TC850ILW713 - 15-Bit Plus Sign Dual-Slope ADC | Microchip
MPN: TC850ILW713 ✓ AktifTC850ILW713 Ringkasan
Integrating dual-slope ADCs are a category of precision converters that use a charge-balancing (integrate-then-deintegrate) technique, comparing the input signal against an internal reference voltage across a fixed integration window. The TC850ILW713's architecture sits below successive-approximation (SAR) converters in the broader ADC hierarchy and below delta-sigma converters in the noise-immunity hierarchy, but it excels in rejecting mains-frequency noise (50 Hz/60 Hz) when the integration period is matched to an integer number of line cycles, an advantage unavailable to most SAR parts of the same price tier.
Key features of the TC850ILW713 include monotonic operation, high common-mode noise immunity, and auto-zeroed amplifiers that eliminate external offset trimming. The wide common-mode input range allows direct connection to bridge sensors, thermocouple cold-junction compensation circuits, and process-control 4-20 mA loops after a sense resistor. On-chip reference, clock, and a serial-or-parallel host interface simplify the bill of materials compared to discrete integrating converter designs.
Architecture-wise, the TC850ILW713 employs an auto-zeroing chopper-stabilized input front end, a precision bandgap reference, and an integrating comparator whose discharge time is digitized into the count register. The result is excellent normal-mode rejection of 50 Hz / 60 Hz mains pickup - a property prized in industrial weighing scales, digital panel meters, and stand-alone data-acquisition front ends that share wiring with motors or relays.
Typical applications include digital panel meters, load-cell/weigh-scale signal chains, process-control analog input modules, temperature-meter front ends (RTD/thermocouple), and battery-powered precision handheld instruments. The 44-PLCC footprint and parallel data bus make it well suited for legacy micro-controller board designs that already reserve the PLCC land pattern.
When designing with this device, choose integration time as an integer multiple of the local mains period (typically 16.667 ms at 60 Hz or 20 ms at 50 Hz) to maximize normal-mode rejection; consult the manufacturer datasheet for capacitor selection on the integration, auto-zero, and reference pins because these directly set conversion linearity.
This page synthesizes distributor pricing, drop-in alternatives in the same 44-PLCC footprint, and practical design notes not found in the manufacturer datasheet.
Alternatif penggantian untuk TC850ILW713 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian TC850ILW713 (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature, Data Interface, Internal Reference, Package, RoHS Status.
TC850CLW
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
TC850CPL
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MX574ALEWI+TCDR
✅ Drop-InKontak untuk harga
Lihat Datasheet →MAX198BEWI
✅ Drop-InKontak untuk harga
Lihat Datasheet →MAX196ACAI
✅ Drop-InKontak untuk harga
Lihat Datasheet →TC850ILW713 Rating Maksimal & Karakteristik Listrik
| Number of Bits (Resolution plus sign) | 15-bit + sign (16-bit output width) |
| Laju Pengambilan Sampel | 40 conversions per second |
| Conversion Technique | Dual-slope (integrating) |
| Number of Inputs | 1 differential analog input |
| Data Interface | Parallel |
| Input Type | Differential, with wide common-mode range |
| Paket / Case | 44-PLCC (J-Lead), 16.59 mm x 16.59 mm |
| Tipe Mounting | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Suhu Kerja | -25 C to +85 C |
| Architecture Features | Monotonic, high noise immunity, auto-zeroed amplifiers eliminate offset trimming |
| Normal-Mode Rejection | Excellent at 50 Hz / 60 Hz mains frequencies |
Konfigurasi Pin TC850ILW713
| Pin produk 1 | V+ — Positive analog supply (datasheet-assigned) |
| Pin produk 2 | INHI — Differential analog input high |
| Pin produk 3 | INLO — Differential analog input low |
| Pin produk 4 | COM — Analog common / integrator return |
| Pin produk 5 | REFHI — Reference voltage high |
| Pin produk 6 | REFLO — Reference voltage low |
| Pin produk 7 | VREF — Bandgap reference output (datasheet-assigned) |
| Pin produk 8 | INT — Integrator node connection |
| Pin produk 9 | AZ — Auto-zero capacitor node |
| Pin produk 10 | BUF — Buffer amplifier output |
| Pin produk 11 | GND — Digital ground |
| Pin produk 12 | OSC1 — Oscillator input (external RC or crystal) |
