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Analog Devices Inc./Maxim Integrated MAX1202BCAP
- Part No.:
- MAX1202BCAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1202BCAP.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,076
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Product details
Overview
MAX1202BCAP from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) with integrated track/hold, internal 4.096V reference, and SPI/MICROWIRE-compatible 4-wire interface. It operates from a single +5V analog supply or dual ±5V supplies, supports 133ksps sampling rate, and features user-adjustable digital output levels via VL pin (2.7V–5.25V). It is used in mixed 5V/3V data acquisition systems requiring high accuracy and low power.
For engineers reviewing the MAX1202BCAP datasheet, MAX1202BCAP pinout, MAX1202BCAP application, or MAX1202BCAP equivalent, key selection considerations include its ±1 LSB INL grade, 20-pin SSOP package, internal reference capability, 1.5mA operating current, and software-configurable unipolar/bipolar input modes for industrial sensor interfacing and battery-powered instrumentation.
Technical Context
The MAX1202BCAP employs successive-approximation architecture with an on-chip track/hold circuit enabling 1.5µs acquisition time and 4.5MHz small-signal bandwidth. Its analog front-end supports both 8-channel single-ended and 4-channel differential inputs, with channel selection and mode configuration controlled via an 8-bit serial control word.
It uses either internal clock (1.7MHz typical) or external clock up to 2MHz for conversion timing, with serial strobe (SSTRB) synchronized to conversion start/finish. The internal reference buffer provides 4.096V ±1 LSB accuracy at 25°C, with ±30ppm/°C tempco and ±1.5% REFADJ adjustability - all validated for the MAX1202BCAP variant per ordering table and electrical specs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 1 part in 4096 quantization steps for precision measurement |
| INL (Integral Nonlinearity) | ±1 LSB - ensures monotonicity and ≤0.024% full-scale error across temperature range |
| Sampling Rate | 133ksps - enables real-time capture of signals up to ~66kHz (Nyquist-limited) with external 2MHz clock |
| Supply Current (Operating) | 1.5mA - allows continuous operation in low-power embedded systems with minimal thermal load |
| Power-Down Current | 2μA (full) / 30μA (fast) - supports duty-cycled acquisition to extend battery life in portable instruments |
| Digital I/O Voltage Range (VL) | 2.7V to 5.25V - permits direct interfacing with 3V, 3.3V, or 5V logic without level shifters |
| Reference | Internal 4.096V ±1 LSB - eliminates need for external reference IC while supporting precise 0–4.096V unipolar or ±2.048V bipolar full-scale ranges |
Pinout & Package
MAX1202BCAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant and lead-free. Pin functions are electrically and mechanically validated per Maxim's official pin description and top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential inputs; input protection clamps to VDD/VSS (−0.3V to +5.3V) |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (GND) or −5V ±5%; defines bipolar input common-mode baseline |
| SHDN (Pin 10) | Three-Level Shutdown Control | Low = 10μA shutdown; open = external REF compensation; VDD = internal REF compensation |
| REF (Pin 11) | Reference Buffer Output / ADC Reference Input | Delivers 4.096V (MAX1202 only); requires 4.7μF bypass capacitor for stability |
| REFADJ (Pin 12) | Reference Gain Adjustment Input | ±1.5% trim range; tie to VDD to disable internal reference buffer (for MAX1203 mode) |
| GND (Pin 13) | Analog Ground / IN− for Single-Ended Mode | Common return for analog signals and reference; critical for noise-sensitive layout |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB logic high level (2.7V–5.25V); decouples digital I/O from analog VDD |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge aligned; high-impedance when CS = high |
| SSTRB (Pin 16) | Serial Strobe Output | Pulses high before MSB in external clock mode; indicates conversion start/finish in internal clock mode |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control word (START, SEL, UNI/BIP, SGL/DIF, PD1/PD0) on SCLK rising edge |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface; disables DOUT/SSTRB outputs when high |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; 100kHz–2MHz compatible |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, track/hold, and reference buffer |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with pseudo-differential architecture | Supports flexible signal routing: 8 single-ended or 4 differential pairs (CH0/CH1, CH2/CH3, etc.) with <1 LSB channel-to-channel offset matching |
| Internal 4.096V reference with REFADJ trim | Eliminates external reference component; ±1.5% gain adjustment enables calibration to system-specific full-scale requirements |
| Software-configurable unipolar/bipolar input mode | Single control bit (UNI/BIP) selects 0–VREF (unipolar) or −VREF/2 to +VREF/2 (bipolar), simplifying firmware for diverse sensor types |
| Three power-down modes with automatic wake-up | Full (2μA), fast (30μA), and idle modes; serial interface activity automatically restores full operation - no reset sequence required |
| 3V/3.3V/5V digital I/O compatibility via VL pin | Enables direct connection to modern low-voltage microcontrollers (e.g., ARM Cortex-M) without level-shifting circuitry |
| SPI/MICROWIRE/TMS320-compatible serial interface | Uses standard 4-wire protocol (CS, SCLK, DIN, DOUT); requires no glue logic for TI C2000 or STM32 MCU integration |
Applications
| Industrial Process Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based control cabinets with mixed 5V analog and 3.3V digital rails. IC Role / Device Role / Timing Role: Primary ADC for multi-sensor data acquisition; performs 133ksps conversions with 12-bit resolution and ±1 LSB linearity. Use Value: Internal 4.096V reference ensures stable full-scale calibration across temperature; low 1.5mA supply current reduces thermal drift in enclosed enclosures. |
