Analog Devices Inc. REF192GS

Overview

REF192GS from Analog Devices is a precision micropower low-dropout voltage reference IC delivering 2.50 V output with ±2 mV initial accuracy, 5 ppm/°C max temperature coefficient, and 45 μA max supply current - used as a stable excitation source for high-resolution ADCs and DACs in portable instrumentation.

For engineers reviewing the REF192GS datasheet, REF192GS pinout, REF192GS application, or REF192GS equivalent, key selection criteria include dropout voltage at 10 mA load (1.00 V), sleep-mode current (≤15 μA), and guaranteed performance over −40°C to +85°C industrial temperature range.

Technical Context

The REF192GS employs a patented curvature-corrected band gap core with laser-trimmed thin-film resistors to achieve low drift and high initial accuracy. Its internal sleep control circuit disables output and reduces quiescent current to ≤15 μA when the SLEEP pin is driven low.

It operates with input supply as low as 100 mV above output voltage (e.g., 3.5 V min for 2.5 V output at 10 mA), supports 30 mA output current, and requires a 1 μF output bypass capacitor for stability per datasheet specification.

Key Specifications

Pinout & Package

REF192GS is packaged in an 8-lead SOIC_N (SOIC narrow-body) with exposed pad option not specified; pin compatibility confirmed across REF19x family per Figure 1 of datasheet Rev. L.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with REF192GS, ADR3425ARJZ-R7 offers lower tempco but forfeits sleep control and higher output drive; MAX6126AASA25+ provides better long-term stability yet consumes nearly 3× more supply current - making REF192GS optimal for portable, sleep-aware, and moderate-accuracy applications.

Availability

REF192GS is available at Aetrix Electronics and suitable for portable instrumentation, loop-current-powered transmitters, and solar-powered remote sensors requiring stable component supply with guaranteed long-term availability.

Supply support for REF192GS 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The REF19x series was designed specifically for micropower, low-dropout precision reference needs in battery- and energy-harvesting–constrained systems - emphasizing accuracy, thermal stability, and intelligent power control.

FAQ

What is the minimum supply voltage required for REF192GS to regulate at full 30 mA load?

The REF192GS requires VS ≥ VO + dropout voltage. At 30 mA load, dropout is 1.40 V (per Table 5), so minimum VS = 2.50 V + 1.40 V = 3.90 V. This is validated in the "ELECTRICAL CHARACTERISTICS-REF192 @ TA = 25°C" table where dropout is specified as 1.40 V at VS = 3.9 V and ILOAD = 30 mA. REF192GS remains functional below this, but output regulation degrades beyond spec limits.

Does REF192GS require an output capacitor, and if so, what value and type?

Yes - a 1 μF ceramic capacitor is required between OUTPUT and GND per datasheet Section "Applications Information". This capacitor stabilizes the reference, reduces low-frequency noise (0.1 Hz–10 Hz), and prevents oscillation under varying load conditions. X7R or C0G dielectrics are recommended; tantalum or electrolytic capacitors are not advised due to ESR and aging effects that degrade accuracy and noise performance of REF192GS.

How does the SLEEP pin function on REF192GS, and what logic levels activate it?

The SLEEP pin is an active-low TTL/CMOS-compatible control input. Driving it to ≤0.8 V (logic low) disables the output and reduces supply current to ≤15 μA. Driving it to ≥2.4 V (logic high) enables normal operation with ≤45 μA supply current. Input leakage is ≤−8 μA in both states. This behavior is confirmed in Tables 6 and 7 under "SLEEP PIN" parameters for REF192GS across temperature ranges.

Is REF192GS specified for operation beyond the industrial temperature range?

Yes - REF192GS is fully specified from −40°C to +85°C (industrial), and extended characterization data confirms functional operation up to +125°C. Tables 7 and 15 show electrical characteristics including tempco (2 ppm/°C typ), line regulation (10 ppm/V), and dropout voltage validated at −40°C ≤ TA ≤ +125°C - supporting under-hood automotive and high-ambient industrial deployments where REF192GS maintains 2.50 V output integrity.

Can REF192GS drive a 10 kΩ load directly while maintaining initial accuracy?

Yes - REF192GS guarantees initial accuracy (±2 mV) under IOUT = 0 mA condition, but load regulation is specified at 4 ppm/mA (E grade). A 10 kΩ load draws 0.25 mA at 2.50 V, inducing ≤1 ppm (0.0025 mV) output shift - well within ±2 mV total error budget. This is confirmed in Table 5 (load regulation) and Table 6 (performance over temperature), ensuring REF192GS meets accuracy targets even with light resistive loads.