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Analog Devices Inc./Maxim Integrated MAX1230ACEG+T
- Part No.:
- MAX1230ACEG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1230ACEG+T.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,953
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Product details
Overview
MAX1230ACEG+T from Maxim Integrated is a 12-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over -40°C to +85°C), 16-entry FIFO, internal 4.096V reference, and true differential track/hold. It supports 16 single-ended or 8 differential input channels in unipolar/bipolar modes and operates from a single +5V supply. Used in industrial control systems for multichannel voltage and temperature monitoring.
For engineers reviewing the MAX1230ACEG+T datasheet, MAX1230ACEG+T pinout, MAX1230ACEG+T application, or MAX1230ACEG+T equivalent, this page delivers verified specifications, package mapping, real-world use scenarios, and validated alternative options - all grounded in Maxim's official documentation and electrical characterization data.
Technical Context
The MAX1230ACEG+T implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both single-ended and true differential inputs. Its internal oscillator enables autonomous conversion timing in clock modes 00, 01, and 10, while external SCLK up to 10MHz drives serial interface communication.
It integrates an internal temperature sensor with 1/8°C resolution and ±1.2°C accuracy over full temperature range, always referenced to its internal 4.096V reference. The 16-deep FIFO buffers ADC results and temperature readings independently, enabling burst acquisition without serial bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB INL/DNL accuracy with no missing codes across -40°C to +85°C. |
| Sampling Rate | 300ksps max - achievable only with externally clocked mode (CKSEL = 11) and 4.8MHz SCLK. |
| Input Channels | 16 single-ended or 8 true differential - configurable per setup register; AIN12–AIN15 available only on MAX1230. |
| Internal Reference | 4.096V ±72mV (±20ppm/°C TC) - eliminates need for external precision reference in most applications. |
| Temperature Sensor | ±1.2°C error over full range, 1/8°C resolution - calibrated against internal reference, usable for system-level thermal monitoring. |
| Supply Current | 2.3mA at 300ksps (internal ref), 0.2–5µA in shutdown - enables low-power data logging with AutoShutdown™. |
| Digital Interface | 10MHz SPI/QSPI/MICROWIRE-compatible 3-wire - supports CPOL/CPHA = 00 or 11; DOUT updated on SCLK falling edge. |
Pinout & Package
The MAX1230ACEG+T is packaged in a 28-pin 5mm × 5mm thin QFN with exposed pad (EP), RoHS-compliant and lead-free. The exposed pad must be connected to GND for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17, 19, 25 | N.C. | No internal connection - leave floating or ground per layout best practice; not electrically active. |
| 2–12, 26–28 | AIN0–AIN13 | Analog input channels - support single-ended or true differential pairing (e.g., AIN0/AIN1); AIN12–AIN15 exclusive to MAX1230. |
| 13 | REF-/AIN14 | Negative reference input or analog channel 14 - dual-function; REF- mode disables AIN14 usage. |
| 14 | CNVST/AIN15 | Active-low conversion start or analog channel 15 - configured via setup register; only one function active at a time. |
| 15 | REF+ | Positive reference input - requires 0.1µF bypass capacitor to GND; accepts internal 4.096V or external differential reference. |
| 16 | GND | Analog/digital ground - common return for VDD, REF+, and analog inputs; connect EP to this node. |
| 18 | VDD | +5V power supply - 4.75V to 5.25V range; bypass with 0.1µF ceramic capacitor near pin. |
| 20 | SCLK | Serial clock input - 40–60% duty cycle required; clocks DIN on rising edge, DOUT on falling edge. |
| 21 | CS | Active-low chip select - enables serial interface when low; places DOUT in high-impedance state when high. |
| 22 | DIN | Serial data input - latched on rising SCLK edge; carries setup, conversion, and configuration bytes (MSB first). |
| 23 | DOUT | Serial data output - outputs FIFO data MSB-first on falling SCLK; high-Z when CS = VDD. |
| 24 | EOC | End-of-conversion flag - active-low pulse indicates completion of last requested operation (except in CKSEL=11 mode). |
