ICL7652PG4

Advanced . Extremely Low Offset . Extremely Low Change Temperature. Low . AVD . CMRR . Single-SupplyOperation . Common-Mode Input the Negative Rail Offset ..5 in Offset ..0.003 . Input Voltage. ICL7652 PRECISION CHOPPER-STABILIZED OPERATIONAL AMPLIFIER 03343, OCTOBER 1989 LinCMOSTM D, JG, OR P PACKAGE !lV Max Voltage (TOP VIEW) with !lV/OC Typ Current. ..30 IN- pA Max IN ...120 dB Min and kSVR + VOO- ...110 7 3 6 VOO+ OUT 4 5 C RETURN AVAILABLE No Noise Degradation Capacitors Connected Voltage Range with ICL7652 OPTIONS PACKAGE Includes IvlO max SMALL- AT 25°C i OUTLINE External CERAMIC (D) to VDD- 0°C to 70°C descri p tion The CXB 12 dB Min TA . -;-u; CXA[ I 5 I1V ICL7652D I PLASTIC DIP DIP (JG) (P) ICL7652P ICL7652JG D package is available taped and reeled. Add "R" suffix to device type (i.e., ICL7652DR). is a precision chopper-stabilized DISTRIBUTION OF ICl7652 INPUT OFFSET VOl TAG E operational amplifier manufactured using Texas Instruments Advanced LinCMOSTM process. This process, in conjunction with unique chopperstabilization circuitry, produces an operational amplifier whose performance matches or exceeds that of similar devices available today. 32 28 ~ o Chopper stabilization techniques make possible extremely high dc precision by continuously nulling input offset voltage even with variations in temperature, time, common-mode voltage, and supply voltage. Additionally, low-frequency noise voltage is significantly reduced. This precision, coupled with the extremely high input impedance of the CMOS input stage, makes the ICL7652 an ideal choice for low-Ievel signal-processing applications such as strain couples, and other transducer I 24 ~ 'c :;) 20 O ~ tU "E Q) 16 12 u .. Q) Q. gauges, thermoamplifiers. The ICL7652 input common-mode range includes the negative rail, thereby providing superior performance in either single-supply or split- 8 -3 -2 -1 VIO -Input O 1 2 Offset Voltage -~V 3 supply applications, even at supply voltages as low as :t1.9 V. The ICL7652 also features fast overload recovery time. Two external capacitors are required to operate the device; however, the on-chip chopper control circuitry is transparent to the user . The device inputs and output are designed to withstand -100-mA surge currents without sustaining latchup. Additionally, the ICL7652 incorporates internal ESD protection circuits that prevent functional failures at voltages up to 2000 Vas tested under MIL-STD-883C, Method 3015; however, care should be exercised in handling these devices, as exposure to ESD may result in degradation of the device parametric performance. The ICL7652 Advanced is characterized LinCMOS is a trademark for operation of Texas Instruments PROOUCTION OATAdocumentscontain information currentas of publicationdate. Productsconformto specifications per the terms of Texas Instruments standardwarranty. Productionprocessingdoes not necessarilyincludetesting of all parameters. from O°C to 70°C. Incorporated. Copyright @ 1989, Texas Instruments Incorporated 1 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER functional CHOPPER-STABILIZED block diagram voo+ I IN + -I I , OUT IN-+A ~-- ~ NULL LC RETURN 2 AQ 9 Q cxAT VDD- 98 TCXB T O VDD-'-y--fOR C RETURN ~ EXTERNA L COMPONENTS TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS. TEXAS 75265 ~ Advanced absolute maximum ratings Supplyvoltage, VDD+ Supply VDD- voltage, over (see operating Note ICL7652 PRECISION CHOPPER-STABILIZED OPERATIONAL AMPLIFIER LinCMOSTM free-air temperature range (unless otherwise noted) 1) 8V 8 V Differentialinputvoltage(seeNote2) ::t16V Inputvoltagerange,VI(anyinput) Input current, Output II (each current, Duration ::t8V input) ::t5 mA 10 ::t50 of short-circuit current at (or below) 25°C (see Note 3) Continuoustotaldissipation.. See Operatingfree-airtemperature Storage temperature mA unlimited range,TA Dissipation RatingTable 0°Cto70°C range. 