MX584TH

Not Recommended for New Designs This product was manufactured for Maxim by an outside wafer foundry using a process that is no longer available. It is not recommended for new designs. The data sheet remains available for existing users. A Maxim replacement or an industry second-source may be available. Please see the QuickView data sheet for this part or contact technical support for assistance. For further information, contact Maxim’s Applications Tech Support. 19-1115; Rev 2; 11/04 Pin-Programmable, Precision Voltage Reference Maxim’s MX584 is a temperature-compensated, bandgap voltage reference which provides pin-programmable output voltages of +10.00V, +7.50V, +5.00V, and +2.50V. External components are not required for these outputs, but if other voltages are desired, they can be programmed with external resistors. Laser trimming minimizes output error as well as temperature drift, to as low as 10mV and 15ppm/°C with the MX584K. The input voltage range of the MAX584 is 4.5V to 30V. The reference also includes a STROBE input which shuts down the reference output. Typical current drain when ON is 750µA. This drops to about 100µA when the reference is strobed OFF. The MX584 is designed for use with 8- to 14-bit A/D and D/A converters as well as data acquisition systems. It is available in 8-lead TO-99 metal cans, plastic DIPS, CERDIPS, and SO packages. Applications CMOS DAC Reference A/D Converter Reference Features ♦ +10.0V, +7.5V, +5.0V, +2.5V Programmable Outputs ♦ ±10mV Tolerance at +10V (MX584K) ♦ Low Tempco: 15ppm/°C, max (MAX584K) ♦ No External Components or Trims ♦ Short-Circuit Proof ♦ Output Sources and Sinks Current ♦ 10mA Output Current Ordering Information TEMP RANGE PIN-PACKAGE ERROR MX584JH PART 0°C to +70°C 8 TO-99 Can ±30mV MX584KH 0°C to +70°C 8 TO-99 Can ±10mV MX584JN 0°C to +70°C 8 PDIP ±30mV MX584KN 0°C to +70°C 8 PDIP ±10mV MX584JCSA 0°C to +70°C 8 SO ±30mV MX584KCSA 0°C to +70°C 8 SO ±10mV MX584JESA -40°C to +85°C 8 SO ±30mV MX584KESA -40°C to +85°C 8 SO ±10mV 8 Dice ±30mV Measurement Instrumentation MX584JC/D MX584SH -55°C to +125°C 0°C to +70°C 8 TO-99 Can ±30mV Data Loggers MX584TH -55°C to +125°C 8 TO-99 Can ±10mV Precision Analog Systems MX584SQ -55°C to +125°C 8 CERDIP ±30mV Programmable Offset for PGAs MX584TQ -55°C to +125°C 8 CERDIP ±10mV Pin Configuration Typical Operating Circuit TOP VIEW 10.0V 1 8 +VS 5.0V 2 7 CAP 8 MX584 2.5V 3 +VS 6 VBG 10V COMMON 4 0.01µF RFB OUT1 MX584 8-Lead DIP 5V TAB 10.0V 1 7 CAP MX584 2.5V 3 4 6 VBG VOUT MX7533 2 VREF COMMON 8 5.0V 2 1 5 STROBE 0 TO 5V OUT2 GND -5V MAX400 2.4kΩ 5 STROBE 4 COMMON -15V -5V REFERENCE FOR CMOS DAC TO-39 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MX584 General Description MX584 Pin-Programmable, Precision Voltage Reference ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN to COMMON)...............................-0.3V, +40V Continuous Power Dissipation Metal Can (derate 6.7mW/°C above +60°C) ................600mW CERDIP (derate 8mW/°C above +75°C) .......................600mW Plastic DIP (derate 6mW/°C above +75°C) ..................450mW SO (derate 5.3mW/°C above +75°C) ...........................400mW Output Short-Circuit Duration (Note 1) ..........................Indefinite Operating Temperature Range Commercial (J, K) ................................................0°C to +70°C Military (S, T) ...................................................-55°C to +125°C Extended (J, K) .................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Die Junction Temperature (TJ) ..........................-55°C to +150°C Thermal Resistance, Junction to Ambient Metal Can..................................................................+150°C/W CERDIP .....................................................................+125°C/W Plastic DIP.................................................................