LTC8043FS8#TRPBF

LTC8043 Serial 12-Bit Multiplying DAC in SO-8 U DESCRIPTION FEATURES ■ ■ ■ ■ ■ ■ ■ ■ The LTC®8043 is a serial-input 12-bit multiplying digitalto-analog converter (DAC). It is a superior pin compatible replacement for the DAC-8043. Improvements include better accuracy, better stability over temperature and supply variations, lower sensitivity to output amplifier offset, tighter timing specifications and lower output capacitance. Improved Direct Replacement for DAC-8043 and MAX543 SO-8 Package DNL and INL Over Temperature: ±0.5LSB Easy, Fast and Flexible Serial Interface ±1LSB Maximum Gain Error 4-Quadrant Multiplication Low Power Consumption Low Cost An easy-to-use 3-wire serial interface is well-suited to remote or isolated applications U APPLICATIONS ■ ■ ■ ■ ■ The LTC8043 is extremely versatile. It can be used for 2-quadrant and 4-quadrant multiplying, programmable gain and single supply applications, such as noninverting voltage output mode. Process Control and Industrial Automation Remote Microprocessor-Controlled Systems Digitally Controlled Filters and Power Supplies Programmable Gain Amplifiers Automatic Test Equipment Parts are available in 8-pin SO and PDIP packages and are specified over the extended industrial temperature range, – 40°C to 85°C. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATION Integral Nonlinearity Over Temperature SO-8 Multiplying DAC Has Easy 3-Wire Serial Interface 1.0 5V 8 CLOCK DATA LOAD 7 6 5 1 2 VDD VREF RFB 33pF CLK SRI LTC8043 LD IOUT 3 – ® LT 1097 GND 4 + VOUT INTEGRAL NONLINERARITY (LSB) VIN TA = 85°C 0.5 TA = 25°C 0 TA = –40°C –0.5 LTC8043 • TA01 –1.0 0 512 1024 1536 2048 2560 3072 3584 4095 DIGITAL INPUT CODE LTC8043 • TPC02 1 LTC8043 U W U U W W W ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION VDD to GND................................................. – 0.5V to 7V Digital Inputs to GND .................. – 0.5V to (VDD + 0.5V) VIOUT to GND ............................... – 0.5V to (VDD + 0.5V) VREF to GND.......................................................... ±25V VRFB to GND .......................................................... ±25V Maximum Junction Temperature .......................... 150°C Operating Temperature Range ............... – 40°C to 85°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C ORDER PART NUMBER TOP VIEW VREF 1 8 VDD RFB 2 7 CLK IOUT 3 6 SRI GND 4 5 LD N8 PACKAGE 8-LEAD PDIP LTC8043EN8 LTC8043FN8 LTC8043ES8 LTC8043FS8 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 130°C/ W (N8) TJMAX = 150°C, θJA = 190°C/ W (S8) Consult factory for Military grade parts. ACCURACY CHARACTERISTICS VDD = 5V, VREF = 10V, VIOUT = GND = 0V, TA = TMIN to TMAX, unless otherwise specified. SYMBOL PARAMETER INL DNL GE Resolution Integral Nonlinearity Differential Nonlinearity Gain Error ILKG Gain Temperature Coefficient (∆Gain/∆Temp) Output Leakage Current CONDITIONS MIN ● (Note 1) Guaranteed Monotonic, TMIN to TMAX (Note 2) TA = 25°C TMIN to TMAX (Note 3) (Note 4) TA = 25°C TMIN to TMAX TA = 25°C TMIN to TMAX Zero-Scale Error PSRR Power Supply Rejection Ratio VDD = 5V ±5% LTC8043E TYP MAX 12 LTC8043F TYP MAX 12 ● ● ● ● MIN 1 ±0.5 ±0.5 ±1 ±2 5 1 ±1 ±1 ±2 ±2 5 UNITS Bits LSB LSB LSB LSB ppm/°C ● ±5 ±25 ±0.03 ±0.15 ±5 ±25 ±0.03 ±0.15 nA nA LSB LSB ● ±0.0001 ±0.002 ±0.0001 ±0.002 %/% ● ELECTRICAL CHARACTERISTICS VDD = 5V, VREF = 10V, VIOUT = GND = 0V, TA = TMIN to TMAX, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN ALL GRADES TYP MAX UNITS Reference Input RREF VREF Input Resistance (Note 5) ● Output Current Settling Time (Notes 6, 7) Multiplying Feedthrough Error 7 11 15 kΩ ● 0.25 1 µs VREF = ±10V, 10kHz Sinewave ● 0.7 1 mVP-P Digital-to-Analog Glitch Energy (Notes 6, 8) ● 2 20 nVSEC Total Harmonic Distortion (Note 9) ● – 108 – 92 dB Output Noise Voltage Density (Note 10) ● 17 nV/√Hz DAC Register Loaded to All 1s ● 60 90 pF DAC Register Loaded to All 0s ● 30 60 pF AC Performance (Note 3) THD Analog Outputs (Note 3) COUT 2 Output Capacitance LTC8043 ELECTRICAL CHARACTERISTICS VDD = 5V, VREF = 10V, VIOUT = GND = 0V, TA = TMIN to TMAX, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN ALL GRADES TYP MAX UNITS Digital Inputs VIH Digital Input High Voltage ● VIL Digital Input Low Voltage ● IIN Digital Input Current VIN = 0V to VDD ● CIN Digital Input Capacitance VIN = 0V,(Note 3) ● 2.4 V 0.001 0.8 V ±1 µA 8 pF Timing Characteristics (Note 3) tDS Serial Input to Clock Setup Time ● 30 –5 ns tDH Serial Input to Clock Hold Time ● 60 25 ns tSRI Serial Input Data Pulse Width ● 80 ns tCH Clock Pulse Width High ● 80 ns tCL Clock Pulse Width Low ● 80 ns tLD Load Pulse Width ● 140 ns tASB LSB Clocked into Input Register to Load DAC Register Time ● 0 ns ● 4.75 Power Supply VDD Supply Voltage IDD Supply Current Digital Inputs = 0V or VDD Digital Inputs = VIH or VIN The ● denotes specifications which apply over the full operating temperature range. Note 1: ±0.5LSB = ±0.012% of full scale. Note 2: Using internal feedback resistor. Note 3: Guaranteed by design, not subject to test. Note 4: IOUT with DAC register loaded with all 0s. Note 5: Typical temperature coefficient is 100ppm/°C. Note 6: IOUT load = 100Ω in parallel with 13pF. ● ● 5 5.25 V 100 500 µA µA Note 7: To 0.01% for a full-scale change, measured from falling edge of LD. Note 8: VREF = 0V. DAC register contents changed from all 0s to all 1s or from all 1s to all 0s. Note 9: VREF = 6VRMS at 1kHz. DAC register loaded with all 1s. Note 10: 10Hz to 100kHz between RFB and IOUT. Calculation from en = √4KTRB where: K = Boltzmann constant (J/K°); R = resistance (Ω); T = resistor temperature (°K); B = bandwidth (Hz). W BLOCK DIAGRAM 20k 20k 20k VREF 1 2 RFB 40k 40k 40k 40k 40k 40k 40k 10k 3 IOUT VDD 8 4 GND DECODER BIT 1 (MSB) 5 LOAD CLK 7 CLK LD BIT 2 BIT 3 BIT 4 DAC REGISTER INPUT 12-BIT SHIFT REGISTER BIT 12 (LSB) IN 6 SRI 8043 BD Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 3 LTC8043 WU W TI I G DIAGRA tDH tDS tCL tCH CLK INPUT tSRI PREVIOUS WORD SRI BIT 1 MSB BIT 2 BIT 12 LSB BIT 11 tASB LD tLD 8043TD01 U TYPICAL APPLICATIONS N Unipolar Operation (2-Quadrant Multiplication) VREF –10V TO 10V 5V 0.1µF 7 µP 6 5 1 2 VDD VREF RFB 8 Table 1. Unipolar Binary Code Table 33pF CLK SRI – IOUT 3 LTC8043 LD + GND 4 VOUT LT1097 LTC8043 • TA03 DIGITAL INPUT BINARY NUMBER IN DAC REGISTER MSB LSB 1111 1111 1111 1000 0000 0000 0000 0000 0001 0000 0000 0000 ANALOG OUTPUT VOUT –VREF (4095/4096) –VREF (2048/4096) = –VREF/2 –VREF (1/4096) 0V Bipolar Operation (4-Quadrant Multiplication) 0.1µF 7 µP 6 5 8 1 VDD VREF 2 RFB LTC8043 Table 2. Bipolar Offset Binary Code Table 33pF CLK SRI R3 20k R2 20k VREF –10V TO 10V 5V IOUT 3 LD – R1 10k 1/2 LT1112 + GND 4 – 1/2 LT1112 VOUT + DIGITAL INPUT BINARY NUMBER IN DAC REGISTER MSB LSB 1111 1111 1111 1000 0000 0001 1000 0000 0000 0111 1111 1111 0000 0000 0000 ANALOG OUTPUT VOUT +VREF (2047/2048) +VREF (1/2048) 0V –VREF (1/2048) –VREF (2048/2048) = –VREF LTC8043 • TA04 RELATED PARTS PART NUMBER DESCRIPTION LTC1257 Complete Serial I/O VOUT 12-Bit DAC 5V to 15V Single Supply in 8-Pin SO and PDIP LTC1451/LTC1452/LTC1453 Complete Serial I/O VOUT 12-Bit DACs 3V/5V Single Supply in 8-Pin SO and PDIP LTC7541A Parallel I/O Multiplying 12-Bit DAC 12-Bit Wide Input LTC7543/LTC8143 Serial I/O Mulitplying 12-Bit DACs Clear Pin and Serial Data Output (LTC8143) 4 Linear Technology Corporation COMMENTS LT/GP 1195 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7487 (408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977  LINEAR TECHNOLOGY CORPORATION 1995