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or p package. 260°C Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG 300°C NOTES: 1. All voltage 2. Differential 3. The output dissipation values, except differential voltages, are with respect to the midpoint between VDD+ and VDD- . voltages are at the noninverting input with respect to the inverting input. may be shorted to either supply. Temperature and/or supply voltages must be limited to ensure that the maximum rating is not exceeded. DISSIPATION operating RATING TABLE TA = 70°C TA ~ 25°C POWER RATING DERATING FACTOR ABOVE T A = 25°C D 725 mW 5.8 mW/OC 464 mW JG p 1050 mW 8.4 mW/OC 672 mW 1000 mW 8.0 mW/OC 640 mW PACKAGE recommended package. POWER RATING conditions Supply voltage, VOO Common-mode input voltage, V".. TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 75265 3 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER electrical characteristics at specified CHOPPER-STABILIZED free-air PARAMETER temperature, VDD :t = :t 5 V (unless TEST CONDITIONS TAt MIN 26°C VIO Input aVIO Temperature offset coefficient of input offset voltage I UNIT 5 0.6 = AS 0 = 50.0. 0.003 0.003 2 26°C 26°C offset !lV 7.25 Full range VIC 118 MAX TYP Full range Input noted) voltage Input offset voltage long-term drift (see Note 4) 110 otherwise 0.05 0.06 30 current Full range 4 26°C Input bias current pA 100 Full range 30 pA 100 -5 VICR Common-mode AS input voltage range = 50.Q Full range v to 3.1 VOM+ Maximum positive peak output voltage swing VOM- Maximum negative peak output voltage swing AVO Large-signal fch Internal chopping frequency CMRR 4.8 25°C RL = 10 k.Q. v Full range RL = -4.9 25°C 10 kQ v Full range differential voltage amplification = 10 Full range rejection ratio = 0, VIC = VICR min, R~ = 50 9 kSVR Supply-voltage rejection ratio (~VDD :t / ~VIO) 100 Supply current VDD:t = :t1.9Vto:tBV, Vo = 0, RR = 50.0. Vo = No load 0 dB kQ 114 25°C Vo Common-mode 150 25°C RL VO=:t4V, 25°C 110 Full range 104 25°C 110 Full range I 25°C- 450 140 Hz dB 135 dB 104 1.5 2.4 mA 3.5 Full range NOTE 4: Typical values are based on the input offset voltage shift observed through 168 hours of operating life test at T A = 150°C extrapolated to T A = 25°C using the Arrhenius equation and assuming an activation energy of 0.96 eV. operating characteristics at specified free-air PARAMETER SA+ SR- Positive slew rate at unity gain Negative slew rate at unity gain Vn Equivalent input noise voltage (see Note 5) VN(PP) Peak-to-peak L!n- Equivalent equivalent input noise voltage input noise current temperature, TEST CONDITIONS I f/Jm product Phase margin at unity gain VO=:t2.3V, RL = 10 k.Q., CL = 100 pF MIN IA' otherwise TYP 2 Full range 1.5 25°C 2.3 Full range 1.8 MAX -r-uNIT V/I1S 3.1 V/~S 25°C 94 f = 1 kHz 25°C 23 f = 0 to 1 Hz 25°C 0.8 f = Oto10Hz 25°C 2.8 nV/--IRZ f = 1 kHz 25°C 0.004 I1V ~ RL = 10 kg, CL = 100 pF RL = 10 k.Q., noted) 2.8 f = 10Hz tFul1 range is 0°C to 70°C. NOTE 5: This parameter is tested on a sample basis for the ICL7652. has no bearing on testing or nontesting of other parameters. 