ADR3430

Micropower, High Accuracy Voltage References ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 FEATURES Initial accuracy: ±0.1% (maximum) Maximum temperature coefficient: 8 ppm/°C Operating temperature range: −40°C to +125°C Output current: +10 mA source/−3 mA sink Low quiescent current: 100 μA (maximum) Low dropout voltage: 250 mV at 2 mA Output noise (0.1 Hz to 10 Hz): VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE < 0.7 V IL = 0 mA, −40°C ≤ TA ≤ +125°C IL = 2 mA, −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 0.85 8 28 0.6 70 −60 30 100 85 100 5 1.1 1.15 0.7 VIN 3 μA μA μA V V V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 1 1 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 3 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ADR3420 ELECTRICAL CHARACTERISTICS VIN = 2.3 V to 5.5 V, TA = 25°C, ILOAD = 0 mA, unless otherwise noted. Table 4. Parameter OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT LINE REGULATION LOAD REGULATION Sourcing Sinking OUTPUT CURRENT CAPACITY Sourcing Sinking QUIESCENT CURRENT Normal Operation Shutdown DROPOUT VOLTAGE 1 ENABLE PIN Shutdown Voltage ENABLE Voltage ENABLE Pin Leakage Current OUTPUT VOLTAGE NOISE OUTPUT VOLTAGE NOISE DENSITY OUTPUT VOLTAGE HYSTERESIS 2 RIPPLE REJECTION RATIO LONG-TERM STABILITY TURN-ON SETTLING TIME 1 2 Symbol VOUT VOERR TCVOUT ΔVO/ΔVIN ΔVO/ΔIL Conditions Min 2.0459 Typ 2.0480 −40°C ≤ TA ≤ +125°C VIN = 2.3 V to 5.5 V VIN = 2.3 V to 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to 10 mA, VIN = 2.8 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 2.8 V, −40°C ≤ TA ≤ +125°C 7 Max 2.0500 ±0.1 ±2.048 8 50 160 30 50 Unit V % mV ppm/°C ppm/V ppm/V ppm/mA ppm/mA 12 7 IL VIN = 2.8 V to 5.5 V VIN = 2.8 V to 5.5 V IQ ENABLE > VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE < 0.7 V IL = 0 mA, −40°C ≤ TA ≤ +125°C IL = 2 mA, −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 0.85 15 38 0.9 70 −60 30 400 85 100 5 250 300 0.7 VIN 3 μA μA μA mV mV V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 100 150 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 4 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ADR3425 ELECTRICAL CHARACTERISTICS VIN = 2.7 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 5. Parameter OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT LINE REGULATION LOAD REGULATION Sourcing Sinking OUTPUT CURRENT CAPACITY Sourcing Sinking QUIESCENT CURRENT Normal Operation Shutdown DROPOUT VOLTAGE 1 ENABLE PIN Shutdown Voltage ENABLE Voltage ENABLE Pin Leakage Current OUTPUT VOLTAGE NOISE OUTPUT VOLTAGE NOISE DENSITY OUTPUT VOLTAGE HYSTERESIS 2 RIPPLE REJECTION RATIO LONG-TERM STABILITY TURN-ON SETTLING TIME 1 2 Symbol VOUT VOERR TCVOUT ΔVO/ΔVIN ΔVO/ΔIL Conditions Min 2.4975 Typ 2.500 −40°C ≤ TA ≤ +125°C VIN = 2.7 V to 5.5 V VIN = 2.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to 10 mA, VIN = 3.0 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 3.0 V, −40°C ≤ TA ≤ +125°C 2.5 5 Max 2.5025 ±0.1 ±2.5 8 50 120 30 50 Unit V % mV ppm/°C ppm/V ppm/V ppm/mA ppm/mA 10 10 IL VIN = 3.0 V to 5.5 V VIN = 3.0 V to 5.5 V IQ ENABLE ≥ VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE ≤ 0.7 V IL = 0 mA, TA = −40°C ≤ TA ≤ +125°C IL = 2 mA, TA = −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, TA = −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 1 18 42 1 70 −60 30 600 85 100 5 200 250 0.7 VIN 3 μA μA μA mV mV V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 50 75 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 5 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ADR3430 ELECTRICAL CHARACTERISTICS VIN = 3.2 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 6. Parameter OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT LINE REGULATION LOAD REGULATION Sourcing Sinking OUTPUT CURRENT CAPACITY Sourcing Sinking QUIESCENT CURRENT Normal Operation Shutdown DROPOUT VOLTAGE 1 ENABLE PIN Shutdown Voltage ENABLE Voltage ENABLE Pin Leakage Current OUTPUT VOLTAGE NOISE OUTPUT VOLTAGE NOISE DENSITY OUTPUT VOLTAGE HYSTERESIS 2 RIPPLE REJECTION RATIO LONG-TERM STABILITY TURN-ON SETTLING TIME 1 2 Symbol VOUT VOERR TCVOUT ΔVO/ΔVIN ΔVO/ΔIL Conditions Min 2.9970 Typ 3.0000 −40°C ≤ TA ≤ +125°C VIN = 3.2 V to 5.5 V VIN = 3.2 V to 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to 10 mA, VIN = 3.