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AI88347
8-BIT DAC
Feature
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. 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)
Description
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. 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. 100s 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 VCC GND VDD VSS CLK Pin No. 9 16 8 1 13 Type I System ground pin Analog power supply pin Analog ground pin 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 DO 14 11 I O Serial Digital Data input pin Serial Digital Data output pin. Output from the 12th data in the Shift-Register DAC Output AO1 AO2 AO3 AO4 AO5 AO6 AO7 AO8 15 2 3 4 5 6 7 10 O O O O O O O O 8-bit D/A converter outputs Output range is from VSS to VDD Name & Function 3.3V/5V system power supply pin
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 0 0 0 ............ 1 1 D6 0 0 0 ............ 1 1 D5 0 0 0 ............ 1 1 D4 0 0 0 ............ 1 1 D3 0 0 0 ............ 1 1 D2 0 0 0 ............ 1 1 D1 0 0 1 ............ 1 1 D0 0 1 0 ............ 0 1 DAC Output Level AOx Vss Vss + LSB* Vss + 2*LSB ........... VDD - 2*LSB VDD - LSB
*LSB=(VDD - VSS)/255
P5/12 April 2008
AI88347
8-BIT DAC
Channel Map
Address Decoding
Address D8 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D9 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D10 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D11 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Data Latch Selected NA Data Latch #1 Data Latch #2 Data Latch #3 Data Latch #4 Data Latch #5 Data Latch #6 Data Latch #7 Data Latch #8 NA NA NA NA NA NA NA
P6/12
April 2008
AI88347
8-BIT DAC
Electrical Characteristics
Absolute Maximum Rating (See Note) Parameter System Voltage Analog Voltage
Input Voltage Output Voltage Power Dissipation Operating Ambient Temperature Storage Temperature
Symbol
VCC VDD VIN VOUT PD Ta TS
Rating
Min
Typ -
Max +7.0 +7.0 VCC + 0.3 VCC + 0.3 250 +85 +150
Unit
V V V V mW C C
Condition
Ta = +25 GND = 0V VDD VCC, Ta = +25 GND = 0V
-0.3 -0.3 -0.3 -0.3 -20 -55
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 Vcc GND
VDD VSS IAO
Rating Min 2.7 2.0 GND -1.0 -20 Typ 5.0 0 Max 5.5 Vcc Vcc - 2.0 +1.0 200p +85
Unit V V V V mA pF C VCC Vss
Condition VDD, 2.0V GND 0.3V
VDD - VSS
VAO shift
COL Ta
P7/12
April 2008
AI88347
8-BIT DAC
DC Characteristics (System Voltage, Vcc = 3.3V)
Digital Block Parameter System Voltage System Current Input Leakage Current Digital Input Low Voltage Digital Input High Voltage Digital Output Low Digital Output High Symbol VCC ICC IILK VIL VIH VOL VOH Rating Min 2.7 -5 0.8 * Vcc Vcc - 0.4 Typ 3.0 1 Max 3.6 3 +5 0.2 * Vcc 0.4 Unit V mA A V V V V IOL = +2.5 mA IOH = -400A CLK = 1 MHz, No load; VIN = 0V / 3V Ta=25C Condition
Analog Block Parameter Analog Current Analog Voltage Analog Output Drive Range (VCC=VDD=3V, VSS=GND=0V, Data=#FF) Analog Output Sink Range (Vcc= VDD =3V, Vss=GND=0V, Data=#00) Resolution (AOx) Integral Non-Linearity Differential Non-Linearity NOTES: Symbol IDD VDD VSS VAOH VAOH VAOH VAOL VAOL VAOL Res
