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© 2014 Silicon Laboratories, Inc. All rights reserved.
FEATURES
Improved Electrical Performance over MAX6025 Initial Accuracy: 0.08% (max) – TS6001A 0.16% (max) – TS6001B Temperature Coefficient: 7ppm/°C (max) – TS6001A 10ppm/°C (max) – TS6001B Quiescent Supply Current: 35 μA (max) Low Supply Current Change with V IN: 0.1μA/V Output Source/Sink Current: ±500µA Low Dropout at 500 μA Load Current: 75mV Load Regulation: 30ppm/mA Line Regulation: 10ppm/V Stable with C LOAD up to 2200pF
APPLICATIONS
Battery-Operated Equipment Data Acquisition Systems Hand-Held Equipment Smart Industrial Transmitters Industrial and Process-Control Systems Precision 3V/5V Systems Hard-Disk Drives
DESCRIPTION
The TS6001 is a 3-terminal, series-mode 2.5-V precision voltage reference and is a pin-for-pin, identical to the MAX6025 voltage reference with improved electrical performance. The TS6001 consumes only 31 μA of supply current at no-load, exhibits an initial output vo ltage accuracy of less than 0.08%, and a low output voltage temperature coefficient of 7ppm/°C. In addition, the TS6001’s output stage is stable for all capacitive loads to 2200pF and is capable of sinking and sourcing load currents up to 500µA. Since the TS6001 is a series-mode voltage reference, its supply current is not affected by changes in the applied supply voltage unlike two-terminal shunt- mode references that require an external resistor. The TS6001’s small form factor and low supply current operation all combine to make it an ideal choice in low-power, precision applications. The TS6001 is fully specified over the -40°C to +85°C temperature range and is available in a 3-pin SOT23 package. A 7ppm/°C, 0.08% Precision +2.5V Voltage Reference in SOT23 TYPICAL APPLICATION CIRCUIT TEMPERATURE DRIFT- °C OUTPUT VOLTAGE - Volt -40 -15 10 35 85 60 2.4995 2.4990 THREE TYPICAL DEVICES DEVICE #1 DEVICE #2 DEVICE #3 2.5005 2.5000 2.5010 Output Voltage Temperature Drift
Page 2 TS6001 Rev. 1.0 ABSOLUTE MAXIMUM RATINGS Continuous Power Dissipation (TA = +70°C) Electrical and thermal stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other condition beyond those indicated in the op erational sections of the specifications is not implied. Exposure to any absolute maximum rating conditions for extended periods may affect device reliability and lifetime. PACKAGE/ORDERING INFORMATION ORDER NUMBER PART MARKING CARRIERQUANTITY TS6001AIG325 AAG Tape & Reel ----- TS6001AIG325T Tape & Reel 3000 TS6001BIG325 AAH Tape & Reel ----- TS6001BIG325T Tape & Reel 3000 Lead-free Program: Silicon Labs supplies only lead-free packaging. Consult Silicon Labs for products specified with wider operating temperature ranges.
