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Analog Devices Inc./Maxim Integrated MAX1204AEPP
- Part No.:
- MAX1204AEPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1204AEPP.pdf
- Description:
- IC ADC 10BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
The MAX1204AEPP 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 internal track/hold, 4.096V reference with buffer, SPI/MICROWIRE/TMS320-compatible 4-wire serial interface, and supports unipolar/bipolar input modes. It delivers 133ksps sampling rate with ±0.5 LSB INL and operates in extended temperature range (–40°C to +85°C) for industrial data acquisition.
For engineers reviewing the MAX1204AEPP datasheet, MAX1204AEPP pinout, MAX1204AEPP application, or MAX1204AEPP equivalent, key selection criteria include its dual-supply flexibility (+5V analog / 2.7V–5.25V VL), software-configurable power-down modes (<10µA shutdown current), 8-channel single-ended or 4-channel differential input capability, and compatibility with 3V microprocessors via VL-adjustable logic levels.
Technical Context
The MAX1204AEPP employs successive-approximation architecture with integrated track/hold circuitry, enabling precise sampling of analog signals up to 4.5MHz small-signal bandwidth. Its internal 4.096V reference and REFADJ pin allow gain trim without external components, while the VL pin decouples digital output voltage level (2.7V–5.25V) from VDD.
It supports two clock modes: external SCLK-driven conversion (up to 2MHz, 15 clocks/conversion) or internal clock mode for processor-flexible readout. Power management includes hard-wired SHDN and two software-selectable power-down states-fast (30µA) and full (2µA)-with automatic wake-up on serial interface access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes over full-scale input range |
| Sampling Rate | 133ksps - enables real-time monitoring of fast transients in process control loops |
| INL | ±0.5 LSB - ensures high linearity for precision measurement without calibration |
| Supply Current (Operating) | 1.5mA - low active power supports battery-powered instrumentation |
| Shutdown Current | 2µA - ultra-low quiescent draw extends runtime between conversions |
| Reference Voltage | 4.096V internal - matches standard 10-bit full-scale resolution (2¹⁰ = 1024) |
| Digital I/O Voltage Range | VL = 2.7V to 5.25V - allows direct interfacing with 3V, 3.3V, or 5V logic families |
| Temperature Range | –40°C to +85°C - qualified for extended industrial and medical environments |
Pinout & Package
MAX1204AEPP 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 per ordering code suffix '+'.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential inputs; common-mode range spans VSS to VDD |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (unipolar) or –5V (bipolar) to enable dual-supply operation |
| SHDN (Pin 10) | Three-Level Shutdown Control | Pull low → 10µA shutdown; float → external REF compensation; tie to VDD → internal compensation |
| REF (Pin 11) | Reference Buffer Output / ADC Reference Input | Provides 4.096V nominal output; disable buffer by pulling REFADJ to VDD for external reference use |
| REFADJ (Pin 12) | Reference-Buffer Gain Adjustment | Allows fine-tuning of internal reference; tie to VDD to disable buffer amplifier |
| GND (Pin 13) | Analog/Digital Ground Reference | Common return for analog inputs and digital logic; serves as IN– in single-ended mode |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB logic-high level (2.7V–5.25V); isolates digital interface from analog VDD |
| DOUT (Pin 15) | Serial Data Output | Three-state MSB-first output synchronized to SCLK falling edge; high-impedance when CS = high |
| SSTRB (Pin 16) | Serial Strobe Output | Indicates conversion status: pulses high before MSB in external clock mode; goes low→high in internal clock mode |
| CS (Pin 17) | Active-Low Chip Select | Enables serial interface and output drivers; must be low during data transfer |
| DIN (Pin 18) | Serial Data Input | Accepts 8-bit control byte on SCLK rising edge to configure channel, mode, and clock/power settings |
| SCLK (Pin 19) | Serial Clock Input | Drives data shift-in/out and controls conversion timing in external clock mode (40–60% duty cycle required) |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5% main analog rail; powers internal reference, T/H, and SAR core |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with flexible input configuration | Supports both 8 single-ended and 4 pseudo-differential channel pairs (CH0/CH1, CH2/CH3, etc.) |
| User-adjustable digital output voltage level | VL pin sets DOUT/SSTRB swing independently from VDD (2.7V–5.25V), enabling safe 3V µP interfacing |
| Internal track/hold with 1.5µs acquisition time | Minimizes external component count; tACQ defined by source impedance and 16pF hold capacitor |
| Two software-selectable power-down modes | Fast (30µA) and full (2µA) shutdown reduce average current in burst-sampling applications |
| SPI/MICROWIRE/TMS320-compatible serial interface | 4-wire protocol requires no glue logic; supports CPOL=0/CPHA=0 SPI configuration |
| Internal 4.096V reference with buffer amplifier | Eliminates need for external reference IC; REFADJ allows ±1.5% adjustment for system-level gain calibration |
Applications
| Industrial Process Monitoring | Portable Medical Instrumentation |
|---|---|
Use Scenario: Continuous analog signal acquisition from multiple sensors (temperature, pressure, flow) in PLC-based control cabinets. IC Role / Device Role / Timing Role: 10-bit ADC front-end with 8-channel MUX and internal T/H, providing synchronized sampling across sensor inputs. Use Value: Enables compact, low-power data acquisition without external reference or level-shifting circuitry, reducing BOM cost and board space. |
Use Scenario: Battery-powered ECG or pulse oximeter requiring low-noise, multi-channel analog digitization at clinical-grade accuracy. IC Role / Device Role / Timing Role: Precision ADC with <2µA shutdown current and 133ksps throughput, supporting intermittent sampling to extend battery life. Use Value: Delivers ±0.5 LSB INL and 66dB SINAD within tight power budget, meeting IEC 60601-2-27 ECG accuracy requirements. |
