ADS7807UBE4 - 16-Bit 40kHz SAR ADC, 28-SOIC | Texas Instruments
Référence : ADS7807UBE4 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $13.1 | $131,00 |
| 100 | $11.55 | $1 155,00 |
| 500 | $10.2 | $5 100,00 |
| 1 000 | $9.05 | $9 050,00 |
ADS7807UBE4 Présentation
What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision converter type that uses a binary-search algorithm against an internal DAC to resolve an analog input one bit per conversion cycle. SAR ADCs sit in the precision data-converter hierarchy between delta-sigma converters (which trade speed for resolution) and flash converters (which trade resolution for speed), making the SAR topology the workhorse choice for 12-18 bit industrial, instrumentation, and data-acquisition applications where both resolution and deterministic latency matter.
Key features include 35 mW maximum power dissipation, 50 uW power-down mode for battery-friendly duty-cycled operation, 25 us maximum acquisition-and-conversion time (yielding ~40 kSPS throughput), +/-1.5 LSB maximum INL, guaranteed 16-bit no-missing-codes DNL, and 86 dB minimum SINAD with a 1 kHz input. The pin-compatible 12-bit ADS7806 and the older pin-compatible 12-bit ADS7805 allow resolution migration on the same PCB layout.
Internally, the ADS7807 uses a charge-redistribution capacitive DAC array for the SAR conversion, with the internal 2.5V reference driving the binary-weighted capacitor network. The converter offers both a serial (SPI/QSPI/MICROWIRE-compatible) interface and a parallel (8/16-bit) data bus, multiplexed on the same pins, enabling flexible MCU or DSP hook-up without external glue logic. A hardware BYS pin lets the user bypass the internal reference when system-level ratiometric accuracy is required.
Typical applications include industrial process-control analog input modules, multi-channel data-acquisition (DAQ) boards, weigh-scale front ends, pen-trace digitizers, portable medical instrumentation, and precision sensor signal chains. The wide bipolar +/-10V input range also makes the part a strong fit for retrofit of legacy 12-bit +/10V systems that need higher resolution without changing the front-end scaling.
When designing with the ADS7807UBE4, note that the part draws ~7 mA from +5V during conversion and drops to ~10 uA in power-down; therefore, the application logic should gate BUSY/R/C and shutdown for thermal and battery optimization. A 10 uF (minimum) tantalum plus 0.1 uF ceramic at +VANA and +VAND is recommended close to the pins to keep the reference regulator noise off the conversion floor.
This page synthesizes distributor pricing, drop-in alternative analysis, and practical PCB/thermal notes that go well beyond what the manufacturer datasheet reproduces on its own.
Alternatives de remplacement direct pour ADS7807UBE4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADS7807UBE4 (même facteur de forme et même empreinte) — différant par Data Interface, Package, Sampling Rate, Architecture, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADS7807PBG4
✅ Remplacement direct✓ En stock
$11.85 / unité
Voir la fiche technique →ADS8507IBDW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS8507IDW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS7825U/1K
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD976ANZ
✅ Remplacement direct✓ En stock
$22.1 / unité
Voir la fiche technique →ADS7807UBE4 Valeurs maximales et caractéristiques électriques
| Résolution | 16 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 single-ended |
| Fréquence d'échantillonnage | 40 kSPS (max) |
| Conversion Time (Acquisition + Conversion) | 25 us (max) |
| Input Voltage Ranges | +/-10 V, 0 V to +5 V, 0 V to +4 V |
| Tension d'alimentation | +5 V single supply |
| Supply Current (active) | 7 mA (typ) / 35 mW (max dissipation) |
| Power-Down Current | 50 uW (max) |
| INL (Non-linéarité intégrale) | +/-1.5 LSB (max) |
| DNL (Differential Nonlinearity) | 16 bits, no missing codes (guaranteed) |
| SINAD (1 kHz input) | 86 dB (min) |