4 = :t 5 V (unless 25°C f = 10 kHz, Gain-bandwidth VDD:t GL = 10~pF 25°C 1.9 25°C 48° For other test requirements, please contact the factory. MHz This statement Advanced TYPICAL LinCMOSTM ICL7652 PRECISION CHOPPER-STABILIZED OPERATIONAL AMPLIFIER CHARACTERISTICS table of graphs FIGURE 118 Input bias current Input offset current ~ Maximum peak-to-peak ~ VOM AVO 100 IOS SA output voltage swing Maximum peak output voltage swing Differential voltage amplification Supply current Short-circuit output current Slew rate Pulse response Gain-bandwidth Vn I/>m Equivalent product input noise voltage Phase margin Phase shift vs Common-mode vs Temperature 2 vs Temperature 3 vs Frequency vs Output current 5, 6 vs Temperature 7, 8 9 vs Frequency vs Temperature 10 vs Supply voltage 11 vs Temperature 12 vs Supply voltage 13 vs Temperature 14 vs Supply voltage 15 vs Temperature 16 BOX 655303 1 4 Small-signal 17 Large-signal vs Supply voltage 18 vs Temperature 20 vs Frequency 21 vs Supply voltage 22 vs Temperature 23 vs Load capacitance 24 vs Frequency .DALLAS, ~ 19 9 5 INSTRUMENTS POST OFFICE input voltage TEXAS 75265 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER CHOPPER-STABILIZED TYPICAL CHARACTERISTICSt I (1) 01 ~ 0 > ~ c. "5 Q. "5 o ~ 10 (1) 11. E Q) t ~ u -a; UI = o .9 ~ 10 (1) 11. 5 Do ~ T A -Free-Air Temperature FIGURE -°C 3 tOata at high and low temperatures are applicable to ICL7652 only within its noted operating free-air temperature range of 0°C to 70°C. The extended data have been retained to show typical performance of devices selected from the same process but characterized for operation from -55°C to 125°C. 6 INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 75265 ~ Advanced LinCMOSTM ICL7652 PRECISION CHOPPER-STABILIZED OPERATIONAL AMPLIFIER TYPICAL CHARACTERISTICSt MAXIMUM PEAK OUTPUT OUTPUT 1101-Output Current -50 -25 1101-Output 5 VOlTAGE MAXIMUM 0 25 50 Temperature FIGURE Current -75 -50 -°C -25 6 VOlTAGE vs TEMPERATURE 0 T A -Free-Air 7 -mA PEAK OUTPUT FREE-AIR 75 VOlTAGE vs CURRENT FIGURE vs TEMPERATURE T A -Free-Air PEAK OUTPUT OUTPUT -mA PEAK OUTPUT FREE-AIR -75 MAXIMUM vs CURRENT FIGURE MAXIMUM VOlTAGE 25 50 Temperature FIGURE 75 -°C 8 tOata at high and low temperatures are applicable to ICL7652 only within its noted operating free-air temperature range of 0°C to 70°C. The extended data have been retained to show typical performance of devices selected from the same process but characterized for operation from -55°C to 125°C. 7 INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 75265 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER CHOPPER-STABILIZED TYPICAL CHARACTERISTICSt LARGE-SIGNAL DIFFERENTIAL VOL TAG E AMPLIFICATION and PHASE SHIFT vs FREQUENCY LARGE-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION vs FREE-AIR TEMPERATURE -75 -50 -25 0 T A -Free-Air 25 FIGURE SUPPl y CURRENT vs SUPPlY VOlTAGE 50 Temperature 75 -°C 10 SUPPL y CURRENT vs FREE-AIR TEMPERATURE 2 1.6 1.6 « E I E ~ ~ u > Q. c. ~ (/) < E I 'E ~ ~ c.> 1.2 1.2 :3?:' c. c. 0.8 ~ U> I C C 0.8 I C C " 0.4 0... 0 0 2 3 4 IVDD:t I -Supply FIGURE 5 6 Voltage -V 7 8 -75 -50 -25 0 T A -Free-Air 11 25 50 Temperature FIGURE 75 100 125 -oC 12 tOata at high and low temperatures are applicable to ICL7652 only within its noted operating free-air temperature range of 0°C to 70°C. The extended data have been retained to show typical performance of devices selected from the same process but characterized for operation from -55°C to 125°C. 8 TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 75265 Advanced TYPICAL LinCMOSTM ICL7652 PRECISION CHOPPER-STABILIZED OPERATIONAL AMPLIFIER CHARACTERISTICSt SHORT -CIRCUIT OUTPUT CURRENT vs SUPPlY VOlTAGE SHORT -CIRCUIT OUTPUT CURRENT vs FREE-AIR TEMPERATURE -75 -50 -25 0 T A -Free-Air 25 FIGURE SLEW FREE-AIR 50 Temperature 75 -°C 14 RA TE vs TEMPERATURE 1/1 :i> I Q) "iV ~ ~ Q) U; I ~ cn In ='. > I GI ~ I]: ~ GI Ui I I]: (/) -75 IVoo:t I -Supply FIGURE -50 Voltage -V -25 0 T A -Free-Air 15 25 50 