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Analog Devices Inc./Maxim Integrated MAX1202BCPP+
- Part No.:
- MAX1202BCPP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1202BCPP+.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,884
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Product details
Overview
MAX1202BCPP+ from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) designed for mixed 5V analog / 3V digital systems. It features an internal 4.096V reference, ±1 LSB integral nonlinearity, 133ksps sampling rate, and SPI/MICROWIRE-compatible 4-wire interface - enabling direct connection to TMS320 DSPs in battery-powered medical instruments and process control systems.
For engineers reviewing the MAX1202BCPP+ datasheet, MAX1202BCPP+ pinout, MAX1202BCPP+ application, or MAX1202BCPP+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated 20-pin PDIP pin functions, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX1202BCPP+ uses successive-approximation architecture with integrated track/hold circuitry, supporting both unipolar (0–VREF) and bipolar (±VREF/2) input modes via software-configurable control byte. Its internal reference buffer provides 4.096V output with ±30 ppm/°C tempco (B-grade), adjustable via REFADJ pin.
It operates from single +5V or dual ±5V analog supplies, while digital I/O levels are independently set by VL (2.7V–5.25V). Conversion timing is governed by either internal clock (~1.7 MHz) or external SCLK up to 2 MHz, with acquisition time fixed at 1.5 µs and aperture jitter <50 ps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 1 part in 4096 quantization granularity for precision measurement. |
| INL (Max) | ±1 LSB - ensures monotonicity and ≤0.024% full-scale error across temperature for calibration-sensitive applications. |
| Sampling Rate | 133 ksps - supports real-time capture of signals up to ~66 kHz (Nyquist-limited) without undersampling. |
| Reference | Internal 4.096V - eliminates external reference component count; buffered output enables gain trim via REFADJ. |
| Supply Current | 1.5 mA (active), 2 µA (full power-down) - enables ultra-low-power operation between conversions in portable instrumentation. |
| Digital Interface | SPI/MICROWIRE/TMS320-compatible 4-wire serial - requires no level-shifting logic when interfacing with 3V microcontrollers or DSPs. |
| Input Configuration | 8-channel single-ended or 4-channel pseudo-differential - simplifies sensor multiplexing in multi-point data acquisition. |
Pinout & Package
MAX1202BCPP+ is housed in a 20-pin plastic DIP (PDIP) package, 0.300" wide, RoHS-compliant and lead-free (+ suffix). Pin spacing is 0.100", compatible with standard through-hole PCB layouts and socket-based prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Support 8 single-ended or 4 differential inputs; IN- must remain stable within ±0.1 LSB during conversion. |
| VSS (Pin 9) | Negative supply rail | Accepts 0V (single-supply) or –5V ±5% (dual-supply); sets bipolar input common-mode baseline. |
| SHDN (Pin 10) | Three-level shutdown control | Pull low → 10 µA shutdown; leave open → external compensation mode; tie to VDD → internal compensation. |
| REF (Pin 11) | Reference buffer output / ADC reference input | Delivers 4.096V ±20 mV (B-grade) when enabled; disable buffer by pulling REFADJ to VDD for external reference use. |
| REFADJ (Pin 12) | Reference buffer gain adjustment | ±1.5% fine-tuning range; tie to VDD to disable internal reference buffer for MAX1203 compatibility. |
| GND (Pin 13) | Analog ground / IN- for single-ended mode | Common return for analog signals; serves as reference for CH0–CH7 in unipolar single-ended configuration. |
| VL (Pin 14) | Digital output supply | Sets DOUT/SSTRB logic high level (2.7V–5.25V); enables direct interfacing with 3V, 3.3V, or 5V controllers. |
| DOUT (Pin 15) | Serial data output | MSB-first, SCLK-falling-edge synchronized; high-impedance when CS is high - supports bus sharing. |
| SSTRB (Pin 16) | Serial strobe output | Pulses high before MSB in external clock mode; indicates conversion start/end in internal clock mode. |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte (START, SEL2–SEL0, UNI/BIP, SGL/DIF, PD1/PD0) on SCLK rising edge. |
| CS (Pin 18) | Chip select (active low) | Enables serial interface and powers up device; DOUT/SSTRB enter high-Z when CS is high. |
| SCLK (Pin 19) | Serial clock input | Drives data transfer and (in external mode) conversion timing; supports up to 2 MHz with 40–60% duty cycle. |
| VDD (Pin 20) | Positive analog supply | +5V ±5%; powers analog core, track/hold, and reference buffer; must be decoupled per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| User-adjustable digital output voltage | VL pin accepts 2.7V–5.25V to set DOUT/SSTRB logic-high level - eliminates level shifters in mixed-voltage systems. |
| Software-configurable input mode | Control byte selects unipolar/bipolar and single-ended/differential operation - enables flexible sensor interface without hardware changes. |
| Low-power shutdown with fast wake-up | Full power-down draws ≤2 µA; quick turn-on allows cycling between conversions - reduces average current in intermittent-sampling designs. |
| Integrated track/hold with 4.5 MHz bandwidth | Acquires signal in 1.5 µs; supports accurate digitization of transients and high-frequency signals up to 4.5 MHz small-signal BW. |
| Reference-buffer amplifier with gain trim | Internal 1.68× gain stage (MAX1202) with REFADJ pin - simplifies system-level gain calibration and improves reference stability. |
Applications
| Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Portable ECG or blood glucose monitor acquiring analog sensor outputs with limited power budget. IC Role / Device Role / Timing Role: 12-bit ADC digitizing conditioned biopotential signals at 1–10 ksps, using internal reference and VL = 3.3V for MCU compatibility. Use Value: 2 µA shutdown current extends battery life; ±1 LSB INL ensures clinical-grade accuracy without factory calibration. |
Use Scenario: Remote environmental sensor node logging temperature, humidity, and pressure over weeks on coin-cell power. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during scheduled sampling bursts; powered down between readings. Use Value: Full power-down mode cuts quiescent current to ≤2 µA; 1.5 µs acquisition enables rapid wake-and-measure cycles. |