| EP | Exposed Pad | Internally tied to GND - must be soldered to large PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| 16-entry FIFO buffer | Stores up to 16 ADC results plus one temperature reading - decouples conversion from host readout, enabling deterministic timing in real-time systems. |
| True differential track/hold | Supports 8 independent differential pairs (e.g., AIN0/AIN1) with common-mode rejection - eliminates DC offsets and improves noise immunity in noisy industrial environments. |
| Internal temperature sensor | Calibrated ±1.2°C accuracy over -40°C to +85°C, 1/8°C resolution - provides system-level thermal awareness without external sensors or calibration. |
| AutoShutdown™ mode | Reduces supply current to 0.2–5µA during idle - extends battery life in portable data loggers and reduces self-heating in thermally sensitive measurements. |
| Configurable clock modes | Four modes (CKSEL[1:0]) enable flexible timing: internal scan, CNVST-triggered, serial-initiated, or externally clocked - adapts to host controller resource constraints. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous monitoring of 12+ sensor signals (thermocouples, pressure transducers, current shunts) in PLC-based manufacturing lines. IC Role / Device Role / Timing Role: Central multichannel ADC handling synchronized voltage and temperature sampling at 100ksps with FIFO buffering to absorb host latency. Use Value: Eliminates need for external multiplexer and reference; 16-channel count reduces board space vs. dual 8-channel alternatives. | Use Scenario: Bedside monitor acquiring ECG leads, respiration impedance, and skin temperature from 8+ electrodes. IC Role / Device Role / Timing Role: Simultaneous true-differential acquisition of biopotential signals with built-in temperature compensation for gain drift correction. Use Value: Internal 4.096V reference ensures consistent full-scale definition across channels; ±1.2°C temp sensor enables real-time ADC offset correction. |
| Automated Test Equipment (ATE) | Environmental Data Logger |
Use Scenario: Rack-mounted unit performing rapid parametric testing of power supplies, measuring output ripple, load regulation, and thermal derating. IC Role / Device Role / Timing Role: High-speed 300ksps sampling in externally clocked mode (CKSEL=11) with precise aperture jitter (<50ps) for FFT-based harmonic analysis. Use Value: 73dB SINAD and 89dB SFDR meet Class I ATE requirements; 1MHz full-power bandwidth supports undersampling of switching noise. | Use Scenario: Solar-powered remote station logging soil moisture, ambient temperature, and panel voltage over months. IC Role / Device Role / Timing Role: Low-power ADC operating in AutoShutdown™ between 10s-interval conversions, using internal reference and temperature sensor for self-calibration. Use Value: 2.3mA active current and sub-5µA shutdown enable multi-year battery life; internal temp sensor validates long-term reference stability. |
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 |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit, SAR ADC with ±10.24V input range; uses external reference; no integrated temp sensor. | Better resolution and wider input range, but lacks on-chip temperature sensing and FIFO - requires external logic for burst acquisition. | Select when higher resolution and bipolar ±10V inputs are critical; avoid if system-level thermal monitoring or autonomous scanning is required. |
| AD7949BCPZ-RL7 | 8-channel, 14-bit, SAR ADC with 500ksps rate; SPI interface; no FIFO or internal temp sensor; requires external reference. | Higher speed and resolution, but no on-chip FIFO or temperature measurement - demands continuous host polling and external thermal management. | Choose for high-throughput applications where host can manage timing; not suitable as drop-in replacement due to missing FIFO and temp sensor functionality. |
Compared with ADS8688IPWR and AD7949BCPZ-RL7, the MAX1230ACEG+T uniquely integrates FIFO buffering, internal temperature sensing, and a precision reference - reducing BOM count and firmware complexity in embedded monitoring systems requiring autonomous multichannel acquisition.
Availability
MAX1230ACEG+T is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, automated test equipment, and environmental data logging requiring stable component supply across extended temperature ranges.
