Low Noise, Micropower

5.0 V Precision Voltage Reference

ADR293

Rev. D

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FEATURES

6.0 V to 15 V supply range

Supply current: 15 μA maximum

Low noise: 15 μV p-p typical (0.1 Hz to 10 Hz)

High output current: 5 mA

Temperature range: −40°C to +125°C

Pin-compatible with the REF02/REF19x

APPLICATIONS

Portable instrumentation

Precision reference for 5 V systems

ADC and DAC reference

Solar-powered applications

Loop-current powered instruments

PIN CONFIGURATIONS

NC

8

NC

7

6

NC

5

NC = NO CONNECT

ADR293

TOP VIEW

(Not to Scale)

Figure 1. 8-Lead Narrow Body SOIC (R-8)

TOP VIEW

(Not to Scale)

1

2

3

4

ADR293

NC

GND

NC

8

7

6

5

NC

NC

NC

NC = NO CONNECT

Figure 2. 8-Lead TSSOP (RU-8)

GENERAL DESCRIPTION

The ADR293 is a low noise, micropower precision voltage

reference that utilizes an XFET® (eXtra implanted junction FET)

reference circuit. The XFET architecture offers significant

performance improvements over traditional band gap and

buried Zener-based references. Improvements include one

quarter the voltage noise output of band gap references

operating at the same current, very low and ultralinear

temperature drift, low thermal hysteresis, and excellent long-

term stability.

The ADR293 is a series voltage reference providing stable and

accurate output voltage from a 6.0 V supply. Quiescent current

is only 15 μA maximum, making this device ideal for battery

powered instrumentation. Three electrical grades are available

offering initial output accuracy of ±3 mV, ±6 mV, and ±10 mV.

Temperature coefficients for the three grades are 8 ppm/°C,

15 ppm/°C, and 25 ppm/°C maximum. Line regulation and load

regulation are typically 30 ppm/V and 30 ppm/mA, respectively,

maintaining the reference’s overall high performance.

The ADR293 is specified over the extended industrial

temperature range of –40°C to +125°C. This device is available

in the 8-lead SOIC and 8-lead TSSOP packages.

Table 1. ADR29x Products

Device

Output

Voltage (V)

Initial

Accuracy (%)

Temperature

Coefficient

(ppm/°C max)

ADR291

2.500

0.08, 0.12, 0.24

8, 15, 25

ADR292

4.096

0.07, 0.10, 0.15

8, 15, 25

ADR293

5.000

0.06, 0.12, 0.20

8, 15, 25