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 3.5 V, −40°C ≤ TA ≤ +125°C 2.5 5 Max 3.0030 ±0.1 ±3.0 8 50 120 30 50 Unit V % mV ppm/°C ppm/V ppm/V ppm/mA ppm/mA 9 10 IL VIN = 3.5 V to 5.5 V VIN = 3.5 V to 5.5 V IQ ENABLE ≥ VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE ≤ 0.7 V IL = 0 mA, TA = −40°C ≤ TA ≤ +125°C IL = 2 mA, TA = −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, TA = −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 0.85 22 45 1.1 70 −60 30 700 85 100 5 200 250 0.7 VIN 3 μA μA μA mV mV V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 50 75 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 6 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ADR3433 ELECTRICAL CHARACTERISTICS VIN = 3.5 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 7. Parameter OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT LINE REGULATION LOAD REGULATION Sourcing Sinking OUTPUT CURRENT CAPACITY Sourcing Sinking QUIESCENT CURRENT Normal Operation Shutdown DROPOUT VOLTAGE 1 ENABLE PIN Shutdown Voltage ENABLE Voltage ENABLE Pin Leakage Current OUTPUT VOLTAGE NOISE OUTPUT VOLTAGE NOISE DENSITY OUTPUT VOLTAGE HYSTERESIS 2 RIPPLE REJECTION RATIO LONG-TERM STABILITY TURN-ON SETTLING TIME 1 2 Symbol VOUT VOERR TCVOUT ΔVO/ΔVIN ΔVO/ΔIL Conditions Min 3.2967 Typ 3.30 −40°C ≤ TA ≤ +125°C VIN = 3.5 V to 5.5 V VIN = 3.5 V to 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to 10 mA, VIN = 3.8 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 3.8 V, −40°C ≤ TA ≤ +125°C 5 Max 3.3033 ±0.1 ±3.3 8 50 120 30 50 Unit V % mV ppm/°C ppm/V ppm/V ppm/mA ppm/mA 9 10 IL VIN = 3.8 V to 5.5 V VIN = 3.8 V to 5.5 V IQ ENABLE > VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE < 0.7 V IL = 0 mA, −40°C ≤ TA ≤ +125°C IL = 2 mA, −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 0.85 25 46 1.2 70 -60 30 750 85 100 5 200 250 0.7 VIN 3 μA μA μA mV mV V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 50 75 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 7 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ADR3440 ELECTRICAL CHARACTERISTICS VIN = 4.3 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 8. Parameter OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT LINE REGULATION LOAD REGULATION Sourcing Sinking OUTPUT CURRENT CAPACITY Sourcing Sinking QUIESCENT CURRENT Normal Operation Shutdown DROPOUT VOLTAGE 1 ENABLE PIN Shutdown Voltage ENABLE Voltage ENABLE Pin Leakage Current OUTPUT VOLTAGE NOISE OUTPUT VOLTAGE NOISE DENSITY OUTPUT VOLTAGE HYSTERESIS 2 RIPPLE REJECTION RATIO LONG-TERM STABILITY TURN-ON SETTLING TIME 1 2 Symbol VOUT VOERR TCVOUT ΔVO/ΔVIN ΔVO/ΔIL Conditions Min 4.0919 Typ 4.0960 −40°C ≤ TA ≤ +125°C VIN = 4.3 V to 5.5 V VIN = 4.3 V to 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to 10 mA, VIN = 4.6 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 4.6 V, −40°C ≤ TA ≤ +125°C 2.5 3 Max 4.1000 ±0.1 ±4.096 8 50 120 30 50 Unit V % mV ppm/°C ppm/V ppm/V ppm/mA ppm/mA 6 15 IL VIN = 4.6 V to 5.5 V VIN = 4.6 V to 5.5 V IQ ENABLE ≥ VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE ≤ 0.7 V IL = 0 mA, TA = −40°C ≤ TA ≤ +125°C IL = 2 mA, TA = −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, TA = −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 29 53 1.4 70 −60 30 800 85 100 5 200 250 0.7 VIN 3 μA μA μA mV mV V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 50 75 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 8 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ADR3450 ELECTRICAL CHARACTERISTICS VIN = 5.2 V to 5.5 V, IL = 0 mA, TA = 25°C, unless otherwise noted. Table 9. Parameter OUTPUT VOLTAGE INITIAL ACCURACY TEMPERATURE COEFFICIENT LINE REGULATION LOAD REGULATION Sourcing Sinking OUTPUT CURRENT CAPACITY Sourcing Sinking QUIESCENT CURRENT Normal Operation Shutdown DROPOUT VOLTAGE 1 ENABLE PIN Shutdown Voltage ENABLE Voltage ENABLE Pin Leakage Current OUTPUT VOLTAGE NOISE OUTPUT VOLTAGE NOISE DENSITY OUTPUT VOLTAGE HYSTERESIS 2 RIPPLE REJECTION RATIO LONG-TERM STABILITY TURN-ON SETTLING TIME 1 2 Symbol VOUT VOERR TCVOUT ΔVO/ΔVIN ΔVO/ΔIL Conditions Min 4.9950 Typ 5.0000 −40°C ≤ TA ≤ +125°C VIN = 5.2 V to 5.5 V VIN = 5.2 V to 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to 10 mA, VIN = 5.5 V, −40°C ≤ TA ≤ +125°C IL = 