| Data Interface | Serial (SPI/QSPI/MICROWIRE) or Parallel (8/16-bit) |
| Internal Reference | 2.5 V (internal, BYS pin to bypass) |
| Plage de température de fonctionnement | -40C to +85C |
| Boîtier | 28-SOIC (DW), 0.295" (7.50 mm) body width |
| Type de montage | Surface Mount |
| Packaging Option (E4 suffix) | Tape and Reel |
| Statut RoHS | Compliant |
Configuration des broches de ADS7807UBE4
| Broche 1 | AIN — Analog input |
| Broche 2 | VANA — Analog +5V supply |
| Broche 3 | VREF — Reference voltage (2.5V nominal, BYS to bypass) |
| Broche 4 | AGND — Analog ground |
| Broche 5 | BYS — Reference bypass/select (tie high for internal ref) |
| Broche 6 | R1 — Input range select bit 1 |
| Broche 7 | R0 — Input range select bit 0 |
| Broche 8 | CS — Chip select (active low) |
| Broche 9 | R/C — Read/Convert control (active low to start conversion) |
| Broche 10 | BUSY — Output, high during conversion |
| Broche 11 | DGND — Digital ground |
| Broche 12 | DB0/DATA — Data bit 0 (LSB) / serial data |
| Broche 13 | DB1 — Data bit 1 |
| Broche 14 | DB2 — Data bit 2 |
| Broche 15 | DB3 — Data bit 3 |
| Broche 16 | DB4 — Data bit 4 |
| Broche 17 | DB5 — Data bit 5 |
| Broche 18 | DB6 — Data bit 6 |
| Broche 19 | DB7 — Data bit 7 |
| Broche 20 | DB8 — Data bit 8 |
| Broche 21 | DB9 — Data bit 9 |
| Broche 22 | DB10 — Data bit 10 |
| Broche 23 | DB11 — Data bit 11 |
| Broche 24 | DB12 — Data bit 12 |
| Broche 25 | DB13 — Data bit 13 |
| Broche 26 | DB14 — Data bit 14 |
| Broche 27 | DB15 — Data bit 15 (MSB) |
| Broche 28 | VAND — Digital +5V supply |
Applications typiques
ADS7807UBE4 convient pour 6 applications: Industrial Data-Acquisition Front End, Precision Weigh-Scale / Load-Cell Digitizer, Medical Instrumentation Front End, Pen-Trace Digitizer / Chart-Recorder Replacement, Seismic / Vibration Monitoring, Process-Control Loop Input Module.
Industrial Data-Acquisition Front End
The ADS7807UBE4's 16-bit resolution and 40 kSPS throughput make it an excellent fit for industrial multi-channel data-acquisition (DAQ) boards. Its +/-10V bipolar input range (on a single +5V supply) eliminates the need for level-shifting op-amps in many PLC and process-control front ends. According to the TI datasheet, the 86 dB SINAD plus +/-1.5 LSB INL guarantee delivers the dynamic range required for weigh-scale, strain-gauge, and thermocouple-cold-junction-compensation chains. Place the ADC behind a low-leakage MUX and 1kHz RC anti-alias filter, with 10 uF tantalum + 0.1 uF ceramic at each supply pin to prevent reference-modulation noise from coupling into the conversion. Reduces BOM vs delta-sigma alternatives by removing external reference and clock components.
Recommandé
Precision Weigh-Scale / Load-Cell Digitizer
Low-noise 16-bit conversion with no-missing-codes DNL makes the ADS7807UBE4 ideal for digitizing load-cell outputs in commercial weighing scales. The TI datasheet confirms 16 bits no-missing-codes at 40 kSPS, ensuring monotonic settling for calibration stability. Connect the bridge-excited load cell to the ADC's +/-10V range through a low-offset front-end instrumentation amp; with a 10Hz mechanical filter the ADS7807UBE4 produces stable, repeatable weight readings to <0.01 lb on commercial scales. Operating from +5V, the part draws only 35 mW and can drop to 50 uW between conversions for battery-powered portable scales.
Recommandé
Medical Instrumentation Front End
The ADS7807UBE4 serves medical instrumentation front ends (patient monitors, ECG/BP modules, handheld diagnostics) well thanks to its 86 dB SINAD, low power dissipation (35 mW active / 50 uW shutdown), and +/-10V bipolar-input flexibility. According to the TI ADS7807 datasheet, the part's deterministic SAR latency simplifies pacemaker-style closed-loop control loops. Routinely used in legacy diagnostic ultrasound, infusion-pump, and blood-gas analyzer boards. Designers should pair it with a low-leakage input MUX and an op-amp front end such as TI's OPA1611 to maintain the 16-bit noise floor in the 0.1 Hz - 100 Hz biosignal band.