+160°C/W SO .............................................................................+170°C/W Note 1: Absolute maximum power dissipation must not be exceeded. 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 conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VIN = +15V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL Output Voltage Tolerance CONDITIONS IL = 0mA, at Pin 1 Output Voltage Temperature Coefficient MIN TYP ±30 MAX584K/T ±10 VOUT = +7.5V, MAX584J/S MAX584K/T Quiescent Supply Current IQ ±8 VOUT = +5.0V, MAX584J/S ±15 MAX584K/T ±6 VOUT = +2.5V, MAX584J/S ±7.5 MAX584K/T ±3.5 MX584J/S, all outputs 30 MX584K, all outputs 15 MX584KE, all outputs 20 MX584JE, all outputs 30 MX584T, +10V, +7.5V, +5V out 15 Noise tON en(P-P) Long-Term Stability Short-Circuit Current Line Regulation 2 mV ppm/°C 20 MX584K/T 3 MX584J/S 5 IL = 0mA 750 Quiescent Current Tempco Turn-On Settling Time UNITS ±22 +2.5V out Differential Tempco Between Outputs MAX VOUT = +10V, MAX584J/S ppm/°C 1000 µA 1.5 µA/°C To ±1% 200 µs 0.1Hz to 10Hz 50 µVP-P Noncumulative 25 ppm/khrs 30 mA ISC No load (VOUT + 2.5V) < VIN < +15V 0.005 +15V < VIN < +30V 0.002 _______________________________________________________________________________________ %/V Pin-Programmable, Precision Voltage Reference (VIN = +15V, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL Load Regulation CONDITIONS MIN TYP IL = 0mA to 5mA 30 TA = +25°C Source Output Current Sink (Note 2) UNITS ppm/mA 10 TMIN to TMAX VIN > VOUT + 2.5V IL MAX 5 TMIN to TMAX mA MX584J/K 5 MX584S/T 0.2 TA = -55°C to +85°C MX584S/T 5 Note 2: CLOAD ≥10nF. See the Output Current section. Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) NOISE SPECTRAL DENSITY (mV/√Hz) NO CAP 1000pF 10.000 NO CAP TOTAL NOISE µRMS UP TO SPECIFIED FREQUENCY 10 14 OUTPUT VOLTAGE (V) 100pF 0.01µF 100 +VS = +15V TA = +25°C 12 10 8 6 4 2 9.995 0 1 0 25 70 125 10 100 1k TEMPERATURE (°C) 10k 100k -20 -15 -10 -5 0 5 10 15 20 SINK SOURCE OUTPUT CURRENT (mA) 1M FREQUENCY (Hz) POWER-ON SETTLING CHARACTERISTICS MX584 toc04 12 10.030 10.020 11 10.010 OUTPUT (V) OUTPUT (V) -55 POWER-SUPPLY INPUT (V) VOUT (V) MX584 toc02 1000 MX584 toc01 10.005 OUTPUT VOLTAGE vs. SINK AND SOURCE CURRENT SPECTRAL NOISE DENSITY AND RMS NOISE vs. FREQUENCY MX584 toc03 TYPICAL TEMPERATURE CHARACTERISTICS 10.000 10 20 10 0 0 50 100 150 200 250 SETTLING TIME (µs) _______________________________________________________________________________________ 3 MX584 ELECTRICAL CHARACTERISTICS (continued) MX584 Pin-Programmable, Precision Voltage Reference Detailed Description As shown in Figure 1, most applications of the MX584 require no external components. Connections to +VS and COMMON (COMMON is also tied to the case in the TO-99 metal package) with all other pins unconnected result in a buffered +10.00V output at pin 1. The other pretrimmed voltages are obtained by strapping pins as shown in Table 1. If one or more external buffer amplifiers are connected to the programming pins (pins 2, 3), multiple outputs can be obtained from one reference. Table 1. Programming Pin Connections OUTPUT VOLTAGE (V) 10 Pins 2 and 3 are unconnected 7.5 Connect pins 2 and 3 together 5.0 Connect pins 2 and 1 together 2.5 Connect pins 3 and 1 together Other Output Voltages The MX584 can be adjusted to a different output voltage by adding one or more resistors as in Figure 2. As the diagram shows, the reference can be thought of as a 1.215V bandgap followed by a noninverting amplifier. If R1 and R2 are used alone, the adjustment range is widest but the resolution of the trim may be too coarse, even when a multi-turn trip pot is used. When adding external resistors, output voltages well above 10V can be obtained. R2 should therefore be chosen carefully since it sets the maximum output voltage. R2’s resistance should not be so low as to jeopardize other circuits if R1 is misadjusted. The fixed output voltages