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Microchip Technology TC850ILW713
- Part No.:
- TC850ILW713
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
TC850ILW713.pdf
- Description:
- IC ADC 15BIT DUAL SLOPE 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,925
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Product details
Overview
TC850ILW713 from Microchip Technology is a 15-bit plus sign monolithic CMOS integrating analog-to-digital converter (ADC) with chopper-stabilized amplifiers, multiple-slope conversion architecture, and ±5V dual-supply operation. It delivers up to 40 conversions per second, 96 dB dynamic range, and 30 pA input bias current - enabling direct sensor interface in precision DC measurement systems such as digital scales and industrial instrumentation.
For engineers reviewing the TC850ILW713 datasheet, TC850ILW713 pinout, TC850ILW713 application, or TC850ILW713 equivalent, this page provides verified technical context, real-world timing behavior, bus interface constraints, noise immunity characteristics, and validated alternative options for high-accuracy analog signal acquisition.
Technical Context
The TC850ILW713 implements a multiple-slope integrating ADC architecture with auto-zeroed chopper-stabilized buffer and integrator amplifiers. Its conversion cycle comprises three phases - zero integrator (246 clocks), signal integrate (256 clocks), and reference integrate (778 clocks) - totaling 1280 internal clock cycles per conversion at 61.44 kHz oscillator frequency.
It uses two differential voltage references (VREF1 and VREF2 = VREF1/64) to enable fast-slow de-integration: 512 clocks for 9-bit resolution followed by 64 clocks for additional 6-bit resolution. The device supports both continuous and on-demand conversion modes via CONT/DEMAND control, with BUSY output signaling end-of-conversion and enabling µP interrupt-driven data capture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 15-bit + sign bit (±32,767 counts); enables 100 µV LSB sensitivity without external amplification |
| Conversion Rate | Up to 40 conversions/second; 16× faster than prior 15-bit monolithic integrating ADCs |
| Dynamic Range | 96 dB; supports high-fidelity DC measurements with minimal quantization noise |
| Input Bias Current | 30 pA typical; allows direct connection to high-impedance sensors (e.g., strain gauges, thermistors) |
| Input Noise | 30 µVP-P; ensures stable readings in noisy industrial environments without external filtering |
| Supply Voltage | ±5 V; dissipates only 20 mW - compatible with standard dual-rail analog power domains |
| Common-Mode Rejection | 80 dB typical; rejects interference when IN+ and IN− share common-mode offset |
Pinout & Package
TC850ILW713 is housed in a 44-pin PLCC (Plastic Leaded Chip Carrier) package rated for –25°C to +85°C operation. Pin assignments follow Microchip's standardized 44-pin PLCC layout with dedicated analog, reference, clock, and 8-bit µP-compatible bus terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Differential analog input | High-impedance inputs accepting ±3.2768 V full-scale differential signals; CMRR ≥80 dB |
| REF1+, REF−, REF2+ | Dual differential reference inputs | VREF1 sets primary scale (e.g., 1.6384 V); VREF2 = VREF1/64 enables fast-slow de-integration |
| OSC1, OSC2 | Crystal oscillator interface | Supports 61.44 kHz crystal; internal ÷4 divider yields 15.36 kHz system clock for 1280-cycle conversions |
| CS, CE, RD, WR | µP bus interface controls | CMOS-compatible chip-select (CS active HIGH), chip-enable (CE active LOW), read/write strobes |
| DB0–DB7, BUSY | Data bus and status output | 3-state TTL/CMOS outputs; BUSY falling edge signals valid data and can trigger µP interrupt |
| CONT/DEMAND, L/H, OVR/POL | Mode and data formatting controls | Selects continuous vs. on-demand mode; selects high/low byte or overrange/polarity bit on DB7 |
Key Features
| Feature | Design Value |
|---|---|
| Multiple-slope integration | Reduces de-integrate time to 576 clocks (vs. 32,768 in classic dual-slope), enabling 40 cps at 15-bit resolution |
| Auto-zeroed chopper amplifiers | Eliminates need for external zero-adjust potentiometers; guarantees zero digital output at 0 V analog input |
| Flexible µP interface | 8-bit 3-state bus with dual chip enables, data-valid BUSY output, and memory-mapped read protocol |
| High noise immunity | Integrating architecture inherently averages out high-frequency noise; no external anti-aliasing filter required |
| Extended overrange capability | Supports analog inputs up to +192 LSB beyond full scale (e.g., 3.2958 V for 3.2768 V FS), enabling digital offset nulling |
Applications
| Digital Weighing Scales | Precision Sensor Interface |
|---|---|
|
Use Scenario: High-resolution weight measurement in commercial and industrial scales using load-cell bridges. IC Role / Device Role / Timing Role: Primary ADC acquiring differential bridge output; performs on-demand conversions triggered by user action or stabilization detection. Use Value: 15-bit + sign resolution and 30 pA input bias enable direct connection to mV-level bridge outputs without gain stages; 40 cps rate supports responsive display updates. |
Use Scenario: Low-drift temperature or pressure sensing in environmental monitoring equipment. IC Role / Device Role / Timing Role: Precision analog front-end digitizing outputs from RTDs, thermistors, or piezoresistive sensors. Use Value: Auto-zeroed amplifiers and 96 dB dynamic range suppress thermal drift and supply noise; 30 µVP-P input noise preserves small-signal integrity. |
| Industrial DC Data Acquisition | Battery-Test Equipment |
|
Use Scenario: Calibration-grade voltage/current logging in programmable power supplies and test benches. IC Role / Device Role / Timing Role: High-accuracy DC measurement subsystem capturing stable analog values under controlled conditions. Use Value: ±0.5 LSB end-point linearity error and 2 ppm/°C full-scale gain drift ensure traceable metrology-grade results across temperature. |