Recommandé
Pen-Trace Digitizer / Chart-Recorder Replacement
The ADS7807UBE4's 86 dB SINAD and 16-bit resolution make it a natural fit for digitizing legacy chart-recorder analog channels in pen-trace digitizers and strip-chart replacement modules. The TI datasheet specifies +/-1.5 LSB INL max and 16-bit no-missing-codes which preserves the visual fidelity of slow-moving analog traces digitized for archival. Use the parallel interface for fastest sample transfer to a microcontroller or DSP, with the +5V single-supply operation simplifying legacy +5V analog-board retrofits. The wide +/-10V input range accommodates existing +/-10V transducer outputs from strain-gauge or thermocouple conditioning front ends.
Recommandé
Seismic / Vibration Monitoring
The ADS7807UBE4's 86 dB SINAD and anti-alias-friendly SAR architecture enable it to digitize seismic and vibration sensor outputs in structural-health monitoring nodes. With its deterministic 25 us conversion and 40 kSPS ceiling, the device can capture vibration harmonics well above typical seismic-sensor bandwidths. The TI datasheet confirms 16-bit no-missing-codes performance, ensuring the spectral analysis does not lose energy to integral non-linearity errors. Pair it with a 4-pole Butterworth anti-alias filter at 10 kHz and a low-noise MEMS accelerometer to build IP67-rated vibration nodes that run on solar or battery power for years.
Recommandé
Process-Control Loop Input Module
The ADS7807UBE4's 86 dB SINAD, +/-10V input range, and single +5V supply operation suit it to industrial process-control analog-input modules (4-20 mA loop receivers, +/-10V PLC analog cards, RTD front ends). According to the TI datasheet, the part's 86 dB SINAD at 1 kHz input ensures the digitization loop retains enough dynamic range to encode process variables spanning 3-4 decades. Routinely integrated into 8-channel and 16-channel analog-input cards alongside low-leakage CMOS multiplexers; the parallel data bus simplifies hookup to common 16-MCUs and DSPs. Active power of 35 mW and a 50 uW shutdown mode also support distributed I/O nodes where cabinet thermal budget is constrained.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADS7807UBE4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADS7807PBG4 | ADS8507IBDW | ADS8507IDW | ADS7825U/1K | AD976ANZ |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 28-SOIC (DW, 7.50mm) | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC (DW) - same | 28-SOIC - same | 28-SOIC - same |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits | 16 bits |
| Sampling Rate | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | ~25 kSPS (slower, ~38% delta) | 100 kSPS (faster, +150%) |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Input Ranges | +/-10V, 0-5V, 0-4V | +/-10V, 0-5V, 0-4V (identical) | +/-10V, 0-5V (subset) | +/-10V, 0-5V (subset) | 0-5V, 0-10V (unipolar only) | +/-10V |
| Supply Voltage | +5V single | +5V single | +5V single | +5V single | +5V single | +5V single |
| Data Interface | Serial + Parallel | Serial + Parallel | Parallel | Parallel | Serial | Parallel |
Principaux différenciateurs
- Tape-and-Reel factory packaging vs tray (vs ADS7807U / ADS7807PBG4)
- Newer-generation design with similar parametric envelope (vs ADS8507IBDW)
- Pin-compatible cross-brand alternative for non-TI supply chains (vs AD976ANZ)
Notes de conception
Estimated: At active conversion the ADS7807UBE4 draws ~7 mA from +5V (VANA and VAND combined). TI recommends a 10 uF tantalum (or low-ESR ceramic) plus a 0.1 uF ceramic placed within 5 mm of the VANA and VAND pins to keep reference regulator noise off the conversion floor. Sharing the analog and digital +5V at the IC pin without this decoupling can show up as ~2 LSB of periodic noise on the digitized output at low input levels.
Keep the AGND and DGND nets joined at exactly one point - directly under the chip at the exposed paddle / AGND pin (pin 4 of the 28-SOIC), per the TI datasheet layout recommendation. Do not run digital data-bus traces (DB0-DB15) under or near the analog input or VREF traces; a guard trace tied to AGND between AIN and the data bus typically improves SFDR by 4-6 dB.
Driving CS low before R/C falls, or holding R/C low longer than 25 us, causes an extra conversion to be triggered after BUSY falls. The TI datasheet timing diagram shows R/C must transition high before BUSY goes low, or alternatively the part re-enters conversion mode and produces a stale result. Also, when using the BYS pin to bypass the internal 2.5V reference with an external reference, ensure the reference is stable to within 100 us of power-up or the first 1-2 conversions will be erroneous.
Informations de conformité
RoHS and REACH compliance declared by Texas Instruments on the product page. The ADS7807UBE4 is not AEC-Q100 qualified - it is rated for industrial -40C to +85C, not automotive grade. Halogen-free status not explicitly stated in the sourced data.
