REF196GSZ-REEL7 - 3.3V Precision Voltage Reference | Analog Devices
Référence : REF196GSZ-REEL7 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.97 | $4,97 |
| 10 | $4.47 | $44,70 |
| 100 | $3.98 | $398,00 |
| 500 | $3.58 | $1 790,00 |
| 1 000 | $3.2 | $3 200,00 |
REF196GSZ-REEL7 Présentation
A series voltage reference is a voltage reference IC that sources current to the load from the supply rail and regulates the output against a precision internal bandgap, unlike shunt references which require an external resistor. Voltage references form the foundation of the analog signal chain: an ADC, DAC, or sensor bridge is only as accurate as the reference driving it. The REF196 belongs to the REF19x family of bandgap references, positioning itself at the micropower end of the broader power management IC hierarchy.
Key features include the patented temperature drift curvature correction circuit and laser trimming of highly stable thin-film resistors, which together achieve very low temperature coefficient and high initial accuracy according to the Analog Devices product page. The low dropout characteristic allows the device to maintain regulation with input voltage only marginally above the 3.3V output, making it well suited to battery-powered systems. A SLEEP pin (pin 3) enables micropower shutdown for battery-operated designs, and output current up to 30 mA permits direct powering of low-current analog circuits without an external buffer.
Technically, the bandgap core is laser-trimmed at wafer level, and curvature correction compensates the classic parabolic drift of bandgap references across the industrial temperature range. As a series topology it also provides inherent line and load regulation plus output capacitor stability without a limiting resistor.
Typical applications include 12-bit and 16-bit ADC reference inputs, battery-powered portable instrumentation, industrial 4-20 mA transmitters, and precision sensor excitation, where its micropower supply current and low dropout directly extend battery life.
Design consideration: use a 0.1 uF input capacitor and 10 uF output capacitor per the datasheet typical application, and drive the SLEEP pin low to keep the reference active.
This page synthesizes distributor pricing, drop-in family alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.
Alternatives de remplacement direct pour REF196GSZ-REEL7 — 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 REF196GSZ-REEL7 (même facteur de forme et même empreinte) — différant par Initial Accuracy, Output Current, Output Voltage, Package, Reference Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
REF196GSZ
✅ Remplacement direct✓ En stock
$2.5 / unité
Voir la fiche technique →REF195GSZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
REF192FSZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
REF191ESZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
REF196GSZ-REEL7 Valeurs maximales et caractéristiques électriques
| Reference Type | Series voltage reference |
| Tension de sortie | 3.3 V (fixed) |
| Initial Accuracy | ±0.3% |
| Output Current | 30 mA |
| Topologie | Bandgap with temperature drift curvature correction |
| Shutdown Pin | Yes (SLEEP, pin 3) |
| Boîtier | 8-SOIC (0.154 inch, 3.90 mm width) |
| Type de montage | Surface Mount (SMD/SMT) |
| Packaging | Tape & Reel (REEL7), 8-pin SOIC N T/R |
Configuration des broches de REF196GSZ-REEL7
| Broche 1 | TP — Trim point (per datasheet pin configuration) |
| Broche 2 | VS — Supply voltage input |
| Broche 3 | SLEEP — Shutdown control input (micropower sleep mode) |
| Broche 4 | GND — Ground |
| Broche 5 | NC — Not connected (per datasheet) |
| Broche 6 | NC — Not connected (per datasheet) |
| Broche 7 | OUTPUT — 3.3V precision reference output |
| Broche 8 | TP — Trim point (per datasheet pin configuration) |
Applications typiques
REF196GSZ-REEL7 convient pour 6 applications: Precision ADC Reference Input, Battery-Powered Portable Instrumentation, Industrial 4-20 mA Loop Transmitters, Sensor Bridge Excitation, DAC Output Level Setting, MCU-Based Data Acquisition Systems.
Precision ADC Reference Input
The REF196GSZ-REEL7 is a natural fit for SAR and delta-sigma ADCs requiring a stable 3.3V reference: its ±0.3% initial accuracy bounds full-scale error before calibration, and laser-trimmed thin-film resistors with curvature correction keep drift low across the operating range. Used between the analog supply rail and the ADC VREF pin with 0.1 uF local and 10 uF bulk capacitance, the series topology sources reference current directly without a buffer - up to 30 mA covers most SAR ADC dynamic reference loads. Unlike shunt references, no bias resistor wastes supply current, and line rejection keeps the conversion result immune to rail ripple.
Recommandé
Battery-Powered Portable Instrumentation
Portable instruments benefit directly from the REF196's micropower, low dropout profile: it continues to regulate from a nearly-depleted battery, and the SLEEP pin (pin 3) lets the MCU gate the reference off between measurements. In a duty-cycled data logger sampling every 10 s with a 1 ms active window, estimated average reference current drops by ~99.9% versus always-on operation, extending battery life proportionally. The ±0.3% accuracy suffices for 12-bit systems, and the 8-SOIC footprint keeps board area small. Use a 0.1 uF input cap and 10 uF output cap per the datasheet typical application, and ensure the SLEEP pin is driven to a defined level at all times.