TS6001 Rev. 1.0 Page 3
ELECTRICAL CHARACTERISTICS
VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C. See Note 1. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS OUTPUT Output Voltage VOUT T A = +25°C TS6001A 2.498 2.500 2.502 V -0.08 0.08 % TS6001B 2.496 2.500 2.504 V -0.16 0.16 % Output Voltage Temperature Coefficient (See Note 2) TCVOUT 0°C ≤ TA ≤ +85°C TS6001A 2 7 ppm/°C -40°C ≤ TA ≤ +85°C 2.5 10 0°C ≤ TA ≤ +85°C TS6001B 3 10 Line Regulation (∆VOUT/VOUT) /∆VIN (VOUT + 0.2V) ≤ VIN ≤ 12.6V 10 30 ppm/V Load Regulation (∆VOUT/VOUT) /∆IOUT Sourcing 0 ≤ IOUT ≤ 500μA 30 240 ppm/mA Sinking -500 μA ≤ IOUT ≤ 0 70 320 Dropout Voltage (See Note 3) V IN -VOUT I OUT = 500μA 75 150 mV OUT Short-Circuit Current ISC VOUT Short to GND 4 mA VOUT Short to IN 4 Temperature Hysteresis (See Note 4) 100 ppm Long-Term Stability (See Note 5) ∆VOUT/ time 168hr at T A = +25°C 75 ppm/ 168hr DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz 50 μVP-P f = 10Hz to 10kHz 75 μVRMS Ripple Rejection ∆VOUT/ ∆VIN V IN = 5V ±100mV, f = 120Hz 82 dB Turn-On Settling Time tR To V OUT = 0.1% of final value, COUT = 50 pF 340 μs Capacitive-Load Stability Range C OUT See Note 6 0 2200 pF INPUT Supply Voltage Range VIN Guaranteed by line-regulation test V OUT + 0.2 12.6 V Quiescent Supply Current IIN 31 35 μA Change in Supply Current I IN/VIN (V OUT + 0.2V) ≤ VIN ≤ 12.6V 0.1 2 μA/V Note 1: All devices are 100% production tested at TA = +25°C and are guaranteed by characterization for TA = TMIN to TMAX, as specified. Note 2: Temperature Coefficient is measured by the “box” method; i.e., the maximum ∆VOUT is divided by the maximum ∆T. Note 3: Dropout voltage is the minimum input voltage at which VOUT changes ≤0.2% from VOUT at VIN = 5.0V. Note 4: Temperature hysteresis is defined as the change in the +25°C output voltage before and after cycling the device from +25°C to TMIN to +25°C and from +25°C to TMAX to +25°C. Note 5: Reference long-term drift or stability listed in the table is an intermediate result of a 1000-hour evaluation. Soldered onto a printed circuit board (pcb), voltage references exhibit more drift early in the evaluation because of assembly-induced differential stresses between the package and the pcb. Note 6: Not production tested; guaranteed by design.
Page 4 TS6001 Rev. 1.0 Line Regulation OUTPUT VOLTAGE CHANGE - ppm SUPPLY VOLTAGE - Volt -40 120 TA = -40°C TA = +85°C LOAD CURRENT- mA TA = +85°C Load Regulation -0.5 0.50.25 -0.25 -160 -80 160 SOURCE CURRENT- µA DROPOUT VOLTAGE - V Dropout Voltage vs Source Current 400 800 0 1000600 200 0.1 0.4 0.2 0.3 TIME - Hours OUTPUT VOLTAGE CHANGE - ppm TA = +25°C TA = +85°C TA = -40°C 8 12 2 14 10 4 6 TA = -40°C TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5V; IOUT = 0mA; TA = +25°C, unless otherwise noted. TA = +25°C TA = +25°C THREE TYPICAL DEVICES DEVICE #1 0 42 84 168126
2.5050 OUTPUT VOLTAGE - Volt
DEVICE #2 DEVICE #3 Long-Term Output Voltage Drift TEMPERATURE DRIFT- °C OUTPUT VOLTAGE - Volt -40 -15 10 35 85 60 2.4995 2.4990 THREE TYPICAL DEVICES DEVICE #1 DEVICE #2 DEVICE #3 2.5005 2.5000 2.5010 Output Voltage Temperature Drift OUTPUT VOLTAGE ERROR - % NUMBER OF UNITS 0 0.02 Output Voltage Histogram -0.02 0.04 2.5025 2.5000 2.4950 2.4975
TS6001 Rev. 1.0 Page 5 Power Supply Rejection vs Frequency 0.1Hz to 10Hz Output Noise VOUT(N) 10µV/DIV OUTPUT IMPEDANCE - Ω FREQUENCY - Hz 0.1 100 10k 0.1 1 100 1M 10k 1s/DIV 200µs/DIV Power-On Transient Response INPUT 2V/DIV Supply Current vs Input Voltage SUPPLY CURENT - µA INPUT VOLTAGE - Volt 8 12 2 14 Supply Current vs Temperature TEMPERATURE - °C SUPPLY CURENT - µA VCC = +2.5V, +5.5V VCC =+12.5V -40 -15 10 35 85 60 Output Impedance vs Frequency OUTPUT 1V/DIV VCC =+7.5V 4 6 TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5V; IOUT = 0mA; TA = +25°C, unless otherwise noted. 46µVPP POWER SUPPLY REJECTION – mV/V FREQUENCY - Hz VCC =+5.5V±0.25V 0.01 100 100 1k 10k 1M 100k 0.1
Page 6 TS6001 Rev. 1.0 Line Transient Response 2µs/DIV 10µs/DIV IOUT 1mA/DIV OUTPUT 200mV/DIV VIN =5V±0.25V, AC-Coupled VIN 200mV/DIV OUTPUT 100mV/DIV Large-signal Load Transient Response IOUT = 0mA → 1mA → 0mA, AC-Coupled 10µs/DIV Small-signal Load Transient Response IOUT 50µA/DIV OUTPUT 20mV/DIV IOUT = 0µA → 50µA → 0µA, AC-Coupled TYPICAL PERFORMANCE CHARACTERISTICS VIN = +5V; IOUT = 0mA; TA = +25°C, unless otherwise noted.