Temperature FIGURE 75 -°C 16 tOata at high and low temperatures are applicable to ICL7652 only within its noted operating free-air temperature range of 0°C to 70°C. The extended data have been retained to show typical performance of devices selected from the same process but characterized for operation from -55°C to 125°C. TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 9 75265 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER CHOPPER-STABILIZED TYPICAL CHARACTERISTICSt 10 15 t -Time FIGURE GAIN-BANDWIDTH PRODUCT GAIN-BANDWIDTH vs SUPPLY 20 25 30 35 40 -I1s 18 PRODUCT vs FREE-AIR VOLTAGE TEMPERATURE 2.4 N :I: ~ I 2.2 "i3 ~ "0 O 11: .c '6 .~ "0 c ca m c:: 'ca " 1.8 1.6 1.4 1.2 L--75 IVDD:t I -Supply FIGURE Voltage -50 -25 0 T A -Free-Air -V 25 FIGURE 19 50 Temperature 75 100 125 -°C 20 tOata at high and low temperatures are applicable to ICL7652 only within its noted operating free-air temperature range of 0°C to 70°C. The extended data have been retained to show typical performance of devices selected from the same process but characterized for operation from -55°C to 125°C. 10 TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 75265 ICl7652 Advanced linCMOSTM PRECISION CHOPPER-STABiliZED OPERATIONALAMPLIFIER TYPICAL EQUIVALENT CHARACTERISTICSt INPUT NOISE VOLTAGE PHASE vs FREQUENCY SUPPLY 100 MARGIN vs VOLTAGE 50° RL = 10kO ~ > c I QJ C) ~ 0 > QJ cn .0 z 5 c. E. c QJ m .~ ~ C" w I CL = 100 pF ~ 80 1; '51 ~ 60 TA = 25°C 48° ~ ~ Qj UI (0 -1: 0. I 40 46° 44° E ~ I 20 1111111 VDD:t 42° = :t5V AS = 100Q C TA = 25°C > 40° 0 1 k 0 1 2 3 IVDD:!: PHASE FREE-AIR MARGIN vs TEMPERATURE 4 6 5 I -Supply V ~" FIGURE 22 7 PHASE LOAD 50° MARGIN vs CAPACITANCE 60° VDD:t ] 48° ~ = :t5V RL = 10kQ 50° T .= C) ~ ~ Q) (/) tU .c 0. I 8 v 46° .~ 0) ~ ~ Q) (/) TA = 25°C 40° 30° (V .c 0. 44° I E E 20° ~ 42° VDD:t = ..t5 V 10° RL = 10kQ GL = 100 pF 40° 00 75 50 -25 TA - 125 0 200 CL 400 600 Load Capacitance FIG URE 800 1000 -pF 24 11 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER CHOPPER-STABILIZED TYPICAL capacitor selection APPLICATION DATA and placement The two important factors to consider when selecting external capacitors CXA and CXB are leakage and dielectric absorption. Both factors can cause system degradation that negate the performance advantages realized by using the ICL7652. Degradation from capacitor leakage becomes more apparent with increasing temperatures. Low-leakage capacitors and standoffs are recommended for operation at T A = 125°C. In addition, guardbands around the capacitor connections on both sides of the printed circuit board are recommended to alleviate problems caused by surface leakage on circuit boards. Capacitors with high dielectric absorption tend to take several seconds to settle upon application of power, which directly affects input offset voltage. In applications needing fast settling of input offset voltage, it is recommended that high-quality film capacitors, such as mylar, polystyrene, or polypropylene, be used. In other applications, however, a ceramic or other low-grade capacitor may suffice. Unlike many choppers available today, the ICL7652 is designed to function with values of CXA and CXB in the range of 0.1 ~F to 1 ~F without degradation to input offset voltage or input noise voltage. These capacitors should be located as close as possible to the CXA and CXB pins and returned to either the VDD- pin or the C RETURN pin. Note that on many choppers, connecting these capacitors to the VDD- pin causes degradation in noise performance, a problem that is eliminated on the ICL7652. overload recovery/output clamp When large differential input voltage conditions are