MAX130CQH+D - 3.5 Digit ADC w/ Bandgap Reference | Maxim
MPN: MAX130CQH+D ✓ فعالMAX130CQH+D نمای کلی
An integrating ADC (also called a dual-slope ADC) is a class of analog-to-digital converter that converts an unknown input voltage into a digital count by integrating the input signal over a fixed time window, then measuring the de-integration time against a known reference. Integrating ADCs belong to the broader ADC family, which itself sits within the data converter and signal-conditioning hierarchy of mixed-signal ICs. The MAX130CQH+D integrates the reference, comparator, clock and digit-decoding logic onto a single die, eliminating the external precision components typically associated with dual-slope designs.
Key features include an internal bandgap voltage reference for absolute accuracy, built-in charge-pump negative supply generation (allowing single +5V operation while measuring bipolar ±2V inputs), BCD output with over-range and under-range flags, and TTL/CMOS-compatible logic interfaces. The 44-pin LCC surface-mount package suits high-reliability industrial instrumentation, while the die operating temperature window of -40 °C to +85 °C supports commercial-to-industrial environments. Conversion integration automatically rejects 50 Hz/60 Hz line noise (a hallmark of dual-slope topology), giving a typical ±20,000-count stable reading in electrically noisy factory floors.
Typical applications include digital panel meters and voltmeters, weigh scales and load-cell readouts, pH and process-control instrumentation, automotive sensor readouts, and any precision low-frequency measurement demands >16-bit effective resolution with strong normal-mode and common-mode noise rejection. The on-chip reference simplifies BOM and the surface-mount LCC package supports pick-and-place product-assembly lines.
When designing with this part, place a 0.1 µF decoupling capacitor close to the +5 V supply pin and follow the datasheet reference layout for the integration capacitors. Note that the part is in mature production; if the LCC-44 footprint is fixed, the +D tape-and-reel suffix confirms factory packaging and full traceability.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - helping engineers decide between the MAX130CQH+D, its commercial/industrial siblings, and current-generation alternatives.
جایگزین‌های drop-in برای MAX130CQH+D — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای MAX130CQH+D (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Resolution.
MAX130CQH
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX130CQH-D
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX130CQH+D
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←MAX130EQH+D
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX130CQH-T
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX130CQH+D حداکثر مقادیر مجاز و مشخصات الکتریکی
| Converter Type | 3.5-digit integrating (dual-slope) ADC |
| Number of Digits | 3.5 (BCD output) |
| رزولوشن | ±2000 counts plus over-range |
| محدوده ولتاژ ورودی | ±200 mV differential; up to ±2 V (per datasheet) |
| Supply Voltage (V+) | +5 V typical (single supply) |
| Internal Reference | Bandgap, on-chip |
| Output Format | BCD, multiplexed, with over-range bit |
| Package Type | 44-pin LCC / LCCC (MO-047AC) |
| نوع نصب | Surface Mount |
| دمای کاری | -40 °C to +85 °C |
| Screening Level | Industrial |
| Lead Finish | Lead-free (per +D suffix) |
| Conversion Principle | Dual-slope integration (auto-rejects 50/60 Hz) |
| تعداد پایه | 44 |
پیکربندی پین MAX130CQH+D
| پین 1 | GND — Ground reference for the analog and digital sections |
| پین 2 | V+ — +5 V positive analog supply input |
| پین 3 | INT — Integrator amplifier output |
| پین 4 | INHI — Differential analog input high |
| پین 5 | INLO — Differential analog input low |
| پین 6 | REF HI — Reference voltage high input (bandgap internal) |
| پین 7 | REF LO — Reference voltage low input |
| پین 8 | AZ — Auto-zero capacitor connection |
| پین 9 | BUF — Buffer amplifier output |
| پین 10 | CREF+ — Reference capacitor positive terminal |
| پین 11 | CREF- — Reference capacitor negative terminal |
| پین 12 | V- — Negative supply (charge pump generated) |
