PRELIMINARY DATASHEET SHEET D LND1114 Programmable Fourteen (14) Channel High Voltage Precision Voltage Reference GENERAL DESCRIPTION The LND1114-1, -2, -3 are the smallest fourteen (14) channel voltage references available. The LND1114-1, -2, -3 combine extremely high accuracy with high voltage capability. Each reference voltage may be independently programmed or factory pre-set to any voltage from 100mV to 9V. The LND1114-1 offers 5mV accuracy, the LND1114-2 offers 1mV accuracy, LND1114-3 offers 0.5mV accuracy. The LND1114 uses Linear Dimensions proprietary floating gate technology to produce a flat response over temperature, eliminating the curved temperature profile normally associated with bandgap based silicon references and dramatically improves accuracy. The technology has been proven to maintain a +/-2% worst case accuracy over 10 years at 70C. FEATURES Fourteen (14) Precision Voltage References Wide Input Voltage Range: 2.7V to 12V Each Voltage Reference May be Independently Programmed from 0.1V to 9V Available Pre-Programmed Quiescent Current: 39uA/Channel Buffered Outputs: +/-1.5mA Per Channel High Precision: Eliminates Silicon Bandgap Curvature Initial Accuracy of 5mV, 1mV or 0.5mV (LND1114-1, LND1114-2, LND1114-3) Super Flat Response +/-2% Variation @ 70C Over 10 Years Super Small 2.2x3mm QFN Package PINOUT The LND1114 can be operated from an input voltage of 2.7V to 12V. The LND1114 draws only 39uA/channel and can drive up to +/1.5mA from each reference output. The LND1114 is packaged in a compact 2.2x3mm, 18 lead QFN package. BLOCK DIAGRAM APPLICATIONS Instrumentation Precision DAC Replacement Sensor Calibration Transceivers & Interfaces Optical Laser Drivers Precision Portable Instrumentation TV Gamma Correction Linear Dimensions Semiconductor Inc. 3031 Tisch Way, San Jose, CA 95128 USA tel (408) 914-2742 www.lineardimensions.com ABSOLUTE MAXIMUM RATINGS Over operating free-air temperature range unless otherwise specified (1) PARAMETER Max Unit 13 V Programming Supply VPP 14 V Maximum Junction Temperature, TJ 150 ºC -65 to 150 ºC Analog Supply, AVDD (2) Storage Temperature, TSTG • 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 under “recommended operating conditions” is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. • All voltage values are with respect to VSS. DISSIPATION RATING TABLE PACKAGE TYPE PACKAGE DESIGNATOR ΘJA QFN 18 Q 59ºC/W RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Typ Max Units o TA Operating Free air Temperature -5 85 C AVDD Analog Supply Voltage (2) 2.7 12 V VPP Programming Supply Voltage (2) 9 14 V ELECTRICAL CHARACTERISTICS Operating temperature range -5 to 85ºC, VPP = 9V to 14V, AVDD = 9V unless otherwise specified. SUPPLIES Symbol Parameter Test Condition Min Typ Max Units IAVDD Analog Supply Current AVDD = 3.3V 545 uA IAVDD Analog Supply Current AVDD = 5.0V 600 uA IAVDD Analog Supply Current AVDD = 9V 650 uA ANALOG CHARACTERISTICS Symbol Parameter VPROG Voltage Operating Range VPROG VREF Programming Precision Test Condition Min Typ 2.7 LD1114-1 ±5 Max Units 9 V mV Linear Dimensions Semiconductor Inc. 3031 Tisch Way, San Jose, CA 95128 USA tel (408) 914-2742 www.lineardimensions.com VPROG VREF Programming Precision LD1114-2 ±1 mV VPROG VREF Programming Precision LD1114-3 ±0.5 mV OLDRIFT Operating Life VREF Drift 10 Years @ 70ºC, Vo=5V -0.2 +0.2 % IOUT Current Per VREF Output AVDD = 5.0V -1.5 +1.5 mA VOL VREF1 & VREF2 Output Swing Low I Sink 50 uA VSS+0.1 VOH VREF13 & VREF14 Output Swing High I source 50 uA V AVDD-0.1 V +0.1 % VTEMP Output voltage Variation with temperature PSRR Power Supply Rejection Ratio VREF for temperature from -5 to 85 deg. C -0.2 VREF for 6V AVDD 9V 45 60 dB Digital OPERATING CHARACTERISTICS Symbol Parameter VIL SDA, Input Low Voltage VIH SDA, Input High Voltage VOL SDA, Low