INL DNL
Ta=25C Rating Min 2.0 GND VDD - 0.1 VDD - 0.2 VDD - 0.3 Vss - 0.1 Vss - 0.2 Vss - 0.3 -3 -1.0 Typ 0.5 VDD VDD VDD Vss Vss Vss 8 0 Max 0.8 Vcc Vcc - 2.0 VDD + 0.1 VDD + 0.2 VDD + 0.3 Vss + 0.1 Vss + 0.2 Vss + 0.3 +3 +2.0 Unit mA V V V V V V V V bit LSB LSB Condition No load VDD -VSS IAOH = 0A IAOH = -500A IAOH = -1mA IAOL = 0A IAOL = 500A IAOL = 1mA Vcc =3.6V, GND=0V VDD=3.36V, VSS=0.3V LSB = 12mV, no load 2V
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 Parameter System Voltage System Current Input Leakage Current Digital Input Low Voltage Digital Input High Voltage Digital Output Low Digital Output High Symbol VCC ICC IILK VIL VIH VOL VOH Rating Min 4.5 -5 0.5 * Vcc Vcc - 0.4 Typ 5.0 1.2 Max 5.5 2.5 +5 0.2 * Vcc 0.4 Unit V mA A V V V V IOL = +2.5 mA IOH = -400A CLK = 1 MHz, No load; VIN = 0V / 5V Ta=25C Condition
Analog Block Parameter Analog Current Analog Voltage Analog Output Drive Range (VCC=VDD=5V, VSS=GND=0V, Data=#FF) Analog Output Sink Range (Vcc= VDD =5V, Vss=GND=0V, Data=#00) Resolution (AOx) Integral Non-Linearity Differential Non-Linearity NOTES: Symbol IDD VDD VSS VAOH VAOH VAOH VAOL VAOL VAOL Res
INL DNL
Ta=25C Rating Min 2.0 GND VDD - 0.1 VDD - 0.2 VDD - 0.3 VDD - 0.1 VDD - 0.2 VDD - 0.3 -3.5 -1.5 Typ 0.7 VDD VDD VDD VSS VSS VSS 8 0 Max 1.0 VCC VCC - 2.0 VDD + 0.1 VDD + 0.2 VDD + 0.3 VSS + 0.1 VSS + 0.2 VSS + 0.3 +3.5 +2.5 Unit mA V V V V V V V V bit LSB LSB Condition No load VDD -VSS IAOH = 0A IAOH = -500A IAOH = -1mA IAOL = 0A IAOL = 500A IAOL = 1mA Vcc =5.5V, GND=0V VDD=4.775V, VSS=0.95 LSB = 15mV, no load 2V
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 Parameter Clock Rate
(System Voltage, Vcc = 3.3V) Symbol TCR TLDP TAOS TDDO Rating Min 400 Typ 1000 200 Max 100 170 Unit ns ns S ns
Ta=25C Condition
Load Strobe Pulse Width Analog Output Settling Time Digital Output Delay Time AC Characteristics Parameter Clock Rate Load Strobe Pulse Width Analog Output Settling Time Digital Output Delay Time
*RAL = 10 k, CAL = 50pF (#00 #FF) **CL = 100 pF (Max.) Ta=25C
(System Voltage, Vcc = 5V) Symbol TCR TLDP TAOS TDDO Rating Min 400 Typ 1000 200 Max 100 350 Unit ns ns S ns
Condition
*RAL = 10 k, CAL = 50pF (#00 #FF) **CL = 100 pF (Max.)
P10/12
April 2008
AI88347
8-BIT DAC AC Test Condition
Timing Chart
P11/12
April 2008
AI88347
8-BIT DAC
TSSOP Package Dimension
Symbols
A A1 A2 b C D E E1 e L y
Dimensions In Millimeters Min
0.05 0.80 0.19 0.09 4.90 6.20 4.30 0.45 0
Dimensions In Inches Min
0.002 0.031 0.007 0.004 0.193 0.244 0.169 0.018 0
Nom
100 5.00 6.40 4.40 0.65 0.60 -
Max
1.20 0.15 1.05 0.30 0.20 5.10 6.60 4.50 0.75 0.10 8
Nom
0.039 0.197 0.252 0.173 0.026 0.024 -
Max
0.048 0.006 0.041 0.012 0.008 0.201 0.260 0.177 0.030 0.004 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

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