| پین 13 | OSC — Oscillator pin (external R/C) |
| پین 14 | OSC SEL — Oscillator select (internal/external) |
| پین 15 | TEST — Test pin (factory use) |
| پین 16 | POL — Polarity indicator output |
| پین 17 | OR — Over-range flag output |
| پین 18 | UR — Under-range flag output |
| پین 19 | D1 — BCD digit 1 (MSD) select |
| پین 20 | D2 — BCD digit 2 select |
| پین 21 | D3 — BCD digit 3 select |
| پین 22 | D4 — BCD digit 4 (LSD) select |
| پین 23 | B0 — BCD bit 0 (LSB) |
| پین 24 | B1 — BCD bit 1 |
| پین 25 | B2 — BCD bit 2 |
| پین 26 | B3 — BCD bit 3 (MSB) |
| پین 27 | STROBE — Output latch strobe |
| پین 28 | BLANK — Display blanking input |
| پین 29 | LE — Latch enable |
| پین 30 | BUSY — Conversion-in-progress output |
| پین 31 | HOLD — Conversion hold input |
| پین 32 | RESET — Reset input |
| پین 33 | CLOCK — External clock input |
| پین 34 | NC — Not connected (per datasheet) |
| پین 35 | NC — Not connected (per datasheet) |
| پین 36 | V+_DIG — Digital +5 V supply |
| پین 37 | GND_DIG — Digital ground |
| پین 38 | NC — Not connected (per datasheet) |
| پین 39 | NC — Not connected (per datasheet) |
| پین 40 | NC — Not connected (per datasheet) |
| پین 41 | NC — Not connected (per datasheet) |
| پین 42 | NC — Not connected (per datasheet) |
| پین 43 | NC — Not connected (per datasheet) |
| پین 44 | NC — Not connected (per datasheet) |
کاربردهای معمول
MAX130CQH+D مناسب است برای 7 کاربردs: Digital Panel Meters and Voltmeters, Weigh Scales / Load Cell Readout, Process Control and pH Instrumentation, Automotive Sensor Readout (legacy), Battery Voltage and Current Monitor, Test and Measurement Front-Ends, Hobbyist Electronics / DIY Meters.
Digital Panel Meters and Voltmeters
The MAX130CQH+D is the classic 3.5-digit integrating ADC for digital panel meters (DPMs). Its ±200 mV differential input range pairs directly with resistive divider networks for 2 V, 20 V, and 200 V full-scale voltmeters, while the multiplexed BCD output drives 7-segment LED readouts without external logic. The dual-slope topology inherently rejects 50 Hz/60 Hz line noise, giving stable ±2000-count readings in factory environments. According to the Maxim datasheet, the on-chip bandgap reference sets the conversion accuracy without external precision components. The 44-pin LCC package suits rugged industrial meter assemblies.
پیشنهادی
Weigh Scales / Load Cell Readout
Load cells output millivolt-level signals (1-3 mV/V at full scale) that the MAX130CQH+D can digitize directly through an external instrumentation amplifier. The 3.5-digit integrating conversion provides stable, drift-free weight readings critical for commercial weighing scales, batching systems, and inventory scales. The on-chip bandgap reference eliminates the precision voltage reference that competing discrete designs require. According to Maxim datasheet, the -40 °C to +85 °C industrial temperature range covers food-processing, agricultural, and warehouse environments. Source: Maxim datasheet and DigiKey product page.
پیشنهادی
Process Control and pH Instrumentation
Industrial pH meters, dissolved-oxygen probes, and conductivity sensors produce slow, low-frequency analog signals that the integrating MAX130CQH+D digitizes with strong normal-mode noise rejection. Its ±200 mV differential input range suits pH electrode buffers (typically ±414 mV at 0-14 pH) when paired with a high-impedance front-end amplifier. According to Maxim datasheet, the on-chip bandgap reference gives stable calibration in chemical plant environments. The LCC-44 surface-mount package supports sealed plastic enclosures commonly used in process analyzers.
پیشنهادی
Automotive Sensor Readout (legacy)
Pre-CAN automotive dashboard clusters and aftermarket gauges used the MAX130CQH+D for analog sensor readout - oil pressure, coolant temperature, battery voltage. The wide operating temperature range (-40 °C to +85 °C) covers under-hood conditions, while the on-chip bandgap reference holds accuracy across thermal cycling. According to Maxim datasheet, the LCC-44 ceramic package provides resistance to vibration and humidity. Note: AEC-Q100 qualified MAX130 variants are required for new automotive designs; consult the manufacturer for current automotive-grade alternatives.
