Ai88347 8-BIT DAC Feature Description ♦ 12 bits serial data input(3 wire serial data The Ai88347 is a CMOS processed digital to analog converter (DAC) with 8-bit resolution, low leakage current and low operating current. The Ai88347 has 8 channels with build in operational amplifier output buffers which could operate in the full-swing voltage range from VCC to GND and enhance the Drive/Sink ability up to max.1mA. transfer method, DI, CLK, LD) ♦ R-2R resistor ladder used for D/A conversion ♦ 8 channels with 8-bit resolution monotonic D/A converted ♦ 8 channel buffer operational amplifiers operating in the full voltage range from VCC to GND only if VDD=VCC and VSS=GND ♦Max. 2.5 MHz serial digital data input ♦ Serial I/O for cascade application ♦ Max. 1.0 mA output drive/sink current ♦ Two separate power supply/ground lines for system and analog power supply ♦ Dual 3.3/5V system power supply Pin Assignment (Top View) Digital data (DI) input serially in a max. 2.5 MHz clock (CLK) rate. The latched 12-bit digital data is converted into an analog DC voltage in the range from VSS to VDD with 8-bit resolution in one of the eight channels by the D/A converter in a max. 100μs settling time. Dual 3.3V/5V power DAC. Analog DC output could be full voltage swing as the analog power is equal to the system power. In addition to normal D/A converter applications, Ai88347 is also available for electronic volume and instead of potentiometers for adjustment due to its high stability on the capacitive load. . 16 pins TSSOP package type are available for Ai88347. Its operational temperature range is specified over –20℃ to 85℃. P1/12 April 2008 Ai88347 8-BIT DAC Pin Description Symbol Pin No. Type Name & Function VCC 9 - 3.3V/5V system power supply pin GND 16 - System ground pin VDD 8 - Analog power supply pin VSS 1 - Analog ground pin CLK 13 I Serial clock input pin. At its rising edge, DI data shift into the Shift-Register. Data Strobe pin. When it’s on high, upper 4-bit and lower LD 12 I 8-bit of the 12-bit in the Shift-Register be latched into the Address Decoder and the Data-Latch, respectively Data Input/Output D1 14 I DO 11 O Serial Digital Data input pin Serial Digital Data output pin. Output from the 12th data in the Shift-Register DAC Output AO1 15 O AO2 2 O AO3 3 O AO4 4 O 8-bit D/A converter outputs AO5 5 O Output range is from VSS to VDD AO6 6 O AO7 7 O AO8 10 O P2/12 April 2008 Ai88347 8-BIT DAC Block Diagram * Vcc and GND are for digital block and operational amplifier buffer block * VDD, VSS are only for Analog block except operational amplifier buffer block * Vss + 2V ≦ VDD ≦ Vcc * GND ≦ Vss ≦ VDD – 2V P3/12 April 2008 Ai88347 8-BIT DAC Cascade Connection * VDD and VSS of each Ai88347 could be different depend on the application consideration P4/12 April 2008 Ai88347 8-BIT DAC Data Input Format Data Format in Shipt Register Data Conversion Data D7 DAC Output Level D6 D5 D4 D3 D2 D1 D0 AOx 0 0 0 0 0 0 0 0 Vss 0 0 0 0 0 0 0 1 Vss + LSB* 0 0 0 0 0 0 1 0 Vss + 2*LSB ...…...... ...…...... ...