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Analog Devices Inc./Maxim Integrated MAX1204ACPP+
- Part No.:
- MAX1204ACPP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
MAX1204ACPP+.pdf
- Description:
- IC ADC 10BIT 8CH 20-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,631
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Product details
Overview
MAX1204ACPP+ 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 internal track/hold, 4.096V reference, SPI/MICROWIRE-compatible 4-wire serial interface, and supports unipolar/bipolar input modes. Its 133ksps sampling rate, 1.5mA operating current, and VL pin for 2.7V–5.25V logic-level control enable direct interfacing with 3V microcontrollers in portable data acquisition.
For engineers reviewing the MAX1204ACPP+ datasheet, MAX1204ACPP+ pinout, MAX1204ACPP+ application, or MAX1204ACPP+ equivalent, this device delivers verified 10-bit resolution, ±0.5 LSB INL, 133ksps throughput, and dual-supply operation - critical for battery-powered instrumentation, medical sensors, and industrial process monitoring where supply rail separation and low-power conversion are mandatory.
Technical Context
The MAX1204ACPP+ employs successive-approximation register (SAR) architecture with integrated track/hold and programmable clock mode (internal or external up to 2MHz). Its analog front-end supports both single-ended (8-channel) and pseudo-differential (4-channel) inputs, with common-mode range from VSS to VDD and full-scale selection via internal or external reference.
Digital interface compliance includes SPI Mode 0 (CPOL=0, CPHA=0) and MICROWIRE protocols; SSTRB provides timing synchronization for TMS320-family DSPs. Power management features include two software-selectable power-down modes (fast: 30µA; full: 2µA) and hardware SHDN pin enabling sub-10µA shutdown current at reduced sampling rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC - delivers 1024 discrete output codes with monotonic transfer function. |
| Sampling Rate | 133ksps - enables real-time capture of signals up to 66.5kHz (Nyquist) with external 2MHz clock. |
| INL / DNL | ±0.5 LSB / ±1.0 LSB - ensures accurate code transition linearity across full temperature range (0°C to +70°C). |
| Reference | Internal 4.096V ±0.5% (±20ppm/°C drift) - eliminates need for external precision reference in most applications. |
| Supply Current | 1.5mA (active), 2µA (full power-down) - supports energy-constrained battery operation with dynamic duty cycling. |
| Input Range | Unipolar: 0V to VREF; Bipolar: ±VREF/2 - configurable via control byte for flexible signal conditioning. |
| Digital Interface | SPI/MICROWIRE 4-wire (DIN/DOUT/SCLK/CS) + SSTRB strobe - directly connects to 3V/5V µPs without level shifters. |
Pinout & Package
MAX1204ACPP+ is housed in a 20-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin pitch is 0.1 inch; lead finish is lead(Pb)-free/RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential inputs; input protection clamps to VDD/VSS (±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 | Delivers 4.096V (internal) or accepts external reference; buffered output simplifies gain trim. |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge synchronized; three-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 interface with 3V logic. |
| 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 | Tie to GND for internal 4.096V ref; tie to VDD to disable buffer for external reference use. |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, multiplexer, and reference buffer. |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; 100kHz–2MHz compatible. |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; DOUT/SSTRB enter high-impedance state when CS is high. |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte on SCLK rising edge; defines channel, mode, and clock/power-down settings. |
| SSTRB (Pin 16) | Serial Strobe Output | Indicates conversion start/end: low during conversion (internal clock) or pulses before MSB (external clock). |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with track/hold | Reduces external sample-hold circuitry and PCB area; 1.5µs acquisition time supports ≤133ksps sustained sampling. |
| User-adjustable digital output levels (VL pin) | Enables seamless interfacing with 3V, 3.3V, or 5V logic families without external level translators. |
| Internal 4.096V reference with buffer | Eliminates external reference IC and trimming components; ±0.5% initial accuracy simplifies calibration. |
| Two software-configurable power-down modes | Reduces average supply current to <10µA between conversions - essential for battery life extension. |
| SPI/MICROWIRE/TMS320-compatible interface | Direct connection to industry-standard controllers without glue logic or protocol translation firmware. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Continuous vital-sign acquisition (ECG, SpO₂) in handheld patient monitors powered by Li-ion batteries. IC Role / Device Role / Timing Role: 10-bit ADC digitizing low-noise analog sensor outputs with 133ksps sampling and 2µA shutdown between readings. Use Value: Enables >100-hour battery life while maintaining clinical-grade resolution and supporting bipolar ECG input ranges. |
Use Scenario: Real-time analog signal logging (temperature, pressure, flow) in PLC I/O modules with isolated 5V/3V domains. IC Role / Device Role / Timing Role: Mixed-supply ADC acquiring 8 sensor channels with internal reference stability across -40°C to +85°C extended range. Use Value: Eliminates external reference and level-shifting components, reducing BOM cost and board space by 30% vs. discrete solutions. |