Supply support for MAX1230ACEG+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1230ACEG+T belongs to Maxim's high-accuracy, low-power SAR ADC family targeting embedded data acquisition where integration of reference, temperature sensing, and FIFO reduces system-level design effort.
FAQ
What is the maximum sampling rate achievable with the MAX1230ACEG+T?
The MAX1230ACEG+T achieves a maximum sampling rate of 300ksps only in externally clocked mode (CKSEL1/CKSEL0 = 11) with SCLK up to 4.8MHz. In internally clocked modes, the rate is lower due to oscillator tolerance and acquisition time overhead. The 300ksps figure assumes optimal source impedance (<300Ω) and proper bypassing of REF+ and VDD pins with 0.1µF capacitors. MAX1230ACEG+T datasheet Section "Conversion Time Calculations" confirms this limit under specified timing conditions.
Does the MAX1230ACEG+T require an external reference voltage?
No, the MAX1230ACEG+T includes a factory-trimmed internal 4.096V reference with ±20ppm/°C temperature coefficient and 200µVRMS noise - sufficient for most industrial and medical applications. An external differential reference may be used via REF+ and REF- pins, but doing so disables the internal temperature sensor, which relies exclusively on the internal reference. MAX1230ACEG+T Electrical Characteristics Table confirms internal reference voltage as 4.024V to 4.168V at 25°C.
How many analog input channels does the MAX1230ACEG+T support in differential mode?
The MAX1230ACEG+T supports eight true differential input pairs: AIN0/AIN1, AIN2/AIN3, AIN4/AIN5, AIN6/AIN7, AIN8/AIN9, AIN10/AIN11, AIN12/AIN13, and AIN14/AIN15. This is explicitly stated in the General Description and confirmed in Pin Description Table, which notes AIN12–AIN15 are available only on MAX1230. Differential mode requires configuration via the setup register's DIFFSEL bits and valid pairing per Table 3 in the MAX1230ACEG+T datasheet.
What is the accuracy of the internal temperature sensor in the MAX1230ACEG+T?
The internal temperature sensor in the MAX1230ACEG+T has a measurement error of ±1.2°C over the full -40°C to +85°C operating range, with ±0.7°C typical accuracy at +25°C. It provides 1/8°C resolution in two's complement format and is calibrated against the internal 4.096V reference. This specification is documented in the "INTERNAL TEMPERATURE SENSOR" section of the MAX1230ACEG+T Electrical Characteristics table and validated in Figure toc16 (Temperature Sensor Error vs. Temperature).
Can the MAX1230ACEG+T operate from a 3.3V supply?
No, the MAX1230ACEG+T is specified only for +5V ±5% operation (4.75V to 5.25V). Its absolute maximum VDD rating is +6V, and electrical characteristics - including reference stability, INL/DNL, and digital interface thresholds - are guaranteed only within the 5V range. Attempting 3.3V operation will result in undefined behavior, failure to power up the internal reference, and invalid temperature readings. MAX1230ACEG+T Absolute Maximum Ratings and Electrical Characteristics tables confirm VDD min/max as 4.75V/5.25V.
MAX1230ACEG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, 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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Temperature Sensor
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1230ACEG+T FAQ
1.How can I place an order for MAX1230ACEG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1230ACEG+T 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 MAX1230ACEG+T reliable?
The price and inventory of MAX1230ACEG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1230ACEG+T is usually 5 days.
3.What payment methods are accepted for MAX1230ACEG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1230ACEG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1230ACEG+T?
MAX1230ACEG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1230ACEG+T 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 MAX1230ACEG+T?
For technical support, including MAX1230ACEG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1230ACEG+T requirements.
6.How does Aetrix verify that MAX1230ACEG+T is sourced from the original manufacturer or authorized distributors?
All MAX1230ACEG+T 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 MAX1230ACEG+T meets industry standards.
7.What is the process for return or replacement of MAX1230ACEG+T?
All MAX1230ACEG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1230ACEG+T, 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 MAX1230ACEG+T part is unused and in its original packaging.
Return procedure for MAX1230ACEG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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