…...... ...…...... ...…...... ...…...... ...…...... 1 1 1 1 1 1 0 VDD – 2*LSB 1 1 1 1 1 1 1 1 VDD – LSB ...…..... ...…...... 1 *LSB=(VDD – VSS)/255 P5/12 April 2008 Ai88347 8-BIT DAC Channel Map Address Decoding Address Data Latch Selected D8 D9 D10 D11 0 0 0 0 NA 0 0 0 1 Data Latch #1 0 0 1 0 Data Latch #2 0 0 1 1 Data Latch #3 0 1 0 0 Data Latch #4 0 1 0 1 Data Latch #5 0 1 1 0 Data Latch #6 0 1 1 1 Data Latch #7 1 0 0 0 Data Latch #8 1 0 0 1 NA 1 0 1 0 NA 1 0 1 1 NA 1 1 0 0 NA 1 1 0 1 NA 1 1 1 0 NA 1 1 1 1 NA P6/12 April 2008 Ai88347 8-BIT DAC Electrical Characteristics Absolute Maximum Rating (See Note) Parameter Symbol Rating Min Typ Max Unit Condition System Voltage VCC –0.3 - +7.0 V Analog Voltage VDD –0.3 - +7.0 V Ta = +25 GND = 0V VDD VCC, Input Voltage VIN –0.3 - VCC + 0.3 V Ta = +25 VOUT –0.3 - VCC + 0.3 V GND = 0V Power Dissipation PD - - 250 mW Operating Ambient Temperature Ta –20 - +85 °C Storage Temperature TS –55 - +150 °C Output Voltage NOTE: Stress above those listed under “Absolute Maximum Rating” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for the extended periods of time may affect device reliability. Recommended Operating Conditions Parameter System Voltage Analog Voltage Analog Output Current Analog Output Load Capacitance for Oscillation limit Operating Ambient Temperature Symbol Rating Unit Min Typ Max Vcc 2.7 5.0 5.5 V GND - 0 - V VDD 2.0 - Vcc V VSS GND - Vcc – 2.0 V IAO –1.0 - +1.0 mA COL - - 200p pF Ta –20 - +85 °C P7/12 Condition VCC VDD, VDD – VSS Vss 2.0V GND VAO shift 0.3V April 2008 Ai88347 8-BIT DAC DC Characteristics (System Voltage, Vcc = 3.3V) Digital Block Ta=25°C Parameter Rating Symbol Min Typ Max Unit Condition System Voltage VCC 2.7 3.0 3.6 V System Current ICC - 1 3 mA Input Leakage Current IILK –5 - +5 µA Digital Input Low Voltage VIL - - 0.2 * Vcc V Digital Input High Voltage VIH 0.8 * Vcc - - V Digital Output Low VOL - - 0.4 V IOL = +2.5 mA Digital Output High VOH Vcc – 0.4 - - V IOH = –400µA CLK = 1 MHz, No load; VIN = 0V / 3V Analog Block Ta=25°C Parameter Symbol Rating Unit Condition Min Typ Max IDD - 0.5 0.8 mA VDD 2.0 - Vcc V VSS GND - Vcc – 2.0 V Analog Output Drive Range VAOH VDD – 0.1 VDD VDD + 0.1 V IAOH = 0µA (VCC=VDD=3V, VAOH VDD – 0.2 VDD VDD + 0.2 V IAOH = –500µA VSS=GND=0V, Data=#FF) VAOH VDD – 0.3 VDD VDD + 0.3 V IAOH = –1mA Analog Output Sink Range VAOL Vss – 0.1 Vss Vss + 0.1 V IAOL = 0µA (Vcc= VDD =3V, VAOL Vss – 0.2 Vss Vss + 0.2 V IAOL = 500µA Vss=GND=0V, Data=#00) VAOL Vss – 0.3 Vss Vss + 0.3 V IAOL = 1mA Resolution (AOx) Res - 8 - bit Vcc =3.6V, GND=0V Integral Non-Linearity INL –3 - +3 LSB VDD=3.36V, VSS=0.3V Differential Non-Linearity DNL –1.0 0 +2.0 LSB LSB = 12mV, no load Analog Current Analog Voltage No load VDD –VSS 2V NOTES: Integral Non-Linearity : The difference between the digital data converted DC analog values and a reference straight line drawn through the first and the last output values Differential Non-Linearity : The difference between the ideal and real increment value of DC analog