My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX188CCAP
- Part No.:
- MAX188CCAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX188CCAP.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,933
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX188CCAP from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) with software-configurable unipolar/bipolar and single-ended/differential inputs, internal track/hold, SPI/QSPI/MICROWIRE-compatible 4-wire interface, and ultra-low 1.5mA operating current. It operates from a single +5V or dual ±5V supply and targets precision data acquisition in battery-powered instruments and portable data loggers.
For engineers reviewing the MAX188CCAP datasheet, MAX188CCAP pinout, MAX188CCAP application, or MAX188CCAP equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply support details for industrial and embedded OEM use.
Technical Context
The MAX188CCAP uses successive-approximation (SAR) architecture with an integrated track/hold circuit enabling 133ksps sampling at 2MHz external clock or internal clock operation up to 10MHz serial data rate. Its analog input multiplexer supports eight single-ended or four differential channel pairs, with configurable input polarity and reference mode.
Unlike the MAX186, the MAX188CCAP requires an external reference voltage applied to VREF (typically 4.096V), while its REFADJ pin accepts adjustable voltage to set gain via internal buffer amplifier (gain = 1.638). The SHDN pin provides three-level control: low for full shutdown (≤10µA), high for internal compensation, open for external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 0.024% of full-scale range for high-accuracy measurement |
| Sampling Rate | 133ksps - supports real-time capture of signals up to 66.5kHz Nyquist bandwidth |
| Input Channels | 8 single-ended or 4 pseudo-differential - enables multi-sensor monitoring without external MUX |
| Supply Current | 1.5mA (active), ≤10µA (shutdown) - extends battery life in portable instrumentation |
| Reference Mode | External VREF required (4.096V typical) - allows system-level reference calibration and temperature stability control |
| Serial Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire - integrates directly with common microcontrollers without level shifters or glue logic |
| INL / DNL | ±1.0 LSB / ±1 LSB - ensures monotonicity and <0.025% end-point linearity error across temperature |
Pinout & Package
MAX188CCAP is housed in a 20-pin shrink small-outline package (SSOP), RoHS-compliant and lead-free, occupying 30% less PCB area than an 8-pin PDIP. Pin pitch is 0.65mm; body dimensions are 7.2mm × 5.3mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Selectable as single-ended (vs AGND) or differential pairs (CH0/CH1, CH2/CH3, etc.) via control byte |
| VSS (Pin 9) | Negative supply rail | Accepts 0V (unipolar) or –5V ±5% (bipolar); sets analog input common-mode range |
| SHDN (Pin 10) | Three-state shutdown control | Low = full power-down (≤10µA); high = internal compensation; open = external compensation |
| VREF (Pin 11) | Reference voltage terminal | Input for external 4.096V reference; also output of buffered reference (1.638 × REFADJ) |
| REFADJ (Pin 12) | Reference buffer gain adjust | Set voltage here to scale VREF output; connect to VDD to disable buffer |
| AGND (Pin 13) | Analog ground reference | Return for analog inputs and internal T/H; must be separated from DGND for noise immunity |
| DGND (Pin 14) | Digital ground reference | Return for serial interface and logic; tied to AGND at single point per layout best practice |
| DOUT (Pin 15) | Serial data output | MSB-first 12-bit result; high-impedance when CS is high; synchronized to SCLK falling edge |
| SSTRB (Pin 16) | Serial strobe output | Signals conversion start/end: low during conversion (internal clock) or one-cycle pulse before MSB (external clock) |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte defining channel, polarity, mode, and clock selection |
| CS (Pin 18) | Active-low chip select | Enables serial interface; DOUT enters high-Z when CS high; required for all transactions |
| SCLK (Pin 19) | Serial clock input | Clocks data in/out; duty cycle 40–60%; sets conversion speed in external clock mode |
| VDD (Pin 20) | Positive supply rail | +5V ±5%; powers analog and digital sections; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended or differential, unipolar or bipolar - eliminates need for external signal conditioning hardware per channel |
| Internal track/hold with 1.5µs acquisition time | Removes requirement for external hold capacitor and simplifies anti-aliasing filter design |
| Three-level SHDN control | Enables dynamic power management: full shutdown between conversions cuts supply current to ≤10µA |
| Reference-buffer amplifier with gain trim | Allows precise system-level gain calibration via REFADJ voltage without trimming resistors |
| 4-wire serial interface compatibility | Direct connection to SPI, QSPI, MICROWIRE, and TMS320 DSPs - no external logic or protocol translation needed |
Applications
| Portable Data Logging | Data-Acquisition Systems |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure over extended field deployments. IC Role / Device Role / Timing Role: Central 12-bit ADC acquiring multi-channel analog sensor outputs with programmable sampling intervals and low-power shutdown between reads. Use Value: 1.5mA active current and ≤10µA shutdown enable >1-year operation on AA batteries; 8-channel integration reduces BOM count and PCB footprint. |
Use Scenario: Rack-mounted industrial DAQ module capturing vibration, current, and voltage waveforms from rotating machinery. IC Role / Device Role / Timing Role: High-fidelity front-end digitizer with 133ksps sampling and 70dB SINAD supporting FFT-based fault analysis. Use Value: 12-bit resolution and ±1 LSB INL ensure accurate amplitude and phase reconstruction; differential inputs reject common-mode noise in noisy plant environments. |
| Medical Instruments | Battery-Powered Instruments |
