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Analog Devices Inc./Maxim Integrated MAX1202ACPP
- Part No.:
- MAX1202ACPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1202ACPP.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:193
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Product details
Overview
MAX1202ACPP from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) designed for mixed 5V analog / 3V digital systems. It integrates an on-chip track/hold, 4.096V internal reference, SPI/MICROWIRE-compatible 4-wire interface, and supports unipolar/bipolar input modes with ±0.5 LSB INL accuracy. It operates from single +5V or dual ±5V supplies and delivers 133ksps sampling rate in industrial data acquisition.
For engineers reviewing the MAX1202ACPP datasheet, MAX1202ACPP pinout, MAX1202ACPP application, or MAX1202ACPP equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for volume procurement and BOM continuity.
Technical Context
The MAX1202ACPP uses successive-approximation architecture with integrated track/hold and internal 4.096V reference buffer. Its 4-wire serial interface operates up to 2MHz and directly interfaces with SPI/MICROWIRE controllers without level-shifting logic, while the VL pin enables configurable 2.7V–5.25V digital output swing.
It supports software-selectable power-down modes (full shutdown ≤2μA, fast shutdown ≤70μA), automatic wake-up via serial access, and flexible input configuration: 8-channel single-ended or 4-channel pseudo-differential inputs with channel-to-channel offset matching ≤±0.1 LSB and gain matching ≤±0.002 LSB over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 1 part in 4096 full-scale precision for high-fidelity sensor digitization. |
| INL (Max) | ±0.5 LSB - ensures monotonicity and <0.012% absolute linearity error across full temperature range (0°C to +70°C). |
| Sampling Rate | 133 ksps - enables real-time capture of signals up to ~66 kHz using Nyquist criteria, supported by 4.5 MHz small-signal bandwidth. |
| Reference | Internal 4.096 V ±50 ppm/°C - eliminates external reference component cost and layout area; stable enough for 12-bit accuracy without trimming. |
| Supply Current (Op) | 1.5 mA typical - allows battery-powered operation with >600-hour runtime on a 1000 mAh cell at 1 ksps duty-cycled sampling. |
| Digital I/O Voltage | VL = 2.7V–5.25V - permits direct interfacing to 3.3V microcontrollers or 5V logic without level translators. |
| Power-Down Current | ≤2 μA - enables ultra-low-power sleep between conversions in portable medical or environmental monitoring devices. |
Pinout & Package
MAX1202ACPP is housed in a 20-pin plastic dual in-line package (PDIP) with 0.3-inch body width and standard through-hole mounting. Pin spacing is 0.1 inch; lead finish is lead(Pb)-free/RoHS-compliant per ordering suffix '+'.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential inputs; input common-mode range extends from VSS to VDD with ±0.3V overvoltage tolerance. |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (ground) or –5V ±5%; defines bipolar input range center and sets T/H reference point for differential mode. |
| SHDN (Pin 10) | Three-Level Control Input | Low = full shutdown (≤2 μA); open = external compensation mode; VDD = internal compensation mode for REFADJ adjustment. |
| REF (Pin 11) | Reference Buffer Output / ADC Reference | Delivers 4.096V ±0.02V (typ) when enabled; connects to external reference if MAX1203 variant used. |
| REFADJ (Pin 12) | Reference Gain Trim Input | Adjusts internal reference by ±1.5%; tie to VDD to disable buffer in external-reference configurations. |
| GND (Pin 13) | Analog Ground / IN– for SE Mode | Serves as signal return for single-ended conversions and system ground reference for analog section. |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB logic high level (2.7V–5.25V); decouples digital I/O voltage from VDD for mixed-supply compatibility. |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge synchronized; high-impedance when CS = high; drives 3V/5V logic directly. |
| SSTRB (Pin 16) | Serial Strobe Output | Pulses high before MSB in external clock mode; indicates conversion start/end in internal clock mode; enables TMS320 DSP synchronization. |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (START, SEL, UNI/BIP, SGL/DIF, PD1/PD0); sampled on SCLK rising edge. |
