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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:3,945
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Product details
Overview
MAX1204AEPP+ from Maxim Integrated is a 10-bit, 8-channel serial analog-to-digital converter optimized 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. It delivers 133ksps sampling rate with ±0.5 LSB INL and operates across –40°C to +85°C.
For engineers reviewing the MAX1204AEPP+ datasheet, MAX1204AEPP+ pinout, MAX1204AEPP+ application, or MAX1204AEPP+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-chain support for industrial data acquisition, medical instrumentation, and battery-powered embedded systems.
Technical Context
The MAX1204AEPP+ uses successive-approximation architecture with integrated track/hold circuitry, enabling precise sampling of single-ended (8-channel) or pseudo-differential (4-channel) inputs. Its internal reference buffer (gain = 1.68) and REFADJ pin allow fine gain trim, while VL pin sets digital output logic levels from 2.7V to 5.25V independently of VDD.
It supports dual clocking modes: external SCLK (up to 2MHz, 15-cycle conversion) or internal clock (fixed ~1.7MHz), with SSTRB strobe synchronized to conversion start/end. Power management includes 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 - delivers 1024 discrete output codes for medium-precision measurement applications. |
| Sampling Rate | 133ksps - enables real-time monitoring of signals up to ~800kHz full-power bandwidth. |
| INL | ±0.5 LSB - ensures monotonicity and <0.05% full-scale linearity error after calibration. |
| Reference | Internal 4.096V ±0.5% - simplifies system BOM by eliminating external reference ICs; adjustable via REFADJ. |
| Supply Current | 1.5mA operating / 2µA full power-down - supports low-power operation in portable and energy-sensitive designs. |
| Digital Interface | SPI/MICROWIRE/TMS320 4-wire serial - interoperates directly with common microcontrollers without level-shifting or glue logic. |
| Input Range | Single-ended: 0V to VREF; Differential: ±VREF/2 - configurable for both unipolar sensor outputs and bipolar transducer signals. |
Pinout & Package
MAX1204AEPP+ is housed in a 20-pin plastic DIP (PDIP) package with 0.300-inch body width, RoHS-compliant and lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 (CH0–CH7) | Analog Input Channels | Selectable as single-ended inputs or paired differential inputs (CH0/CH1, CH2/CH3, etc.) via control byte. |
| 9 (VSS) | Negative Supply Rail | Accepts 0V (unipolar) or –5V ±5% (bipolar); defines analog ground reference for differential mode. |
| 10 (SHDN) | Three-Level Shutdown Control | Low = 10µA shutdown; float = external REF compensation; VDD = internal REF compensation. |
| 11 (REF) | Reference Buffer Output / ADC Reference Input | Provides 4.096V nominal output; used as ADC reference when internal REF enabled. |
| 12 (REFADJ) | Reference Buffer Gain Adjustment | Tie to GND for default 4.096V; tie to VDD to disable buffer for external reference use. |
| 13 (GND) | Analog Ground / IN– for Single-Ended Mode | Common return for analog signals; serves as negative input in single-ended conversions. |
| 14 (VL) | Digital Output Supply | Sets DOUT/SSTRB logic high level (2.7V–5.25V); enables direct interfacing with 3V/3.3V/5V controllers. |
| 15 (DOUT) | Serial Data Output | Three-state MSB-first output; active only when CS is low; timing referenced to SCLK falling edge. |
| 16 (SSTRB) | Serial Strobe Output | Indicates conversion progress: low during conversion (internal clock) or pulses before MSB (external clock). |
| 17 (DIN) | Serial Data Input | Accepts 8-bit control byte defining channel, mode (unipolar/bipolar), clock source, and power state. |
| 18 (CS) | Active-Low Chip Select | Enables serial interface; high = DOUT/SSTRB in high-impedance state; required for all transactions. |
| 19 (SCLK) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; supports up to 2MHz with 40–60% duty cycle. |
| 20 (VDD) | Positive Analog Supply | +5V ±5% - powers analog core, track/hold, and reference; independent of digital logic supply VL. |
Key Features
| Feature | Design Value |
|---|---|
| User-adjustable digital output voltage | VL pin accepts 2.7V–5.25V to set DOUT/SSTRB logic-high level-eliminates need for external level shifters with 3V µPs. |
| Configurable unipolar/bipolar input mode | Software-selectable via control byte bit UNI/BIP-supports both 0–4.096V sensor outputs and ±2.048V transducer signals. |
| Internal track/hold with 1.5µs acquisition time | Reduces external anti-aliasing filter complexity; supports source impedances ≤4kΩ without AC performance loss. |
| Two software power-down modes | Fast (30µA) and full (2µA) shutdown-enables dynamic power scaling between conversions to extend battery life. |
| Pseudo-differential architecture | Uses single-ended sampling with stable IN– reference-simplifies layout vs true differential ADCs while retaining noise rejection benefits. |
Applications
