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Analog Devices Inc./Maxim Integrated MAX1203BEAP+
- Part No.:
- MAX1203BEAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1203BEAP+.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:686
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Product details
Overview
The MAX1203BEAP+ from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) designed for mixed 5V analog / 3V digital supply systems. It features single-ended or differential input configuration, 133ksps sampling rate, ±1 LSB INL accuracy, and operates from single +5V or dual ±5V analog supplies with user-adjustable digital output logic levels via the VL pin. It is used in battery-powered instrumentation requiring low-power, high-accuracy data acquisition.
For engineers reviewing the MAX1203BEAP+ datasheet, MAX1203BEAP+ pinout, MAX1203BEAP+ application, or MAX1203BEAP+ equivalent, this page delivers verified technical context, real-world interface constraints (e.g., SPI/MICROWIRE/TMS320 compatibility, 2MHz serial clock limit), power-down behavior (2μA full shutdown), reference handling (external 4.096V required), and package-specific thermal derating (SSOP, 8.00mW/°C).
Technical Context
The MAX1203BEAP+ employs successive-approximation architecture with integrated track/hold, supporting both internal and external clock modes. Its analog front-end accepts 8 single-ended or 4 pseudo-differential inputs, with common-mode range from VSS to VDD and input protection clamping to (VSS − 0.3V) and (VDD + 0.3V).
Digital interface compliance includes SPI (CPOL = 0, CPHA = 0), MICROWIRE, and TMS320-family DSPs via SSTRB strobe. The VL pin sets DOUT/SSTRB output swing (2.7V–5.25V), enabling direct interfacing with 3V, 3.3V, or 5V logic without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale range for precision measurement |
| Sampling Rate | 133ksps - supports real-time monitoring of signals up to ~66kHz under Nyquist criterion |
| INL (Max) | ±1 LSB - ensures monotonicity and <0.025% end-point linearity error across temperature |
| Supply Current (Op) | 1.5mA - enables operation in low-power embedded systems with tight thermal budgets |
| Supply Current (PD) | 2μA - allows deep sleep between conversions to extend battery life in portable instruments |
| Reference Requirement | External 4.096V - mandates stable, low-noise reference source; REFADJ pin enables gain trim |
| Serial Clock Max | 2MHz - defines minimum conversion time of 6μs (12 clocks @ 2MHz) and limits PCB trace length |
| Input Configuration | 8 SE or 4 pseudo-diff - supports flexible sensor interfacing while maintaining channel-to-channel offset matching ≤0.1 LSB |
Pinout & Package
The MAX1203BEAP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, rated for −40°C to +85°C extended temperature operation and RoHS-compliant lead-free finish (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Selectable as 8 single-ended or 4 differential pairs; input voltage range depends on REF and mode (unipolar/bipolar) |
| VSS | Negative Supply Rail | Accepts 0V (GND) or −5V ±5%; sets bipolar input range center point and common-mode baseline |
| SHDN | Three-Level Shutdown Control | Low = 10μA shutdown; open = external compensation mode; VDD = internal compensation mode |
| REF | Reference Buffer Output / ADC Reference Input | Must be driven with 4.096V external reference; disabling buffer requires REFADJ = VDD |
| REFADJ | Reference-Buffer Gain Adjustment | Tie to VDD to disable internal buffer; otherwise enables ±1.5% gain trim for external reference calibration |
| GND | Analog Ground / IN− for SE mode | Primary return path; serves as IN− in single-ended conversions; must be star-connected for noise immunity |
| VL | Digital Output Supply | Sets DOUT/SSTRB logic high level (2.7V–5.25V); decouples digital I/O from analog supply noise |
| DOUT | Serial Data Output | MSB-first, SCLK-falling-edge aligned; high-impedance when CS = high; sinks up to 6mA |
| SSTRB | Serial Strobe Output | Pulses high for one SCLK period before MSB in external clock mode; synchronizes DSP capture timing |
| DIN | Serial Data Input | Accepts 8-bit control byte (START, SELx, UNI/BIP, SGL/DIF, PD1/PD0); CMOS-compatible thresholds |
| CS | Active-Low Chip Select | Enables serial interface and powers up device; must remain low during full 15-clock conversion cycle |
| SCLK | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; 40–60% duty cycle required |
| VDD | Positive Analog Supply | +5V ±5%; powers analog core, track/hold, and reference buffer; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with track/hold | Enables sequential sampling of multiple sensors without external sample-hold circuitry or timing coordination |
| Software-configurable unipolar/bipolar mode | Supports both 0–VREF and ±VREF/2 input ranges via control byte bit UNI/BIP, simplifying signal conditioning design |
| Three power-down modes | Full (2μA), fast (30μA), and internal-clock (10μA) modes allow granular energy management per sampling interval |
| SPI/MICROWIRE/TMS320-compatible interface | Eliminates need for protocol translation logic; direct connection to microcontrollers and DSPs reduces BOM count |
| User-adjustable digital output levels (VL pin) | Permits native 3V logic interfacing without level shifters, reducing layout complexity and EMI risk |
| Channel-to-channel offset matching ≤0.1 LSB | Ensures consistent baseline across channels for multi-sensor differential measurements without per-channel calibration |
Applications
| Battery-Powered Instrumentation | Medical Instrumentation |
|---|---|
Use Scenario: Portable blood glucose meters or handheld ECG monitors operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Primary ADC digitizing analog sensor outputs (e.g., photodiode current, electrode voltage) with low quiescent current and precise 12-bit resolution. Use Value: 2μA full power-down current extends battery life; 133ksps sampling captures transient physiological waveforms; VL pin enables direct 3.3V MCU interface. |
Use Scenario: Patient-worn vital sign monitors measuring respiration, pulse oximetry, or bioimpedance. IC Role / Device Role / Timing Role: High-accuracy, low-noise ADC acquiring conditioned analog signals from transducers with minimal self-heating. Use Value: ±1 LSB INL ensures diagnostic-grade linearity; 8-channel mux supports multi-parameter sensing; extended −40°C to +85°C rating covers clinical environments. |