| CS (Pin 18) | Chip Select (Active Low) | Enables serial interface and powers up device; disables outputs and enters standby when high. |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; supports 0.1–2.0 MHz with 40–60% duty cycle. |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, T/H, and reference; supports operation with ±5V dual supplies when VSS = –5V. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with track/hold | Reduces external signal conditioning components; enables rapid channel switching with ≤1.5 μs acquisition time and 133 ksps throughput. |
| Internal 4.096V reference with REFADJ | Eliminates need for external precision reference IC or resistor divider; ±1.5% trim range compensates for board-level drift and aging. |
| Software-configurable unipolar/bipolar mode | Supports both 0–VREF (e.g., 0–4.096V sensor outputs) and ±VREF/2 (e.g., ±2.048V transducer signals) without hardware changes. |
| 3V/5V mixed digital interface (VL pin) | Allows seamless integration with 3.3V microcontrollers (ARM Cortex-M, MSP430) while maintaining 5V analog performance and noise immunity. |
| Two power-down modes with auto-wake | Reduces average current to <10 μA at low sampling rates; serial activity automatically restores full operation-no reset sequence required. |
Applications
| Industrial Process Monitoring | Portable Medical Instrumentation |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based control cabinets with 5V analog front-ends and 3.3V ARM-based controllers. IC Role / Device Role / Timing Role: Primary ADC for multi-sensor data acquisition; performs synchronized 133 ksps sampling across 8 channels with <±0.5 LSB INL for closed-loop feedback accuracy. Use Value: Internal reference and VL pin eliminate level-shifters and external references, reducing BOM count by 3 components and PCB area by >12 mm² per channel. |
Use Scenario: Battery-powered ECG/EMG units requiring low-noise, low-power analog front-end with clinical-grade linearity and isolation compliance. IC Role / Device Role / Timing Role: High-accuracy digitizer for biopotential signals; uses bipolar mode (±2.048V) and 4.5 MHz input bandwidth to preserve transient fidelity in QRS complexes. Use Value: Full power-down current ≤2 μA extends battery life to >100 hours on two AA cells; 12-bit resolution supports ≥70 dB SNR for diagnostic-grade waveform analysis. |
| Automotive Diagnostic Tools | Test & Measurement Equipment |
Use Scenario: Handheld OBD-II scanners capturing CAN bus auxiliary analog signals (e.g., throttle position, coolant temp) alongside digital diagnostics. IC Role / Device Role / Timing Role: Mixed-signal acquisition engine interfacing 5V automotive sensors to 3.3V host MCU; handles 0–5V unipolar and ±2.5V differential inputs. Use Value: Dual-supply operation (VDD = +5V, VSS = 0V or –5V) accommodates legacy 5V sensor rails and modern low-voltage hosts; ±0.1 LSB channel matching ensures consistent calibration across all 8 inputs. |
Use Scenario: Benchtop multimeters and data loggers requiring high DC accuracy, low drift, and flexible input scaling for lab-grade measurements. IC Role / Device Role / Timing Role: Precision ADC subsystem with internal 4.096V reference and ±0.5 LSB INL; supports programmable gain via REFADJ for auto-ranging functionality. Use Value: On-chip reference stability (±50 ppm/°C) reduces calibration frequency; 133 ksps sampling enables real-time waveform capture and FFT analysis up to 66 kHz. |
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, 200 ksps, single +5V supply only; no internal reference; requires external 2.5V ref; SPI-only interface (no MICROWIRE/TMS320 strobe). | Best suited for high-speed, single-supply systems where external reference is already present and TMS320 sync not needed. | Choose ADS7822U when higher throughput (200 vs 133 ksps) is critical and reference sourcing is centralized. |
| MAX11126ETE+ | 12-bit, 1 MSPS, internal 2.048V ref, 10-pin µMAX; supports 1.8V–3.6V VL; lower power (0.9 mA op, 1 μA shutdown); no bipolar mode. | Ideal for space-constrained, ultra-low-power portable designs needing unipolar-only measurement and smaller footprint. | Select MAX11126ETE+ for compact, battery-optimized designs where bipolar input and 20-pin PDIP are unnecessary. |
Compared with ADS7822U and MAX11126ETE+, the MAX1202ACPP uniquely combines internal 4.096V reference, bipolar input support, TMS320-compatible SSTRB strobe, and 20-pin PDIP for legacy-compatible prototyping-making it optimal for industrial and medical systems prioritizing design simplicity, mixed-voltage robustness, and long-term supply stability.
