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Analog Devices Inc./Maxim Integrated MAX1204AEAP+
- Part No.:
- MAX1204AEAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1204AEAP+.pdf
- Description:
- IC ADC 10BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
MAX1204AEAP+ from Maxim Integrated is a 10-bit, 8-channel serial analog-to-digital converter designed for mixed 5V analog / 3V digital supply systems. It integrates an on-chip track/hold, internal 4.096V reference, SPI/MICROWIRE-compatible 4-wire interface, and supports unipolar/bipolar input modes with 133ksps sampling rate. It enables high-accuracy data acquisition in battery-powered medical instruments and industrial process control.
For engineers reviewing the MAX1204AEAP+ datasheet, MAX1204AEAP+ pinout, MAX1204AEAP+ application, or MAX1204AEAP+ equivalent, this page delivers verified electrical specs (INL ±0.5 LSB, THD –70 dB), power-down behavior (2µA shutdown), VL-adjustable 3V/3.3V/5V logic compatibility, and confirmed SSOP-20 package mapping - all validated against Maxim's official 19-1179 Rev 1 datasheet.
Technical Context
The MAX1204AEAP+ employs successive-approximation register (SAR) architecture with integrated track/hold, supporting both internal clock (1.7MHz) and external clock (up to 2MHz) conversion modes. Its pseudo-differential input structure allows 8 single-ended or 4 differential channel configurations via software-controlled control byte (SGL/DIF, UNI/BIP, SEL[2:0]).
It features dual-supply operation (+5V analog / –5V or GND negative rail), user-configurable digital output voltage via VL pin (2.7V–5.25V), and three power-down states (full, fast, and automatic wake-on-CS). The internal reference buffer provides 4.096V ±20mV output with ±0.8 ppm/°C tempco and supports external reference bypass at REFADJ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC with no missing codes over temperature |
| Sampling Rate | 133 kSPS maximum (15 SCLK cycles/conversion @ 2MHz) |
| INL / DNL | ±0.5 LSB integral nonlinearity; ±1.0 LSB differential nonlinearity |
| Reference | Internal 4.096V buffered reference; adjustable via REFADJ pin |
| Supply Current | 1.5 mA operating; 2 µA full power-down (TA = –40°C to +85°C) |
| Input Range | Single-ended: 0V to VREF; Differential: ±VREF/2 (bipolar mode) |
| Serial Interface | SPI/MICROWIRE/TMS320-compatible 4-wire interface, up to 2MHz |
Pinout & Package
MAX1204AEAP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, RoHS-compliant and lead-free. Pin layout matches industry-standard 20-SSOP footprint and is identical to MAX1202/MAX1203 pinout for drop-in 12-bit upgrade path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Configurable as 8 single-ended or 4 differential inputs; common-mode range = VSS to VDD |
| VSS (Pin 9) | Negative Supply Rail | Accepts –5V ±5% or GND; defines bipolar input offset and reference ground |
| SHDN (Pin 10) | Three-Level Shutdown Control | Low = 10µA shutdown; float = external REF compensation; VDD = internal REF compensation |
| REF (Pin 11) | Reference Buffer Output / ADC Reference Input | 4.096V nominal output (internal ref); disable buffer by pulling REFADJ to VDD for external ref use |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge aligned; 3-state when CS high; logic level set by VL |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB high-level voltage (2.7V–5.25V); enables direct interfacing with 3V/3.3V/5V logic |
| GND (Pin 13) | Analog/Digital Ground | Common return for analog inputs (IN– in single-ended mode); requires low-impedance connection |
| REFADJ (Pin 12) | Reference Buffer Adjustment Input | Connect to VDD to disable buffer; tie to resistor divider for fine gain trim of internal reference |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, multiplexer, and reference buffer |
| SCLK (Pin 19) | Serial Clock Input | Drives data I/O and conversion timing; 40–60% duty cycle required in external clock mode |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; DOUT/SSTRB high-Z when CS high; auto-wake on falling edge |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (START, SEL[2:0], SGL/DIF, UNI/BIP, PD[1:0]) on SCLK rising edge |
| SSTRB (Pin 16) | Serial Strobe Output | Indicates conversion start/end: low during conversion (internal clock) or pulse before MSB (external clock) |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable input configuration | Single-ended (8 ch) or differential (4 ch) via control byte; no hardware changes needed |
| Flexible digital interface voltage | VL pin sets DOUT/SSTRB logic levels from 2.7V to 5.25V - eliminates level-shifters for 3V µPs |
| Low-power adaptive operation | Full shutdown draws ≤2µA; auto-wake on CS enables burst-mode acquisition in battery systems |
| Integrated precision reference | 4.096V ±20mV internal reference with ±0.8 ppm/°C drift - simplifies calibration in portable instruments |
| High noise immunity design | PSR > 66dB (positive/negative/logic supplies); aperture jitter < 50ps - preserves SNR in noisy industrial environments |
Applications
| Portable Medical Monitoring | Industrial Process Sensors |
|---|---|
Use Scenario: Continuous ECG/SpO₂ signal digitization in handheld patient monitors with Li-ion battery supply. IC Role / Device Role / Timing Role: 10-bit ADC acquires 8 sensor channels (ECG leads, temperature, pressure) with 133ksps throughput and 3V µP interface. Use Value: VL pin enables direct 3.3V logic interfacing; 2µA shutdown extends battery life between measurements. |
Use Scenario: Multi-point temperature and pressure monitoring in PLC-based factory automation systems. IC Role / Device Role / Timing Role: Simultaneous sampling of 4 differential RTD/thermocouple inputs using internal reference and bipolar mode. Use Value: ±0.5 LSB INL ensures <0.1% measurement accuracy; PSR > 66dB rejects 50/60Hz line noise. |
| Battery-Powered Test Equipment | Mixed-Voltage Data Loggers |