0 mA to −3 mA, VIN = 5.5 V, −40°C ≤ TA ≤ +125°C 2.5 3 Max 5.0050 ±0.1 ±5.0 8 50 120 30 50 Unit V % mV ppm/°C ppm/V ppm/V ppm/mA ppm/mA 3 19 IL VIN = 5.5 V VIN = 5.5 V IQ ENABLE ≥ VIN × 0.85 ENABLE = VIN, −40°C ≤ TA ≤ +125°C ENABLE ≤ 0.7 V IL = 0 mA, TA = −40°C ≤ TA ≤ +125°C IL = 2 mA, TA = −40°C ≤ TA ≤ +125°C 0 VIN × 0.85 ENABLE = VIN, TA = −40°C ≤ TA ≤ +125°C f = 0.1 Hz to 10 Hz f = 10 Hz to 10 kHz f = 1 kHz TA = +25°C to −40°C to +125°C to +25°C fIN = 60 Hz 1000 hours at 50°C CIN = 0.1 μF, CL = 0.1 μF, RLoad = 1 kΩ 1 35 60 1.5 70 −58 30 900 85 100 5 200 250 0.7 VIN 3 μA μA μA mV mV V V μA μV p-p μV rms μV/√Hz ppm dB ppm μs 10 −3 mA mA VDO 50 75 VL VH IEN en p-p en ΔVOUT_HYS RRR ΔVOUT_LTD tR Refers to the minimum difference between VIN and VOUT such that VOUT maintains a minimum accuracy of 0.1%. See the Terminology section. See the Terminology section. The part is placed through the temperature cycle in the order of temperatures shown. Rev. B | Page 9 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ABSOLUTE MAXIMUM RATINGS AND MINIMUM OPERATING CONDITION TA = 25°C, unless otherwise noted. Table 10. Parameter Supply Voltage ENABLE to GND SENSE Voltage VIN Minimum Slew Rate Operating Temperature Range Storage Temperature Range Junction Temperature Range Rating 6V VIN 0.1 V/ms −40°C to +125°C −65°C to +125°C −65°C to +150°C THERMAL RESISTANCE θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 11. Thermal Resistance Package Type 6-Lead SOT-23 (RJ-6) θJA 230 θJC 92 Unit °C/W ESD CAUTION Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Rev. B | Page 10 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS GND FORCE 1 6 ADR34xx GND SENSE 2 5 VOUT FORCE VOUT SENSE 08440-002 TOP VIEW ENABLE 3 (Not to Scale) 4 VIN Figure 2. Pin Configuration Table 12. Pin Function Descriptions Pin No. 1 2 3 4 5 6 1 Mnemonic GND FORCE GND SENSE ENABLE VIN VOUT SENSE VOUT FORCE Description Ground Force Connection. 1 Ground Voltage Sense Connection. Connect directly to the point of lowest potential in the application.1 Enable Connection. Enables or disables the device. Input Voltage Connection. Reference Voltage Output Sensing Connection. Connect directly to the voltage input of the load devices.1 Reference Voltage Output.1 See the Applications Information section for more information on force/sense connections. Rev. B | Page 11 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 2.5010 2.5008 2.5006 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 5.0025 VIN = 5.5V 5.0020 5.0015 5.0010 5.0005 5.0000 4.9995 4.9990 4.9985 4.9980 VIN = 5.5V 2.5004 2.5002 2.5000 2.4998 2.4996 2.4994 2.4992 –25 –10 5 20 35 50 65 80 95 110 125 08440-003 –25 –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) TEMPERATURE (ºC) Figure 3. ADR3425 Output Voltage vs. Temperature 40 35 30 NUMBER OF DEVICES NUMBER OF DEVICES 25 20 15 10 5 08440-005 Figure 6. ADR3450 Output Voltage vs. Temperature 45 40 35 30 25 20 15 10 5 0 0 0 1 2 3 4 5 6 7 8 9 10 MORE TEMPERATURE COEFFICIENT (ppm/°C) Figure 4. ADR3425 Temperature Coefficient Distribution 24 22 20 LOAD REGULATION (ppm/mA) Figure 7. ADR3450 Temperature Coefficient Distribution 35 18 16 14 12 10 8 6 4 LOAD REGULATION (ppm/mA) ADR3412 ADR3420 ADR3425 ADR3430 ADR3433 ADR3440 ADR3450 IL = 0mA TO +10mA SOURCING 30 25 ADR3412 ADR3420 ADR3425 ADR3430 ADR3433 ADR3440 ADR3450 IL = 0mA TO –3mA SINKING 20 15 10 08440-054 2 0 –40 –25 –10 5 20 50 65 35 TEMPERATURE (°C) 80 95 110 08440-053 125 5 –40 –25 –10 5 20 35 50 65 TEMPERATURE (°C) 80 95 110 125 Figure 5. Load Regulation vs. Temperature (Sourcing) Figure 8. Load Regulation vs. Temperature (Sinking) Rev. B | Page 12 of 24 08440-006 0 1 2 3 4 5 6 7 8 9 TEMPERATURE COEFFICIENT (ppm/°C) 10 11 08440-004 2.4990 –40 4.9975 –40 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 1.20 1.15 1.10 1.05 1.00 0.95 0.90 08440-056 400 350 –40°C +25°C +125°C DIFFERENTIAL VOLTAGE (mV) 2 3 4 5 6 7 8 9 10 DIFFERENTIAL VOLTAGE (V) 300 250 200 150 100 50 0 –3 TA = –40°C TA = +25°C TA = +125°C 0.85 0.80 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 LOAD CURRENT (mA) LOAD CURRENT (mA) Figure 9. ADR3412 Dropout Voltage vs. Load Current 450 400 Figure 12. ADR3425 Dropout Voltage vs. Load Current 350 300 –40°C +25°C +125°C DIFFERENTIAL VOLTAGE (mV) DIFFERENTIAL VOLTAGE (mV) 350 300 250 200 150 