUT goes Hi-Z when CS high, preventing bus contention in shared-data-line configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Separate MUX and ADC controls | Enables channel selection once followed by multiple conversions - reduces overhead and increases effective sample rate to 20ksps. |
| MUXOUT/ADCIN loop | Allows insertion of external PGA or anti-alias filter between multiplexer and ADC - eliminates per-channel signal conditioning hardware. |
| Auto shutdown between conversions | Reduces average current to ~1nA during idle periods - extends battery life in duty-cycled IoT sensor nodes. |
| Ratiometric operation support | Permits use of same supply for sensor excitation and ADC reference - cancels supply drift effects in bridge-based measurements. |
| Break-before-make multiplexer switching | Guarantees 125–350ns isolation between channel disconnect and reconnect - prevents transient coupling and measurement corruption. |
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: 8-channel ADC sequentially samples each cell's voltage referenced to pack ground, with COM tied to system ground and VREF derived from precision bandgap. Use Value: Eliminates need for external multiplexers and op-amp buffers; 160µA active current and 1nA shutdown enable long-term logging without compromising runtime. | Use Scenario: Environmental sensor node deployed in inaccessible locations (e.g., agricultural field, pipeline monitoring) powered by coin cell or energy harvester. IC Role / Device Role / Timing Role: LTC1598LCG#PBF digitizes temperature, humidity, and pressure sensor outputs at low duty cycle, then transmits via low-power radio after conversion. Use Value: Micropower operation and 3-wire serial interface reduce PCB area and BOM cost while maintaining 12-bit resolution for calibrated sensor accuracy. |
| Isolated Data Acquisition | Temperature Measurement |
Use Scenario: High-voltage industrial motor controller measuring phase currents and winding temperatures across galvanic isolation barrier. IC Role / Device Role / Timing Role: LTC1598LCG#PBF resides on isolated side, digitizing analog signals pre-isolation; serial data transmitted through optocoupler or digital isolator to host MCU. Use Value: Low power and 3-wire interface minimize isolator channel count and power draw on isolated side - critical for compact isolated power budgets. | Use Scenario: Precision temperature monitoring in medical diagnostic equipment using multiple RTD or thermistor sensors. IC Role / Device Role / Timing Role: LTC1598LCG#PBF interfaces directly to 2-, 3-, or 4-wire RTDs with programmable excitation current sources external to the IC, using COM as Kelvin sense return. Use Value: 1.5V full-scale span and ±3/4 LSB DNL ensure sub-0.1°C resolution over wide temperature ranges without calibration-intensive gain stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel, 12-bit, micropower ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-channel, 12-bit, 200ksps SAR ADC; 2.7–5.25V supply; SPI-only interface; no separate MUX/ADC controls. | Higher speed but higher power (1.2mA active); lacks MUXOUT/ADCIN loop and break-before-make switching. | Select when sampling rate >10ksps is required and power budget allows >7× higher active current. |
| MAX11131ETE+ | 8-channel, 12-bit, 100ksps SAR ADC; 2.7–3.6V supply; SPI/MICROWIRE compatible; integrated reference. | Includes internal 2.048V reference; no external VREF flexibility; no MUXOUT/ADCIN loop; fixed 8-channel routing. | Select when board space is constrained and external reference sourcing is undesirable - trades configurability for integration. |
Compared with ADS7822U and MAX11131ETE+, the LTC1598LCG#PBF uniquely combines ultra-low 160µA active current, independent MUX/ADC control for burst sampling, and the MUXOUT/ADCIN loop for external signal conditioning - making it optimal for energy-constrained, multi-sensor systems requiring design flexibility and long service life.
Availability
LTC1598LCG#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated data acquisition requiring stable component supply and long-term manufacturability.
Supply support for LTC1598LCG#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1598LCG#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered specifically for ultra-low-power, multi-channel sensor interfacing in portable and remote instrumentation where resolution, accuracy, and energy efficiency are co-prioritized.
FAQ
What is the operating temperature range for the LTC1598LCG#PBF?
The LTC1598LCG#PBF is specified for operation from 0°C to 70°C (Commercial grade). Its absolute maximum junction temperature is 125°C, and thermal resistance θJA is 120°C/W in the 24-pin SSOP package. For extended temperature applications, the LTC1598LIG variant supports –40°C to +85°C.
Does the LTC1598LCG#PBF require an external reference voltage?
No - the LTC1598LCG#PBF supports both external reference operation (via VREF pin, 1.5V to VCC + 0.05V) and ratiometric configurations where the same supply powers both the sensor and the reference input. It does not include an internal reference; external sourcing is mandatory for accurate conversion.
Can the LTC1598LCG#PBF operate from a 2.7V supply?
Yes - the LTC1598LCG#PBF is fully specified for operation from 2.7V to 3.6V. At 2.7V, it maintains 12-bit resolution, ±3/4 LSB DNL, and 10.5ksps sampling rate with 160µA typical supply current, meeting all recommended operating conditions per the datasheet.
How does the MUXOUT/ADCIN loop improve system design with the LTC1598LCG#PBF?
The MUXOUT/ADCIN loop in the LTC1598LCG#PBF allows insertion of external circuitry - such as a programmable-gain amplifier or anti-alias filter - between the multiplexer output and ADC input. This eliminates the need for per-channel signal conditioning, reduces component count, and enables flexible analog front-end configuration without redesigning the core ADC interface.
Is the LTC1598LCG#PBF pin-compatible with the LTC1594L series?
No - the LTC1598LCG#PBF uses a 24-pin SSOP package with distinct pin assignments (e.g., CH4–CH7, dual CLK/CS pins), while the LTC1594L is in a 16-pin SO package with only four analog inputs. They share functional architecture but differ in channel count, pinout, and package - not pin-compatible or drop-in replacements.
LTC1598LCG#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1598LCG#PBF FAQ
1.How can I place an order for LTC1598LCG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1598LCG#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 LTC1598LCG#PBF reliable?
The price and inventory of LTC1598LCG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1598LCG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1598LCG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1598LCG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1598LCG#PBF?
LTC1598LCG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1598LCG#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 LTC1598LCG#PBF?
For technical support, including LTC1598LCG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1598LCG#PBF requirements.
6.How does Aetrix verify that LTC1598LCG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1598LCG#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 LTC1598LCG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1598LCG#PBF?
All LTC1598LCG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1598LCG#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 LTC1598LCG#PBF part is unused and in its original packaging.
Return procedure for LTC1598LCG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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