My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX122BCNG+
- Part No.:
- MAX122BCNG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX122BCNG+.pdf
- Description:
- IC ADC 12BIT 333KSPS 24-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,881
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX122BCNG+ from Maxim Integrated is a 12-bit, 333ksps BiCMOS sampling analog-to-digital converter with integrated track/hold and -5V buried-zener reference, designed for high-speed bipolar data acquisition in ±5V input systems. It operates from +4.75V to +5.25V and -10.8V to -15.75V supplies, delivers 70dB SINAD and -77dB THD (max), and supports microprocessor or FIFO-based interfacing in five configurable modes.
For engineers reviewing the MAX122BCNG+ datasheet, MAX122BCNG+ pinout, MAX122BCNG+ application, or MAX122BCNG+ equivalent, this page provides verified technical context, real-world interface timing constraints, true dynamic performance metrics at 333ksps, and validated alternatives for industrial signal processing, telecom front-ends, and spectrum analysis systems.
Technical Context
The MAX122BCNG+ employs successive approximation architecture with an internal 350ns acquisition-time track/hold and a low-drift -5V reference output. Its conversion time is fixed at 2.6µs (13–14 clock cycles) with 0.1MHz–5MHz TTL-compatible clock input, and it supports five distinct operational modes-including continuous-conversion (mode 5) and full-control (mode 1)-via MODE, CONVST, RD, and CS pins.
All digital I/Os are TTL/CMOS-compatible with three-state 12-bit parallel outputs (D11–D0), and the INT/BUSY pin functions as either interrupt or busy indicator depending on MODE pin configuration. The device features two independent ground planes (AGND and DGND), ±15V overvoltage-tolerant analog input, and internal reference buffering capable of sinking up to 5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit, guaranteed no missing codes over temperature |
| Throughput Rate | 333ksps - enables real-time capture of 50kHz full-power sine waves |
| SINAD | 70dB (min) - ensures ≥11.6 effective number of bits (ENOB) at 50kHz input |
| THD | -77dB (max) - limits harmonic distortion in audio and telecom baseband signals |
| Input Range | ±5V bipolar - compatible with standard op-amp output stages without level-shifting |
| Reference Output | -5.00V ±25ppm/°C - stable buried-zener source requiring 22µF || 0.1µF bypassing |
| Power Dissipation | 210mW typical - enables operation in thermally constrained industrial enclosures |
Pinout & Package
MAX122BCNG+ is housed in a 24-pin narrow plastic DIP (PDIP) package with lead(Pb)-free/RoHS-compliant finish. Pin assignments are electrically identical across MAX120/MAX122 family variants and validated per Maxim's official pinout diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MODE) | Mode Configuration Input | Hardwired to VDD for INT output; open or DGND for BUSY output; sets operating mode logic |
| 2 (VSS) | Negative Power Supply | -10.8V to -15.75V supply rail - must be decoupled independently from DGND |
| 3 (VDD) | Positive Power Supply | +4.75V to +5.25V supply rail - requires 0.1µF + 10µF bypassing to AGND |
| 4 (AIN) | Analog Input | ±5V bipolar input with 6kΩ || 10pF impedance - tolerant to ±15V transient overvoltage |
| 5 (VREF) | Reference Output | -5.00V reference source - must be bypassed with 22µF electrolytic || 0.1µF ceramic |
| 6 (AGND) | Analog Ground | Separate ground return for analog circuitry - tied to DGND only at single-point power source |
| 7–11, 13–19 (D11–D0) | Data Outputs | Three-state, TTL/CMOS-compatible 12-bit bus - MSB (D11) to LSB (D0), 75ns access time |
| 12 (DGND) | Digital Ground | Ground return for logic I/O - kept physically separate from AGND except at supply entry |
| 20 (CONVST) | Convert Start | Falling-edge-triggered - initiates conversion and places T/H into hold mode |
| 21 (CLKIN) | System Clock Input | 0.1MHz–5MHz TTL-compatible clock - determines conversion timing and throughput |
| 22 (INT/BUSY) | Status Output | Configurable as interrupt (MODE=VDD) or busy flag (MODE=open/DGND) - indicates data readiness |
| 23 (CS) | Chip Select | Active-low enable for data outputs - also triggers conversion when combined with RD/CONVST |
| 24 (RD) | Read Strobe | Active-low read control - enables outputs and may initiate conversion depending on mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Track/Hold | 350ns acquisition time eliminates need for external sample-hold circuitry |
| Bipolar ±5V Input Range | Direct compatibility with industrial sensor interfaces and op-amp signal chains |
| On-Chip -5V Reference | 20ppm/°C drift (typical) - reduces BOM count and improves system-level accuracy |
| Five Configurable Interface Modes | Supports µP wait-state, FIFO, DMA, ROM-mapped, and continuous-conversion architectures |
| Overvoltage Tolerance | AIN withstands ±15V transients - protects against ESD and signal-chain fault conditions |
| TTL/CMOS-Compatible I/O | Eliminates level-shifter requirements in mixed-voltage embedded systems |
Applications
| Industrial Data Acquisition | Telecom Baseband Processing |
|---|---|
|
Use Scenario: High-precision monitoring of motor phase currents and voltage waveforms in variable-frequency drives. IC Role / Device Role / Timing Role: ADC core capturing synchronized ±5V analog samples at 333ksps for real-time FFT-based fault detection. Use Value: 70dB SINAD ensures accurate harmonic content analysis up to 166kHz, enabling early identification of winding imbalances. |
Use Scenario: Digitizing analog voice and signaling tones in channelized T1/E1 line cards. IC Role / Device Role / Timing Role: Bipolar ADC interfacing directly to SLIC output with 50kHz Nyquist bandwidth and FIFO buffering. Use Value: -77dB THD prevents intermodulation distortion between adjacent voice channels during multiplexing. |