100 50 0 –50 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 08440-057 TA = –40°C TA = +25°C TA = +125°C 250 200 150 100 50 0 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10 LOAD CURRENT (mA) LOAD CURRENT (mA) Figure 10. ADR3420 Dropout Voltage vs. Load Current 140 FREQUENCY GEN = 1Hz LINE REGULATION (ppm/V) Figure 13. ADR3450 Dropout Voltage vs. Load Current ADR3412 ADR3420 ADR3425 ADR3430 ADR3433 ADR3440 ADR3450 120 100 80 60 40 20 VIN = 2V/DIV CIN = COUT = 0.1µF RL = 1kΩ 2 VOUT = 500mV/DIV 08440-055 1 CH1 500mV CH2 2.00V M100µs A CH2 2.36V –10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) Figure 11. ADR3412 Start-Up (Turn-On Settle) Time Figure 14. Line Regulation vs. Temperature Rev. B | Page 13 of 24 08440-052 0 –40 –25 08440-016 10 08440-015 –2 –1 0 1 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 0 RIPPLE REJECTION RATIO (dB VOUT/VIN) –10 –20 –30 –40 –50 –60 –70 –80 –90 10 CL = 1.1µF CIN = 0.1µF 1 10µV/DIV TIME = 1s/DIV CH1 pk-pk = 18µV CH1 RMS = 3.14µV 08440-028 100 1k FREQUENCY (Hz) 10k 100k Figure 15. ADR3425 Output Voltage Noise (0.1 Hz to 10 Hz) Figure 18. ADR3425 Ripple Rejection Ratio vs. Frequency CIN = CL = 0.1µF RL = ∞ 1 VIN = 2V/DIV 1 100µV/DIV TIME = 200µs/DIV 08440-029 TIME = 1s/DIV CH1 pk-pk = 300µV CH1 RMS = 42.0µV VOUT = 1V/DIV Figure 16. ADR3425 Output Voltage Noise (10 Hz to 10 kHz) 12 Figure 19. ADR3425 Start-Up Response 10 NOISE DENSITY (µVp-p /√Hz) ENABLE 8 VENABLE = 1V/DIV VIN = 3.0v CIN = CL = 0.1µF RL = ∞ 6 1 4 VOUT = 1V/DIV TIME = 200µs/DIV 08440-031 2 2 1 10 100 1k 10k FREQUENCY (Hz) Figure 17. ADR3425 Output Noise Spectral Density 08440-023 0 0.1 Figure 20. ADR3425 Restart Response from Shutdown Rev. B | Page 14 of 24 08440-030 2 08440-025 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 0 RIPPLE REJECTION RATIO (dB VOUT/VIN) –10 –20 –30 –40 –50 –60 –70 –80 –90 10 CL = 1.1µF CIN = 0.1µF 1 10µV/DIV 100 1k FREQUENCY (Hz) 10k 100k Figure 21. ADR3450 Output Voltage Noise (0.1 Hz to 10 Hz) Figure 24. ADR3450 Ripple Rejection Ratio vs. Frequency VIN 2V/DIV 1 1 CIN = 0µF CL = 0.1µF RL = ∞ 100µV/DIV 08440-033 VOUT 2V/DIV 2 TIME = 200µs/DIV 08440-034 CH1 pk-pk = 446µV CH1 RMS = 60.3µV Figure 22. ADR3450 Output Voltage Noise (10 Hz to 10 kHz) 12 Figure 25. ADR3450 Start-Up Response 10 NOISE DENSITY (µVp-p/√Hz) ENABLE VENABLE = 2V/DIV VIN = 5.5V CIN = CL = 0.1µF RL = ∞ 8 1 6 VOUT = 2V/DIV 4 2 TIME = 200µs/DIV 08440-035 2 1 10 100 1k 10k FREQUENCY (Hz) Figure 23. ADR3450 Output Noise Spectral Density 08440-024 0 0.1 Figure 26. ADR3450 Restart Response from Shutdown Rev. B | Page 15 of 24 08440-026 CH1 pk-pk = 33.4µV CH1 RMS = 5.68µV 08440-032 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 ENABLE 1V/DIV CIN = CL = 0.1µF VIN = 3V RL = 1kΩ 1 ENABLE 2V/DIV CIN = CL = 0.1µF VIN = 5V RL = 1kΩ 1 TIME = 200µs/DIV TIME = 200µs/DIV Figure 27. ADR3425 Shutdown Response Figure 30. ADR3450 Shutdown Response VIN = 100mV/DIV 3.2V 2.7V 500mV/DIV CIN = CL = 0.1µF 1 5.5V CIN = CL = 0.1µF 5.2V 2 VOUT = 10mV/DIV 2 VOUT = 5mV/DIV 08440-037 08440-039 08440-036 2 VOUT = 1V/DIV 2 VOUT = 2V/DIV TIME = 1ms/DIV 1 TIME = 1ms/DIV Figure 28. ADR3425 Line Transient Response IL Figure 31. ADR3450 Line Transient Response +10mA SINKING –3mA SOURCING IL SINKING SINKING –3mA CIN = 0.1µF CL = 0.1µF RL = 250Ω +10mA SOURCING SINKING CIN = 0.1µF CL = 0.1µF RL = 500Ω 5.0V 2.5V VOUT = 20mV/DIV 08440-038 VOUT = 20mV/DIV TIME = 1ms/DIV TIME = 1ms/DIV Figure 29. ADR3425 Load Transient Response Figure 32. ADR3450 Load Transient Response Rev. B | Page 16 of 24 08440-041 08440-040 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 100 90 80 VIN = 5.5 V 7 6 5 4 3 2 1 0 –0.050 –0.045 –0.040 –0.035 –0.030 –0.025 –0.020 –0.015 –0.010 –0.005 0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.055 08440-043 08440-045 SUPPLY CURRENT (µA) 70 60 50 40 30 20 10 0 –40 –25 –10 5 20 35 50 65 80 95 110 08440-042 125 TEMPERATURE (°C) NUMBER OF DEVICES RELATIVE SHIFT IN VOUT (%) Figure 33. Supply Current vs. Temperature 2.0 1.8 1.6 –40°C +25°C +125°C Figure 36. Output Voltage Drift Distribution After Reflow (SHR Drift) 8 TA = +25°C → +150°C → –50°C → +25°C 7 6 NUMBER OF DEVICES SUPPLY CURRENT (mA) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 5 4 3 2 08440-044 1 0 –110 –10 0 10 20 30 –90 –80 –70 –60 –50 –40 –30 –150 –140 –130 –120 –100 –20 40 0 10 20 30 40 50 60 70 80 90 100 ENABLE VOLTAGE (% of VIN) 08440-008 OUTPUT VOLTAGE HYSTERESIS (ppm) Figure 34. Supply Current vs. ENABLE Pin Voltage 10 CL = 0.1µF CL = 1.1µF Figure 37. ADR3450 Thermally Induced Output Voltage Hysteresis Distribution 80 LONG-TERM OUTPUT VOLTAGE DRIFT (ppm) 60 40 20 0 –20 –40 –60 –80 OUTPUT IMPEDANCE (Ω) 1 0.1 0.1 1 10 100 1k 10k 08440-027 0.01 0.01 0 200 400 600 800 1000 FREQUENCY (Hz) ELAPSED TIME (Hours) Figure 35. ADR3450 Output Impedance vs. Frequency Figure 38. ADR3450 Typical Long-Term Output Voltage Drift (Four Devices, 1000 Hours) Rev. B | Page 17 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 TERMINOLOGY Dropout Voltage (VDO) Dropout voltage, sometimes referred to as supply voltage headroom or supply-output voltage differential, is defined as the minimum voltage differential between the input and output such that the output voltage is maintained to within 0.1% accuracy. VDO = (VIN − VOUT)min | IL = constant Because the dropout voltage depends upon the current passing through the device, it is always specified for a given load current. In series-mode devices, dropout voltage typically increases proportionally to load current (see Figure 8 and Figure 14). Temperature Coefficient (TCVOUT) The temperature coefficient relates the change in output voltage to the change in ambient temperature of the device, as normalized by the output voltage at 25°C. This parameter is expressed in ppm/°C and can be determined by the following equation: ΔVOUT _ HYS = VOUT (25°C ) − VOUT _ TC [V] ΔVOUT _ HYS = VOUT (25°C ) − VOUT _ TC VOUT (25°C ) × 10 6 [ppm] where: VOUT(25°C) is the output voltage at 25°C. VOUT_TC is the output voltage after temperature cycling. Long-Term Stability (ΔVOUT_LTD) Long-term stability refers to the shift in output voltage at 50°C after 1000 hours of operation in a 50°C environment. Ambient temperature is kept at 50°C to ensure that the temperature chamber does not switch randomly between heating and cooling, which can cause instability over the 1000 hour measurement. This is also expressed as either a shift in voltage or a difference in ppm from the nominal output. ΔVOUT _ LTD = VOUT (t 1 ) − VOUT (t 0 ) [V] ΔVOUT _ LTD = VOUT (t 1 ) − VOUT (t 0 ) VOUT (t 0 ) TCVOUT = max{VOUT (T1 , T2 , T3 )} − min{VOUT (T1 , T2 , T3 )} VOUT (T2 ) × (T3 − T1 ) × × 10 6 [ppm] 10 6 [ ppm / °C] (1) where: VOUT(T) is the output voltage at Temperature T. T1 = −40°C. T2 = +25°C. T3 = +125°C. This three-point method ensures that TCVOUT accurately portrays the maximum difference between any of the three temperatures at which the output voltage of the part is measured. The TCVOUT for the ADR3412/ADR3425/ADR3430/ADR3433/ ADR3440/ADR3450 is guaranteed via statistical means. This is accomplished by recording output voltage data for a large number of units over temperature, computing TCVOUT for each individual device via Equation 1, then defining the maximum TCVOUT limits as the mean TCVOUT for all devices extended by six standard deviations (6σ). Thermally Induced Output Voltage Hysteresis (ΔVOUT_HYS) Thermally induced output voltage hysteresis represents the change in output voltage after the device is exposed to a specified temperature cycle. This is expressed as either a shift in voltage or a difference in ppm from the nominal output. where: VOUT(t0) is the VOUT at 50°C at Time 0. VOUT(t1) is the VOUT at 50°C after 1000 hours of operation at 50°C. Line Regulation Line regulation refers to the change in output voltage in response to a given change in input voltage and is expressed in percent per volt, ppm per volt, or μV per volt change in input voltage. This parameter accounts for the effects of self-heating. Load Regulation Load regulation refers to the change in output voltage in response to a given change in load current and is expressed in μV per mA, ppm per mA, or ohms of dc output resistance. This parameter accounts for the effects of self-heating. Solder Heat Resistance (SHR) Drift SHR drift refers to the permanent shift in output voltage induced by exposure to reflow soldering, expressed in units of ppm. This is caused by changes in the stress exhibited upon the die by the package materials when exposed to high temperatures. This effect is more pronounced in lead-free soldering