The ADR121/ADR125/ADR127 are a family of micropower, high precision, series mode, band gap references with sink and source capability. The parts feature high accuracy and low power consumption in a tiny package. The ADR12x design includes a patented temperature-drift curvature correction technique that minimizes the nonlinearities in the output voltage vs. temperature characteristics.

The ADR12x is a low dropout voltage reference, requiring only 300 mV for ADR121/ADR125 and 1.45 V for ADR127 above the nominal output voltage on the input to provide a stable output voltage. This low dropout performance, coupled with the low 85 μA operating current, makes the ADR12x ideal for battery-powered applications.

Available in an extended industrial temperature range of −40°C to +125°C, the ADR121/ADR125/ADR127 are housed in the tiny TSOT (UJ-6) package.

Applications

Battery-powered instrumentation

Portable medical equipment

Data acquisition systems

Automotive

Data Sheet, Rev. B, 1/08

Part#	Vout	Initial Accuracy (%)	Ref Out TC (ppm/C)	0.1-10 Hz Noise (µV p-p)	Ref Output Current (mA)	Supply Voltage Range (V)	Temp Range(s)	Supply Current (max)	Reference Type	Package	Price* (1000-4999)	Product Description
ADR130	+0.5/+1 Pin Programmable	0.35	5	3	4	2V to 18V	-40 to +125	150µA	Series	TSOT	$0.92	Precision, Sub-Band Gap, Series Voltage Reference
AD584	+2.5/+5/+7.5/+10 Prog	0.05	5	50	10	+4.5 to +30	-55 to +125, 0 to +70	1mA	Series-Multi/Select Out	DIP, TO-92	$3.05	10.000 V, 7.500 V, 5.000 V and 2.500 V, Pin Programmable Precision Voltage Reference
ADR510	1.0	0.35	70	4	n/a	n/a, shunt ref	-40 to +85	n/a	Shunt	SOT23	$0.60	1.0 V Precision, Low Noise, Shunt Voltage Reference
AD1580	1.2	0.08	50	5	n/a	n/a, shunt ref	-40 to +85	n/a	Shunt	SC70, SOT23	$0.61	1.2 V Micropower, Precision Shunt Voltage Reference
ADR512	1.2	0.3	60	4	n/a	n/a shunt ref	-40 to +85	n/a	Shunt	SOT23	$0.60	1.2 V Precision, Low Noise Shunt Voltage Reference
ADR280	1.2	0.4	5	2.2	100	+2.4 to +5.5	-40 to +85	16µA	Series	SC70, SOT23	$0.76	1.20 V, Low Noise, Low Power, High PSRR, Precision Voltage Reference
AD589	1.2	1.2	10	5	n/a	n/a, Shunt Type Reference	-55 to +125, 0 to +70	50µA	Shunt	Metal Can, SOIC	$1.33	Two-Terminal IC 1.2 V Shunt Reference
ADR1581	1.25	0.12	50	4.5	n/a	n/a, shunt ref	-40 to +85	n/a	Shunt	SOT23	$0.61	1.25 V Micropower, Precision Shunt Voltage Reference
ADR127	1.25	0.12	3	5	5	+2.7 to +18	-40 to +125	125µA	Series	TSOT	$0.92	1.25V, Precision Micropower LDO Voltage Reference
ADR827	1.25	0.4	15	8	5	+2.7V to +15V	-40 to +125	400µA	Series	MSOP	$1.11	Low Power, Precision Reference and Op Amp
ADR1500	1.2875	0.2	170	5	n/a	n/a, shunt reference	-40 to +85	n/a	Shunt	SC70	$1.03	1.2875 V Micropower, Shunt Voltage Reference
ADR318	1.8	0.27	5	5	5	+2.4 to +15	0 to +70	120µA	Series-Low Dropout	SOT23	$0.82	1.8 V Precision Voltage Reference
AD588	10	0.01	1.5	6	10	Vdd-Vss = (Vout+2) to +36	-25 to +85, 0 to +70	10mA	Series-Multi/Select Out	DIP	$15.21	+10 V, +5 V, ±5 V tracking, −5 V, −10 V, High Precision Voltage Reference
AD688	10	0.02	1.5	6	10	Vdd-Vss = (Vout+2) to 36	-40 to +85, -55 to +125	12mA	Series-Multi/Select Out	DIP, SOIC	$9.19	High Precision ±10 V Reference
AD581	10	0.05	5	40	10	+12 to +30	-55 to +125, 0 to +70	1mA	Series	TO-52	$4.14	High Precision 10 V IC Reference