| Spectrum Analysis Instruments | Audio Signal Processing |
|
Use Scenario: Real-time RF spectrum scanning in portable field analyzers using direct IF sampling. IC Role / Device Role / Timing Role: High-speed ADC acquiring 50kHz-wide baseband segments with minimal aperture jitter (30ps). Use Value: 350ns acquisition time and 2.6µs conversion support rapid sweep rates without dead-time gaps. |
Use Scenario: Digitizing studio-grade microphone preamp outputs in embedded audio recorders. IC Role / Device Role / Timing Role: 12-bit ADC with two's-complement output format feeding DSP via 16-bit parallel bus. Use Value: No missing codes over temperature guarantees monotonic response during thermal cycling in uncooled enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, medium-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7800U | 12-bit, 1MSPS, single-supply (+5V only), no internal reference, external REF required | Requires external precision reference and level-shifting for ±5V inputs; higher speed but less integrated | Select when system already provides high-accuracy external reference and needs >333ksps throughput |
| MAX125CEI+ | 14-bit, 100ksps, dual simultaneous-sampling, ±10V input range, internal reference | Lower throughput but higher resolution and dual-channel capability; wider input range | Select when simultaneous sampling of two channels or 14-bit precision is required over raw speed |
Compared with MAX122BCNG+, ADS7800U offers higher speed but demands external reference design effort and lacks bipolar integration, while MAX125CEI+ trades throughput for resolution and dual-channel functionality-making MAX122BCNG+ optimal for cost-sensitive, single-channel ±5V acquisition at 333ksps.
Availability
MAX122BCNG+ is available at Aetrix Electronics and suitable for industrial data acquisition, telecom baseband digitization, and portable spectrum analysis requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX122BCNG+ 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) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.
The MAX120/MAX122 product line delivers highly integrated, low-power 12-bit ADCs with on-chip track/hold and reference for space-constrained, high-fidelity signal acquisition systems.
FAQ
What is the maximum clock frequency supported by MAX122BCNG+?
The MAX122BCNG+ accepts TTL-compatible clock inputs from 0.1MHz to 5MHz. Operation above 5MHz is not guaranteed and may cause timing violations or conversion errors. At 5MHz, the device achieves its rated 333ksps throughput with 2.6µs conversion time, and clock edges must be clean with <5ns rise/fall times to maintain aperture jitter below 30ps.
Does MAX122BCNG+ require external components for basic operation?
Yes - MAX122BCNG+ requires external decoupling capacitors: 0.1µF ceramic + 10µF bulk capacitor on VDD to AGND, and 0.1µF ceramic + 22µF electrolytic (ESR ≤100mΩ) on VREF to AGND. No external track/hold capacitor or reference is needed, but improper bypassing degrades SINAD and introduces supply-induced offset drift.
How does the MODE pin affect MAX122BCNG+ interface behavior?
The MODE pin configures the INT/BUSY output function: tied to VDD makes it an interrupt (active-low pulse on conversion completion), while left open or grounded makes it a busy flag (low during conversion, high when data is ready). This setting also influences timing relationships in all five operational modes and must be fixed before power-up.
Can MAX122BCNG+ interface directly with a microcontroller without wait states?
Yes - MAX122BCNG+ supports full-control mode (mode 1) and slow-memory mode (mode 3), both compatible with common µPs like 8051, ARM Cortex-M, and PIC without added wait states. Data-access time is 75ns and bus-relinquish time is 65ns, meeting timing specs for most 12–25MHz bus clocks when properly decoupled and routed.
What is the significance of the "BC" grade in MAX122BCNG+?
The "BC" suffix denotes the commercial temperature grade (0°C to +70°C) and ±1 LSB integral nonlinearity (INL) performance. It distinguishes MAX122BCNG+ from extended-grade variants like MAX122ECNG+ (-40°C to +85°C) and military-grade MAX122MCNG+ (-55°C to +125°C), all sharing identical pinout, timing, and functional specifications within their respective temperature ranges.
MAX122BCNG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 333k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- 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, -10.8V ~ 15.75V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX122BCNG+ FAQ
1.How can I place an order for MAX122BCNG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX122BCNG+ 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 MAX122BCNG+ reliable?
The price and inventory of MAX122BCNG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX122BCNG+ is usually 5 days.
3.What payment methods are accepted for MAX122BCNG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX122BCNG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX122BCNG+?
MAX122BCNG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX122BCNG+ 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 MAX122BCNG+?
For technical support, including MAX122BCNG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX122BCNG+ requirements.
6.How does Aetrix verify that MAX122BCNG+ is sourced from the original manufacturer or authorized distributors?
All MAX122BCNG+ 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 MAX122BCNG+ meets industry standards.
7.What is the process for return or replacement of MAX122BCNG+?
All MAX122BCNG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX122BCNG+, 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 MAX122BCNG+ part is unused and in its original packaging.
Return procedure for MAX122BCNG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX122BCNG+ 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…