Availability
MAX1202ACPP is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, and automotive diagnostic tools requiring stable component supply, long-lifecycle assurance, and RoHS-compliant through-hole packaging.
Supply support for MAX1202ACPP 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 mixed 5V/3V data acquisition systems-delivering integrated track/hold, reference, and serial interface in a single chip to simplify sensor-to-processor signal chains in resource-constrained environments.
FAQ
What is the maximum sampling rate of the MAX1202ACPP?
The MAX1202ACPP achieves a maximum sampling rate of 133 ksps under specified conditions: external 2.0 MHz clock, 15 clock cycles per conversion, and VDD = +5V ±5%. This rate is sustained across all 8 input channels in sequential mode and supports real-time capture of signals up to ~66 kHz bandwidth using undersampling techniques.
Does the MAX1202ACPP require an external reference?
No, the MAX1202ACPP includes an internal 4.096V reference buffer that is factory-trimmed and temperature-compensated (±50 ppm/°C). Unlike the MAX1203 variant, the MAX1202ACPP does not require an external reference; REFADJ allows ±1.5% fine-tuning if needed for system-level calibration.
How does the VL pin affect digital output behavior in the MAX1202ACPP?
The VL pin on the MAX1202ACPP sets the high-level voltage for DOUT and SSTRB outputs. When VL = 3.3V, outputs swing from 0V to 3.3V, enabling direct connection to 3.3V microcontrollers without level shifters. The pin accepts 2.7V–5.25V, allowing interoperability with both 3V and 5V logic families while isolating digital I/O from analog supply noise.
Can the MAX1202ACPP operate with bipolar input signals?
Yes, the MAX1202ACPP supports bipolar input mode via software configuration (UNI/BIP bit = 0 in control byte). With VSS = –5V, it accepts differential inputs ranging from –2.048V to +2.048V (±VREF/2), making it suitable for transducers and bridge sensors requiring signed measurement ranges without external op-amp circuitry.
What power-down modes are available on the MAX1202ACPP?
The MAX1202ACPP offers two software-selectable power-down modes controlled by PD1/PD0 bits: full power-down (≤2 μA supply current, internal reference disabled) and fast power-down (≤70 μA, reference active for quicker wake-up). Both modes activate automatically on serial interface inactivity and exit instantly upon CS assertion or DIN activity.
MAX1202ACPP 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:
- -
MAX1202ACPP FAQ
1.How can I place an order for MAX1202ACPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202ACPP 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 MAX1202ACPP reliable?
The price and inventory of MAX1202ACPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202ACPP is usually 5 days.
3.What payment methods are accepted for MAX1202ACPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202ACPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202ACPP?
MAX1202ACPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202ACPP 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 MAX1202ACPP?
For technical support, including MAX1202ACPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202ACPP requirements.
6.How does Aetrix verify that MAX1202ACPP is sourced from the original manufacturer or authorized distributors?
All MAX1202ACPP 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 MAX1202ACPP meets industry standards.
7.What is the process for return or replacement of MAX1202ACPP?
All MAX1202ACPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202ACPP, 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 MAX1202ACPP part is unused and in its original packaging.
Return procedure for MAX1202ACPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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