AD587	10	0.05	5	4	10	+13.5 to +36	-55 to +125, 0 to +70	4mA	Series	DIP, SOIC	$2.55	High Precision 10 V Reference
ADR01	10	0.05	3	20	10	+12 to +40	-40 to +125, 0 to +70	1mA	Series	SC70, SOIC, TSOT	$1.00	Ultra-Compact, Precision 10V Voltage Reference
REF01	10	0.3	3	30	10	+12 to +40	-40 to +85, -55 to +125	1.4mA	Series	DIP, SOIC, TO-99	$1.21	+10V Precision Voltage Reference
ADR440	2.048	0.05	1	1	10	+3 to +18	-40 to +125	3.75mA	Series-Low Dropout	DIP, MSOP, SOIC	$2.53	2.048 V, Ultralow Noise, LDO XFET® Voltage Reference with +10/-5 mA Output Current Capability
ADR420	2.048	0.05	1	1.75	10	+4.0 to +18	-40 to +125	500µA	Series	MSOP, SOIC	$2.82	2.048 V XFET® Voltage Reference
ADR430	2.048	0.05	1	3.5	30	+4.1 to +18	-40 to +125	800µA	Series	MSOP, SOIC	$2.96	2.048 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR5040	2.048	0.1	10	-	n/a	n/a, is shunt ref	-40 to +125	n/a	Shunt	SC70, SOT23	$0.30	Precision Micropower Shunt Mode Voltage Reference, 2.048 V Output
REF191	2.048	0.1	2	20	30	+2.3 to +15	-40 to +85	45µA	Series-Low Dropout	DIP, SOIC	$1.38	2.048, Precision Micropower, Low Dropout, Low Voltage Reference
ADR360	2.048	0.15	9	6.8	5	+2.35 to +15	-40 to +125	190µA	Series-Low Dropout	TSOT	$0.78	Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 2.048 VOUT
ADR390	2.048	0.19	9	5	5	+2.5 to +15	-40 to +125	120µA	Series-Low Dropout	TSOT	$0.78	2.048 V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR370	2.048	0.2	30	70	5	+2.3 to +15	-40 to +125	72µA	Series-Low Dropout	SOT23	$0.75	2.048 V Tiny Package Precision Reference
ADR520	2.048	0.2	40	14	n/a	n/a, shunt reference	-40 to +85	50µA	Shunt	SC70, SOT23	$0.48	2.048 V High Performance, Low Noise Shunt Reference
ADR380	2.048	0.24	5	5	5	+2.4 to +18	-40 to +85	120µA	Series-Low Dropout	SOT23	$0.76	2.048 V Bandgap Voltage Reference
REF43	2.5	0.02	25	4	20	+4.5 to +40	-40 to +85	450µA	Series	DIP, SOIC	$3.69	+2.5V Low Power Precision Voltage Reference
AD780	2.5	0.04	3	4	10	+4 to +36	-40 to +85	1mA	Series-Multi/Select Out	DIP, SOIC	$3.65	2.5 V/3.0 V Ultrahigh Precision Bandgap Voltage Reference
ADR441	2.5	0.04	1	1.2	10	+3 to +18	-40 to +125	3.75mA	Series-Low Dropout	DIP, MSOP, SOIC	$2.53	2.5 V, Ultralow Noise, LDO XFET® Voltage Reference with +10/-5 mA Output Current Capability
ADR431	2.5	0.04	1	3.5	30	+4.5 to +18	-40 to +125	800µA	Series	MSOP, SOIC	$2.96	2.5 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR421	2.5	0.04	1	1.75	10	+4.5 to +18	-40 to +125	500µA	Series	MSOP, SOIC	$2.82	2.5 V XFET® Voltage Reference
AD1582	2.5	0.08	50	70	5	+2.7 to +12	-40 to +125	70µA	Series-Low Dropout	SOT23	$0.61	2.5V Micropower, Precision Series Mode Voltage Reference
ADR291	2.5	0.08	3	8	5	+3 to +15	-40 to +125	12µA	Series-Low Dropout	SOIC, TSSOP	$1.78	Precision, Micropower 2.5 V XFET™ Reference
REF192	2.5	0.08	2	25	30	+2.6 to +15	-40 to +85	45µA	Series-Low Dropout	DIP, SOIC, TSSOP	$1.38	Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo=2.50 V
ADR5041	2.5	0.1	10	-	n/a	n/a, shunt ref	-40 to +125	n/a	Shunt	SC70, SOT23	$0.30	Precision, Micropower, Shunt Mode Voltage Reference, Vout = 2.5V
ADR03	2.5	0.1	3	10	10	+4.5 to +40	-40 to +125	1mA	Series	SC70, SOIC, TSOT	$1.03	Ultra-Compact, Precision 2.5 V Voltage Reference
