Agamem Microelectronics Inc. AA88348AP PRELIMINARY FEATURE z z z z z z z z z 12 bits serial data input(3 wire serial data 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. 10 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 Single +5 V system power supply Pin Assignment (Top View) VSS 1 16 GND AO2 2 15 AO1 AO3 3 14 DI AO4 4 13 CLK AO5 5 12 LD AO6 6 11 DO AO7 7 10 AO8 VDD 8 9 VCC AA88348AP 8-BIT DAC DESCRIPTION The AA88348AP is a CMOS processed digital to analog converter (DAC) with 8-bit reso- lotion, low leakage current and low operating current. The AA88348AP 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. Digital data (DI) input serially in a max. 10 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. 20μs settling time. 1 AA88348AP is a single 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, AA88348AP 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 AA88348AP. Its operational temper- nature range is specified over –20℃ to 85℃. 2006/7/5 Agamem Microelectronics Inc. AA88348AP PRELIMINARY 8-BIT DAC PIN DESCRIPTION Symbol Pin No. Type Name & Function VCC 9 － +5V system power supply pin GND 16 － System ground pin VDD 8 － Analog power supply pin VSS 1 － Analog ground pin CLK 13 I LD 12 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 8-bit of the 12-bit in the Shift-Register be latched into the Address Decoder and the Data-Latch, respectively DI 14 I Serial Digital Data input pin DO 11 O Serial Digital Data output pin. Output from the 12th data in the Shift-Register 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 AO6 6 O AO7 7 O AO8 10 O . . Data Input/Output DAC Output 2 to VDD 2006/7/5 AA88348AP Agamem Microelectronics Inc. PRELIMINARY 8-BIT DAC BLOCK DIAGRAM Digital Block (Clock) (Serial CLK DI D0 D1 D2 D3 12-bit Shift Register D4 D5 D6 D7 D8 D9 D10 DO D11 digital output) digital input) 4 LD 4-bit Address Decoder 1 2 3 4 (System VCC (Strobe) 6 7 8 8 8 8-bit Data Latch #8 8-bit Data Latch #8 8 8 GND (System Power) Ground) R-2R D/A Converter #1 (Analog (Serial VDD Power) Analog Output Analog Block D/A Converter #8 VSS (Anaglog OP-B #8 OP-B #1 AO1 Ground) AO8 * 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 3 2006/7/5 Agamem Microelectronics Inc. PRELIMINARY Cascade AA88348AP 8-BIT DAC Connection DI Vcc VDD CLK MCU LD DO DI AA88348AP GND Vcc Vss VDD CLK LD DO DI CLK AA88348AP GND Vcc Vss VDD AA88348AP LD DO GND Vss * VDD and VSS of each AA88348AP could be different depend on the application consideration 4 2006/7/5 AA88348AP Agamem Microelectronics Inc. PRELIMINARY Data 8-BIT DAC Input Format CLK MSB DI D11 LSB D10 D9 D2 D1 D0 LD Past Data AO1~8 Data Format in Shift New Data Register LSB MSB D0 D 1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 DI Data Address 8 4 To Address Decoder To Data Latch Data DO Conversion Data DAC Output Level D7 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 1 0 VDD - LSB 1 1 1 1 1 1 1 1 VDD * LSB = (VDD-VSS)/255 5 2006/7/5 AA88348AP Agamem Microelectronics Inc. PRELIMINARY Channel Address 1H 2H 3H 4H 5H 6H 7H 8H 8-BIT DAC Map OP-B #1 