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Analog Devices Inc./Maxim Integrated MAX1203AEAP
- Part No.:
- MAX1203AEAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1203AEAP.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,876
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Product details
Overview
MAX1203AEAP 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, ±0.5 LSB INL (A-grade), and operates from +5V analog supply with VL pin supporting 2.7V–3.6V logic levels - used in battery-powered medical instruments and high-accuracy process control.
For engineers reviewing the MAX1203AEAP datasheet, MAX1203AEAP pinout, MAX1203AEAP application, or MAX1203AEAP equivalent, this page delivers verified electrical specs, real-world timing behavior, power-down mode trade-offs, and interface compatibility with SPI/MICROWIRE/TMS320 DSPs - all confirmed for the AE grade in 20-pin SSOP package.
Technical Context
The MAX1203AEAP implements successive-approximation architecture with integrated track/hold, supporting both internal clock (1.7MHz) and external clock (up to 2MHz) conversion modes. Its pseudo-differential input structure enables 4-channel differential or 8-channel single-ended acquisition, with channel selection controlled via 3-bit address in an 8-bit serial command word.
It uses a buffered reference interface: REFADJ adjusts gain (±1.5%), while REF accepts external 4.096V reference (reference buffer disabled when REFADJ = VDD). The VL pin independently sets digital output swing (2.7V–3.6V), decoupling logic-level requirements from analog supply constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 1 part in 4096 full-scale precision |
| Sampling Rate | 133ksps - supports real-time monitoring of signals up to ~66kHz via Nyquist criterion |
| INL (A Grade) | ±0.5 LSB - ensures monotonicity and <0.012% full-scale linearity error across temperature |
| Supply Current (Op) | 1.5mA typical - enables low-power operation in portable instrumentation |
| Power-Down Current | 2μA (full) / 30μA (fast) - allows dynamic current scaling between conversions |
| Digital I/O Voltage Range | VL = 2.7V–3.6V - matches 3V microcontrollers without level-shifting circuitry |
| Reference Input | External 4.096V at REF pin - enables precise, stable full-scale definition independent of VDD |
Pinout & Package
MAX1203AEAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant and rated for -40°C to +85°C extended temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential inputs; input range = 0 to VREF (unipolar) or ±VREF/2 (bipolar) |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (single-supply) or -5V (dual-supply) - defines analog ground reference for bipolar mode |
| SHDN (Pin 10) | Three-Level Control Input | Low = full shutdown (2μA); open = external compensation; VDD = internal compensation - no external pull required |
| REF (Pin 11) | Reference Buffer Output / External Ref Input | When REFADJ = VDD, internal buffer disabled - accepts 4.096V external reference directly |
| REFADJ (Pin 12) | Reference Gain Adjustment | ±1.5% fine-tuning of reference gain; tie to VDD to disable buffer for external reference use |
| GND (Pin 13) | Analog Ground / IN- for SE mode | Common return for analog section; serves as IN- in single-ended conversions |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB high-level voltage (2.7V–3.6V) - enables direct interfacing with 3V logic |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge synchronized; high-impedance when CS = high |
| SSTRB (Pin 16) | Serial Strobe Output | Pulses high one SCLK period before MSB in external-clock mode - synchronizes DSP capture timing |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (START + SEL + UNI/BIP + SGL/DIF + PD1/PD0) on SCLK rising edge |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; DOUT/SSTRB enter high-Z state when CS = high |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing - 2MHz max frequency |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5% - powers analog core, track/hold, and reference buffer (when enabled) |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable unipolar/bipolar mode | Single control bit (UNI/BIP) selects 0–VREF or ±VREF/2 full-scale range - eliminates hardware reconfiguration |
| Flexible power management | Two software-selectable power-down modes (2μA or 30μA) plus automatic wake-on-CS - reduces average current in burst-sampling systems |
| 3V-compatible digital interface | VL pin sets DOUT/SSTRB output swing independently of VDD - enables direct connection to 3V µPs without level shifters |
| High-accuracy internal track/hold | 1.5μs acquisition time with 4.5MHz small-signal bandwidth - supports accurate digitization of fast transients |
| SPI/MICROWIRE/TMS320 compatibility | No external logic needed - CPOL=0/CPHA=0 SPI mode matches native timing; SSTRB provides DSP-ready strobe |
Applications
| Battery-Powered Medical Instruments | Industrial Process Monitoring |
|---|---|
Use Scenario: Portable ECG or blood glucose meter acquiring analog sensor outputs under tight power budgets. IC Role / Device Role / Timing Role: 12-bit ADC digitizing conditioned biopotential signals at 100–200Hz with low noise and calibrated offset matching. Use Value: 2μA full shutdown current extends battery life; VL = 3.3V enables direct interface with low-voltage MCU; ±0.5 LSB INL ensures clinical-grade measurement repeatability. | Use Scenario: PLC analog input module measuring temperature, pressure, and flow in factory automation. IC Role / Device Role / Timing Role: High-accuracy front-end ADC converting 4–20mA loop signals or thermocouple outputs with channel-to-channel matching. Use Value: ±0.1 LSB channel-to-channel offset matching improves multi-sensor consistency; bipolar mode supports negative process deviations; -40°C to +85°C rating ensures field reliability. |