Use Scenario: Cell voltage monitoring during charge/discharge cycling in battery formation and aging systems. IC Role / Device Role / Timing Role: Integrating ADC rejecting switching noise from adjacent DC-DC converters and motor drivers. Use Value: Inherent noise immunity eliminates need for complex shielding or synchronous sampling; ±5 V supply matches common test-system rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-accuracy integrating ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7730BRUZ | 24-bit sigma-delta ADC; higher resolution but slower (10–125 sps), requires external reference and clock | Used in weigh scales requiring >16-bit resolution; lacks integrated oscillator and auto-zero circuitry | Choose AD7730BRUZ when ultimate resolution outweighs speed and board space; TC850ILW713 offers faster throughput with simpler BOM. |
| MAX134ACPP | 18-bit dual-slope ADC; 10 sps max, ±15 V supply, no integrated oscillator, larger 28-pin DIP package | Legacy industrial panel meters; requires external timing components and zero calibration | Choose MAX134ACPP for legacy replacement where ±15 V supplies exist; TC850ILW713 reduces component count and improves noise rejection. |
Compared with AD7730BRUZ and MAX134ACPP, the TC850ILW713 uniquely balances 15-bit accuracy, 40 sps speed, integrated oscillator, auto-zeroing, and ±5 V operation - making it optimal for cost-sensitive, noise-prone, µP-based DC measurement systems needing rapid deployment and minimal external components.
Availability
TC850ILW713 is available at Aetrix Electronics and suitable for digital weighing systems, precision sensor interfaces, industrial DC data acquisition, battery-test equipment, and calibration-grade instrumentation requiring stable component supply and long-term manufacturability.
Supply support for TC850ILW713 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
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and mixed-signal ICs, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The TC850ILW713 belongs to Microchip's precision integrating ADC product line, designed specifically for high-accuracy, low-noise DC measurement applications where auto-zeroing, wide dynamic range, and µP-friendly interface are critical.
FAQ
What is the maximum conversion rate of the TC850ILW713?
The TC850ILW713 achieves up to 40 conversions per second using its multiple-slope integration technique. This is enabled by a 1280-clock-cycle conversion cycle at a 61.44 kHz oscillator frequency (yielding ~47.8 Hz system clock after ÷4 division). The rate assumes optimal external component selection and stable ±5 V supplies.
Does the TC850ILW713 require external zero calibration?
No, the TC850ILW713 does not require external zero calibration. Its chopper-stabilized input buffer and integrator amplifiers are auto-zeroed internally during each conversion's zero-integrator phase. This guarantees zero digital output at 0 V differential input without trim pots or software calibration routines - a key feature confirmed in DS21479D-page 2 and page 8.
How is the 15-bit result transferred over the 8-bit bus of the TC850ILW713?
The TC850ILW713 transfers its 15-bit result plus sign and overrange bits across three sequential 8-bit reads in Continuous mode, or via multiplexed byte selection in Demand mode. In Demand mode, L/H and OVR/POL pins control whether DB0–DB7 carry the low byte, high byte (with polarity on DB7), or high byte (with overrange on DB7). Full details are specified in Table 6-1 of DS21479D.
What reference voltage configuration is required for proper operation of the TC850ILW713?
The TC850ILW713 requires two differential reference voltages: VREF1 applied between REF1+ and REF−, and VREF2 = VREF1/64 applied between REF2+ and REF−. Typical values are VREF1 = 1.6384 V and VREF2 = 25.6 mV. CREF1 and CREF2 capacitors must be connected as shown in Figure 1-1; VREF2 tolerance should be ≤0.5% to maintain 15-bit linearity.
Can the TC850ILW713 operate with an external clock instead of a crystal?
Yes, the TC850ILW713 supports external clock operation. Drive OSC1 with a CMOS-level square wave (0 V to VDD), leave OSC2 unconnected, and ensure the signal meets timing requirements in DS21479D-page 4 (e.g., minimum pulse width). The internal ÷4 divider applies to both crystal and external clock sources, preserving consistent 1280-cycle conversion timing.
TC850ILW713 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 15
- Sampling Rate (Per Second):
- 40
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Dual Slope
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- -
- Operating Temperature:
- -25°C ~ 85°C
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
TC850ILW713 FAQ
1.How can I place an order for TC850ILW713 through Aetrix?
Please submit a Request for Quotation (RFQ) for TC850ILW713 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 TC850ILW713 reliable?
The price and inventory of TC850ILW713 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC850ILW713 is usually 5 days.
3.What payment methods are accepted for TC850ILW713?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC850ILW713 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TC850ILW713?
TC850ILW713 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TC850ILW713 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 TC850ILW713?
For technical support, including TC850ILW713 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC850ILW713 requirements.
6.How does Aetrix verify that TC850ILW713 is sourced from the original manufacturer or authorized distributors?
All TC850ILW713 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 TC850ILW713 meets industry standards.
7.What is the process for return or replacement of TC850ILW713?
All TC850ILW713 units undergo pre-shipment inspection (PSI). If there is an issue with TC850ILW713, 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 TC850ILW713 part is unused and in its original packaging.
Return procedure for TC850ILW713:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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