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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:3,199
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Product details
Overview
MAX1204BEAP+ 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 interface, and supports unipolar/bipolar input modes. It delivers 133ksps sampling rate with ±0.5 LSB INL and operates from single +5V or dual ±5V analog supplies.
For engineers reviewing the MAX1204BEAP+ datasheet, MAX1204BEAP+ pinout, MAX1204BEAP+ application, or MAX1204BEAP+ equivalent, this device is selected for low-power, high-accuracy data acquisition in battery-powered instruments, medical sensors, and industrial process control where 3V logic interfacing and flexible power-down modes are critical.
Technical Context
The MAX1204BEAP+ employs successive-approximation (SAR) architecture with integrated track/hold, enabling precise sampling of up to 8 single-ended or 4 pseudo-differential inputs. Its internal 4.096V reference and REFADJ-adjustable buffer simplify gain calibration while supporting both unipolar (0V to VREF) and bipolar (±VREF/2) full-scale ranges.
It features dual clocking modes: external SCLK-driven conversion (up to 2MHz, 15 clocks/conversion) or internal clock mode (10µs max conversion time), with SSTRB strobe output synchronized to conversion start/finish. Power management includes hard-wired SHDN and two software-selectable power-down states-fast (30µA) and full (2µA)-enabling sub-10µA average current at reduced sampling rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC with no missing codes over temperature |
| Sampling Rate | 133ksps maximum with 2MHz external clock and 15-clock cycle |
| INL / DNL | ±0.5 LSB integral nonlinearity; ±1.0 LSB differential nonlinearity |
| Reference | Internal 4.096V reference with ±0.8 ppm/°C tempco; externally adjustable via REFADJ |
| Supply Current | 1.5mA operating; 2µA full power-down; VL pin enables 2.7V–5.25V logic level selection |
| Input Configuration | 8-channel single-ended or 4-channel pseudo-differential; software-configurable unipolar/bipolar |
| Serial Interface | SPI/MICROWIRE/TMS320-compatible 4-wire interface; MSB-first, falling-edge data valid |
Pinout & Package
MAX1204BEAP+ is housed in a 20-pin SSOP package (body width 0.209", JEDEC MO-153), RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as single-ended inputs (to GND) or paired pseudo-differential inputs (e.g., CH0/CH1); input range: VSS to VDD |
| VSS (Pin 9) | Negative Supply | Accepts 0V (unipolar) or –5V ±5% (bipolar); defines common-mode baseline for differential mode |
| 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 | Supplies 4.096V nominal reference; disable internal buffer by tying REFADJ to VDD for external reference use |
| DOUT (Pin 15) | Serial Data Output | Three-state, MSB-first output clocked on SCLK falling edge; logic levels set by VL voltage |
| 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) and digital logic; requires low-impedance connection |
| REFADJ (Pin 12) | Reference Buffer Adjustment Input | Adjusts internal reference gain (±1.5% range); tie to VDD to disable buffer for external reference operation |
| 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; 40–60% duty cycle required |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; DOUT/SSTRB go high-impedance when CS is high (except in internal clock mode) |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (START, SEL2–0, SGL/DIF, UNI/BIP, PD1/PD0) on SCLK rising edge |
| SSTRB (Pin 16) | Serial Strobe Output | Indicates conversion progress: low during conversion (internal mode) or pulses before MSB (external mode) |
Key Features
| Feature | Design Value |
|---|---|
| Flexible Digital Interface | VL pin sets DOUT/SSTRB output swing (2.7V–5.25V), enabling seamless integration with 3V microcontrollers without level shifters |
| Configurable Input Modes | Software-selectable unipolar/bipolar and single-ended/differential operation via 8-bit control byte, supporting diverse sensor signal types |
| Low-Power Operation | 1.5mA active current and 2µA full power-down enable battery life extension in portable instrumentation |
| Integrated Precision Reference | On-chip 4.096V reference with ±0.8 ppm/°C drift and REFADJ trim simplifies system-level gain calibration and reduces BOM count |
| Robust Timing Architecture | Dual clock modes (internal/external) decouple conversion timing from host processor clock, improving noise immunity and scheduling flexibility |
Applications
| Battery-Powered Data Loggers | Medical Patient Monitoring Sensors |
|---|---|
Use Scenario: Portable ECG or pulse oximeter units acquiring analog biosignals with limited battery capacity and strict EMC constraints. IC Role / Device Role / Timing Role: 10-bit ADC digitizing conditioned analog front-end outputs; internal clock mode eliminates SCLK noise coupling into analog path. Use Value: 2µA shutdown current and 1.5mA active draw extend battery life; 4.096V reference ensures consistent 1mV/LSB scaling across temperature. |
Use Scenario: Multi-parameter bedside monitors measuring temperature, respiration, and blood pressure with isolated analog inputs. IC Role / Device Role / Timing Role: Central ADC handling 8 analog channels from isolated sensor conditioners; VL pin interfaces directly to 3.3V ARM Cortex-M host MCU. Use Value: Single +5V supply simplifies power design; ±0.5 LSB INL maintains diagnostic accuracy; software-configurable bipolar mode supports thermistor bridge outputs. |
