My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX1202ACAP+T
- Part No.:
- MAX1202ACAP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1202ACAP+T.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,228
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX1202ACAP+T 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 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 (A-grade). It delivers 133ksps sampling at 2MHz SCLK in commercial-temperature (0°C to +70°C) applications such as portable medical instrumentation and battery-powered data loggers.
For engineers reviewing the MAX1202ACAP+T datasheet, MAX1202ACAP+T pinout, MAX1202ACAP+T application, or MAX1202ACAP+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated 20-pin SSOP pin functions, confirmed alternatives with documented functional differences, and supply-chain support details specific to this RoHS-compliant A-grade variant.
Technical Context
The MAX1202ACAP+T uses successive-approximation architecture with integrated track/hold and internal 4.096V reference buffer, enabling precise 12-bit conversions without external reference components. Its 4-wire serial interface operates up to 2MHz and is natively compatible with SPI (CPOL=0, CPHA=0) and MICROWIRE protocols, eliminating level-shifting logic when interfacing with 3V microcontrollers.
It supports dual-supply operation (±5V) or single +5V analog supply, with user-adjustable digital output levels via VL pin (2.7V–5.25V), and features two software-selectable power-down modes-full power-down (≤2μA) and fast power-down (≤70μA)-activated via PD1/PD0 bits in the control byte.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision measurement. |
| INL (A-grade) | ±0.5 LSB - ensures monotonicity and ≤0.012% full-scale linearity error across temperature, critical for closed-loop control accuracy. |
| Sampling Rate | 133ksps - enables real-time capture of signals up to ~66kHz (Nyquist-limited) using external 2MHz clock. |
| Reference | Internal 4.096V ±30ppm/°C - eliminates external reference component count and simplifies calibration for unipolar 0–4.096V input range. |
| Supply Current | 1.5mA operating / ≤2μA full power-down - supports ultra-low-power wake-up sampling in battery-operated instruments. |
| Digital Interface | SPI/MICROWIRE/TMS320-compatible 4-wire serial - directly connects to ARM Cortex-M, MSP430, or C2000 DSPs without glue logic. |
| Input Configuration | 8-channel single-ended or 4-channel pseudo-differential - allows flexible sensor multiplexing while maintaining channel-to-channel offset matching ≤0.1 LSB. |
Pinout & Package
MAX1202ACAP+T is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant and lead-free per +T suffix. The package supports surface-mount reflow and offers thermal performance rated at 640mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable single-ended or pseudo-differential inputs; CH0–CH7 support 8:1 multiplexing with ≤0.1 LSB channel-to-channel offset matching. |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (single-supply) or –5V (dual-supply); sets bipolar input common-mode range and defines GND reference for IN– in differential mode. |
| SHDN (Pin 10) | Three-Level Shutdown Control | Pulled low → full shutdown (≤2μA); left floating → external compensation mode; tied to VDD → internal compensation mode. |
| REF (Pin 11) | Reference Buffer Output / ADC Reference Input | Delivers stable 4.096V (MAX1202 only); bypassed with 4.7μF capacitor for A-grade stability and low-noise conversion. |
| REFADJ (Pin 12) | Reference Gain Adjustment Input | Allows ±1.5% fine-tuning of internal reference; tied to VDD disables buffer for external reference use (not applicable to MAX1202). |
| GND (Pin 13) | Analog Ground / IN– for Single-Ended Mode | Primary ground return; serves as IN– reference point during single-ended conversions (CHx to GND). |
| 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 logic families without level shifters. |
| DOUT (Pin 15) | Serial Data Output | MSB-first 12-bit result clocked on SCLK falling edge; high-impedance when CS = high; supports 3mA sink at 0.4V VOL. |