OP-B #2 OP-B #3 OP-B #4 OP-B #5 OP-B #6 OP-B #7 OP-B #8 R-2R D/A #1 R-2R D/A #2 R-2R D/A#3 R-2R D/A#4 R-2R D/A#5 R-2R D/A#6 R-2R D/A#7 R-2R D/A#8 D-L #1 D-L #2 D-L #3 D-L #4 D-L #5 D-L #6 D-L #7 D-L #8 AO1 AO2 AO3 AO4 AO5 AO6 AO7 AO8 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 Reserve 6 2006/7/5 Agamem Microelectronics Inc. AA88348AP PRELIMINARY 8-BIT DAC ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS (See NOTE) Parameter Rating Symbol Unit Min Typ Max System Voltage VCC -0.3 － +7.0 V Analog Voltage VDD -0.3 － +7.0 V Input Voltage VIN -0.3 － VCC + 0.3 V VOUT -0.3 － VCC + 0.3 V PD － － 250 mW Ta -20 － +85 ℃ TS -55 － +150 ℃ Output Voltage Power Dissipation Operating Ambient Condition Ta = +25℃ GND = 0V VDD≦VCC, Ta = +25℃ GND = 0V Temperature Storage Temperature 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 Rating Symbol Unit Min Typ Max VCC 4.5 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 － － +1.0 μF Ta -20 － +85 ℃ 7 Condition VCC ≧ VDD, VDD – VSS ≧ 2.0V Vss ≧ GND VAO shift≦0.3V 2006/7/5 Agamem Microelectronics Inc. AA88348AP PRELIMINARY 8-BIT DAC DC CHARACTERISTICS Digital Block Ta = 25℃ Parameter Value Symbol Unit Min Typ Max Condition System Voltage VCC 4.5 5.0 5.5 System Current ICC － 1.2 2.5 mA CLK = 1 MHz, No load; Input Leakage Current IILK -5 － +5 μA VIN = 0V / 5V 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 Analog V Block Ta = 25℃ Parameter Value Symbol Unit Condition Min Typ Max IDD － 0.7 1.0 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) Analog Output Sink Range VAOH VDD – 0.3 VDD VDD + 0.3 V IAOH = –1mA VAOL VSS – 0.1 VSS VSS + 0.1 V IAOL = 0μA (VCC=VDD=5V, VAOL VSS – 0.2 VSS VSS + 0.2 V IAOL = 500μA VSS=GND=0V, Data=#00) Resolution (AOx) Integral Non-Linearity VAOL VSS – 0.3 VSS VSS + 0.3 V IAOL = 1mA Res － 8 － bit INL -1.5 － +2 Differential Non-Linearity DNL -0.5 0 +3.5 Analog Current Analog Voltage mA No load VDD –VSS ≧ 2V VCC =5.5V, GND=0V LSB VDD=4.775V, VSS=0.95 LSB = 15mv, no load LSB 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. 8 2006/7/5 Agamem Microelectronics Inc. AA88348AP PRELIMINARY 8-BIT DAC AC CHARACTERISTICS Parameter Value Symbol Unit Min Typ Max ns Condition Clock Rate TCR 100 － － ns Load Strobe Pulse Width TLDP 50 － － ns Analog Output Settling Time TAOS － － 20 μs *RAL = 10 kΩ, CAL = 50pF (#00--> #FF) Digital Output Delay Time TDDO － － 200 ns **CL = 100 pF (Max.) AC Test • Condition Analog Output Settling Time Device Under Test Timing • Test Point Device Under Test Test Point CL** Chart 0.8．Vcc CLK Digital Output Delay Time CAL* RAL* Ta = 25℃ 0.2．Vcc 0.2．Vcc TCR TLDP 0.8．Vcc LD TAOS AOx 0.8．Vcc Past Data 0.2．Vcc New Data TDDO DO Past Data 0.8 ．Vcc 0.2 ．Vcc 9 New Data 2006/7/5 Agamem Microelectronics Inc. AA88348AP PRELIMINARY 8-BIT DAC TSSOP PACKAGE SYMBOLS DIMENSION 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 1.00 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 ㎜ (4 mil) unless otherwise specified 3. Coplanarity:0.1 ㎜ 4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact 5. Followed from jedec mo-153 10 2006/7/5