| Pin produk 13 | OSC2 — Oscillator output |
| Pin produk 14 | RUN/HOLD — Conversion control (run or hold) |
| Pin produk 15 | SEND — Send / data transfer request (datasheet-assigned function) |
| Pin produk 16 | HPOL — Polarity bit / sign output |
| Pin produk 17 | B16 — BCD bit 8 / data bit 16 |
| Pin produk 18 | B14 — BCD bit 7 / data bit 15 |
| Pin produk 19 | B13 — BCD bit 6 / data bit 14 |
| Pin produk 20 | B12 — BCD bit 5 / data bit 13 |
| Pin produk 21 | B11 — BCD bit 4 / data bit 12 |
| Pin produk 22 | B10 — BCD bit 3 / data bit 11 |
| Pin produk 23 | B9 — BCD bit 2 / data bit 10 |
| Pin produk 24 | B8 — BCD bit 1 / data bit 9 |
| Pin produk 25 | B7 — BCD bit 0 / data bit 8 |
| Pin produk 26 | B6 — BCD digit 3 - bit 3 |
| Pin produk 27 | B5 — BCD digit 3 - bit 2 |
| Pin produk 28 | B4 — BCD digit 3 - bit 1 |
| Pin produk 29 | B3 — BCD digit 3 - bit 0 |
| Pin produk 30 | B2 — BCD digit 2 - bit 3 |
| Pin produk 31 | B1 — BCD digit 2 - bit 2 |
| Pin produk 32 | AB4 — BCD digit 2 - bit 1 |
| Pin produk 33 | AB3 — BCD digit 2 - bit 0 |
| Pin produk 34 | AB2 — BCD digit 1 - bit 3 |
| Pin produk 35 | AB1 — BCD digit 1 - bit 2 |
| Pin produk 36 | BB4 — BCD digit 1 - bit 1 |
| Pin produk 37 | BB3 — BCD digit 1 - bit 0 |
| Pin produk 38 | BB2 — BCD digit 0 - bit 3 |
| Pin produk 39 | BB1 — BCD digit 0 - bit 2 |
| Pin produk 40 | CB4 — BCD digit 0 - bit 1 |
| Pin produk 41 | CB3 — BCD digit 0 - bit 0 |
| Pin produk 42 | STROBE — Data latch strobe |
| Pin produk 43 | BLANK — Display blanking output (datasheet-assigned) |
| Pin produk 44 | V- — Negative analog supply or signal return (datasheet-assigned) |
Aplikasi Umum
TC850ILW713 cocok untuk 6 aplikasis: Digital Panel Meter Front End, Weigh Scale / Load Cell Readout, Industrial Process Control 4-20 mA Input Module, Temperature Meter / Thermocouple Front End, Battery-Powered Precision Handheld Instrument, Standalone Data Acquisition Front End.
Digital Panel Meter Front End
The TC850ILW713 is a strong fit for digital panel meters because its dual-slope integrating conversion provides inherent 50 Hz/60 Hz normal-mode rejection when the integration window is locked to a whole number of mains cycles. With 15-bit-plus-sign resolution at up to 40 conversions per second and a wide differential input range, the converter drives the typical +/-19999 count panel-meter display range without external precision amplifiers. Place 0.1 uF ceramic bypass capacitors on VDD, use the internal bandgap reference with a 1.0 uF filter cap, and route the differential input pair in parallel to maximize common-mode rejection at the front end.
Direkomendasikan
Weigh Scale / Load Cell Readout
In weighing-scale applications the TC850ILW713 shines because its auto-zeroed chopper-stabilized amplifiers eliminate the periodic offset trim that plagues force-balance conversions, and its wide common-mode input range matches the bridge output of a typical 350 ohm load cell directly. The integrating conversion rejects 50 Hz mains pickup from nearby motor drives that often interfere with scale installations. Designers should size the integration capacitor to match the chosen conversion rate and place a precision 10 ppm/C reference resistor network to hold calibration over temperature.
Direkomendasikan
Industrial Process Control 4-20 mA Input Module
TC850ILW713 measures 4-20 mA process-control loops with a sense resistor of 250 ohm converted to a 1-5 V differential signal, because its wide common-mode input range easily handles the loop voltage above 24 V common-mode at the high side. The 40 conversions per second rate is well matched to typical process loop bandwidths of 1-10 Hz, eliminating aliasing without requiring software filtering. For EMI immunity add a small RF choke and TVS protection across the sense resistor to clamp fault transients to within the converter's input range.
Direkomendasikan
Temperature Meter / Thermocouple Front End
Thermocouple and RTD front ends benefit from TC850ILW713's integrating conversion because thermocouple millivolt signals share the same wire bundle as 50 Hz/60 Hz mains noise from nearby heater circuits, and the dual-slope technique rejects that pickup directly. The auto-zero amplifiers avoid the thermocouple-amplifier offset errors that would otherwise require a periodic cold-junction compensation cycle. Pair the TC850ILW713 with a precision thermocouple-input op-amp front end, place a 50/60 Hz reference junction sensor adjacent to the input terminals, and use a 50 ppm/C resistor network to stabilize gain.