can also be varied by connecting only one resistor, as in the dashed lines in Figure 2. Connecting R3 alone raises VOUT while R4 alone lowers it. These resistors (or potentiometers) must have very low temperature coefficients if accuracy over temperature is to be unaffected by the adjustment. PROGRAMMING (OUTPUT ON PIN 1) +(VOUT + 2.5V) TO +30V 8 +VS 10.0V MX584 2.5V VOUT, +2.5V, +5.0V, +7.5V, +10V 2 3 4 Figure 1. Basic Connection for Positive Outputs VSUPPLY 8 +VS If fine adjustment of the output is all that is required, the circuit of Figure 3 is recommended. It provides good stability and resolution for a trim range of ±200mV. If the 2.5V output is adjusted, R2 should be connected to VBG, pin 6, and the trim range should be limited to ±100mV. MX584 10V 1 5V 2 +1.215V R4 2.5V 3 R1 +2.5V* 4kΩ VBG 5 R3 4kΩ COM 4 *THE 2.5V TAP (PIN 3) IS USED INTERNALLY AS A BIAS POINT AND SHOULD NOT BE CHANGED BY MORE THAN 100mV IN ANY TRIM CONFIGURATION. Figure 2. Variable Output Options 4 VOUT 8kΩ Voltage Temperature Coefficient The temperature characteristic of the MX584 consistently follows an "S-curve" as shown in the Typical Operating Characteristics. A five-point 100% test guarantees compliance with -55°C to +125°C specifications and a three-point 100% test guarantees 0°C to +70°C specifications. The tolerance specifications in the Electrical Characteristics table state the maximum deviation from the reference’s initial value at +25°C. By adding the maximum deviation for a given device to its initial tolerance, the total possible error is determined. 5.0V 1 _______________________________________________________________________________________ R2 Pin-Programmable, Precision Voltage Reference MX584 VSUPPLY VIN ≥ 15V 8 +VS MX584 4 1 10.0V VOUT 2 5.0V 2.5V R1 10kΩ C1 0.1µF VOUT 1 6 VBG 470Ω 8 MX584 R2 300kΩ 3 +VS COM COM 2N6040 4 VOUT + 10V AT 4A Figure 6. High-Current Precision Supply Figure 3. Fine Adjustment of Output Voltage (±200mV) VSUPPLY 7 8 8 +VS +VS CAP 0.01µF TO 0.1µF 10.0V MX584 5.0V 1 VOUT 10V VBG 2.5V DARLINGTON NPN 2N8057 2 MX584 6 1 5V 3 COM 2.5V 4 2 3 VOUT = +10V COM *INCREASES COLD START TURN-ON TIME. 4 Figure 4. Additional Noise Filtering with an External Capacitor 1kΩ Figure 7. NPN Output Current Booster VSUPPLY 8 +VS 10V 5 MX584 STRB 2.5V COM 100Ω* 5V 1 2 VOUT 8 +VS 10.0V 1 3 MX584 2.5V 3 I≅ 4 2.5V + 0.75mA R R LOGIC INPUT (HIGH = OFF LOW = ON) 20kΩ 2N2222 COM 4 10kΩ *SEE TEXT. Figure 5. Use of Strobe Terminal Figure 8. Precision Current Limiter _______________________________________________________________________________________ 5 MX584 Pin-Programmable, Precision Voltage Reference ANALOG GROUND 7.5V to 15V 8 8 +VS 10V 0.01µF +VS 1 1 10V 5V 15 14 MX584 MX584 5V 2 VOUT 2 5V MX7533 COM COM 4 5V 16 RFB 1 OUT1 VREF 4 VREF = -5V 4-13 RS 0 TO -5V OUT2 2 GND 3 -7.5V TO -15V MAX400 DIGITAL INPUT 2.4kΩ 5% -15V Figure 10. Low-Power, 10-Bit CMOS DAC Connection Figure 9. Two-Terminal -5V Reference Output Current The MX584 is capable of sinking as well as sourcing current. The circuit is also protected for output shorts to either +VS or ground (COMMON). The output’s voltage versus current characteristic is shown in the Typical Operating Characteristics section. For applications that require the MX584 to sink current, maintain a load capacitance of 10nF or greater for proper operation. -5V COM MX584 8 The turn-on settling performance of the MX584 is shown in the Typical Operating Characteristics. Both coarse and fine transient response is shown. The reference typically settles to 1mV (10V output) within 180µs after power is applied. 