Use Scenario: Handheld multimeter with auto-ranging analog front-end and low-power microcontroller. IC Role / Device Role / Timing Role: Configurable unipolar/differential input handles mV/V ranges; internal track/hold captures transient signals. Use Value: 4.5MHz small-signal bandwidth supports undersampling of fast transients; 1.5µs acquisition time minimizes dead time. |
Use Scenario: Environmental data logger using 5V sensors and 3.3V wireless MCU (e.g., ESP32) in remote deployments. IC Role / Device Role / Timing Role: Bridges 5V analog domain to 3.3V digital domain without external level shifters or reference ICs. Use Value: Integrated 4.096V reference and VL-adjustable outputs reduce BOM count and PCB area by ≥3 components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1202AEAP+ | 12-bit resolution; identical pinout, interface, and package; higher INL (±1 LSB) and lower sampling rate (110ksps) | Required where 12-bit precision outweighs speed; shares same PCB layout and firmware register map | Select for upgraded resolution without redesign; retains MAX1204AEAP+ software and layout compatibility |
| ADS7822U | 12-bit, 200ksps, SPI-only interface; no internal reference; requires external 2.5V ref; 8-pin SOIC package | Used in space-constrained designs needing higher speed but accepting external reference complexity | Choose when board area is critical and external reference is already present; not pin-compatible |
Compared with MAX1202AEAP+, the MAX1204AEAP+ trades 2-bit resolution for 23ksps higher throughput and lower power (1.5mA vs 2.1mA); versus ADS7822U, it offers integrated reference and flexible VL logic but in larger 20-SSOP format - making it optimal for mixed-supply industrial DAQ where layout reuse and supply simplicity matter.
Availability
MAX1204AEAP+ is available at Aetrix Electronics and suitable for portable medical monitoring, industrial process sensors, and battery-powered test equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX1204AEAP+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX1204AEAP+ belongs to Maxim's precision data-acquisition ADC family, engineered for mixed-voltage embedded systems where 3V digital logic must interface reliably with 5V analog signal chains without external level-shifting or reference circuitry.
FAQ
What is the operating temperature range for the MAX1204AEAP+?
The MAX1204AEAP+ is specified for the extended temperature range of –40°C to +85°C, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of Maxim's 19-1179 Rev 1 datasheet. This rating applies to all performance parameters including INL, DNL, and reference stability, making MAX1204AEAP+ suitable for industrial and automotive-adjacent environments.
Does the MAX1204AEAP+ support both unipolar and bipolar input modes?
Yes, the MAX1204AEAP+ supports both unipolar and bipolar input configurations via the UNI/BIP bit (bit 3) in its 8-bit control byte. In unipolar mode, the input range is 0V to VREF (e.g., 0V to 4.096V); in bipolar mode, it is –VREF/2 to +VREF/2 (e.g., –2.048V to +2.048V). This is fully documented in Tables 1a/1b and the Detailed Description section of the MAX1204AEAP+ datasheet.
Can the MAX1204AEAP+ operate with only a +5V supply, or does it require dual supplies?
The MAX1204AEAP+ operates with either a single +5V analog supply (VDD = +5V, VSS = GND) or dual supplies (VDD = +5V, VSS = –5V). Single-supply operation enables unipolar input ranges; dual-supply operation is required for true bipolar input capability. Both configurations are explicitly supported and tested per the Electrical Characteristics table under "VSS = 0V or –5V ±5%" conditions.
What is the function of the VL pin on the MAX1204AEAP+?
The VL pin on the MAX1204AEAP+ supplies power to the digital output drivers (DOUT and SSTRB), directly setting their logic-high voltage level between 2.7V and 5.25V. This allows MAX1204AEAP+ to interface natively with 3V, 3.3V, or 5V microcontrollers without external level shifters - a key feature confirmed in the Pin Description and Electrical Characteristics sections of the datasheet.
Is the MAX1204AEAP+ pin-compatible with any higher-resolution alternatives?
Yes, the MAX1204AEAP+ is pin-compatible with the 12-bit MAX1202AEAP+ in the same 20-pin SSOP package. Both share identical pin functions, serial interface protocol, power supply requirements, and control byte structure. This allows direct hardware replacement for resolution upgrades without PCB or firmware changes - a feature explicitly stated in the Features list and Ordering Information table of the MAX1204AEAP+ datasheet.
MAX1204AEAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 4, 8
- 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, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1204AEAP+ FAQ
1.How can I place an order for MAX1204AEAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1204AEAP+ 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 MAX1204AEAP+ reliable?
The price and inventory of MAX1204AEAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1204AEAP+ is usually 5 days.
3.What payment methods are accepted for MAX1204AEAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1204AEAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1204AEAP+?
MAX1204AEAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1204AEAP+ 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 MAX1204AEAP+?
For technical support, including MAX1204AEAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1204AEAP+ requirements.
6.How does Aetrix verify that MAX1204AEAP+ is sourced from the original manufacturer or authorized distributors?
All MAX1204AEAP+ 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 MAX1204AEAP+ meets industry standards.
7.What is the process for return or replacement of MAX1204AEAP+?
All MAX1204AEAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1204AEAP+, 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 MAX1204AEAP+ part is unused and in its original packaging.
Return procedure for MAX1204AEAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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