TS6001 Rev. 1.0 Page 7 PIN FUNCTIONS PIN NAME FUNCTION
1 IN Supply Voltage Input
2 OUT +2.5V Output
3 GND Ground
DESCRIPTION/THEORY OF OPERATION The TS6001 incorporates a precision 1.25-V bandgap reference that is followed by an output amplifier configured to amplify the base bandgap output voltage to a 2.5-V output. The design of the bandgap reference incorporates proprietary circuit design techniques to achieve its low temperature coefficient of 7ppm/°C and initial output voltage accuracy less than 0.08%. The design of the output amplifier’s frequency compensation does not require a separate compensation capacitor and is stable with capacitive loads up to 2200pF. The design of the output amplifier also incorporates low headroom design as it can source and sink load currents to 500μA with a dropout voltage less than 100mV. APPLICATIONS INFORMATION Power Supply Input Bypass Capacitance If there are other analog ICs within 1 to 2 inches of the TS6001 with their own bypass capacitors to GND, the TS6001 would not then require its own bypass capacitor. If this is not the case, then it is considered good analog circuit engineering practice to place a 0.1µF ceramic capacitor in as close proximity to the TS6001 as practical with very short pcb track lengths. Output/Load Capacitance Considerations As mentioned previously, the TS6001 does not require a separate, external capacitor at V OUT for transient response stability as it is stable for capacitive loads up to 2200pF. For improved load regulation transient response, the use of a capacitor at V OUT helps to reduce output voltage overshoot/undershoot to transient load current conditions. Figure 1 illustrates the TS6001’s transient load regulation performance with C LOAD = 0pF to a 50-µA transient upon a 175-µA steady-state load current. Peak transients are approximately 20mV and the TS6001 settles in less than 8µs. As shown in Figure 2, adding a capacitive load reduces peak transients at the expense of settling time. In this case, the TS6001’s output was loaded with C LOAD = 1000pF and subjected to the same transient load current profile. Peak transients were reduced to less than 10mV and the TS6001 settled in less than 10µs. Figure 2: TS6001 Transient Load Regulation Response, CLOAD = 1000pF IOUT 50µA/DIV OUTPUT 20mV/DIV IOUT = 175µA → 225µA → 175µA Figure 1: TS6001 Transient Load Regulation Response, CLOAD = 0pF IOUT = 175µA → 225µA → 175µA IOUT 50µA/DIV OUTPUT 20mV/DIV
TS6001 Rev. 1.0 Page 11 Generating Positive and Negative Low-Power Voltage References The circuit in Figure 8 uses a CD4049 hex inverter and a few external capacitors as the power supply to a dual-supply precision op amp to form a ±2.5V precision, bipolar output voltage reference around the TS6001. The CD4049-based circuit is a discrete charge pump voltage doubler/inverter that generates ±6V supplies for any precision, micropower op amp with V OS and TCV OS specifications consistent with the TS6001’s initial accuracy and output voltage drift performance. Figure 8: Generating Positive and Negative 2.5V References from a Single +3V or +5V Supply.
Page 12 Silicon Laboratories, Inc. TS6001 Rev. 1.0
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+1 (512) 416-8500 ▪ www.silabs.com PACKAGE OUTLINE DRAWING 3-Pin SOT23 Package Outline Drawing (N.B., Drawings are not to scale) Patent Notice Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low-power, small size, analog-intensive mixed-signal solutions. Silicon Labs' extensive patent portfolio is a testament to our unique approach and world-class engineering team. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc. Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.
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