applied to the ICL7652, the nulling loop attempts to prevent the output from saturating by driving CXA and CXB to internally-clamped voltage levels. Once the overdrive condition is removed, a period of time is required to allow the built-up charge to dissipate. This time period is defined as overload recovery time (see Figure 25). Typical overload recovery time for the ICL7652 is significantly faster than that of competitive products. thermoelectric effects T o take advantage of the extremely low offset voltage temperature coefficient of the ICL7652, care must be taken to compensate for the thermoelectric effects present when two dissimilar metals are brought into contact with each other (such as device leads being soldered to a printed circuit board). It is not uncommon for dissimilar metal junctions to produce thermoelectric voltages in the range of several microvolts per degree Celsius (orders of magnitude greater than the O.O1-!lV/OC typical of the ICL7652). To help minimize thermoelectric effects, careful attention should be paid to component selection and circuit board layout. Avoid the use of nonsoldered connections (such as sockets, relays, switches, etc.) in the input signal path. Cancel thermoelectric effects by duplicating the number of components and junctions in each device input. The use of low-thermoelectriccoefficient components, such as wire-wound resistors, is also beneficial. 12 FIGURE TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS. TEXAS 75265 25. OVERLOAD RECOVERY Advanced TYPICAL avoiding ICL7652 PRECISION CHOPPER-STABILIZED OPERATIONAL AMPLIFIER LinCMOSTM APPLICATION DATA latchup The ICL7652 inputs and output are designed to withstand -1 OO-mA surge currents without sustaining latchup. However, because CMOS devices are susceptible to latchup due to their inherent parasitic thyristors, techniques to reduce the chance of latchup should be used whenever possible. Internal protection diodes should not be forward biased in normal operation. Applied input and output voltages should not exceed the supply voltage by more than 300 mV. Care should be exercised when using capacitive coupling on pulse generators. Supply transients should be shunted by using decoupling capacitors (0.1 ~F typical) located across the supply rails as close to the device as possible. The current path established if latchup occurs is usually between the supply rails and is limited only by the impedance of the power supply and the forward resistance of the parasitic thyristor. The chance of latchup occurring increases with increasing temperature and supply voltage. electrostatic discharge protection The ICL7652 incorporates internal ESD protection circuits that prevent functional failures at voltages at or below 2000 V. Care should be exercised in handling these devices, as exposure to ESD may result in degradation theory of the device parametric performance. of operation Chopper-stabilized operational amplifiers offer the best dc performance of any monolithic operational amplifier. This superior performance is the result of using two operational amplifiers -a main amplifier and a nulling amplifier- plus oscillator-controlled logic and two external capacitors to create a system that behaves as a single amplifier. With this approach, the ICL7652 achieves submicrovolt input offset voltage, submicrovolt noise voltage, and offset voltage variations with temperature in the nV/OC range. The ICL7652 on-chip control logic produces two dominant clock phases -a nulling phase and an amplifying phase. The term "chopper-stabilized" derives from the process of switching between these two clock phases. Figure 26 shows a