ADR121	2.5	0.12	3	10	5	+2.8 to +18	-40 to +125	125µA	Series-Low Dropout	TSOT	$0.92	2.5V, Precision Micropower LDO Voltage Reference
ADR361	2.5	0.12	9	8.25	5	+2.8 to +15	-40 to +125	190µA	Series-Low Dropout	TSOT	$0.78	Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 2.5 Vout
ADR391	2.5	0.16	9	5	5	+2.8 to +18	-40 to +125	120µA	Series-Low Dropout	TSOT	$0.78	2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR821	2.5	0.2	15	16	5	+2.8V to +15V	-40 to +125	400µA	Series	MSOP	$1.11	Low Power, Precision Reference and Op Amp
AD680	2.5	0.2	20	8	10	+4.5 to +36	-40 to +85, 0 to +70	250µA	Series	DIP, SOIC, TO-92	$1.76	2.5V, Low Power Bandgap Reference
ADR525	2.5	0.2	40	18	n/a	n/a, shunt reference	-40 to +85	50µA	Shunt	SC70, SOT23	$0.48	2.5 V High Performance, Low Noise Shunt Reference
REF03	2.5	0.2	10	6	20	+4.5 to +33	-40 to +85	1.4mA	Series	DIP, SOIC	$1.21	Precision Voltage Reference Providing Stable +2.5 V Output
ADR381	2.5	0.24	3	5	5	+2.8 to +18	-40 to +85	120µA	Series-Low Dropout	SOT23	$0.76	2.5 V Bandgap Voltage Reference
AD580	2.5	0.4	10	8	10	+4.5 to +30	-55 to +125, 0 to +70	1.5mA	Series	TO-52	$2.67	High Precision 2.5 V IC Reference
ADR443	3	0.04	1	1.4	10	+3.5 to +18	-40 to +125	3.75mA	Series-Low Dropout	MSOP, SOIC	$2.53	3.0 V High Precision, LDO XFET® Reference for High Performance Sigma-Delta Converters
ADR423	3	0.04	1	1	10	+5.0 to +18	-40 to +125	500µA	Series	MSOP, SOIC	$2.82	3.0V XFET® Voltage Reference
ADR433	3	0.05	1	3.75	30	+5.0 to +18	-40 to +125	800µA	Series	MSOP, SOIC	$2.96	3.0 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR5043	3	0.1	10	-	n/a	n/a, shunt REF	-40 to +125	n/a	Shunt	SC70, SOT23	$0.30	Precision, Micropower, Shunt Mode Voltage Reference (3.0 Vout)
ADR363	3	0.1	9	8.7	5	+3.3 to +15	-40 to +125	190µA	Series-Low Dropout	TSOT	$0.78	Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 3.0 Vout
ADR06	3	0.1	3	10	10	+5 to +40	-40 to +125	0.65mA	Series	SC70, SOIC, TSOT	$1.03	Ultracompact, Precision 3 V Voltage Reference
AD1583	3	0.1	50	85	5	+3.2 to +12	-40 to +125	70µA	Series-Low Dropout	SOT23	$0.61	3.0V Micropower, Precision Series Mode Voltage Reference
ADR530	3	0.2	40	22	n/a	n/a, shunt ref	-40 to +85	50µA	Shunt	SC70, SOT23	$0.48	3.0 V High Performance, Low Noise Shunt Reference
REF193	3	0.33	10	30	30	+3.2 to +15	-40 to +85	45µA	Series-Low Dropout	SOIC	$1.38	Precision Micropower, Low Dropout, Low Voltage Reference, Nom. Vo=3.0 V
ADR366	3.3	0.125	9	9.3	5	+3.6 to +15	-40 to +125	190µA	Series-Low Dropout	TSOT	$0.78	Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 3.3 Vout
REF196	3.3	0.3	10	33	30	+3.4 to +15	-40 to +85	45µA	Series-Low Dropout	SOIC, TSSOP	$1.38	Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 3.3 V
ADR444	4.096	0.04	1	1.8	10	+4.6 to +18	-40 to +125	3.75mA	Series-Low Dropout	MSOP, SOIC	$2.53	4.096 V High Precision, LDO XFET® Reference for use with High Performance Sigma-Delta Converters
ADR434	4.096	0.04	1	6.25	30	+6.1 to +18	-40 to +125	800µA	Series	MSOP, SOIC	$2.96	4.096 V, High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
REF198	4.096	0.05	2	40	30	+3.4 to +15	-40 to +85	45µA	Series-Low Dropout	DIP, SOIC, TSSOP	$1.38	Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 4.096 V