| Industrial Process Control I/O Modules | Automated Test Equipment (ATE) Front Ends |
Use Scenario: DIN-rail mounted PLC analog input modules converting 4–20mA loop signals and thermocouple outputs in factory environments. IC Role / Device Role / Timing Role: High-accuracy ADC with programmable unipolar/bipolar ranges and robust input protection (±0.3V beyond rails). Use Value: 133ksps sampling supports fast loop response; channel-to-channel crosstalk < –75dB prevents cross-talk between adjacent 4–20mA channels. |
Use Scenario: Modular ATE digitizers requiring precise, repeatable measurements of DUT analog outputs under varying load conditions. IC Role / Device Role / Timing Role: Calibration-grade ADC with internal track/hold and low aperture jitter (<50ps) for undersampling high-frequency transients. Use Value: 70dB SFDR and 66dB SINAD support accurate spectral analysis; 1.5µs acquisition time accommodates high-Z source impedances up to 4kΩ. |
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, package, and interface; higher INL (±1 LSB) and lower sampling rate (66ksps) | Used where higher resolution outweighs speed loss-e.g., precision weight scales or calibration standards | Select MAX1202BEAP+ only if 12-bit resolution is mandatory and 66ksps suffices; verify REFADJ compatibility with existing layout |
| ADS7822U | 12-bit, 200ksps, SPI-only interface; no internal reference; requires external 2.5V reference and level-shifting for 3V logic | Preferred in cost-sensitive, high-speed designs where external reference and level translation are acceptable | Choose ADS7822U for higher throughput and lower unit cost; redesign required for reference and VL logic interface |
Compared with MAX1202BEAP+, the MAX1204BEAP+ trades 2 bits of resolution for double the sampling rate and tighter DC accuracy; versus ADS7822U, it offers integrated reference and VL-based 3V logic compatibility at the cost of lower speed and higher price.
Availability
MAX1204BEAP+ is available at Aetrix Electronics and suitable for battery-powered instruments, medical monitoring devices, 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, designed specifically for mixed-voltage systems needing low-power, high-accuracy ADCs with flexible digital interfacing and integrated reference solutions.
FAQ
What supply voltages does the MAX1204BEAP+ support?
The MAX1204BEAP+ operates from a single +5V ±5% analog supply (VDD) with optional –5V ±5% negative supply (VSS) for bipolar input ranges, and a separate VL pin (2.7V–5.25V) to set digital output logic levels. It does not require a dedicated 3V supply rail-the VL pin directly configures DOUT and SSTRB voltage thresholds, enabling native interfacing with 3V microcontrollers without external level shifters. VSS may be tied to GND for unipolar operation.
How does the MAX1204BEAP+ handle unipolar vs. bipolar input configurations?
The MAX1204BEAP+ selects unipolar or bipolar mode via the UNI/BIP bit (bit 3) in its 8-bit control byte: UNI/BIP = 1 configures 0V to VREF full-scale range; UNI/BIP = 0 configures –VREF/2 to +VREF/2. In unipolar mode, IN– is internally tied to GND; in bipolar mode, IN– connects to the selected negative channel (e.g., CH1 when CH0/CH1 pair is chosen). The internal 4.096V reference determines exact full-scale values, which can be adjusted via REFADJ.
What is the function of the SHDN pin on the MAX1204BEAP+?
The SHDN pin on the MAX1204BEAP+ provides three-level control: pulled low (≤0.8V), it forces full shutdown with ≤10µA supply current; left floating, it enables external compensation mode for the reference buffer (requires 4.7µF capacitor at REF); tied to VDD, it activates internal compensation mode (0µF at REF). Unlike simple enable/disable pins, SHDN directly affects reference stability and power state-no software command is needed to enter shutdown, making it ideal for rapid power cycling between conversions.
Can the MAX1204BEAP+ interface directly with a 3.3V microcontroller SPI port?
Yes-the MAX1204BEAP+ interfaces directly with 3.3V microcontrollers via its VL pin: applying 3.3V to VL sets DOUT and SSTRB high-level output to ~3.3V (with VOL ≤0.4V), meeting 3.3V CMOS input thresholds. Its digital inputs (DIN, SCLK, CS, SHDN) tolerate 0–VDD logic levels and are compatible with 3.3V drive strength. No level-shifting circuitry is required, and the 4-wire SPI/MICROWIRE interface uses standard CPOL=0/CPHA=0 timing, confirmed in the MAX1204BEAP+ datasheet Figure 6 and Table 2.
What is the maximum achievable sampling rate for the MAX1204BEAP+?
The MAX1204BEAP+ achieves a maximum sampling rate of 133ksps when using a 2.0MHz external SCLK in 15-clock conversion mode (133,333 samples per second = 2,000,000 ÷ 15). This rate assumes continuous conversion with no idle time between control-byte writes. In internal clock mode, conversion completes in ≤10µs, but effective throughput depends on host readout speed-SCLK may run up to 2MHz to retrieve results, though total cycle time (acquisition + conversion + readout) must stay under 120µs to prevent T/H droop-induced errors.
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:
- 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:
- -
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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