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Analog Devices Inc. LTC1598CG#PBF
- Part No.:
- LTC1598CG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1598CG#PBF.pdf
- Description:
- IC ADC 12BIT SAR 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:808
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Product details
Overview
LTC1598CG#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 active current and shuts down to 1nA between conversions, and supports 16.8ksps sampling rate. It is used in battery-operated remote data acquisition systems where low power, multi-sensor monitoring, and isolation-compatible serial communication are required.
For engineers reviewing the LTC1598CG#PBF datasheet, LTC1598CG#PBF pinout, LTC1598CG#PBF application, or LTC1598CG#PBF equivalent, key selection criteria include guaranteed ±3/4 LSB DNL, 8-channel MUX with separate control, SPI/MICROWIRE-compatible 4-wire serial interface, 1.5V–5V reference input range, and SSOP-24 package compatibility with isolated signal chains.
Technical Context
The LTC1598CG#PBF integrates an 8-channel analog multiplexer, a 12-bit switched-capacitor successive-approximation ADC, and a sample-and-hold circuit - all controlled via independent CSMUX and CSADC pins. Its architecture enables break-before-make channel switching (tOPEN = 35–160 ns) and supports ratiometric operation with external reference voltages as low as 1.5V full-scale.
It features dual serial control paths: DIN accepts 4-bit channel address words (EN + D2:D0), while DOUT outputs 12-bit LSB-first conversion results after one null bit. The device maintains high-impedance analog inputs (±1 μA leakage at ADCIN) and supports direct sensor interfacing without gain stages across its 0V to VCC+0.05V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit, no missing codes - ensures monotonic transfer function for precision measurement. |
| Differential Nonlinearity | ±3/4 LSB max - guarantees monotonicity and supports accurate linear interpolation. |
| Sampling Rate | 16.8 ksps - enables real-time monitoring of up to 8 channels at ≥2.1 kSPS per channel. |
| Supply Current (Active) | 320 μA typ at 5V - allows >1-year battery life in 100-ms periodic wake-up sensing nodes. |
| Supply Current (Shutdown) | 1 nA typ - eliminates standby drain in energy-harvesting or ultra-low-power sleep modes. |
| Reference Input Range | 1.5 V to VCC + 0.05 V - permits use of low-voltage references (e.g., 1.5V, 2.5V, 4.096V) for improved resolution scaling. |
| Serial Interface | 4-wire SPI/MICROWIRE compatible - enables direct connection to microcontrollers without level shifters or protocol translation. |
Pinout & Package
Package: 24-pin Plastic SSOP (G package), 0.150" wide body, JEDEC MS-013AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH4 (Pins 20–24) | Analog multiplexer inputs | Accepts 0V to VCC+0.05V signals; ±200 nA off-channel leakage preserves channel isolation. |
| CH5–CH7 (Pins 1–3) | Analog multiplexer inputs | Completes 8-channel set; identical electrical specs to CH0–CH4 for uniform system design. |
| MUXOUT (Pin 18) | Multiplexer output node | Drives ADCIN directly; enables external signal conditioning (e.g., PGA, antialias filter) in MUXOUT→ADCIN loop. |
| ADCIN (Pin 17) | ADC positive input | High-impedance (±1 μA leakage); must be tied to MUXOUT for standard operation or to external signal path. |
| COM (Pin 8) | ADC negative input / common-mode reference | Requires low-noise analog ground connection; defines differential input range relative to selected channel. |
| VREF (Pin 16) | External reference voltage input | Defines full-scale span; supports 1.5V–5.05V range; internal 5 MΩ resistance when CS = VIH aids low-power reference buffering. |
| CSMUX (Pins 6, 13) | Multiplexer chip select | Controls MUX address latching and channel enable; may be driven independently from CSADC for optimized timing. |
| CSADC (Pin 10) | ADC chip select | Enables sampling/conversion when low; powers down ADC and tristates DOUT when high. |
| CLK (Pins 5, 12, 14) | Serial clock input | Synchronizes both MUX addressing and ADC data transfer; 320 kHz typical for 16.8 ksps operation. |
| DIN (Pins 7, 14) | Serial data input | Accepts 4-bit channel address (EN + D2:D0); DIN/DOUT may be tied for 3-wire interface. |
| DOUT (Pin 11) | Serial data output | Outputs 12-bit LSB-first conversion result after one null bit; Hi-Z when CSADC = high. |
| VCC (Pins 11, 15, 19) | Power supply | 4.5V–5.5V operation; requires local 1 μF bypass to GND (Pin 4 or 9) for noise immunity. |
| GND (Pins 4, 9) | Analog ground | Must connect directly to low-impedance analog ground plane; separates noise-sensitive analog and digital domains. |
| NC (Pins 12, 13) | No connection | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Separate MUX and ADC control | Independent CSMUX/CSADC pins allow channel selection once followed by multiple conversions - increases effective throughput to 20 ksps. |
| MUXOUT/ADCIN loop | Enables shared external signal conditioning (e.g., single PGA or RC filter) across all 8 channels - reduces BOM cost and PCB area. |
| Ratiometric operation support | Accepts reference voltages from 1.5V to 5.05V - permits direct use of sensor-supply rails or low-dropout references for improved system accuracy. |
| Break-before-make switching | tOPEN = 35–160 ns ensures no channel shorting during multiplexer transitions - critical for high-impedance sensor sources. |
| 3-wire serial option | DIN/DOUT can be tied together with tri-state MCU I/O - reduces interconnect count in space-constrained or isolated designs. |
Applications
| Battery Monitoring | Remote Industrial Sensor Node |
|---|---|
|
Use Scenario: Monitoring voltage levels across 6–8 series-connected Li-ion cells in portable medical devices or UPS systems. IC Role / Device Role / Timing Role: 8-channel ADC samples cell voltages sequentially using internal MUX; auto-shutdown minimizes quiescent drain between readings. Use Value: 12-bit resolution provides ≤1.22 mV LSB at 5V reference, enabling precise state-of-charge estimation without external amplifiers. |