| 5V/3V Mixed-Supply Data Acquisition | Embedded Test & Measurement Equipment |
Use Scenario: Compact DAQ board interfacing legacy 5V sensors with modern 3.3V SoCs or FPGAs. IC Role / Device Role / Timing Role: Bridge ADC providing isolated analog domain (5V) and digital domain (3.3V) with configurable logic levels. Use Value: Independent VL pin eliminates level-shifter ICs; 8-channel multiplexer reduces component count; SPI compatibility simplifies firmware integration. | Use Scenario: Handheld oscilloscope or signal analyzer capturing transient waveforms in field service tools. IC Role / Device Role / Timing Role: Medium-speed ADC with 133ksps sampling and 70dB SINAD for time-domain analysis of sub-100kHz signals. Use Value: 70dB SINAD and 80dB SFDR support clean spectral analysis; 1.5μs acquisition time enables accurate pulse capture; external clock mode allows precise trigger synchronization. |
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 interface, no differential mode, internal reference only, 8-pin SOIC | Lacks differential input and flexible power-down; suited for simpler single-ended systems | Choose ADS7822U when board space is critical and bipolar/differential capability is unnecessary |
| MAX11131ETE+ | 12-bit, 500ksps, internal reference, 10-pin μMAX, VL-independent 1.8V–3.6V I/O | Higher speed and smaller package but no external reference option or SHDN-controlled compensation modes | Choose MAX11131ETE+ for higher throughput and ultra-compact layout where external reference isn't required |
Compared with ADS7822U and MAX11131ETE+, the MAX1203AEAP uniquely combines external reference support, three-level SHDN control, differential input capability, and VL-adjustable 3V logic - making it optimal for precision mixed-supply industrial and medical DAQ where configurability and accuracy stability are prioritized over raw speed or footprint.
Availability
MAX1203AEAP is available at Aetrix Electronics and suitable for battery-powered medical instruments, industrial process monitoring, and 5V/3V mixed-supply data acquisition requiring stable component supply and long-term lifecycle support.
Supply support for MAX1203AEAP 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 MAX1203AEAP belongs to Maxim's high-accuracy serial ADC product line, engineered specifically for mixed-voltage systems where 3V digital logic must interface reliably with 5V analog signal chains without compromising linearity or power efficiency.
FAQ
What is the reference voltage configuration for MAX1203AEAP?
The MAX1203AEAP requires an external 4.096V reference applied to the REF pin. Unlike the MAX1202, it has no internal reference. The reference buffer is disabled by pulling REFADJ to VDD, allowing direct use of an external precision reference - a key design requirement confirmed for the MAX1203AEAP in its datasheet specifications and pin-function description.
Does MAX1203AEAP support differential input mode?
Yes, the MAX1203AEAP supports pseudo-differential input mode via its 8-channel multiplexer, selecting pairs CH0/CH1, CH2/CH3, CH4/CH5, or CH6/CH7. The control byte's SGL/DIF bit configures this mode, and the device samples the difference |IN+ − IN−| while maintaining IN− stability - a capability explicitly defined in Tables 3 and 4 and the "Detailed Description" section of the MAX1203AEAP datasheet.
What is the operating temperature range for MAX1203AEAP?
The MAX1203AEAP is specified for the extended temperature range of -40°C to +85°C. This is confirmed by the "Ordering Information" table identifying the 'E' grade suffix and the "Operating Temperature Ranges" section stating MAX1203_E_P covers -40°C to +85°C - matching the 'E' in MAX1203AEAP.
How does the VL pin affect MAX1203AEAP digital outputs?
Applying 2.7V–3.6V to the VL pin sets the high-level output voltage of DOUT and SSTRB, enabling direct interfacing with 3V logic families. VOH = VL − 0.5V (ISOURCE = 1mA), and VOL ≤ 0.4V (ISINK = 3mA) - parameters measured and guaranteed across the VL range per the MAX1203AEAP Electrical Characteristics table.
What power-down modes does MAX1203AEAP offer?
The MAX1203AEAP offers two software-selectable power-down modes via PD1/PD0 bits in the control byte: full power-down (2μA typical supply current) and fast power-down (30μA). Both modes retain register state and allow immediate wake-up on CS assertion - behavior documented in the "Power Requirements" table and "Control-Byte Format" section of the MAX1203AEAP datasheet.
MAX1203AEAP 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:
- Obsolete
- 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:
- -
MAX1203AEAP FAQ
1.How can I place an order for MAX1203AEAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1203AEAP 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 MAX1203AEAP reliable?
The price and inventory of MAX1203AEAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1203AEAP is usually 5 days.
3.What payment methods are accepted for MAX1203AEAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1203AEAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1203AEAP?
MAX1203AEAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1203AEAP 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 MAX1203AEAP?
For technical support, including MAX1203AEAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1203AEAP requirements.
6.How does Aetrix verify that MAX1203AEAP is sourced from the original manufacturer or authorized distributors?
All MAX1203AEAP 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 MAX1203AEAP meets industry standards.
7.What is the process for return or replacement of MAX1203AEAP?
All MAX1203AEAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1203AEAP, 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 MAX1203AEAP part is unused and in its original packaging.
Return procedure for MAX1203AEAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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