simplified block diagram of the ICL7652. Switches A and B are make-before-break types. During the nulling phase, switch A is closed, shorting the nulling amplifier inputs together and allowing the nulling amplifier to reduce its own input offset voltage by feeding its output signal back to an inverting input node. Simultaneously, external capacitor CXA stores the nulling potential to allow the offset voltage of the amplifier to remain nulled during the amplifying phase. During the amplifying phase, switch B is closed, connecting the output of the nulling amplifier to a noninverting input of the main amplifier. In this configuration, the input offset voltage of the main MAIN IN + , IN - -;r>- Vo B amplifier is nulled. Also, external capacitor CXB stores the nulling potential to allow the offset voltage of the main amplifier to remain nulled during the next nulling phase. D A " ~ >-- ~~ VOO- 1::;(" This continuous chopping process allows offsetvoltage nulling during variations in time and temperature and over the common-mode input voltage range and power supply range. In NULL ~~ FIGURE 26. SIMPLIFIED . BLOCK DIAGRAM addition, because the low-frequency signal path is through both the null and main amplifiers, extremely high gain is achieved. TEXAS . INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 13 75265 ICL7652 Advanced LinCMOSTM PRECISION OPERATIONAL AMPLIFIER CHOPPER-STABILIZED TYPICAL APPLICA TION DA T A The low-frequency noise of a chopper amplifier depends on the magnitude of the component noise prior to chopping and the capability of the circuit to reduce this noise while chopping. The use of the Advanced linCMOSTM process, with its low-noise analog MOS transistors and patent-pending input stage design, significantly reduces the input noise voltage. The primary source of nonideal operation in chopper-stabilized amplifiers is error charge from the switches. As charge imbalance accumulates on critical nodes, input offset voltage can increase, especially with increasing chopping frequency. This problem has been significantly reduced in the ICl7652 by use of a patent-pending compensation circuit and the Advanced linCMOSTM process. The ICl7652 incorporates a feed-forward design that ensures continuous frequency response. Essentially, the gain magnitude of the nulling amplifier and compensation network crosses unity at the break frequency of the main amplifier. As a result, the high-frequency response of the system is the same as the frequency response of the main amplifier. This approach also ensures that the slewing characteristics remain the same during both the nulling and amplifying phases. temperature coefficient of input offset voltage Figure 27 shows the effects of package-induced thermal EMF. The ICL7652 can null only the offset voltage within its nulling loop. There are metal-to-metal junctions outside the nulling loop (bonding wires, solder joints, etc.) that produce EMF. In Figure 27, an ICL7652 was placed in an oven at 25°C at t = 0, biased up, and allowed to stabilize. At t = 3 min, the oven was turned on and allowed to rise in temperature to 125°C. As evidenced by the curve, the overall change in input offset voltage with temperature is much less than the specified maximum limit of 0.05 !lV/OC. 0.1 ~F -1t50kQ -'\/v'v10 0.1 ~F ~ 5Y 1+ -5Y t VIO = VO/1000 YO 50 kQ + FIGURE 27. EFFECTS OF PACKAGE-INDUCED 14 TEXAS ~ INSTRUMENTS POST OFFICE BOX 655303 .DALLAS, TEXAS 75265 THERMAL EMF PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) ICL7652P ACTIVE PDIP P 8 50 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 ICL7652P (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of