1ppm/ C, Low-Noise, +2.5V/+4.096V/+5V Voltage References
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1 19-123; Rev 1; 1/1 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V General Description The // are low-noise, precision voltage references with extremely low,.5ppm/ C typical temperature coefficients and excellent, ±.2% initial accuracy. These devices feature buried-zener technology for lowest noise performance. Load-regulation specifications are guaranteed for source and sink currents up to 15m. Excellent line and load regulation and low output impedance at high frequencies make them ideal for high-resolution data-conversion systems up to 16 bits. The is set for a 2.5V output, the is set for a 4.96V output, and the is set for a 5V output. ll three provide for the option of external trimming and noise reduction. pplications High-Resolution nalog-to-digital and Digital-to-nalog Converters High-ccuracy Reference Standard High-ccuracy Industrial and Process Control Digital Voltmeters TE Equipment Precision Current Sources Features Ultra Low, 1ppm/ C Max Tempco Very Low, µvp-p Noise (.1Hz to 1Hz) () ±.2% Initial ccuracy () ±15m Output Source and Sink Current Low, 18mW Power Consumption () Industry-Standard Pinout Optional Noise Reduction and Voltage Trim Excellent Transient Response 8-Pin SO Package vailable Low, 3ppm/1hr Long-Term Stability Stable for ll Capacitive Loads PRT CP CS Ordering Information TEMP. RNGE C to +7 C PIN- PCKGE C to +7 C 8 Plastic DIP 1. 8 SO Ordering Information continued at end of data sheet. MX TEMPCO (ppm/ C) 1. EP -4 C to +85 C 8 Plastic DIP ES -4 C to +85 C 8 SO MJ -55 C to +125 C 8 CERDIP 2.5 // Typical Operating Circuit Pin Configuration 8V TO 36V INPUT TOP VIEW 2.2µF * NR IN TRIM REFERENCE 2.2µF * I.C. IN NR I.C. I.C. TRIM DIP/SO *OPTIONL I.C. = INTERNLLY CONNECTED; DO NOT USE Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at
2 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V // SOLUTE MXIMUM RTINGS (Voltages Referenced to ) IN...-.3V to 4V, TRIM...-.3V to 12V NR...-.3V to 6V Short-Circuit to Duration (V IN 12V)...Continuous Short-Circuit to Duration (V IN 4V)...5s Short-Circuit to IN Duration (V IN 12V)...Continuous Continuous Power Dissipation (T = +7 C) 8-Pin Plastic DIP (derate 9.9mW/ C above +7 C)...727mW Stresses beyond those listed under bsolute 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. ELECTRICL CHRCTERISTICS 8-Pin SO (derate 5.88mW/ C above +7 C)...471mW 8-Pin CERDIP (derate 8.mW/ C above +7 C)...64mW Operating Temperature Ranges MX63 C_... C to +7 C MX63 E_...-4 C to +85 C MX63 MJ C to +125 C Storage Temperature Range C to +15 C Lead Temperature (soldering, 1s)...+3 C (V IN = +1V, I = m, T = T MIN to T MX, unless otherwise noted. Typical values are at T =.) PRMETER SYMOL CONDITIONS T MIN TYP MX UNITS Input Voltage Range V IN C, E, M 8 36 V Output Voltage V V C_ C.5 1. Output Voltage Temperature TCV E_ E.75 ppm/ C Coefficient (Note 1) MJ M C 3 8V V IN 1V E 35 V / M 45 Line Regulation (Note 2) ppm/v V IN 2 5 C 7 1V V IN 36V E 8 M 1 C 1 6 Sourcing: m I 15m E 1 7 Load Regulation (Note 2) ppm/m V / M 3 15 I C 1 6 Supply Current Trim-djustment Range Turn-On Settling Time Output Noise Voltage (Note 3) Temperature Hysteresis Long-Term Stability I IN V t ON e n V /t Sinking: -15m I m (Figure 1) To ±.1% of final value.1hz f 1Hz 1Hz f 1kHz (Note 4) E M C, E, M C, E, M ±15 ± m mv µs µvp-p µv RMS ppm ppm/ 1hr 2