Use Scenario: Collecting temperature, pressure, and humidity data from distributed sensors in oil/gas field telemetry units powered by solar + supercapacitor. IC Role / Device Role / Timing Role: Acts as front-end digitizer with SPI interface to isolated microcontroller; 1nA shutdown current extends offline survival time. Use Value: 320 μA active current at 16.8 ksps allows continuous logging at 10 Hz per channel while maintaining >2-year battery life. |
| Isolated Data Acquisition | Pen Screen Digitizing |
|
Use Scenario: High-voltage motor drive feedback system requiring galvanic isolation between phase current/voltage sensors and controller. IC Role / Device Role / Timing Role: ADC resides on high-side board; serial data transmitted across optocoupler or digital isolator using 3-wire SPI mode. Use Value: 4-wire (or 3-wire) interface eliminates need for isolated parallel bus, reducing isolator count and layout complexity. |
Use Scenario: Resistive touch screen controller in handheld POS terminals or industrial HMIs requiring low-power pen coordinate capture. IC Role / Device Role / Timing Role: Samples X/Y electrode voltages through 4-wire or 5-wire resistive overlay; uses MUX to alternate between axes rapidly. Use Value: 16.8 ksps sampling supports >100 Hz touch update rates; micropower mode extends tablet battery runtime during idle periods. |
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, 200 ksps, 2.7–5.25V supply, SPI-only interface, no separate MUX/ADC controls. | Higher speed but lacks break-before-make and independent chip selects - less suitable for high-impedance sensor multiplexing. | Choose ADS7822U only if >16.8 ksps is required and MUX flexibility is not needed. |
| MAX11131ETE+ | 8-channel, 12-bit, 100 ksps, 2.7–3.6V supply, internal reference, no external VREF pin. | Lower supply voltage range and fixed 2.048V reference limit ratiometric use with sensor excitation rails. | Select MAX11131ETE+ only for 3.3V-only systems where external reference independence is unnecessary. |
Compared with ADS7822U and MAX11131ETE+, the LTC1598CG#PBF uniquely combines ultra-low 1nA shutdown current, flexible 1.5–5.05V reference support, and independent MUX/ADC control - making it optimal for battery-critical, multi-sensor, ratiometric measurement systems.
Availability
LTC1598CG#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated industrial sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1598CG#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 LTC1598CG#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for ultra-low-power, multi-channel sensor digitization in space- and energy-constrained environments.
FAQ
What is the operating temperature range of the LTC1598CG#PBF?
The LTC1598CG#PBF is specified for commercial-grade operation from 0°C to +70°C. Its absolute maximum junction temperature is 150°C, and thermal resistance θJA is 110°C/W. This makes LTC1598CG#PBF suitable for indoor industrial enclosures and consumer electronics where ambient temperatures remain within this range.
Can the LTC1598CG#PBF operate with a 3V supply?
No - the LTC1598CG#PBF is rated for 4.5V to 5.5V supply operation only. For 3V-compatible alternatives, Analog Devices offers the LTC1598L variant (not LTC1598CG#PBF), which is separately specified and pin-compatible but requires verification of timing and reference compatibility.
Does the LTC1598CG#PBF support true differential input measurements?
No - the LTC1598CG#PBF is unipolar-only and uses COM as a single-ended negative reference. It measures each channel differentially against COM, but COM must be tied to a stable reference (e.g., AGND or sensor common), not a second signal input. True differential input capability is not supported by LTC1598CG#PBF.
How does the break-before-make interval affect channel switching in the LTC1598CG#PBF?
The LTC1598CG#PBF guarantees a 35–160 ns break-before-make interval (tOPEN) during channel transitions. This prevents momentary shorts between high-impedance sensor outputs - preserving signal integrity and avoiding crosstalk or damage in applications like thermocouple or pH probe multiplexing.
Is the LTC1598CG#PBF pin-compatible with other members of the LTC1594/LTC1598 family?
Yes - the LTC1598CG#PBF shares the same 24-pin SSOP footprint and pinout with all LTC1598 variants (e.g., LTC1598IG), including identical signal assignments for CH0–CH7, MUXOUT, ADCIN, COM, VREF, and serial interface pins. However, temperature grade and reliability testing differ between CG and IG versions.
LTC1598CG#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:
- -
LTC1598CG#PBF FAQ
1.How can I place an order for LTC1598CG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1598CG#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 LTC1598CG#PBF reliable?
The price and inventory of LTC1598CG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1598CG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1598CG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1598CG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1598CG#PBF?
LTC1598CG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1598CG#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 LTC1598CG#PBF?
For technical support, including LTC1598CG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1598CG#PBF requirements.
6.How does Aetrix verify that LTC1598CG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1598CG#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 LTC1598CG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1598CG#PBF?
All LTC1598CG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1598CG#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 LTC1598CG#PBF part is unused and in its original packaging.
Return procedure for LTC1598CG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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