processes due to higher reflow temperatures. Rev. B | Page 18 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 THEORY OF OPERATION VIN LONG-TERM STABILITY One of the key parameters of the ADR34xx references is longterm stability. Regardless of output voltage, internal testing during development showed a typical drift of approximately 30 ppm after 1000 hours of continuous, nonloaded operation in a 50°C environment. It is important to understand that long-term stability is not guaranteed by design and that the output from the device may shift beyond the typical 30 ppm specification at any time, especially during the first 200 hours of operation. For systems that require highly stable output voltages over long periods of time, the designer should consider burning in the devices prior to use to minimize the amount of output drift exhibited by the reference over time. See the AN-713 Application Note, The Effect of Long-Term Drift on Voltage References, at www.analog.com for more information regarding the effects of long-term drift and how it can be minimized. ENABLE BAND GAP VOLTAGE REFERENCE VBG VOUT FORCE VOUT SENSE RFB1 GND FORCE RFB2 08440-046 GND SENSE Figure 39. Block Diagram The ADR3412/ADR3425/ADR3430/ADR3433/ADR3440/ ADR3450 use a patented voltage reference architecture to achieve high accuracy, low temperature coefficient (TC), and low noise in a CMOS process. Like all band gap references, the references combine two voltages of opposite TCs to create an output voltage that is nearly independent of ambient temperature. However, unlike traditional band gap voltage references, the temperature-independent voltage of the references are arranged to be the base-emitter voltage, VBE, of a bipolar transistor at room temperature rather than the VBE extrapolated to 0 K (the VBE of bipolar transistor at 0 K is approximately VG0, the band gap voltage of silicon). A corresponding positive-TC voltage is then added to the VBE voltage to compensate for its negative TC. The key benefit of this technique is that the trimming of the initial accuracy and TC can be performed without interfering with one another, thereby increasing overall accuracy across temperature. Curvature correction techniques further reduce the temperature variation. The band gap voltage (VBG) is then buffered and amplified to produce stable output voltages of 2.5 V and 5.0 V. The output buffer can source up to 10 mA and sink up to −3 mA of load current. The ADR34xx family leverages Analog Devices patented DigiTrim technology to achieve high initial accuracy and low TC, and precision layout techniques lead to very low long-term drift and thermal hysteresis. POWER DISSIPATION The ADR34xx voltage references are capable of sourcing up to 10 mA of load current at room temperature across the rated input voltage range. However, when used in applications subject to high ambient temperatures, the input voltage and load current should be carefully monitored to ensure that the device does not exceeded its maximum power dissipation rating. The maximum power dissipation of the device can be calculated via the following equation: PD = TJ − TA θ JA [W ] where: PD is the device power dissipation. TJ is the device junction temperature. TA is the ambient temperature. θJA is the package (junction-to-air) thermal resistance. Because of this relationship, acceptable load current in high temperature conditions may be less than the maximum currentsourcing capability of the device. In no case should the part be operated outside of its maximum power rating because doing so can result in premature failure or permanent damage to the device. Rev. B | Page 19 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 APPLICATIONS INFORMATION BASIC VOLTAGE REFERENCE CONNECTION VIN 2.7V TO 5.5V 4 3 VIN ENABLE VOUT FORCE 6 VOUT SENSE 5 VOUT 2.5V 1µF 0.1µF ADR34xx GND SENSE 2 GND FORCE 1 0.1µF 08440-047 voltages can be sensed accurately. These voltages are fed back into the internal amplifier and used to automatically correct for the voltage drop across the current-carrying output and ground lines, resulting in a highly accurate output voltage across the load. To achieve the best performance, the sense connections should be connected directly to the point in the load where the output voltage should be the most accurate. See Figure 41 for an example application. OUTPUT CAPACITOR(S) SHOULD BE MOUNTED AS CLOSE TO VOUT FORCE PIN AS POSSIBLE. 