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Agamem Microelectronics Inc. PRELIMINARY
FEATURE
AA88348AP
8-BIT DAC
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 AO2 AO3 AO4 AO5 AO6 AO7 VDD
1 2 3
16 15
GND AO1 DI CLK LD DO AO8 VCC
4 5 6 7 8
AA88348AP
14 13 12 11 10 9
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. 20 s settling time. 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 .
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Agamem Microelectronics Inc. PRELIMINARY
PIN DESCRIPTION
Symbol VCC GND VDD VSS CLK LD Data Input/Output DI DO 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 14 11 I O Serial Digital Data input pin Pin No. 9 16 8 1 13 12 I I Type Name & Function +5V system power supply pin System ground pin Analog power supply pin Analog ground pin
AA88348AP
8-BIT DAC
.
.
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
Serial Digital Data output pin. Output from the 12th data in the Shift-Register
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Agamem Microelectronics Inc. PRELIMINARY
BLOCK DIAGRAM Digital Block
(Clock) (Serial
CLK DI D0 D1 D2 D3 12-bit Shift Register D4 D5 D6 D7 D8 D9
AA88348AP
8-BIT DAC
D10
D11
DO
(Serial
digital input)
digital output) 4
4-bit Address Decoder 1234 678 LD
(Strobe)
(System Power)
VCC
8
8-bit Data Latch #8
8
8-bit Data Latch #8
GND (System Ground)
8
R-2R D/A Converter #1
8 Analog Block
D/A Converter #8
(Analog Power)
VDD
OP-B #1
OP-B #8
VSS (Anaglog Ground)
Analog Output
AO1
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 * GND
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Agamem Microelectronics Inc. PRELIMINARY
Cascade Connection
AA88348AP
8-BIT DAC
DI CLK LD DO
Vcc
VDD
MCU
AA88348AP
GND Vss
DI CLK LD DO
Vcc
VDD
AA88348AP
GND Vss
DI CLK LD DO
Vcc
VDD
AA88348AP
GND Vss
* VDD and VSS of each AA88348AP could be different depend on the application consideration
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Agamem Microelectronics Inc. PRELIMINARY
Data
CLK MSB DI
D11 D10 D9 D2 D1
AA88348AP
8-BIT DAC
Input
Format
LSB
D0
LD AO1~8 Past Data New Data
Data
Format
LSB
in Shift
Register
MSB DO
DI
D0 D 1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 Data Address
8
To Data Latch
4
To Address Decoder
Data
D7 0 0 0 D6 0 0 0
Conversion
Data D5 0 0 0 D4 0 0 0 D3 0 0 0 D2 0 0 0 D1 0 0 1 D0 0 1 0 DAC Output Level AOx VSS VSS + LSB* VSS + 2 * LSB
1 1
1 1
1 1
1 1
1 1
1 1
1 1
0 1
VDD - LSB VDD
* LSB = (VDD-VSS)/255
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Agamem Microelectronics Inc. PRELIMINARY
Channel
Address 1H 2H 3H 4H 5H 6H 7H 8H
AA88348AP
8-BIT DAC
Map
D-L #1 D-L #2 D-L #3 D-L #4 D-L #5 D-L #6 D-L #7 D-L #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
OP-B #1 OP-B #2 OP-B #3 OP-B #4 OP-B #5 OP-B #6 OP-B #7 OP-B #8
AO1 AO2 AO3 AO4 AO5 AO6 AO7 AO8
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 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 Reserve
Data Latch Selected
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Agamem Microelectronics Inc. PRELIMINARY
ELECTRICAL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS (See NOTE) Parameter System Voltage Analog Voltage Input Voltage Output Voltage Power Dissipation Operating Ambient Temperature Storage Temperature TS -55 +150 Symbol Min VCC VDD VIN VOUT PD Ta -20 -0.3 -0.3 -0.3 -0.3 Rating Typ Max +7.0 +7.0 VCC + 0.3 VCC + 0.3 250 +85 V V V V mW Unit
AA88348AP
8-BIT DAC
Condition Ta = +25 GND = 0V VDD VCC, Ta = +25 GND = 0V
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 Symbol Min System Voltage VCC GND Analog Voltage Analog Output Current Analog Output Load Capacitance for Oscillation limit Operating Ambient Temperature VDD VSS IAO COL Ta -20 2.0 GND -1.0 4.5 Rating Typ 5.0 0 VCC VCC - 2.0 +1.0 +1.0 +85 Max 5.5 V V V V mA F VAO shift 0.3V VCC VDD, VDD - VSS 2.0V Vss GND Unit Condition
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DC CHARACTERISTICS
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 Min VCC ICC IILK VIL VIH VOL VOH VCC - 0.4 0.5VCC 0.4 -5 4.5 Value Typ 5.0 1.2 Max 5.5 2.5 +5 0.2VCC V Unit
AA88348AP
8-BIT DAC
Ta = 25 Condition
mA CLK = 1 MHz, No load; A VIN = 0V / 5V V V V V IOL = +2.5 mA IOH = -400 A
Analog
Block Parameter Symbol Min IDD VDD VSS VAOH VAOH VAOH VAOL VAOL VAOL Res INL DNL -1.5 -0.5 0 2.0 GND VDD - 0.1 VDD - 0.2 VDD - 0.3 VSS - 0.1 VSS - 0.2 VSS - 0.3 VDD VDD VDD VSS VSS VSS 8 +2 +3.5 Value Typ 0.7 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 mA No load V V V V V V V V bit IAOH = 0 A IAOH = -500 A IAOH = -1mA IAOL = 0 A IAOL = 500 A IAOL = 1mA VDD -VSS Unit
Ta = 25 Condition
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:
2V
VCC =5.5V, GND=0V LSB VDD=4.775V, VSS=0.95 LSB = 15mv, no load LSB
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.
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Agamem Microelectronics Inc. PRELIMINARY
AC CHARACTERISTICS
Parameter Clock Rate Load Strobe Pulse Width Analog Output Settling Time Digital Output Delay Time Symbol Min TCR TLDP TAOS TDDO 100 50 20 200 Value Typ Max Unit ns ns ns
AA88348AP
8-BIT DAC
Ta = 25
Condition
s *RAL = 10 k , CAL = 50pF (#00--> #FF) ns **CL = 100 pF (Max.)
AC
Test
*
Condition
*
Analog Output Settling Time Test Point
Digital Output Delay Time Test Point
Device Under Test RAL*
Device Under Test CL**
CAL*
Timing
Chart
0.8
Vcc
CLK
0.2
Vcc
0.2
Vcc
TCR
LD
TLDP
0.8 Vcc
TAOS
AOx
Past Data TDDO
0.8 0.2
New Data
DO
Past Data
0.8 0.2
New Data
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2006/7/5
Agamem Microelectronics Inc. PRELIMINARY
TSSOP PACKAGE DIMENSION
AA88348AP
8-BIT DAC
SYMBOLS
A A1 A2 b C D E
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
----1.00 ----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 (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

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