| High-Accuracy Process Control | 5V/3V Mixed-Supply Industrial Systems |
Use Scenario: PLC analog input modules measuring temperature, pressure, or flow in factory automation. IC Role / Device Role / Timing Role: Precision ADC converting industrial sensor outputs (e.g., 4–20mA loops via shunt) into digital values for closed-loop control. Use Value: Channel-to-channel offset matching ≤0.1 LSB enables ratiometric measurements; bipolar mode supports ±10V industrial standards. |
Use Scenario: Embedded controllers integrating legacy 5V analog sensors with modern 3.3V or 3V microcontrollers. IC Role / Device Role / Timing Role: Bridge ADC providing galvanically isolated signal chain compatibility between disparate voltage domains. Use Value: Independent VL supply decouples digital I/O from analog rails; 5V analog supply maintains SNR while 3V logic reduces MCU power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, SPI-only, internal reference only, 8-pin SOIC | Lacks differential input support, no VL pin, lower sampling rate but smaller footprint | Prefer for space-constrained designs where unipolar single-ended inputs suffice and external reference is undesirable |
| MAX11131ETE+ | 12-bit, 500ksps, SPI/MICROWIRE, internal reference, 16-pin TQFN, 1.8V–3.6V VL range | Higher speed, lower voltage digital interface, no negative supply support, different pinout | Choose when >200ksps sampling or ultra-low-voltage logic interface is required; not suitable for ±5V analog operation |
Compared with the MAX1203BEAP+, the ADS7822U offers simpler integration but sacrifices differential capability and flexible logic-level control, while the MAX11131ETE+ delivers higher throughput and lower VL range at the cost of analog supply flexibility and pin compatibility.
Availability
The MAX1203BEAP+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, medical devices, industrial process control, and mixed-voltage embedded systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1203BEAP+ 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 MAX1202/MAX1203 product line was engineered for precision data acquisition in mixed-supply environments, emphasizing low power, software-configurable interfaces, and robust analog front-end performance across extended temperature ranges.
FAQ
What is the reference requirement for the MAX1203BEAP+?
The MAX1203BEAP+ requires an external 4.096V reference applied to the REF pin. Unlike the MAX1202 variant, it does not include an internal reference. The REFADJ pin must be tied to VDD to disable the internal reference buffer, ensuring accurate external reference coupling. This configuration is explicitly specified in the datasheet's Electrical Characteristics table for MAX1203 devices.
Does the MAX1203BEAP+ support differential input mode?
Yes, the MAX1203BEAP+ supports pseudo-differential input mode using CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7 channel pairs. In this mode, the device samples the voltage difference between two inputs, with IN− held stable relative to GND. The SGL/DIF bit in the control byte selects differential operation, and Tables 3 and 4 in the datasheet define valid channel pairings for the MAX1203BEAP+.
What is the function of the VL pin on the MAX1203BEAP+?
The VL pin on the MAX1203BEAP+ supplies power to the digital output drivers (DOUT and SSTRB), setting their logic-high voltage level between 2.7V and 5.25V. This allows direct interfacing with 3V, 3.3V, or 5V logic families without external level shifters. The datasheet specifies VOL and VOH values dependent on VL, confirming its role as a dedicated I/O supply rail distinct from VDD and VSS.
How does power-down work on the MAX1203BEAP+?
The MAX1203BEAP+ offers three software-selectable power-down modes controlled by PD1/PD0 bits in the control byte: full power-down (2μA), fast power-down (30μA), and internal clock mode (10μA). Accessing the serial interface automatically powers up the device. The SHDN pin provides hardware shutdown to ≤10μA, and all modes preserve register state except full power-down, which resets internal logic upon wake-up.
Is the MAX1203BEAP+ compatible with SPI and TMS320 processors?
Yes, the MAX1203BEAP+ is fully compatible with SPI (CPOL = 0, CPHA = 0), MICROWIRE, and TMS320-family DSPs. Its 4-wire serial interface uses SCLK, DIN, DOUT, and CS, with SSTRB providing a strobe synchronized to conversion completion. The datasheet confirms direct connection capability without external logic, and timing diagrams validate interoperability with standard SPI master peripherals.
MAX1203BEAP+ 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:
- 12
- 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
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1203BEAP+ FAQ
1.How can I place an order for MAX1203BEAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1203BEAP+ 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 MAX1203BEAP+ reliable?
The price and inventory of MAX1203BEAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1203BEAP+ is usually 5 days.
3.What payment methods are accepted for MAX1203BEAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1203BEAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1203BEAP+?
MAX1203BEAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1203BEAP+ 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 MAX1203BEAP+?
For technical support, including MAX1203BEAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1203BEAP+ requirements.
6.How does Aetrix verify that MAX1203BEAP+ is sourced from the original manufacturer or authorized distributors?
All MAX1203BEAP+ 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 MAX1203BEAP+ meets industry standards.
7.What is the process for return or replacement of MAX1203BEAP+?
All MAX1203BEAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1203BEAP+, 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 MAX1203BEAP+ part is unused and in its original packaging.
Return procedure for MAX1203BEAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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