| Industrial Process Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Continuous analog signal digitization from temperature, pressure, and flow sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Primary ADC for 8-sensor multiplexed acquisition; interfaces to 3.3V ARM Cortex-M MCU via SPI. Use Value: Internal 4.096V reference and VL-controlled 3.3V outputs eliminate external reference and level-shifter components, reducing BOM cost and board area. |
Use Scenario: Battery-powered ECG or pulse oximeter front-end acquiring biopotential signals with low noise and high DC accuracy. IC Role / Device Role / Timing Role: 10-bit ADC with pseudo-differential inputs and programmable bipolar range for artifact-resistant signal capture. Use Value: 2µA full power-down mode extends runtime between charges; 133ksps sampling supports Nyquist-compliant 50kHz bandwidth. |
| 5V/3V Mixed-Supply Data Loggers | Battery-Powered Test Equipment |
|
Use Scenario: Field-deployable environmental logger using +5V analog sensors and +3.3V wireless SoC for data transmission. IC Role / Device Role / Timing Role: Bridge between legacy 5V analog subsystems and modern 3.3V digital processors via flexible VL and dual-supply operation. Use Value: Independent VDD (+5V) and VL (3.3V) rails enable clean separation of analog and digital power domains, minimizing supply coupling noise. |
Use Scenario: Handheld multimeter or oscilloscope probe interface digitizing DC/AC signals up to 100kHz with calibrated accuracy. IC Role / Device Role / Timing Role: Precision ADC with ±0.5 LSB INL and internal reference-reduces calibration overhead and improves long-term stability. Use Value: On-chip track/hold and 4.5MHz small-signal bandwidth support accurate transient capture without external sample-hold ICs. |
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, identical pinout and serial interface; higher INL (±1 LSB), same 133ksps rate and power profile. | Required where >10-bit precision is needed without changing PCB layout or firmware interface. | Select MAX1202ACPP+ when resolution upgrade is prioritized over minimal BOM change; no layout revision needed. |
| ADS7822U | 12-bit, SPI-only (no MICROWIRE/TMS320), 200ksps, 2.7–5.25V single supply, no internal reference-requires external REF and level translation for 3V logic. | Suitable for new designs targeting higher speed and lower supply flexibility, but increases external component count. | Choose ADS7822U for greenfield projects needing faster throughput and simpler supply scheme, accepting added reference and level-shift complexity. |
Compared with MAX1204AEPP+, MAX1202ACPP+ offers drop-in 12-bit resolution with identical footprint and interface, while ADS7822U trades pin compatibility for higher speed and single-supply operation-requiring redesign of reference and logic-level circuitry.
Availability
MAX1204AEPP+ is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, and battery-powered test equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).
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) is a semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX1204AEPP+ belongs to Maxim's precision data-acquisition ADC family, designed specifically for mixed-voltage embedded systems requiring low power, integrated references, and seamless 3V/5V interoperability.
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 industrial and automotive-adjacent applications where ambient conditions exceed commercial-grade limits. This rating is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section under "Operating Temperature Ranges" for MAX1204_E_P grade.
Does the MAX1204AEPP+ require an external reference voltage?
No, the MAX1204AEPP+ includes an internal 4.096V reference with buffer amplifier and REFADJ pin for gain trimming. External reference use is optional-achieved by disabling the internal buffer (pulling REFADJ to VDD) and applying a stable voltage to the REF pin. The internal reference eliminates BOM cost and layout complexity in most applications.
How does the VL pin affect digital interface compatibility in the MAX1204AEPP+?
The VL pin on the MAX1204AEPP+ directly sets the high-level output voltage of DOUT and SSTRB, supporting 2.7V to 5.25V logic. When VL = 3.3V, the MAX1204AEPP+ drives standard 3.3V CMOS logic without level shifters-critical for interfacing with modern low-voltage microcontrollers while maintaining full 5V analog supply headroom.
Can the MAX1204AEPP+ operate with only a +5V supply, or does it require dual ±5V rails?
The MAX1204AEPP+ operates with either a single +5V analog supply (VDD = +5V, VSS = GND) for unipolar inputs or dual ±5V supplies (VDD = +5V, VSS = –5V) for bipolar operation. The datasheet explicitly states "Operates from +5V Single or ±5V Dual Supplies", and the absolute maximum ratings confirm VSS tolerance down to –6V.
What power-down modes are supported by the MAX1204AEPP+, and how are they activated?
The MAX1204AEPP+ supports three power-down states: hardware shutdown (SHDN pin low → 10µA), fast software power-down (PD1/PD0 = 01 → 30µA), and full software power-down (PD1/PD0 = 00 → 2µA). All modes retain register state and resume instantly upon wake-up; access to the serial interface automatically powers up the device from any software mode.
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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