voltage when the digital data increase 1 bit. P8/12 April 2008 Ai88347 8-BIT DAC DC Characteristics (System Voltage, Vcc = 5V) Digital Block Ta=25°C Parameter Rating Symbol Min Typ Max Unit Condition System Voltage VCC 4.5 5.0 5.5 V System Current ICC - 1.2 2.5 mA Input Leakage Current IILK –5 - +5 µA Digital Input Low Voltage VIL - - 0.2 * Vcc V Digital Input High Voltage VIH 0.5 * Vcc - - V Digital Output Low VOL - - 0.4 V IOL = +2.5 mA Digital Output High VOH Vcc – 0.4 - - V IOH = –400µA CLK = 1 MHz, No load; VIN = 0V / 5V Analog Block Ta=25°C Parameter Symbol Rating Unit Condition Min Typ Max IDD - 0.7 1.0 mA VDD 2.0 - VCC V VSS GND - VCC – 2.0 V Analog Output Drive Range VAOH VDD – 0.1 VDD VDD + 0.1 V IAOH = 0µA (VCC=VDD=5V, VAOH VDD – 0.2 VDD VDD + 0.2 V IAOH = –500µA VSS=GND=0V, Data=#FF) VAOH VDD – 0.3 VDD VDD + 0.3 V IAOH = –1mA Analog Output Sink Range VAOL VDD – 0.1 VSS VSS + 0.1 V IAOL = 0µA (Vcc= VDD =5V, VAOL VDD – 0.2 VSS VSS + 0.2 V IAOL = 500µA Vss=GND=0V, Data=#00) VAOL VDD – 0.3 VSS VSS + 0.3 V IAOL = 1mA Resolution (AOx) Res - 8 - bit Vcc =5.5V, GND=0V Integral Non-Linearity INL –3.5 - +3.5 LSB VDD=4.775V, VSS=0.95 Differential Non-Linearity DNL –1.5 0 +2.5 LSB LSB = 15mV, no load Analog Current Analog Voltage No load VDD –VSS 2V NOTES: Integral Non-Linearity : The difference between the digital data converted DC analog values and a reference straight line drawn through the first and the last output values Differential Non-Linearity : The difference between the ideal and real increment value of DC analog voltage when the digital data increase 1 bit. P9/12 April 2008 Ai88347 8-BIT DAC AC Characteristics (System Voltage, Vcc = 3.3V) Parameter Symbol Ta=25°C Rating Min Typ Max Unit Clock Rate TCR 400 1000 - ns Load Strobe Pulse Width TLDP - 200 - ns Analog Output Settling Time TAOS - - 100 µS Digital Output Delay Time TDDO - - 170 ns AC Characteristics Condition *RAL = 10 kΩ, CAL = 50pF (#00 Æ #FF) **CL = 100 pF (Max.) (System Voltage, Vcc = 5V) Parameter Symbol Ta=25°C Rating Min Typ Max Unit Clock Rate TCR 400 1000 - ns Load Strobe Pulse Width TLDP - 200 - ns Analog Output Settling Time TAOS - - 100 µS Digital Output Delay Time TDDO - - 350 ns P10/12 Condition *RAL = 10 kΩ, CAL = 50pF (#00 Æ #FF) **CL = 100 pF (Max.) April 2008 Ai88347 8-BIT DAC AC Test Condition Timing Chart P11/12 April 2008 Ai88347 8-BIT DAC TSSOP Package Dimension Symbols Dimensions In Millimeters Dimensions In Inches Min Nom Max Min Nom Max A - - 1.20 - - 0.048 A1 0.05 - 0.15 0.002 - 0.006 A2 0.80 100 1.05 0.031 0.039 0.041 b 0.19 - 0.30 0.007 - 0.012 C 0.09 - 0.20 0.004 - 0.008 D 4.90 5.00 5.10 0.193 0.197 0.201 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 e - 0.65 - - 0.026 - L 0.45 0.60 0.75 0.018 0.024 0.030 y - - 0.10 - - 0.004 θ 0° - 8° 0° - 8° NOTES: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance ± 0.1 mm (4 mil) unless otherwise specified 3. Coplanarity:0.1 mm 4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact 5. Followed from jedec mo-153 P12/12 April 2008