0.1µF VIN 4V IN 3 ENABLE Figure 40. Basic Reference Connection The circuit shown in Figure 40 illustrates the basic configuration for the ADR34xx references. Bypass capacitors should be connected according to the following guidelines. VOUT FORCE 6 VOUT SENSE 5 LOAD SENSE CONNECTIONS SHOULD CONNECT AS CLOSE TO LOAD DEVICE AS POSSIBLE. INPUT AND OUTPUT CAPACITORS A 1 μF to 10 μF electrolytic or ceramic capacitor can be connected to the input to improve transient response in applications where the supply voltage may fluctuate. An additional 0.1 μF ceramic capacitor should be connected in parallel to reduce high frequency supply noise. A ceramic capacitor of at least a 0.1 μF must be connected to the output to improve stability and help filter out high frequency noise. An additional 1 μF to 10 μF electrolytic or ceramic capacitor can be added in parallel to improve transient performance in response to sudden changes in load current; however, the designer should keep in mind that doing so increases the turn-on time of the device. Best performance and stability is attained with low ESR (for example, less than 1 Ω), low inductance ceramic chip-type output capacitors (X5R, X7R, or similar). If using an electrolytic capacitor on the output, a 0.1 μF ceramic capacitor should be placed in parallel to reduce overall ESR on the output. 1µF 0.1µF ADR34xx GND SENSE 2 GND FORCE 1 Figure 41. Application Showing Kelvin Connection It is always advantageous to use Kelvin connections whenever possible. However, in applications where the IR drop is negligible or an extra set of traces cannot be routed to the load, the force and sense pins for both VOUT and GND can simply be tied together, and the device can be used in the same fashion as a normal 3-terminal reference (as shown in Figure 40). VIN SLEW RATE CONSIDERATIONS In applications with slow-rising input voltage signals, the reference exhibits overshoot or other transient anomalies that appear on the output. These phenomena also appear during shutdown as the internal circuitry loses power. To avoid such conditions, ensure that the input voltage waveform has both a rising and falling slew rate of at least 0.1 V/ms. 4-WIRE KELVIN CONNECTIONS Current flowing through a PCB trace produces an IR voltage drop, and with longer traces, this drop can reach several millivolts or more, introducing a considerable error into the output voltage of the reference. A 1 inch long, 5 millimeter wide trace of 1 ounce copper has a resistance of approximately 100 mΩ at room temperature; at a load current of 10 mA, this can introduce a full millivolt of error. In an ideal board layout, the reference should be mounted as close to the load as possible to minimize the length of the output traces, and, therefore, the error introduced by voltage drop. However, in applications where this is not possible or convenient, force and sense connections (sometimes referred to as Kelvin sensing connections) are provided as a means of minimizing the IR drop and improving accuracy. Kelvin connections work by providing a set of high impedance voltage-sensing lines to the output and ground nodes. Because very little current flows through these connections, the IR drop across their traces is negligible, and the output and ground SHUTDOWN/ENABLE FEATURE The ADR34xx references can be switched to a low power shutdown mode when a voltage of 0.7 V or lower is input to the ENABLE pin. Likewise, the reference becomes operational for ENABLE voltages of 0.85 × VIN or higher. During shutdown, the supply current drops to less than 5 μA, useful in applications that are sensitive to power consumption. If using the shutdown feature, ensure that the ENABLE pin voltage does not fall between 0.7 V and 0.85 × VIN because this causes a large increase in the supply current of the device and may keep the reference from starting up correctly (see Figure 34). If not using the shutdown feature, however, the ENABLE pin can simply be tied to the VIN pin, and the reference remains operational continuously. Rev. B | Page 20 of 24 08440-048 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 SAMPLE APPLICATIONS Negative Reference Figure 42 shows how