Use Scenario: Battery-powered ECG or pulse oximeter front-end digitizing biopotential signals with high common-mode rejection. IC Role / Device Role / Timing Role: Bipolar-input ADC capturing ±2.048V differential signals from instrumentation amplifiers; configured via serial interface for dynamic range optimization. Use Value: 2μA full power-down mode extends battery life between patient measurements; 4.5MHz input bandwidth preserves transient fidelity in cardiac waveforms. |
| Automotive Diagnostic Tools | Test & Measurement Equipment |
|
Use Scenario: Handheld OBD-II scanner acquiring analog sensor voltages (TPS, MAP, coolant temp) in vehicles with 5V sensor supplies and 3.3V microcontroller cores. IC Role / Device Role / Timing Role: Mixed-supply ADC bridging legacy automotive analog sensors to modern low-voltage SoCs; supports unipolar 0–5V and bipolar ±2.5V ranges. Use Value: VL pin set to 3.3V enables direct DOUT/SSTRB connection to MCU GPIOs; ±1 LSB INL meets AEC-Q200-derived accuracy expectations for diagnostics. |
Use Scenario: Benchtop multimeter or data logger measuring DC/AC signals with programmable gain and auto-ranging. IC Role / Device Role / Timing Role: High-accuracy ADC core with configurable input modes and serial strobe for synchronized sampling across multiple channels. Use Value: Channel-to-channel crosstalk <−85dB prevents interference during simultaneous multi-channel acquisition; 70dB SINAD supports 11.3-bit effective resolution. |
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, single +5V supply, no internal reference, SPI-only interface | Lacks internal reference and bipolar mode; requires external REF and op-amp for differential inputs | Choose for higher speed where external reference and signal conditioning are already present |
| MAX11126ETE+ | 12-bit, 500ksps, internal reference, 3V-only supply, 16-pin TQFN | Lower supply voltage (3V), smaller package, higher speed, but incompatible with ±5V analog inputs | Choose for space-constrained 3V-only designs needing faster throughput and lower power |
Compared with ADS7822U and MAX11126ETE+, the MAX1202BCAP uniquely combines internal 4.096V reference, ±5V analog supply support, and true 3V/5V digital I/O flexibility - making it optimal for retrofitting legacy 5V sensor systems with modern low-voltage controllers without redesigning reference or level-shifting networks.
Availability
MAX1202BCAP is available at Aetrix Electronics and suitable for industrial process control, portable medical instrumentation, and automotive diagnostic tools requiring stable component supply and long-term obsolescence management.
Supply support for MAX1202BCAP 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 series belongs to Maxim's precision data acquisition product line, designed specifically for mixed 5V/3V systems requiring low-power, high-accuracy ADCs with integrated reference and flexible digital interfacing.
FAQ
What is the guaranteed INL specification for MAX1202BCAP?
The MAX1202BCAP is specified with ±1 LSB integral nonlinearity over the commercial temperature range (0°C to +70°C), as confirmed in the Ordering Information table and Electrical Characteristics section. This grade is distinct from the ±0.5 LSB MAX1202ACAP variant and applies exclusively to the 'B' grade SSOP device.
Does MAX1202BCAP require an external reference capacitor?
Yes - the MAX1202BCAP requires a 4.7μF capacitor at the REF pin when using internal reference mode, as explicitly stated in the Electrical Characteristics table under "Capacitive Bypass at REF" and confirmed in the Typical Operating Circuit. Omitting this capacitor risks reference instability and degraded INL performance.
Can MAX1202BCAP operate with a −5V VSS supply in bipolar mode?
Yes - the MAX1202BCAP supports dual ±5V analog supplies, and VSS may be connected to −5V ±5% to enable true bipolar input operation (±VREF/2 = ±2.048V). This configuration is validated in the Absolute Maximum Ratings, Electrical Characteristics conditions, and Pin Description for VSS.
What is the function of the SHDN pin on MAX1202BCAP?
The SHDN pin on MAX1202BCAP provides three-level control: pulled low → full shutdown (≤10μA); left open → external REF compensation mode; tied to VDD → internal REF compensation mode. This behavior is documented in the Pin Description table and Figure 10 timing diagrams.
Is MAX1202BCAP compatible with SPI mode CPOL=0, CPHA=0?
Yes - the MAX1202BCAP is explicitly SPI-compatible with CPOL = 0 and CPHA = 0, as stated in the "How to Start a Conversion" section. Data is latched on SCLK rising edge (DIN) and sampled on falling edge (DOUT), matching standard SPI Mode 0 timing.
MAX1202BCAP 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, Internal
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1202BCAP FAQ
1.How can I place an order for MAX1202BCAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202BCAP 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 MAX1202BCAP reliable?
The price and inventory of MAX1202BCAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202BCAP is usually 5 days.
3.What payment methods are accepted for MAX1202BCAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202BCAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202BCAP?
MAX1202BCAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202BCAP 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 MAX1202BCAP?
For technical support, including MAX1202BCAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202BCAP requirements.
6.How does Aetrix verify that MAX1202BCAP is sourced from the original manufacturer or authorized distributors?
All MAX1202BCAP 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 MAX1202BCAP meets industry standards.
7.What is the process for return or replacement of MAX1202BCAP?
All MAX1202BCAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202BCAP, 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 MAX1202BCAP part is unused and in its original packaging.
Return procedure for MAX1202BCAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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