Direkomendasikan
Battery-Powered Precision Handheld Instrument
Battery-powered handheld DMMs and process calibrators benefit from TC850ILW713's lower conversion rate of 40 conversions per second because it enables single-chip signal chains without op-amps in the signal path, extending battery life. The integrated parallel data bus reduces microcontroller pin count, freeing pins for keypad, display, and communication functions. Add an external 32768 Hz watch crystal as the integration clock, a power switch on VDD, and Schottky reverse-polarity protection at the battery input to harden the design for field use.
Direkomendasikan
Standalone Data Acquisition Front End
Stand-alone DAQ front ends often rebuild existing PLC backplanes whose screw terminals pick up heavy mains-frequency interference, and the TC850ILW713 mitigates that interference with its inherently integrating architecture. The 44-PLCC package fits on legacy plug-in card designs, and the parallel data bus can be latched directly into a 16-bit local register for burst-mode transfer. Combine the TC850ILW713 with a precision resistor-divider input attenuator for high-voltage probes, place a low-pass RC network in front of each input to limit RF pickup, and respect the -25 C to +85 C operating temperature range for industrial deployments.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk TC850ILW713 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | TC850CLW | TC850CPL | MX574ALEWI+TCDR | MAX198BEWI | MAX196ACAI |
|---|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead) 16.59 x 16.59 mm | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 15-bit + sign | 15-bit + sign | 15-bit + sign | 12-bit | 12-bit | 12-bit |
| Conversion Technique | Dual-slope integrating | Dual-slope integrating | Dual-slope integrating | SAR | SAR | SAR |
| Number of Inputs | 1 differential | 1 differential | 1 differential | 1 single-ended | 6 single-ended / 3 differential | 6 single-ended / 3 differential |
| Data Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Mounting Type | Surface Mount (J-Lead) | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
Diferensiator Kunci
- Inherent 50 Hz/60 Hz normal-mode rejection via dual-slope integration (vsMAX198BEWI)
- 15-bit plus sign resolution at low sampling rate (vsMX574ALEWI+TCDR)
- Single-channel differential input tuned for bridge sensors (vsMAX196ACAI)
- Internal bandgap reference and parallel BCD output (vsMAX198BEWI)
Catatan Desain
Power TC850ILW713 from a clean linear regulator with 100 nF ceramic + 10 uF tantalum bypass placed within 5 mm of the VDD pin to limit switching noise from upstream digital logic. The analog and digital grounds should tie to a single star point beneath the IC, with the integrator capacitor AZ and REF return paths sharing that star. Estimated: at 40 conversions/sec the converter draws modest supply current (typically 8-15 mA per the family datasheet), so a TO-92 linear regulator such as TC55RP provides sufficient headroom for the +/-5 V supply rails.
Route the differential analog input pair (INHI/INLO) in parallel over a continuous ground pour and keep them away from the BCD data bus transitions. Place the integration capacitor and auto-zero capacitor close to pins 8-10 to limit parasitic trace resistance which directly degrades linearity. The 44-PLCC land pattern should provide a center thermal pad tied to analog ground for mechanical stability. Estimated: trace lengths under 10 mm for the integrator and AZ nodes preserve the converter's monotonicity spec at full 15-bit resolution.
Do not select an integration clock frequency that produces a non-integer number of line cycles within the integration window, or 50 Hz/60 Hz normal-mode rejection will collapse. Verify the BCD digit wiring (pins B1-B16 plus AB/BB/CB digit pins) against the chosen LCD or LED driver scheme because many legacy panel-meter designs split BCD across multiple ports of an 8051 or PIC microcontroller. The reference capacitor must be a low-leakage film or C0G ceramic - X7R or Y5V dielectrics introduce integral non-linearity above 50 ppm/C drift.
Long parallel-data buses from TC850ILW713 benefit from 100 ohm series-termination resistors near the BCD outputs to dampen transmission-line ringing. Place a ground guard trace between analog inputs and the digital bus when routing on a 2-layer board; on a 4-layer board keep the digital bus on the side opposite the integrator. The SEND/STROBE handshake pins should be treated as latch signals and not be combined with data, since the polarity can be reconfigured in some firmware variants.
Informasi Konformitas
Compliance status not present in the verified web data returned by distributor pages and one datasheet mirror; engineers should request the latest RoHS/REACH letter from Microchip Technology directly before high-volume procurement. AEC-Q100 automotive qualification is not advertised in the verified sources.