3 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V ELECTRICL CHRCTERISTICS (V IN = +1V, I = m, T = T MIN to T MX, unless otherwise noted. Typical values are at T =.) Output Voltage PRMETER Input Voltage Range Output Voltage Temperature Coefficient (Note 1) Line Regulation (Note 2) Load Regulation (Note 2) Supply Current SYMOL V IN V CONDITIONS C_ C.5 1. TCV E_ E.75 ppm/ C V / V IN V / I MJ 8V V IN 1V 1V V IN 36V Sourcing: m I 15m Sinking: -15m I m I IN C, E, M 3.2 T C, E, M MIN TYP MX M C 3 E 35 M C 7 E 8 M 1 C 1 6 E 1 7 M 3 9 C 1 6 E 1 7 M 7 18 UNITS V V ppm/v ppm/m m // Trim-djustment Range Temperature Hysteresis V (Figure 1) C, E, M ±24 ±4 mv Turn-On Settling Time t ON To ±.1% of final value 8 µs.1hz f 1Hz Output Noise Voltage (Note 3) e n 1Hz f 1kHz (Note 4) Long-Term Stability V /t 2.4 µvp-p µv RMS 2 ppm 3 ppm/ 1hr 3
4 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V // ELECTRICL CHRCTERISTICS (V IN = +1V, I = m, T = T MIN to T MX, unless otherwise noted. Typical values are at T =.) Output Voltage PRMETER Input Voltage Range Output Voltage Temperature Coefficient (Note 1) Line Regulation (Note 2) Load Regulation (Note 2) SYMOL V IN V TCV V / V IN V / I C_ E_ MJ 8V V IN 1V 1V V IN 36V CONDITIONS Sourcing: m I 15m Sinking: -15m I m C, E, M MIN TYP MX C.5 1. E Supply Current I IN C, E, M 3.3 T M C 3 E 35 M C 7 E 8 M 1 C 1 6 E 1 7 M 2 9 C 1 6 E 1 7 M 6 15 UNITS V V ppm/ C ppm/v ppm/m m Trim-djustment Range Temperature Hysteresis V (Figure 1) C, E, M ±3 ±5 mv Turn-On Settling Time t ON To ±.1% of final value.1hz f 1Hz Output Noise Voltage (Note 3) e n 1Hz f 1kHz (Note 4) Long-Term Stability V /t 1 µs 3. µvp-p µv RMS 2 ppm 3 ppm/ 1hr Note 1: Temperature coefficient is measured by the box method; i.e., the maximum V is divided by T x V. Note 2: Line regulation ( V / (V x VIN )) and load regulation ( V / (V x I )) are measured with pulses and do not include output voltage changes due to die-temperature changes. Note 3: Noise specifications are guaranteed by design. Note 4: Temperature hysteresis is specified at T = by measuring V before and after changing temperature by, using the plastic DIP package. 4
5 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V V (ppm) V (µv) Typical Operating Characteristics (V IN = +1V, I = m, T =, unless otherwise noted.) V (mv) NORMLIZED PUT VOLTGE vs. TEMPERTURE TEMPERTURE ( C) CHNGE IN PUT VOLTGE vs. INPUT VOLTGE V IN (V) CHNGE IN PUT VOLTGE vs. PUT CURRENT T = -4 C T = +85 C T = I (m) V (ppm) V (µv) SUPPLY CURRENT (m) V (mv) NORMLIZED PUT VOLTGE vs. TEMPERTURE TEMPERTURE ( C) CHNGE IN PUT VOLTGE vs. PUT CURRENT T = -4 C T = +85 C T = I (m) SUPPLY CURRENT vs. SUPPLY VOLTGE SUPPLY VOLTGE (V) V (ppm) V (µv) SUPPLY CURRENT (m) V (mv) NORMLIZED PUT VOLTGE vs. TEMPERTURE TEMPERTURE ( C) CHNGE IN PUT VOLTGE vs. PUT CURRENT T = T = -4 C T = +85 C I (m) SUPPLY CURRENT vs. TEMPERTURE TEMPERTURE ( C) V (ppm) // 5
6 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V // Typical Operating Characteristics (continued) (V IN = +1V, I = m, T =, unless otherwise noted.) PUT NOISE DENSITY (nv/ Hz) RIPPLE REJECTION (d) PUT NOISE-VOLTGE DENSITY vs. FREQUENCY C NR = µf C NR = 1µF 1 1 1k 1k RIPPLE REJECTION vs. FREQUENCY (C NR = 1µF) 1 1 1k 1k PUT NOISE DENSITY (nv/ Hz) PUT IMPEDNCE (Ω) PUT NOISE-VOLTGE DENSITY vs. FREQUENCY 1 1 1k 1k PUT IMPEDNCE vs. FREQUENCY I SINK = 5m C NR = µf C NR = 1µF I SOURCE = 5m k 1k 1k 1M PUT NOISE DENSITY (nv/ Hz) RIPPLE REJECTION (d) PUT NOISE-VOLTGE DENSITY vs. FREQUENCY C NR = µf C NR = 1µF 1 1 1k 1k RIPPLE REJECTION vs. FREQUENCY (C NR = µf) 1 1 1k 1k C = C NR = µf.1hz to 1Hz NOISE -16 C = C NR = µf.1hz to 1Hz NOISE -17 C = C NR = µf.1hz to 1Hz NOISE -18 V,.5µV/div V, 1µV/div V, 1µV/div 1s/div 1s/div 1s/div 6
7 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V Typical Operating Characteristics (continued) (V IN = +1V, I = m, T =, unless otherwise noted.) LOD-TRNSIENT RESPONSE (SOURCING) 2µs/div : I, 1m/div (SOURCING) : V, 5µV/div LOD-TRNSIENT RESPONSE m -1m -1m +1m LOD-TRNSIENT RESPONSE (SINKING) : I, 1m/div (SINKING) : V, 5µV/div 2µs/div -2 TURN-ON ND TURN-OFF TRNSIENT RESPONSE -22 1m m +1V // V IN = 1V C = C NR = µf C IN = C = C NR = µf 1µs/div : I (±1m SOURCE ND SINK), 2m/div, C COUPLED : V, 2mV/div, C COUPLED : V IN, 1V/div : V, 1V/div 1µs/div TURN-ON ND TURN-OFF TRNSIENT RESPONSE -23 TURN-ON ND TURN-OFF TRNSIENT RESPONSE V +1V C IN = C = C NR = µf C IN = C = C NR = µf 1µs/div 1µs/div : V IN, 1V/div : V, 1V/div : V IN, 1V/div : V, 1V/div 7