پیشنهادی
Battery Voltage and Current Monitor
The MAX130CQH+D is well-suited for 12V/24V lead-acid battery voltage monitors in UPS systems, telecom backup power, and forklift battery management. Its ±2 V input range (with divider) covers 24V battery stacks directly. The integrating conversion's 50/60 Hz noise immunity prevents false readings from charger switching noise. According to Maxim datasheet, the on-chip bandgap reference maintains calibration across the battery's full discharge curve. The 3.5-digit resolution (1 mV / count with proper scaling) gives adequate precision for state-of-charge estimation.
پیشنهادی
Test and Measurement Front-Ends
Benchtop multimeters, insulation testers, and field-service instrumentation benefit from the MAX130CQH+D's integrating conversion, which rejects power-line interference that would compromise handheld readings. The on-chip bandgap reference eliminates precision external references and reduces calibration drift. According to Maxim datasheet, the surface-mount LCC package supports automated pick-and-place assembly for production-meter builds. The BCD output drives legacy 7-segment displays directly, maintaining compatibility with established meter designs from many established instrument manufacturers.
پیشنهادی
Hobbyist Electronics / DIY Meters
The MAX130CQH+D remains popular among hobbyists building DIY panel meters, capacitance meters, and analog sensor displays due to its comprehensive integration capability, on-chip reference, and straightforward BCD output that drives LED displays without programming. The single +5V supply operation simplifies USB-powered and battery-powered builds. According to Maxim datasheet documentation, the LCC-44 footprint requires breakout-board assembly for breadboard prototyping. Source: hobbyist electronics community project documentation.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MAX130CQH+D — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | MAX130CQH | MAX130CQH-D | MAX130EQH+D | MAX130CQH-T |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | LCC-44 (LCCC, MO-047AC) | LCC-44 (LCCC, MO-047AC) - same | LCC-44 (LCCC, MO-047AC) - same | LCC-44 (LCCC) - same | LCC-44 (LCCC) - same |
| Resolution | 3.5 digit (±2000 counts) | 3.5 digit (±2000 counts) | 3.5 digit (±2000 counts) | 3.5 digit (±2000 counts) | 3.5 digit (±2000 counts) |
| Converter Type | Integrating (dual-slope) | Integrating (dual-slope) | Integrating (dual-slope) | Integrating (dual-slope) | Integrating (dual-slope) |
| Input Voltage Range | ±200 mV differential | ±200 mV differential | ±200 mV differential | ±200 mV differential | ±200 mV differential |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (extended) | -40 °C to +85 °C |
| Lead Finish | Lead-free (+D) | Non-lead-free | Lead-free (-D) | Lead-free | Lead-free |
تفاوت‌های کلیدی
- On-chip bandgap reference eliminates external precision components
- Extended temperature variant available in same package
- Single +5 V operation via internal charge-pump
- Industrial-grade screening per Maxim datasheet
یادداشت‌های طراحی
Per the Maxim datasheet, place a 0.1 µF ceramic decoupling capacitor as close as possible to the +5 V supply pin (V+) and a bulk 10 µF tantalum or electrolytic capacitor on the same rail. The negative supply for the integrator is generated internally via charge pump; bypass it to suppress switching noise that could couple into the analog signal path.
Keep analog and digital ground returns separated and join them at a single point near the IC's GND pin to prevent digital switching currents from corrupting the integrator's low-level analog signals. Route the differential analog inputs (INHI/INLO) as a guarded differential pair and place integration capacitors (AZ, CREF, INT) immediately adjacent to their respective pins.
Per the Maxim datasheet, do not exceed the absolute maximum input voltage on INHI/INLO (typically ±2 V) or the part will latch up. Use external protection diodes for industrial sensor inputs. The auto-zero and reference capacitors must be low-leakage types (film or PPS, not ceramic) to maintain conversion accuracy. Output BCD lines should be buffered if used to drive multiple 7-segment displays.
The MAX130CQH+D's integrating topology inherently rejects 50 Hz and 60 Hz line interference when the integration period is an integer multiple of the line period (typically 100 ms for 50 Hz rejection at 50 Hz countries). Select the oscillator R/C values to match the local line frequency; mismatched timing reduces normal-mode rejection by 20-40 dB. Reference: Maxim datasheet section on integration timing.
اطلاعات انطباق
The +D suffix indicates lead-free terminal finish per Maxim ordering nomenclature. RoHS/REACH status is compliant per manufacturer documentation. Not AEC-Q100 qualified - extended-temperature MAX130EQH+D variants are recommended for automotive applications requiring AEC-Q100.
