My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1203BCPP+
- Part No.:
- MAX1203BCPP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1203BCPP+.pdf
- Description:
- IC ADC 12BIT 8CH 20-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,089
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1203BCPP+ 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 integral nonlinearity, and operates from single +5V or dual ±5V analog supplies with user-adjustable 2.7V–5.25V 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 MAX1203BCPP+ datasheet, MAX1203BCPP+ pinout, MAX1203BCPP+ application, or MAX1203BCPP+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for industrial and medical embedded designs.
Technical Context
The MAX1203BCPP+ employs successive-approximation architecture with integrated track/hold, supporting unipolar (0 to VREF) or bipolar (±VREF/2) input ranges. Its 4-wire SPI/MICROWIRE-compatible serial interface operates up to 2MHz and directly interfaces with TMS320-family DSPs via SSTRB strobe output.
It requires an external 4.096V reference applied to the REF pin and uses a reference-buffer amplifier (disabled by pulling REFADJ to VDD). Power management includes two software-selectable power-down modes-fast (30µA) and full (2µA)-with automatic wake-up on serial interface access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.0244% of full-scale range for precise measurement resolution. |
| Sampling Rate | 133ksps - supports real-time monitoring of fast transients in process control and medical sensors. |
| INL (Max) | ±1 LSB - ensures monotonicity and ≤0.024% end-point linearity error across temperature. |
| Supply Current (Op) | 1.5mA - enables operation in low-power embedded systems without thermal derating. |
| Power-Down Current | 2µA - allows microamp-level sleep between conversions in battery-powered instruments. |
| Digital I/O Voltage Range | 2.7V–5.25V (via VL pin) - permits direct interfacing with 3V, 3.3V, or 5V logic without level shifters. |
| Analog Input Config | 8 single-ended or 4 pseudo-differential channels - provides flexible signal routing for multi-sensor DAQ systems. |
Pinout & Package
MAX1203BCPP+ is housed in a 20-pin plastic DIP (PDIP) package with 0.3-inch body width, RoHS-compliant and lead(Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as single-ended inputs or paired differential inputs (e.g., CH0/CH1); common-mode range spans VSS to VDD. |
| VSS (Pin 9) | Negative Analog Supply | Accepts 0V (ground) or –5V ±5%; defines bipolar input range and sets reference for negative rail. |
| SHDN (Pin 10) | Three-Level Shutdown Control | Low = full shutdown (≤10µA); open = external compensation mode; VDD = internal compensation mode. |
| REF (Pin 11) | Reference Input / Buffer Output | Receives external 4.096V reference; internal buffer disabled when REFADJ = VDD per datasheet. |
| REFADJ (Pin 12) | Reference Buffer Adjustment | Pull to VDD to disable internal buffer; otherwise enables gain trim for external reference accuracy. |
| GND (Pin 13) | Analog Ground / IN– for SE mode | Common return for analog circuitry; serves as IN– in single-ended conversion mode. |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB logic-high level (2.7V–5.25V); enables interoperability with mixed-voltage digital systems. |
| DOUT (Pin 15) | Serial Data Output | MSB-first 12-bit result clocked on SCLK falling edge; high-impedance when CS is high. |
| SSTRB (Pin 16) | Serial Strobe Output | Pulses high before MSB in external clock mode; signals conversion start/end for TMS320 DSP sync. |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (channel, mode, power-down) on SCLK rising edge. |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; DOUT/SSTRB enter high-Z state when CS is high. |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; supports up to 2MHz with 40–60% duty cycle. |
| VDD (Pin 20) | 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 overhead. |
| Software-configurable unipolar/bipolar mode | Allows runtime selection of input range (0–VREF or ±VREF/2) via control byte bit 3, simplifying firmware adaptation. |
| Two power-down modes (fast/full) | Reduces average current to sub-µA levels between conversions-critical for portable medical devices with intermittent sampling. |
| SPI/MICROWIRE/TMS320-compatible interface | Eliminates glue logic when connecting to industry-standard microcontrollers and DSPs; CPOL=0, CPHA=0 required. |
| User-adjustable digital output voltage (VL) | Permits direct connection to 3V FPGA I/O banks or 5V microcontroller peripherals without level-shifting components. |
Applications
| Battery-Powered Instrumentation | Medical Patient Monitoring |
|---|---|
|
Use Scenario: Portable blood glucose meters and handheld ECG recorders requiring long battery life and high ADC accuracy. IC Role / Device Role / Timing Role: Primary 12-bit data acquisition front-end converting analog sensor outputs into digital streams for microcontroller processing. Use Value: 2µA full power-down current extends battery life; ±1 LSB INL ensures clinical-grade measurement repeatability. |
Use Scenario: Bedside vital sign monitors acquiring multi-channel biopotential signals (ECG, SpO₂, respiration). IC Role / Device Role / Timing Role: Simultaneous sampling hub for analog front-end conditioning stages, synchronized via SSTRB to host processor. Use Value: Pseudo-differential input mode rejects common-mode noise from patient leads; 133ksps supports Nyquist-compliant 50kHz bandwidth. |
| Industrial Process Control | 5V/3V Mixed-Supply Data Acquisition |
|
Use Scenario: PLC analog input modules measuring 4–20mA loop signals, thermocouples, and RTDs in factory automation. IC Role / Device Role / Timing Role: High-precision ADC subsystem interfacing with isolated signal conditioners and 3.3V ARM-based controllers. Use Value: ±1 LSB INL and channel-to-channel offset matching ≤0.1 LSB ensure consistent calibration across all 8 channels. |