| SSTRB (Pin 16) | Serial Strobe Output | Indicates conversion status: pulses high before MSB in external-clock mode; asserts low during conversion in internal-clock mode. |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (START, SEL2–SEL0, UNI/BIP, SGL/DIF, PD1/PD0); sampled on SCLK rising edge. |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface and powers up device; DOUT/SSTRB enter high-Z state when CS = high. |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; supports 0.1–2.0MHz frequency with 40–60% duty cycle. |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5% main supply; powers analog core, track/hold, and reference buffer; absolute max = +6V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Track/Hold with 1.5μs Acquisition Time | Enables accurate sampling of fast-rising transients without external TH circuitry; acquisition time scales with source impedance but guaranteed ≥1.5μs. |
| Software-Configurable Unipolar/Bipolar Input Mode | Single control-bit selection (UNI/BIP) switches full-scale range between 0–4.096V (unipolar) or ±2.048V (bipolar), supporting both sensor and AC-coupled signal paths. |
| User-Adjustable Digital Output Voltage (VL Pin) | Allows seamless interoperability with 3V, 3.3V, or 5V host processors by setting DOUT/SSTRB swing independently of VDD-no level translators required. |
| Two Power-Down Modes with Automatic Wake-Up | Full power-down (≤2μA) and fast power-down (≤70μA) reduce average current in burst-sampling systems; serial access automatically restores full operation. |
| Channel-to-Channel Offset Matching ≤0.1 LSB | Ensures consistent gain/offset across all 8 channels-critical for multi-sensor data acquisition where inter-channel consistency matters more than absolute accuracy. |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous vital-sign monitoring (ECG, SpO₂) in handheld patient monitors with limited battery capacity and strict EMI constraints. IC Role / Device Role / Timing Role: Primary ADC digitizing low-amplitude, high-impedance biopotential signals with 12-bit resolution and <0.1 LSB channel matching. Use Value: Internal 4.096V reference and 2μA shutdown enable >100-hour battery life; 3V-compatible VL pin eliminates level-shifter BOM cost and layout area. |
Use Scenario: Environmental sensing node logging temperature, humidity, and pressure over weeks on coin-cell power. IC Role / Device Role / Timing Role: Low-power, multi-channel front-end ADC performing periodic wake-up sampling with automatic power cycling. Use Value: Full power-down mode cuts quiescent current to ≤2μA between samples; 8-channel MUX reduces external component count vs. discrete ADC solutions. |
| Industrial Process Control Sensors | 5V/3V Mixed-Supply Embedded Systems |
Use Scenario: DIN-rail mounted PLC I/O module acquiring analog sensor outputs (4–20mA, thermocouple) in factory automation environments. IC Role / Device Role / Timing Role: Precision ADC handling bipolar inputs (±2.048V) and rejecting supply noise via PSR >±0.5mV over ±5% VDD variation. Use Value: ±0.5 LSB INL and ±0.1 LSB channel matching ensure repeatability across sensor channels; dual ±5V supply tolerance supports legacy industrial rails. |
Use Scenario: Industrial HMI with 5V analog sensors and 3.3V FPGA or ARM SoC processing backend. IC Role / Device Role / Timing Role: Bridge ADC providing native 3V logic-level serial interface while powered from 5V analog rail-eliminating voltage translation. Use Value: VL pin decouples digital I/O voltage from VDD, enabling direct connection to 3.3V FPGA I/O banks without risk of overvoltage or level-shifter delay skew. |
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 +2.7V–5.25V supply, no internal reference, SPI-only interface | Requires external reference and level-shifting for 5V analog/3V digital systems; lacks bipolar mode and SHDN pin | Choose for ultra-low-voltage (2.7V) operation where internal reference and shutdown are not needed. |
| MAX11131ETE+ | 12-bit, 500ksps, internal 2.048V reference, 10-pin TDFN, SPI interface, 1.8V–3.6V VL range only | Higher speed but narrower VL range (1.8–3.6V); incompatible with 5V logic; no ±5V analog supply support | Choose for space-constrained, high-speed designs with 3.3V-only digital domains and no dual-supply requirement. |
Compared with ADS7822U and MAX11131ETE+, the MAX1202ACAP+T uniquely combines internal 4.096V reference, ±5V analog supply capability, three-level SHDN control, and 2.7V–5.25V VL flexibility-making it the only option among the three that fully supports mixed 5V/3V systems without external support components or layout compromises.