Use Scenario: Portable ECG monitor digitizing biopotential signals from multiple leads with clinical-grade accuracy. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC performing pseudo-differential measurements with programmable gain and offset cancellation. Use Value: Bipolar input mode (±2.048V) matches ECG signal swing; 80dB THD and 80dB SFDR preserve waveform fidelity for arrhythmia detection algorithms. |
Use Scenario: Handheld multimeter with auto-ranging analog front-end and simultaneous voltage/current/resistance measurement. IC Role / Device Role / Timing Role: Precision ADC providing calibrated 12-bit readings across multiple ranges using external reference and REFADJ gain adjustment. Use Value: External reference support enables traceable calibration; software-selectable unipolar/bipolar modes simplify firmware handling of AC/DC measurements. |
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 |
|---|---|---|---|
| MAX186CCAP | Includes internal 4.096V reference; no external VREF required; identical pinout and timing | Preferred where board space prohibits external reference circuitry; less flexible for system-level calibration | Select MAX186CCAP if reference stability and simplicity outweigh need for external gain trim |
| ADS7822U | 12-bit, 200ksps, SPI-only interface; no differential mode; 2.7–5.25V supply; internal reference only | Lower power (1.25mA), smaller 8-pin SOIC package; lacks bipolar/differential flexibility and SHDN granularity | Choose ADS7822U for cost-sensitive, single-supply, unipolar-only designs requiring minimal footprint |
Compared with MAX186CCAP, MAX188CCAP trades integrated reference for external reference control and REFADJ-based gain scaling-critical for calibrated systems. Against ADS7822U, it offers broader input flexibility and finer power management but in a larger 20-pin SSOP package.
Availability
MAX188CCAP is available at Aetrix Electronics and suitable for portable data logging, industrial data-acquisition systems, and battery-powered medical instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX188CCAP 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 MAX186/MAX188 product line was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems-emphasizing integrated track/hold, flexible input configuration, and serial interface simplicity.
FAQ
What is the reference voltage requirement for MAX188CCAP?
The MAX188CCAP requires an external reference voltage applied to the VREF pin, typically 4.096V. Unlike the MAX186, it does not include an internal reference. The REFADJ pin allows gain adjustment (1.638× REFADJ), and connecting REFADJ to VDD disables the reference buffer. This external reference architecture enables system-level calibration and improved temperature stability in the MAX188CCAP design.
Does MAX188CCAP support differential input mode?
Yes, the MAX188CCAP supports pseudo-differential input mode using channel pairs CH0/CH1, CH2/CH3, CH4/CH5, and CH6/CH7. Configuration is controlled via the SGL/DIF bit in the 8-bit command byte. In differential mode, the device samples the voltage difference between the selected pair, with IN– held stable within ±0.5LSB of AGND during conversion. This capability is confirmed in Tables 3 and 4 of the MAX188CCAP datasheet.
What are the power-down modes available on MAX188CCAP?
The MAX188CCAP offers two software-selectable power-down modes controlled by PD1/PD0 bits in the command byte: fast power-down (30µA) and full power-down (≤10µA). Additionally, the SHDN pin provides hardware-level shutdown: pulling SHDN low forces full power-down regardless of software state. These modes allow aggressive power cycling between conversions-essential for extending battery life in portable MAX188CCAP applications.
Can MAX188CCAP operate with a single +5V supply?
Yes, the MAX188CCAP operates with a single +5V supply (VDD = +5V ±5%, VSS = 0V) for unipolar input configurations. When configured for bipolar operation, it requires dual ±5V supplies (VDD = +5V, VSS = –5V). The analog input common-mode range spans VSS to VDD in both cases, and the device's absolute maximum ratings confirm safe operation under these conditions per the MAX188CCAP datasheet.
What serial interface protocols is MAX188CCAP compatible with?
The MAX188CCAP features a 4-wire serial interface fully compatible with SPI, QSPI, MICROWIRE, and TMS320 DSP interfaces. It uses CS, SCLK, DIN, and DOUT lines with MSB-first, falling-edge data capture. For SPI, CPOL = 0 and CPHA = 0 settings are required. The SSTRB output enables direct synchronization with TMS320 family processors. This multi-protocol support is explicitly documented in the MAX188CCAP General Description and Timing Characteristics sections.
MAX188CCAP 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
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX188CCAP FAQ
1.How can I place an order for MAX188CCAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX188CCAP 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 MAX188CCAP reliable?
The price and inventory of MAX188CCAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX188CCAP is usually 5 days.
3.What payment methods are accepted for MAX188CCAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX188CCAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX188CCAP?
MAX188CCAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX188CCAP 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 MAX188CCAP?
For technical support, including MAX188CCAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX188CCAP requirements.
6.How does Aetrix verify that MAX188CCAP is sourced from the original manufacturer or authorized distributors?
All MAX188CCAP 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 MAX188CCAP meets industry standards.
7.What is the process for return or replacement of MAX188CCAP?
All MAX188CCAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX188CCAP, 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 MAX188CCAP part is unused and in its original packaging.
Return procedure for MAX188CCAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX188CCAP 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…