to connect the ADR3450 and a standard CMOS op amp, such as the AD8663, to provide a negative reference voltage. This configuration provides two main advantages: first, it only requires two devices and, therefore, does not require excessive board space; second, and more importantly, it does not require any external resistors, meaning that the performance of this circuit does not rely on choosing expensive parts with low temperature coefficients to ensure accuracy. +VDD 1µF 0.1µF VIN 4V IN VOUT FORCE 6 R1 10kΩ 0.1µF R2 10kΩ +5V 3 ENABLE V 5 OUT SENSE 1µF 0.1µF ADR3450 GND SENSE 2 GND FORCE 1 +15V ADA4000-1 R3 5kΩ –5V –15V Figure 43. ADR3450 Bipolar Output Reference 4 3 VIN VOUT FORCE 6 AD8663 –5V 0.1µF –VDD 0.1µF 08440-049 Boosted Output Current Reference Figure 44 shows a configuration for obtaining higher current drive capability from the ADR34xx references without sacrificing accuracy. The op amp regulates the current flow through the MOSFET until VOUT equals the output voltage of the reference; current is then drawn directly from VIN instead of from the reference itself, allowing increased current drive capability. VIN ENABLE VOUT SENSE 5 ADR3450 GND SENSE 2 GND FORCE 1 Figure 42. ADR3450 Negative Reference In this configuration, the VOUT pins of the reference sit at virtual ground, and the negative reference voltage and load current are taken directly from the output of the operational amplifier. Note that in applications where the negative supply voltage is close to the reference output voltage, a dual-supply, low offset, rail-torail output amplifier must be used to ensure an accurate output voltage. The operational amplifier must also be able to source or sink an appropriate amount of current for the application. U6 4 3 +16V R1 100Ω 2N7002 VIN ENABLE VOUT FORCE 6 VOUT SENSE 5 0.1µF AD8663 VOUT CL 0.1µF 1µF 0.1µF ADR34xx Bipolar Output Reference Figure 43 shows a bipolar reference configuration. By connecting the output of the ADR3450 to the inverting terminal of an operational amplifier, it is possible to obtain both positive and negative reference voltages. R1 and R2 must be matched as closely as possible to ensure minimal difference between the negative and positive outputs. Resistors with low temperature coefficients must also be used if the circuit is used in environments with large temperature swings; otherwise, a voltage difference develops between the two outputs as the ambient temperature changes. GND SENSE 2 GND FORCE 1 RL 200Ω Figure 44. Boosted Output Current Reference Because the current-sourcing capability of this circuit depends only on the ID rating of the MOSFET, the output drive capability can be adjusted to the application simply by choosing an appropriate MOSFET. In all cases, the VOUT SENSE pin should be tied directly to the load device to maintain maximum output voltage accuracy. Rev. B | Page 21 of 24 08440-051 08440-050 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 OUTLINE DIMENSIONS 3.00 2.90 2.80 1.70 1.60 1.50 PIN 1 INDICATOR 6 5 4 3.00 2.80 2.60 1 2 3 0.95 BSC 1.90 BSC 1.30 1.15 0.90 1.45 MAX 0.95 MIN 0.20 MAX 0.08 MIN 10° 4° 0° 0.55 0.45 0.35 121608-A 0.15 MAX 0.05 MIN 0.50 MAX 0.30 MIN SEATING PLANE 0.60 BSC COMPLIANT TO JEDEC STANDARDS MO-178-AB Figure 45. 6-Lead Small Outline Transistor Package (SOT-23) (RJ-6) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADR3412ARJZ-R2 ADR3412ARJZ-R7 ADR3420ARJZ-R2 ADR3420ARJZ-R7 ADR3425ARJZ-R2 ADR3425ARJZ-R7 ADR3430ARJZ-R2 ADR3430ARJZ-R7 ADR3433ARJZ-R2 ADR3433ARJZ-R7 ADR3440ARJZ-R2 ADR3440ARJZ-R7 ADR3450ARJZ-R2 ADR3450ARJZ-R7 1 Output Voltage (V) 1.200 1.200 2.048 2.048 2.500 2.500 3.000 3.000 3.300 3.300 4.096 4.096 5.000 5.000 Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C Package Description 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 Package Option RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 RJ-6 Ordering Quantity 250 3,000 250 3,000 250 3,000 250 3,000 250 3,000 250 3,000 250 3,000 Branding R2R R2R R2V R2V R2X R2X R2Z R2Z R31 R31 R33 R33 R34 R34 Z = RoHS Compliant Part. Rev. B | Page 22 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 NOTES Rev. B | Page 23 of 24 ADR3412/ADR3420/ADR3425/ADR3430/ADR3433/ADR3440/ADR3450 NOTES ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08440-0-6/10(B) Rev. B | Page 24 of 24