| Industrial Process Control | 5V/3V Mixed-Supply PLC Modules |
Use Scenario: Analog input module in programmable logic controller measuring 4–20 mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: 8-channel multiplexer feeding single ADC core; bipolar mode supports ±10V industrial sensor ranges. Use Value: Channel-to-channel offset matching ≤0.1 LSB ensures consistent channel-to-channel accuracy across all 8 inputs. |
Use Scenario: Embedded controller board with 5V analog front-end and 3.3V FPGA or ARM processor. IC Role / Device Role / Timing Role: Bridge between 5V sensors and 3.3V digital domain; VL = 3.3V configures DOUT/SSTRB for safe FPGA I/O. Use Value: Eliminates discrete level translators; SPI-compatible interface reduces firmware complexity versus parallel ADCs. |
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 |
|---|---|---|---|
| MAX1203BCPP+ | No internal reference; requires external 4.096V source at REF pin; same INL (±1 LSB), package, and pinout. | Suitable where system already provides precision reference; avoids internal reference tempco drift but adds BOM cost. | Select MAX1203BCPP+ if reference stability is prioritized over component count reduction. |
| ADS7822U | 12-bit, 200 ksps, SPI-only interface; no internal reference; 2.7–5.25V supply; 3.5 µA shutdown; 20-pin SOIC. | Higher speed but lacks bipolar mode and software-configurable input types; optimized for low-voltage battery systems. | Choose ADS7822U for higher throughput in 3V-only designs where bipolar input is unnecessary. |
Compared with MAX1202BCPP+, MAX1203BCPP+ removes internal reference dependency at the cost of added external components, while ADS7822U trades configurability and bipolar support for higher speed and lower shutdown current in compact SOIC packaging.
Availability
MAX1202BCPP+ is available at Aetrix Electronics and suitable for medical instrumentation, battery-powered data loggers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX1202BCPP+ 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-voltage environments, targeting applications where 3V digital logic must interface reliably with 5V analog signal chains without level-shifting overhead.
FAQ
What is the maximum sampling rate of the MAX1202BCPP+?
The MAX1202BCPP+ achieves a maximum sampling rate of 133 ksps when using a 2 MHz external clock and 15 clock cycles per conversion. This rate is sustained across the full commercial temperature range (0°C to +70°C) and is limited by internal track/hold acquisition time (1.5 µs) and successive-approximation conversion latency. The MAX1202BCPP+ does not support oversampling or decimation modes beyond its native 12-bit resolution.
Does the MAX1202BCPP+ support differential input mode?
Yes, the MAX1202BCPP+ supports pseudo-differential input mode via software configuration: setting SGL/DIF = 0 in the control byte selects differential pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7). In this mode, only the positive input (IN+) is actively sampled; the negative input (IN-) must remain stable within ±0.1 LSB relative to GND, typically achieved with a 0.1 µF capacitor to ground. The MAX1202BCPP+ does not perform true differential sampling across both inputs simultaneously.
How does the VL pin affect digital output behavior in the MAX1202BCPP+?
The VL pin on the MAX1202BCPP+ directly sets the high-level output voltage of DOUT and SSTRB pins, accepting 2.7V to 5.25V. When VL = 3.3V, DOUT drives VOH ≥ 2.8V and VOL ≤ 0.4V under 3 mA load - ensuring reliable interfacing with 3.3V CMOS logic without risk of overvoltage damage. This eliminates external level shifters in mixed-supply systems and maintains signal integrity across varying logic families.
What is the purpose of the SHDN pin on the MAX1202BCPP+?
The SHDN pin on the MAX1202BCPP+ provides three-level control: pulled low → full shutdown (≤2 µA supply current); left floating → external compensation mode for REF buffer; tied to VDD → internal compensation mode. Unlike simple enable/disable pins, SHDN also configures the reference buffer's compensation network, directly affecting reference stability and settling time - making it critical for precision applications requiring fast wake-up and repeatable reference behavior.
Can the MAX1202BCPP+ operate with a single +5V supply?
Yes, the MAX1202BCPP+ operates with a single +5V analog supply (VDD = +5V ±5%, VSS = GND) in unipolar input mode. In this configuration, the full-scale range is 0V to +4.096V (internal reference), supporting sensors like potentiometers or amplified RTDs. Dual ±5V operation (VSS = –5V) is required only for bipolar input ranges (±2.048V), and the device maintains ±1 LSB INL and 133 ksps performance in both configurations.
MAX1202BCPP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1202BCPP+ FAQ
1.How can I place an order for MAX1202BCPP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202BCPP+ 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 MAX1202BCPP+ reliable?
The price and inventory of MAX1202BCPP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202BCPP+ is usually 5 days.
3.What payment methods are accepted for MAX1202BCPP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202BCPP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202BCPP+?
MAX1202BCPP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202BCPP+ 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 MAX1202BCPP+?
For technical support, including MAX1202BCPP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202BCPP+ requirements.
6.How does Aetrix verify that MAX1202BCPP+ is sourced from the original manufacturer or authorized distributors?
All MAX1202BCPP+ 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 MAX1202BCPP+ meets industry standards.
7.What is the process for return or replacement of MAX1202BCPP+?
All MAX1202BCPP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202BCPP+, 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 MAX1202BCPP+ part is unused and in its original packaging.
Return procedure for MAX1202BCPP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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