| Battery-Powered Test Equipment | Automotive Diagnostic Tools |
Use Scenario: Handheld multimeter or oscilloscope probe with auto-ranging and low-power sleep mode. IC Role / Device Role / Timing Role: High-speed 10-bit ADC performing rapid unipolar/differential measurements using internal clock mode for deterministic latency. Use Value: Achieves 133ksps throughput with 1.5mA active current and sub-10µA standby - extends runtime per charge cycle. |
Use Scenario: OBD-II scan tool capturing CAN bus auxiliary analog signals (coolant temp, throttle position) alongside digital diagnostics. IC Role / Device Role / Timing Role: Robust ADC operating from vehicle's 5V rail while interfacing with 3.3V microcontroller via VL-controlled outputs. Use Value: Withstands automotive transients (±6V absolute max ratings) and maintains ±0.5 LSB linearity across temperature swings. |
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 |
|---|---|---|---|
| MAX1202ACPP+ | 12-bit resolution, same pinout and serial interface; higher INL (±1 LSB), 100ksps max sampling rate. | Used where higher resolution outweighs speed loss - e.g., precision thermocouple measurement. | Select MAX1202ACPP+ only if 12-bit resolution is required and 133ksps is not critical. |
| ADS7822U | 12-bit, 200ksps, SPI-only (no MICROWIRE/TMS320 strobe), no internal reference, requires external 2.5V ref. | Preferred in high-speed, low-latency µP interfaces where external reference is already present. | Choose ADS7822U when system already uses 2.5V reference and needs faster sampling than MAX1204ACPP+ offers. |
Compared with MAX1204ACPP+, MAX1202ACPP+ trades speed for resolution and shares identical packaging and control logic, while ADS7822U sacrifices internal reference and strobe flexibility for higher throughput - making MAX1204ACPP+ optimal for mixed-supply, low-power, self-contained data acquisition.
Availability
MAX1204ACPP+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, and battery-powered test equipment requiring stable component supply across commercial temperature range (0°C to +70°C).
Supply support for MAX1204ACPP+ 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 demanding industrial, medical, and communications applications.
The MAX1204 belongs to Maxim's serial ADC product line, engineered specifically for mixed-voltage systems where 3V digital logic must interface reliably with 5V analog signal chains without external level shifting.
FAQ
What is the maximum sampling rate of the MAX1204ACPP+?
The MAX1204ACPP+ achieves a maximum sampling rate of 133ksps when using a 2MHz external serial clock and 15 clock cycles per conversion. This rate is guaranteed over the full commercial temperature range (0°C to +70°C) and applies to both unipolar and bipolar input modes with internal reference enabled.
Does the MAX1204ACPP+ require an external reference voltage?
No, the MAX1204ACPP+ includes an internal 4.096V reference with ±0.5% initial accuracy and ±20ppm/°C temperature coefficient. An external reference can be used by disabling the internal buffer via REFADJ = VDD, but it is not required for standard operation.
How does the VL pin affect digital output behavior in the MAX1204ACPP+?
On the MAX1204ACPP+, the VL pin sets the high-level voltage for DOUT and SSTRB outputs. Applying 2.7V–5.25V to VL configures the outputs to match the host microcontroller's logic family - enabling direct 3V interface without level shifters and preventing overvoltage damage to 3V I/O pins.
Can the MAX1204ACPP+ operate with a single +5V supply?
Yes, the MAX1204ACPP+ operates with a single +5V analog supply (VDD = +5V, VSS = GND) in unipolar mode. For bipolar input ranges (±VREF/2), a negative supply (VSS = -5V ±5%) is required - confirmed in Absolute Maximum Ratings and Electrical Characteristics tables.
What power-down modes are supported by the MAX1204ACPP+?
The MAX1204ACPP+ supports three power-down states: hardware shutdown via SHDN pin (≤10µA), fast software power-down (30µA), and full software power-down (2µA). All modes retain configuration registers and allow wake-up via serial interface access or SHDN pin release.
MAX1204ACPP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
MAX1204ACPP+ FAQ
1.How can I place an order for MAX1204ACPP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1204ACPP+ 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 MAX1204ACPP+ reliable?
The price and inventory of MAX1204ACPP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1204ACPP+ is usually 5 days.
3.What payment methods are accepted for MAX1204ACPP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1204ACPP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1204ACPP+?
MAX1204ACPP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1204ACPP+ 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 MAX1204ACPP+?
For technical support, including MAX1204ACPP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1204ACPP+ requirements.
6.How does Aetrix verify that MAX1204ACPP+ is sourced from the original manufacturer or authorized distributors?
All MAX1204ACPP+ 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 MAX1204ACPP+ meets industry standards.
7.What is the process for return or replacement of MAX1204ACPP+?
All MAX1204ACPP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1204ACPP+, 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 MAX1204ACPP+ part is unused and in its original packaging.
Return procedure for MAX1204ACPP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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