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Analog Devices Inc./Maxim Integrated MAX1204BEAP
- Part No.:
- MAX1204BEAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1204BEAP.pdf
- Description:
- IC ADC 10BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
MAX1204BEAP from Maxim Integrated is a 10-bit, 8-channel serial analog-to-digital converter (ADC) designed for mixed +5V analog / +3V digital supply systems. It integrates an on-chip track/hold, internal 4.096V reference with buffer, SPI/MICROWIRE/TMS320-compatible 4-wire serial interface, and supports unipolar/bipolar input modes. Its 133ksps sampling rate, 1.5mA operating current, and software-selectable power-down modes make it suitable for battery-powered medical instruments and portable data acquisition.
For engineers reviewing the MAX1204BEAP datasheet, MAX1204BEAP pinout, MAX1204BEAP application, or MAX1204BEAP equivalent, this page delivers verified technical context, real-world design meaning of key specs (e.g., VL-pin–controlled 3V/3.3V/5V logic compatibility, ±0.5 LSB INL, 10µA shutdown current), and validated alternative options for 10-bit serial ADC migration paths in industrial and embedded systems.
Technical Context
The MAX1204BEAP employs successive-approximation architecture with integrated track/hold, enabling precise sampling at up to 133ksps using either internal clock (≈1.7MHz) or external SCLK (up to 2MHz). Its analog front-end supports 8 single-ended or 4 pseudo-differential inputs, with common-mode range from VSS to VDD and full-scale input determined by REF voltage (4.096V internal or external).
Digital interface operation is fully compatible with SPI (CPOL=0, CPHA=0) and MICROWIRE protocols; SSTRB provides direct TMS320 DSP synchronization. The VL pin decouples digital I/O voltage (2.7V–5.25V) from VDD, allowing seamless interfacing with 3V microcontrollers while maintaining 5V analog supply integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete output codes for precision measurement in sensor and control loops |
| Sampling Rate | 133ksps - enables accurate capture of signals up to 800kHz full-power bandwidth |
| INL (Relative Accuracy) | ±0.5 LSB - ensures monotonicity and <0.05% full-scale linearity error across temperature |
| Supply Current (Operating) | 1.5mA - supports low-power operation in portable instrumentation without active cooling |
| Shutdown Current | 2µA (full power-down) - allows deep sleep between conversions to extend battery life |
| Reference Voltage | Internal 4.096V ±0.5% - provides stable, calibrated full-scale for unipolar 0–4.096V or bipolar ±2.048V input ranges |
| Digital I/O Voltage Range | VL = 2.7V to 5.25V - permits direct connection to 3V, 3.3V, or 5V logic without level shifters |
Pinout & Package
MAX1204BEAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential pairs; input protection clamps to VSS/VDD ±0.3V |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (unipolar) or –5V ±5% (bipolar); defines analog ground reference for differential mode |
| SHDN (Pin 10) | Three-Level Shutdown Control | Low = 10µA shutdown; float = external REFADJ compensation; VDD = internal compensation |
| REF (Pin 11) | Reference Buffer Output / ADC Reference Input | Supplies 4.096V nominal (adjustable via REFADJ); disable buffer by tying REFADJ to VDD for external reference use |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge synchronized; high-impedance when CS is high; logic swing set by VL |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB VOH/VOL levels (2.7V–5.25V); isolates digital I/O from analog VDD noise |
| GND (Pin 13) | Analog/Digital Ground | Common return for analog inputs and digital logic; serves as IN– in single-ended mode |
| REFADJ (Pin 12) | Reference Buffer Adjustment Input | Adjusts internal reference gain (±1.5% range); tie to VDD to disable buffer for external reference |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, multiplexer, and reference buffer; supports single or dual ±5V operation |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; 40–60% duty cycle required |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; DOUT/SSTRB enter high-Z state when CS is high |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte on SCLK rising edge; START bit initiates conversion sequence |
| SSTRB (Pin 16) | Serial Strobe Output | Signals conversion start/end: low during conversion (internal clock) or pulses before MSB (external clock) |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable unipolar/bipolar input mode | Single control-bit selection (UNI/BIP) enables flexible signal range mapping without hardware change |
| Internal track/hold with 1.5µs acquisition time | Eliminates need for external sample-and-hold; supports source impedances ≤4kΩ without AC performance loss |
| Pin-compatible 12-bit upgrade path (MAX1202) | Same 20-pin SSOP footprint and interface protocol allow resolution scaling without PCB redesign |
| Three power-down modes (full/fast/operating) | Enables dynamic current optimization: 2µA shutdown, 30µA fast wake-up, or 1.5mA continuous operation |
| 4.096V internal reference with ±0.8ppm/°C tempco | Provides stable, factory-trimmed full-scale for high-accuracy measurements across 0°C to +70°C range |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous vital-sign monitoring (ECG, SpO₂) in handheld patient monitors with limited battery capacity. IC Role / Device Role / Timing Role: 10-bit ADC digitizing low-noise analog sensor outputs at 100–200Hz, synchronized via SSTRB to low-power MCU sleep/wake cycles. Use Value: 2µA shutdown current extends battery life; VL pin enables direct 3.3V MCU interface without level-shifting components. |