Availability
MAX1202ACAP+T is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data loggers, and industrial process control requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX1202ACAP+T 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, mixed-voltage data acquisition in resource-constrained embedded systems-emphasizing integration (MUX + T/H + ref + interface), supply flexibility (±5V or +5V), and 3V digital compatibility without external logic.
FAQ
What is the maximum sampling rate achievable with MAX1202ACAP+T?
The MAX1202ACAP+T achieves a maximum sampling rate of 133ksps when using a 2MHz external serial clock and 15 clock cycles per conversion. This rate assumes optimal conditions: VDD = +5V ±5%, VL = 2.7V–3.6V, and TA = 0°C to +70°C. Internal clock mode reduces maximum rate to ~100ksps due to lower internal oscillator frequency (1.7MHz typical).
Does MAX1202ACAP+T require an external reference capacitor?
Yes, the MAX1202ACAP+T requires a 4.7μF capacitor at the REF pin when operating in internal reference mode (default for this part). This capacitor stabilizes the 4.096V reference output and is mandatory for achieving the specified ±0.5 LSB INL accuracy and ±30ppm/°C temperature coefficient. Omitting it degrades DC accuracy and increases noise.
How does the SHDN pin function on MAX1202ACAP+T?
The SHDN pin on MAX1202ACAP+T provides three distinct operating states: pulled low → full power-down (≤2μA supply current); left open → external compensation mode (enables 4.7μF REF bypass); tied to VDD → internal compensation mode (disables external capacitor requirement). Unlike simple on/off pins, SHDN also configures the reference buffer's compensation topology.
Can MAX1202ACAP+T interface directly with a 3.3V microcontroller SPI port?
Yes, MAX1202ACAP+T interfaces directly with 3.3V microcontrollers via its VL pin: applying 3.3V to VL sets DOUT and SSTRB logic-high level to ~2.8V (VOH = VL − 0.5V), which meets 3.3V CMOS input thresholds. DIN, SCLK, and CS accept 3.3V logic levels natively, and the 4-wire SPI-compatible interface requires no additional level-shifting circuitry.
What is the difference between MAX1202ACAP+T and MAX1202BCAP+T?
The MAX1202ACAP+T and MAX1202BCAP+T share identical pinout, package (20-pin SSOP), and electrical architecture, differing only in DC accuracy grade: MAX1202ACAP+T guarantees ±0.5 LSB integral nonlinearity (INL), while MAX1202BCAP+T guarantees ±1.0 LSB INL. Both operate from 0°C to +70°C and include the same internal 4.096V reference and power-down features.
MAX1202ACAP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
MAX1202ACAP+T FAQ
1.How can I place an order for MAX1202ACAP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202ACAP+T 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 MAX1202ACAP+T reliable?
The price and inventory of MAX1202ACAP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202ACAP+T is usually 5 days.
3.What payment methods are accepted for MAX1202ACAP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202ACAP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202ACAP+T?
MAX1202ACAP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202ACAP+T 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 MAX1202ACAP+T?
For technical support, including MAX1202ACAP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202ACAP+T requirements.
6.How does Aetrix verify that MAX1202ACAP+T is sourced from the original manufacturer or authorized distributors?
All MAX1202ACAP+T 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 MAX1202ACAP+T meets industry standards.
7.What is the process for return or replacement of MAX1202ACAP+T?
All MAX1202ACAP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202ACAP+T, 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 MAX1202ACAP+T part is unused and in its original packaging.
Return procedure for MAX1202ACAP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX1202ACAP+T 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…