voltage Output Test Condition Min Typ Max Units VCCx.20 V VCCx.80 V 2 V Note: Detailed programming information is available from Linear Dimensions in the LND1114 Addendum. Serial Interface Timing Diagram (Over recommended operating conditions, unless otherwise noted. All voltages are relative to VSS.) Symbol Description Min. Max. Units fSCL SCL Clock Frequency tLOW Clock Low Period 4.7 s tHIGH Clock High Period 4.0 s tBUF Bus Free Time 4.7 s Start Condition Setup Time 4.7 s tSU:STA 0 Typ. 100 KHz Linear Dimensions Semiconductor Inc. 3031 Tisch Way, San Jose, CA 95128 USA tel (408) 914-2742 www.lineardimensions.com tHD:STA Start Condition Hold Time 4.0 s tSU:STO Stop Condition Setup Time 4.7 s tAA Clock Edge to Data Valid 0.1 tDH Data Output Hold Time 100 tR SCL and SDA Rise Time 1 s tF SCL and SDA Fall Time 300 nsec s 4.5 nsec tSU:DAT Data In Setup Time 200 nsec tHD:DAT Data In Hold Time 0 nsec TI Noise Filter SCL and SDA 100 nsec FUNCTIONAL DESCRIPTION The LND1114 is a programmable voltage reference device. The LND1114 has 14 voltage reference outputs (VREF1-VREF14). Each voltage is programmed as a difference between two analog nonvolatile memory cells. Storing the voltage in a pseudo-differential manner provides excellent temperature stability as well as supply rejection. SDA/ AOUT is a dual function Pin. SDA is the serial data input pin used to input instructions and data into the LND1114. AOUT is an un-buffered analog output that reflects the VREF voltage of the output being programmed. SCL/VPP is a dual function pin. SCL is the serial clock that is used to clock data into or out of the device on the Serial Data line. VPP is a high voltage input which is used top program gamma voltages to their desired values. VOLTAGE PROGRAMMING Programming the voltage reference voltages is generally done utilizing the AP100 programmer, however, in circuit programming is also possible. Programming of the references utilizes the SDA pin as a command/data input, used to select the function to perform and to select the gamma output (VREF1 – VREF14) to be programmed. The SDA pin also outputs the actual voltage on the output pin of the reference voltage being programmed. The SCL/VPP input provides the clock for inputting data and the programming voltage for the non-volatile analog storage cells. Programming details are available from Linear Dimensions for those wishing to perform in circuit programming, however, factory presets are recommended and can be defined during the ordering process. Linear Dimensions Semiconductor Inc. 3031 Tisch Way, San Jose, CA 95128 USA tel (408) 914-2742 www.lineardimensions.com PACKAGE The LND1114 is packaged in a 2.2x3mm TQFN package offering minimal footprint and headroom for size challenged applications. It is the only fourteen (14) channel voltage reference in such a small package. Linear Dimensions Semiconductor Inc. 3031 Tisch Way, San Jose, CA 95128 USA tel (408) 914-2742 www.lineardimensions.com PINOUT INPUT / OUTPUT FUNCTION DESCRIPTION Name Description VSS Ground AVDD Analog Supply Value Range Function Ground for both analog and digital circuitry 2.7V-12V Analog Input Voltage VSS+0.1 VREF1VREF14 Analog Outputs to Voltage references AVDD-0.1 Serial data interface used programming of the LND1114 SDA/Aout during the Serial I/O VIL to VIH Programming: During voltage reference programming, the AOUT signal provides a closed loop measurement of the voltage reference voltage being programmed. Serial clock Input VIL to VIH Serial clock interface used programming of the LND1114 SCL/VPP Programming Voltage 9V to 14V during the Programming: Input for VPP pulses for adjusting the VREF output values and VPP for Programming memory cells. Linear Dimensions Semiconductor Inc. 3031 Tisch Way, San Jose, CA 95128 USA tel (408) 914-2742 www.lineardimensions.com