Use Scenario: Environmental parameter logging (temperature, humidity, pressure) in remote field sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power ADC acquiring multi-channel analog inputs intermittently, triggered by MCU timer events. Use Value: Software-selectable power-down modes reduce average current to <10µA at 1ksps; internal reference eliminates external precision voltage source. |
| Industrial Process Control Sensors | Automated Test Equipment (ATE) Front-End |
Use Scenario: Analog signal conditioning in PLC I/O modules requiring robustness against supply rail variations and EMI. IC Role / Device Role / Timing Role: 8-channel multiplexed ADC converting 4–20mA loop signals and thermocouple outputs with bipolar support. Use Value: ±5V dual-supply operation and VSS-referenced inputs tolerate noisy industrial grounds; ±0.5 LSB INL ensures calibration stability over temperature. |
Use Scenario: Modular ATE channel cards performing rapid parametric testing of analog ICs and passive components. IC Role / Device Role / Timing Role: High-speed serial ADC capturing transient waveforms with precise timing alignment via SSTRB strobe to FPGA controller. Use Value: 133ksps sampling and 2MHz serial interface enable >100k samples/sec throughput; SPI/MICROWIRE compatibility simplifies firmware integration. |
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 |
|---|---|---|---|
| MAX1202BEAP | 12-bit resolution, identical pinout and interface; higher INL (±1 LSB), same 133ksps rate and 2µA shutdown | Required where >10-bit precision is needed without changing layout or firmware timing | Select MAX1202BEAP when resolution upgrade is prioritized over minimal power increase (1.8mA vs. 1.5mA) |
| ADS7822U | 12-bit, SPI-only (no MICROWIRE/TMS320 strobe), 200ksps, 1.25mA operating current, no internal reference | Requires external 2.5V reference and lacks SSTRB for DSP sync; better for pure SPI-based µC systems | Choose ADS7822U only if internal reference is unnecessary and higher speed justifies added BOM complexity |
Compared with MAX1204BEAP, the MAX1202BEAP offers drop-in resolution upgrade with identical package and timing, while the ADS7822U trades strobe capability and internal reference for marginally higher speed and lower operating current-making MAX1204BEAP optimal for mixed-voltage, low-power, DSP-coupled designs.
Availability
MAX1204BEAP is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data loggers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1204BEAP 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 MAX1204BEAP belongs to Maxim's precision data-acquisition product line, engineered for mixed-voltage embedded systems where low power, small size, and seamless 3V/5V interoperability are critical design constraints.
FAQ
What is the operating temperature range for the MAX1204BEAP?
The MAX1204BEAP is specified for the extended temperature range of –40°C to +85°C, matching the 'E' grade in its part number suffix. This makes MAX1204BEAP suitable for deployment in harsh industrial environments and automotive-adjacent applications where ambient temperatures exceed commercial-grade limits.
Does the MAX1204BEAP require an external reference voltage?
No, the MAX1204BEAP includes a factory-trimmed 4.096V internal reference with ±0.5% initial accuracy and ±0.8ppm/°C temperature coefficient. An external reference can be used by disabling the internal buffer via REFADJ, but MAX1204BEAP operates fully functional with its internal reference enabled.
How does the VL pin affect digital interface compatibility in the MAX1204BEAP?
The VL pin on MAX1204BEAP sets the output voltage levels of DOUT and SSTRB, supporting 2.7V to 5.25V logic swings. When VL = 3.3V, MAX1204BEAP drives clean 3.3V CMOS-compatible outputs directly-eliminating level shifters when interfacing with modern 3V microcontrollers or FPGAs.
Can the MAX1204BEAP operate with a single +5V supply?
Yes, MAX1204BEAP supports single +5V analog supply (VDD = +5V, VSS = GND) for unipolar operation. For bipolar input ranges (±2.048V), it requires dual ±5V supplies (VDD = +5V, VSS = –5V). Both configurations are fully supported per the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables.
What is the minimum acquisition time required before conversion in the MAX1204BEAP?
The MAX1204BEAP specifies a minimum acquisition time (tACQ) of 1.5µs, defined as the time needed for the internal track/hold capacitor to settle after the control byte is loaded. This value is guaranteed across temperature and supply conditions and must be respected to maintain ±0.5 LSB INL performance.
MAX1204BEAP 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:
- Obsolete
- 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:
- -
MAX1204BEAP FAQ
1.How can I place an order for MAX1204BEAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1204BEAP 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 MAX1204BEAP reliable?
The price and inventory of MAX1204BEAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1204BEAP is usually 5 days.
3.What payment methods are accepted for MAX1204BEAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1204BEAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1204BEAP?
MAX1204BEAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1204BEAP 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 MAX1204BEAP?
For technical support, including MAX1204BEAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1204BEAP requirements.
6.How does Aetrix verify that MAX1204BEAP is sourced from the original manufacturer or authorized distributors?
All MAX1204BEAP 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 MAX1204BEAP meets industry standards.
7.What is the process for return or replacement of MAX1204BEAP?
All MAX1204BEAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1204BEAP, 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 MAX1204BEAP part is unused and in its original packaging.
Return procedure for MAX1204BEAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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