ADR292	4.096	0.07	3	12	5	+4.5 to +18	-40 to +125	12µA	Series	SOIC, TSSOP	$1.78	Precision, Micropower 4.096 V XFET™ Reference
ADR5044	4.096	0.1	10	-	n/a	n/a, shunt REF	-40 to +125	n/a	Shunt	SC70, SOT23	$0.30	Precision, Micropower ,Shunt Mode Voltage Reference (4.096 Vout)
ADR364	4.096	0.1	9	11	5	+4.4 to +15	-40 to +125	190µA	Series-Low Dropout	TSOT	$0.78	Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 4.096 VOUT
AD1584	4.096	0.1	50	110	5	+4.3 to +12	-40 to +125	70µA	Series-Low Dropout	SOT23	$0.61	4.096V, Micropower, Precision Series Mode Voltage Reference
ADR392	4.096	0.12	9	7	5	+4.3 to +15	-40 to +125	120µA	Series-Low Dropout	TSOT	$0.78	4.096 V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR540	4.096	0.2	40	30	n/a	n/a, shunt ref	-40 to +85	50µA	Shunt	SC70, SOT23	$0.48	4.096 V High Performance, Low Noise Shunt Reference
ADR439	4.5	0.04	1	7.5	30	+6.5 to +18	-40 to +125	800µA	Series	MSOP, SOIC	$2.96	4.5 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
REF194	4.5	0.044	2	45	30	+4.6 to +15	-40 to +85	45µA	Series-Low Dropout	DIP, SOIC	$1.38	Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 4.5 V
ADR445	5	0.04	1	2.25	10	+5.5 to +18	-40 to +125	3.75mA	Series-Low Dropout	MSOP, SOIC	$2.53	5.0 V High Precision, LDO XFET® Reference for use with High Performance Sigma-Delta Converters
ADR435	5	0.04	1	8	30	+7.0 to +18	-40 to +125	800µA	Series	MSOP, SOIC	$2.96	5.0 V High Precision, Low Noise XFET® Reference with Output Sink and Source Capability
ADR425	5	0.04	1	3.4	10	+7.0 to +18	-40 to +125	500µA	Series	MSOP, SOIC	$2.82	5.0V XFET® Voltage Reference
AD586	5	0.04	2	4	10	+10.8 to +36	-55 to +125, 0 to +70	3mA	Series	DIP, SOIC	$2.78	High Precision 5 V Reference
ADR02	5	0.06	3	10	10	+7.0 to +40	-40 to +125, 0 to +70	1mA	Series	SC70, SOIC, SOT23, TSOT	$1.03	Ultra-Compact, Precision +5.0 V Reference
ADR293	5	0.06	3	15	5	+6.0 to +15	-40 to +125	15µA	Series	SOIC, TSSOP	$1.78	Low Noise Micropower Precision Voltage 5.0 V Reference
ADR365	5	0.08	9	12.8	5	+5.3 to +15	-40 to +125	190µA	Series-Low Dropout	TSOT	$0.78	Low Power, Low Noise Voltage Reference w/ Sink/Source Capability, 5.0 VOUT
ADR5045	5	0.1	n/a	-	n/a	n/a, Shunt REF	-40 to +125	n/a	Shunt	SC70, SOT23	$0.30	Precision, Micropower, Shunt Mode Voltage Reference (5.0 Vout)
AD1585	5	0.1	50	140	5	+5.2 to +12	-40 to +125	70µA	Series-Low Dropout	SOT23	$0.61	5V, Micropower, Precision, Series-Mode, Low Dropout Voltage Reference
ADR395	5	0.1	9	8	5	+5.3 to +15	-40 to +125	120µA	Series-Low Dropout	TSOT	$0.78	5.0 V Micropower, Low Noise Precision Voltage Reference with Shutdown
ADR125	5	0.12	3	20	5	+5.3 to +18	-40 to +125	125µA	Series-Low Dropout	TSOT	$0.92	5V, Precision Micropower LDO Voltage Reference
REF02	5	0.15	3	10	10	+7.0 to +40	-40 to +85, -55 to +125, 0 to +70	1.4mA	Series	DIP, SOIC, TO-99	$1.21	+5V Precision Voltage Reference/Temperature Transducer
REF195	5	0.2	2	50	30	+5.1 to +15	-40 to +85	45µA	Series-Low Dropout	DIP, SOIC, TSSOP	$1.25	Precision Micropower, Low Dropout, Low Voltage References, Nom. Vo = 5 V
ADR550	5	0.2	40	38	n/a	n/a, shunt reference	-40 to +85	50µA	Shunt	SC70, SOT23	$0.48	5.0 V High Performance, Low Noise Shunt Reference

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

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