Recommandé
Industrial 4-20 mA Loop Transmitters
Two-wire 4-20 mA transmitters demand a reference that sips power, since the entire transmitter budget is 3.5-4 mA below the 20 mA span - but can also source the reference to DACs and sensor bridges. The REF196GSZ-REEL7's fixed 3.3V ±0.3% output sets the DAC full-scale for loop current programming, while micropower quiescent current preserves loop budget headroom. Its low dropout permits regulation from the loop's minimum compliance voltage. Combine with a precision op-amp and a sense resistor: a 3.3V reference across a 165 ohm resistor yields the 20 mA full-scale span with only reference accuracy limiting loop precision.
Recommandé
Sensor Bridge Excitation
Wheatstone bridge sensors (load cells, RTD and pressure bridges) require ratiometric, stable excitation - exactly the REF196's 30 mA sourcing capability. A 350 ohm load-cell bridge draws about 3.9 mA from a 3.3V excitation (Estimated: I = 3.3 V / (2 x 350 ohm)), well within the 30 mA rating, and the reference's low dropout allows excitation directly from a 3.5-5V rail without a dedicated supply. Because ADC readings are ratiometric to the same reference, reference drift cancels in the measurement ratio, so initial accuracy matters more than absolute tempco - a role the ±0.3% REF196 fills economically in industrial weighing and pressure instrumentation.
Recommandé
DAC Output Level Setting
The REF196GSZ-REEL7 defines full-scale in voltage-output DAC architectures where a fixed 3.3V reference maps code 0xFFFF to 3.3V. The ±0.3% initial accuracy means the full-scale sits within 33 mV of nominal before any gain calibration - adequate for 12-bit accuracy after a one-point calibration. The 30 mA sourcing capability absorbs DAC reference-load transients during code transitions without external buffering, and the low dropout lets the reference share the 3.3V logic rail domain with only modest headroom required. Place 0.1 uF and 10 uF capacitors at the reference output, per the datasheet typical application, to keep reference impedance low during dynamic DAC loading.
Recommandé
MCU-Based Data Acquisition Systems
Microcontroller ADCs with external reference inputs pair naturally with the REF196GSZ-REEL7. The 3.3V output matches the logic-domain full-scale of 3.3V MCUs, simplifying level planning, while the SLEEP pin can be tied to an MCU GPIO so the reference powers down with the MCU in stop mode. Pair with an LDO such as the AP2210K-3.3TR to generate a clean analog rail: the LDO handles the load, the REF196 handles the accuracy. With ±0.3% accuracy, 12-bit sampling retains roughly 2 LSB of reference-related error before calibration, and software gain calibration can reduce residual reference error to well under 1 LSB for most sensor applications.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour REF196GSZ-REEL7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | REF196GSZ | REF195GSZ | REF192FSZ | REF191ESZ |
|---|---|---|---|---|---|
| Package | 8-SOIC (0.154", 3.90mm) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Output Voltage | 3.3 V | 3.3 V | 5.0 V | 2.5 V | 2.048 V |
| Initial Accuracy | ±0.3% | ±0.3% | ±0.3% | ±0.3% | ±0.3% |
| Output Current | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA |
| Shutdown (SLEEP) Pin | Yes | Yes | Yes | Yes | Yes |
| Topology | Series, low dropout | Series, low dropout | Series, low dropout | Series, low dropout | Series, low dropout |
Principaux différenciateurs
- 3.3V fixed output matches logic-domain full-scale (vs REF195GSZ)
- Pin-compatible family covers multiple voltages with one layout (vs REF191ESZ / REF192FSZ)
- Tape & reel delivery for production assembly (vs REF196GSZ)
Notes de conception
Place a 0.1 uF ceramic capacitor at the VS input and a 10 uF capacitor at the OUTPUT pin, both as close to the IC as possible, per the datasheet typical application circuit. The series topology requires the output capacitor for loop stability and load-transient response. Route the reference output as a short, guarded trace to the ADC/DAC VREF pin, and keep high-frequency digital ground returns away from pin 4 (GND) to avoid injecting noise into the reference.
Do not leave the SLEEP pin (pin 3) floating - an undefined level produces unpredictable quiescent current and possibly a non-regulated output during power-up. Drive it from a GPIO with a defined pull, or tie it hard to the inactive level for always-on operation. Also avoid loading the output beyond 30 mA: accuracy is guaranteed only within rated load, and excess current causes voltage droop and potential thermal stress.
Take advantage of the low dropout characteristic: the REF196 regulates with input only slightly above 3.3V, so it can run directly from a single Li-ion cell near depletion or a 3.5-5V rail without a dedicated supply. Estimated headroom check: at VIN = 3.5 V and a 10 mA load, the device dissipates only 2 mV x 10 mA scale power - negligible - so no thermal design is needed at typical loads. Budget for startup time after SLEEP release before sampling begins.
Informations de conformité
RoHS compliance indicated by distributor comparison data (ETEI/Xecor). REACH, lead-free, halogen-free and conflict minerals declarations were not explicitly stated in retrieved data - verify on the official Analog Devices product page.