1 Strobe Input The STROBE input, pin 5, zeroes the reference output when it is pulled LOW. If no current is pulled from STROBE, operation is normal. The threshold of the input is 200mV, so an open-drain n-channel FET or open-collector transistor driven from logic is recommended (see Figure 5). The current-sinking ability should be at least 500µA and the leakage current should be 5µA or less. While shut down, the MX584 should not be required to source or sink current unless a 0.7V residual output is acceptable. If the reference is required to sink transient current while shut down, the 6 2 -2.5VREF 0.01µF VREF DIGITAL DB0– 13-6 OUTPUTS DB7 BOFS MX7574 10V The bandwidth of the MX584’s output amplifier can be limited by connecting a capacitor between the CAP and VBG pins (see Figure 4). Typical values range from 0.01µF to 0.1µF. The reduction of wideband and feedthrough noise is plotted in a graph in the Typical Operating Characteristics section. 4 +VS Dynamic Performance Noise Filtering +5V 1 VDD 1kΩ 5% 2.5V 3 AIN INPUT 0 TO +2.5V 5 AGND DGND 18 Figure 11. MX584 as Negative 2.5V Reference for a CMOS ADC current flowing out of STROBE should be limited with 100Ω as shown in the dashed connection in Figure 5. Applications Information Precision High-Current Reference A PNP power transistor, or Darlington, is easily connected to the MX584 to greatly increase its output current. The circuit in Figure 6 provides a +10V output at up to 4A. If the load has a significant capacitive component, C1 should be added. If the load is purely resistive, highfrequency supply rejection is improved without C1. An NPN output transistor or Darlington can also be used to boost output current as shown in Figure 7. Current Limiter By adding a single resistor as shown in Figure 8, the MX584 is turned into a precision current limiter for _______________________________________________________________________________________ Pin-Programmable, Precision Voltage Reference Chip Topography Negative 10V Reference In applications which require a -10V, -7.5V, -5.0V, or -2.5V reference, the MX584 can be connected as a two-terminal device and biased like a zener diode. The circuit is shown in Figure 9. +VS and VOUT are connected to the analog ground bus, and the MX584’s COMMON pin is connected, through a resistor, to the negative supply. With 1mA flowing in the reference, the output voltage is typically 2mV greater than what is obtained with the conventional, positive hook-up. When using the 2-terminal connection, the load and the bias resistor must be selected so that the current flowing in the reference is maintained between 1mA and 5mA. The operating temperature range for this connection is limited to -55°C to +85°C. 0.087" (2.209mm) CAP VBG STROBE +VS 0.071" (1.803mm) 10.0V COMMON 5.0V Reference for DACs and ADCs The MX584 is well suited for use with a wide variety of DACs, especially CMOS DACs. Figure 10 shows a circuit in which an MX7533 10-bit DAC outputs 0 to -5V when using a +5V reference. For a positive DAC output, the MX584 can be configured as a two-terminal negative reference as well by using the connection of Figure 9. In Figure 11, an MX7574 CMOS ADC uses an MX584, connected for -2.5V, as its reference input so that the system can operate from ±5V power. The analog input range for the circuit is 0V to +2.5V. 2.5V COMMON Chip Information TRANSISTOR COUNT: 72 SUBSTRATE CONNECTED TO GND _______________________________________________________________________________________ 7 MX584 applications where the driving voltage is 5V to 40V. The programmed current ranges from 0.75mA to 5mA. Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) TO-99, 8LD .EPS MX584 Pin-Programmable, Precision Voltage Reference 8 _______________________________________________________________________________________ Pin-Programmable, Precision Voltage Reference PDIPN.EPS _______________________________________________________________________________________ 9 MX584 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MX584 Pin-Programmable, Precision Voltage Reference 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D C A B e 0∞-8∞ A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.