| Automotive Diagnostic Equipment | Test & Measurement Front-Ends |
Use Scenario: Handheld OBD-II scanner capturing analog signals from vehicle subsystems (coolant temp, throttle position, oxygen sensors). IC Role / Device Role / Timing Role: Mixed-voltage ADC interfacing 5V automotive sensors to 3.3V microcontroller via VL-controlled outputs. Use Value: Eliminates level translators; wide –40°C to +85°C operating range ensures reliability under hood temperature extremes. |
Use Scenario: Modular data logger acquiring waveforms from lab instruments (oscilloscopes, function generators) with variable input ranges. IC Role / Device Role / Timing Role: Configurable unipolar/bipolar input mode and software-selectable clocking support diverse signal types and timing constraints. Use Value: Internal 4.096V reference and ±0.1 LSB channel-to-channel offset matching ensure consistent cross-channel measurement fidelity. |
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), identical power-down and VL features | Requires higher-precision signal chains where 12-bit resolution justifies added cost and SNR trade-off | Select MAX1202ACPP+ only when system accuracy demands >10-bit quantization without external oversampling |
| ADS7822U | 12-bit, SPI-only interface; no internal reference; requires external 2.5V reference; 2.7V–5.25V supply; 200ksps max | Lacks bipolar mode and integrated reference; better suited for high-speed, reference-flexible designs with existing precision reference infrastructure | Choose ADS7822U when external reference control is preferred and unipolar-only operation suffices |
Compared with MAX1204AEPP, MAX1202ACPP+ offers higher resolution but slightly degraded linearity and identical packaging, while ADS7822U trades internal reference and bipolar capability for higher speed and SPI simplicity-making MAX1204AEPP optimal for mixed-supply, self-contained, low-power industrial sensing.
Availability
MAX1204AEPP is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, and automotive diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1204AEPP 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 and mixed-signal ICs for industrial, medical, and communications applications, emphasizing integration, low power, and robust performance.
The MAX1204AEPP belongs to Maxim's serial ADC product line, engineered specifically for mixed-voltage systems where 3V digital logic interfaces with 5V analog signal conditioning-targeting compact, low-power data acquisition in harsh environments.
FAQ
What is the operating temperature range for the MAX1204AEPP?
The MAX1204AEPP is specified for the extended temperature range of –40°C to +85°C, making it suitable for deployment in industrial enclosures, automotive under-hood environments, and portable medical devices exposed to ambient thermal variation. This rating is confirmed in the Absolute Maximum Ratings table and applies across all electrical specifications including INL, sampling rate, and reference stability.
Does the MAX1204AEPP require an external reference, or does it have an internal one?
The MAX1204AEPP includes an internal 4.096V reference with buffer amplifier, eliminating the need for an external reference in most applications. The REFADJ pin allows ±1.5% adjustment for system-level gain calibration. To use an external reference, disable the internal buffer by tying REFADJ to VDD and applying the reference voltage to the REF pin.
How does the VL pin affect digital interface compatibility in the MAX1204AEPP?
The VL pin on the MAX1204AEPP sets the high-level output voltage for DOUT and SSTRB, supporting 2.7V–5.25V logic levels independent of VDD. This allows direct connection to 3V microcontrollers without level shifters, prevents overvoltage damage to 3.3V I/O, and maintains noise margin when interfacing with mixed-voltage systems-critical for reliable SPI/MICROWIRE communication.
Can the MAX1204AEPP operate with a single +5V supply, or does it require dual supplies?
The MAX1204AEPP supports both configurations: a single +5V analog supply (VDD = +5V, VSS = GND) for unipolar input operation, or dual ±5V supplies (VDD = +5V, VSS = –5V) for true bipolar input ranges. The device automatically adapts its input range and reference behavior based on VSS connection and UNI/BIP bit setting in the control byte.
What power-down modes does the MAX1204AEPP support, and how are they activated?
The MAX1204AEPP provides three power-down states: hardware shutdown via SHDN pin (≤10µA), and two software-selectable modes controlled by PD1/PD0 bits in the control byte-fast power-down (30µA) and full power-down (2µA). All modes retain register state and resume operation automatically upon next serial interface access, enabling energy-efficient burst-sampling architectures.
MAX1204AEPP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1204AEPP FAQ
1.How can I place an order for MAX1204AEPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1204AEPP 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 MAX1204AEPP reliable?
The price and inventory of MAX1204AEPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1204AEPP is usually 5 days.
3.What payment methods are accepted for MAX1204AEPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1204AEPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1204AEPP?
MAX1204AEPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1204AEPP 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 MAX1204AEPP?
For technical support, including MAX1204AEPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1204AEPP requirements.
6.How does Aetrix verify that MAX1204AEPP is sourced from the original manufacturer or authorized distributors?
All MAX1204AEPP 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 MAX1204AEPP meets industry standards.
7.What is the process for return or replacement of MAX1204AEPP?
All MAX1204AEPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1204AEPP, 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 MAX1204AEPP part is unused and in its original packaging.
Return procedure for MAX1204AEPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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