Use Scenario: Embedded test equipment integrating legacy 5V analog sensors with modern 3.3V SoC platforms. IC Role / Device Role / Timing Role: Bridge device enabling seamless voltage-domain translation between analog and digital subsystems. Use Value: Independent VL pin decouples digital I/O voltage from analog supply, eliminating level-shifters and reducing BOM count. |
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 |
|---|---|---|---|
| MAX1202BCPP+ | Includes internal 4.096V reference; no external REF required; same pinout and timing. | Preferred where board space or BOM cost must be minimized and reference stability requirements are moderate. | Select MAX1202BCPP+ if internal reference suffices; MAX1203BCPP+ offers superior flexibility with external reference sourcing and trimming. |
| ADS7822U | 12-bit, 200ksps, SPI-only interface; no SSTRB output; requires 2.7–5.25V single supply; no bipolar mode. | Suitable for simpler unipolar-only systems lacking DSP synchronization needs or mixed-supply constraints. | Choose ADS7822U only for cost-sensitive, unipolar-only applications without TMS320 interface or dual-supply operation. |
Compared with MAX1202BCPP+, MAX1203BCPP+ trades integrated reference for external reference control and improved system-level accuracy tuning; versus ADS7822U, it adds bipolar mode, SSTRB synchronization, and true dual-supply analog operation-making it uniquely suited for precision mixed-voltage DAQ.
Availability
MAX1203BCPP+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, medical patient monitoring, industrial process control, and 5V/3V mixed-supply data acquisition requiring stable component supply and long-term lifecycle assurance.
Supply support for MAX1203BCPP+ 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 low-power, high-accuracy data acquisition in mixed-voltage embedded systems-specifically targeting applications where 3V digital logic must interface reliably with 5V analog signal chains.
FAQ
What is the reference voltage requirement for MAX1203BCPP+?
The MAX1203BCPP+ requires an external 4.096V reference applied to the REF pin. The internal reference buffer must be disabled by connecting REFADJ to VDD. This configuration ensures optimal gain accuracy and temperature stability, as specified in the datasheet's Electrical Characteristics table under "External Reference at REF." Using any other reference voltage invalidates the guaranteed INL and gain error specs.
Does MAX1203BCPP+ support differential input mode?
Yes, MAX1203BCPP+ supports pseudo-differential input mode using four channel pairs: CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. In this mode, the positive input (IN+) is sampled while the negative input (IN−) must remain stable within ±0.1 LSB relative to GND. A 0.1µF capacitor from IN− to GND is required to maintain stability during conversion, as detailed in the "Detailed Description" section of the datasheet.
How does the SHDN pin function on MAX1203BCPP+?
The SHDN pin on MAX1203BCPP+ provides three-level control: pulled low → full shutdown (≤10µA supply current); left open → external compensation mode for REFADJ; pulled to VDD → internal compensation mode. Unlike simple on/off pins, SHDN also configures the reference buffer's compensation network-directly affecting reference stability and settling time in precision applications.
What digital logic families is MAX1203BCPP+ compatible with?
MAX1203BCPP+ supports both 3V and 5V digital logic families. Its digital inputs (DIN, SCLK, CS, SHDN) meet 5V CMOS thresholds (VIH ≥ 2.0V, VIL ≤ 0.8V), while its outputs (DOUT, SSTRB) are level-set by the VL pin (2.7V–5.25V). This dual compatibility eliminates level shifters when interfacing with 3.3V microcontrollers or 5V FPGAs-confirmed by Absolute Maximum Ratings and DC Electrical Characteristics tables.
Can MAX1203BCPP+ operate with only a +5V supply (no negative rail)?
Yes, MAX1203BCPP+ operates with VSS tied to GND (0V) for unipolar input mode. In this configuration, the analog input range is 0V to VREF (e.g., 0–4.096V), and the device draws only positive supply current from VDD. Dual ±5V operation is optional and required only for bipolar input ranges (±VREF/2), as explicitly stated in the General Description and Absolute Maximum Ratings sections.
MAX1203BCPP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1203BCPP+ FAQ
1.How can I place an order for MAX1203BCPP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1203BCPP+ 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 MAX1203BCPP+ reliable?
The price and inventory of MAX1203BCPP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1203BCPP+ is usually 5 days.
3.What payment methods are accepted for MAX1203BCPP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1203BCPP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1203BCPP+?
MAX1203BCPP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1203BCPP+ 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 MAX1203BCPP+?
For technical support, including MAX1203BCPP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1203BCPP+ requirements.
6.How does Aetrix verify that MAX1203BCPP+ is sourced from the original manufacturer or authorized distributors?
All MAX1203BCPP+ 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 MAX1203BCPP+ meets industry standards.
7.What is the process for return or replacement of MAX1203BCPP+?
All MAX1203BCPP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1203BCPP+, 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 MAX1203BCPP+ part is unused and in its original packaging.
Return procedure for MAX1203BCPP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1203BCPP+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