8 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V // Pin Description PIN NME FUNCTION 1, 7, 8 I.C. Internally Connected. Do not use. 2 IN Positive Power-Supply Input 3 NR 4 Ground 5 TRIM Noise Reduction. Optional capacitor connection for wideband noise reduction. Leave open if not used (Figure 2). External Trim Input. llows ±1% output adjustment (Figure 1). Leave open if not used. 6 Voltage Reference Output Detailed Description Temperature Stability The // are highly stable, low-noise voltage references that use a low-power temperature-compensation scheme to achieve laboratorystandard temperature stability. This produces a nearly flat temperature curve, yet does not require the power associated with heated references. The output voltage can be trimmed a minimum of.6% by connecting a 1kΩ potentiometer between and, and connecting its tap to the TRIM pin, as shown in Figure 1. The external trimming does not affect temperature stability. Noise Reduction To augment wideband noise reduction, add a 1µF capacitor to the NR pin (Figure 2). Larger values do not improve noise appreciably (see Typical Operating Characteristics). Noise in the power-supply input can affect output noise, but can be reduced by adding an optional bypass capacitor to the IN pin and. ypassing The // are stable with capacitive load values from µf to 1µF, for all values of load current. dding an output bypass capacitor can help reduce noise and output glitching caused by load transients. pplications Information Negative Regulator Figure 3 shows how both a +5V and -5V precision reference can be obtained from a single, unregulated +5V supply. MX865 generates approximately ±9V to operate the reference and MX4 inverting amplifier. The +5V is inverted by the ultra-low offset MX4 op amp. Resistor R1 is optional, and may be used to trim the ±5V references. R2 and R4 should be matched, both in absolute resistance and temperature coefficient. R3 is optional, and is adjusted to set the -5V reference. 8V TO 36V INPUT 8V TO 36V INPUT NR IN TRIM REFERENCE 1kΩ * NR IN TRIM REFERENCE 1µF *OPTIONL Figure 1. Output Voltage djustment Figure 2. Noise-Reduction Capacitor 8
9 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V 3.3µF 3.3µF C1+ C2+ 2.2µF +5V INPUT V CC V+ MX865 V- C1 2.2µF C2 1µF NR IN Figure 3. +5V and -5V References from a Single +5V Supply Ordering Information (continued) PRT TEMP. RNGE C2- C1- PIN- PCKGE MX. TEMPCO (ppm/ C) CP C to +7 C 8 Plastic DIP 1. CS C to +7 C 8 SO 1. EP -4 C to +85 C 8 Plastic DIP ES -4 C to +85 C 8 SO MJ -55 C to +125 C 8 CERDIP 2.5 CP C to +7 C 8 Plastic DIP 1. CS C to +7 C 8 SO 1. EP -4 C to +85 C 8 Plastic DIP ES -4 C to +85 C 8 SO MJ -55 C to +125 C 8 CERDIP 2.5 TRIM R1 1kΩ R2 1kΩ R3 C3 1kΩ 2.2µF R4 1kΩ C4 1µF MX4.1µF +REFERENCE.1µF -REFERENCE Chip Information TRNSISTOR COUNT: 435 // 9
10 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V // Package Information SOICN.EPS PDIPN.EPS 1
11 1ppm/ C, Low-Noise, +2.5V/+4.96V/+5V Package Information (continued) CDIPS.EPS // 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. Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, C 9486 (48) Maxim Integrated Products Printed US is a registered trademark of Maxim Integrated Products.
MAX6325/MAX6341/MAX6350
VILLE 19-123; Rev 1; 1/1 Pin onfiguration 8V TO 36V INPUT TOP VIEW 2.2µF * NR IN TRI REFERENE 2.2µF * I.. IN NR 1 2 3 4 DIP/SO 8 7 6 5 I.. I.. TRI *OPTIONL I.. = INTERNLLY ONNETED; DO NOT USE For pricing,
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