AS1100 AMSOSRAM | Alldatasheet
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Technical content
The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30
8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0 e-Mail: ams_sales@ams.com Please visit our website at www.ams.com
1 General Description
reprogramming is not necessary. Every individual segment can be addressed and updated separately. display numeric digits or to address each segment directly. The AS1100 is offered in a 24Opin SOIC package.
2 Key Features
3 Applications
such as washing machines and dishwasher. Figure 1. AS1100 - Typical Application Diagram
8 Digits
8 SegmentsGNDGND
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
4.1 Pin Descriptions
mode the AS1100 switches the outputs to VDD . 4, 9 GND Both GND pins must be connected.
13 CLK
DOUT pin the data is applied with the falling edge of CLK.
18 ISET The current into ISET determines the peak current through the segments and therefore the
19 VDD Positive Supply Voltage (+5V)
output is never set to high impedance.
24 DOUTDIN
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 3 O 16 AS1100 Datasheet O Absolute Maximum Ratings
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 4 is not implied. Exposure to absolute m aximum rating conditions for extended periods may affect device reliability. T able 2. Absolute Maximum Ratings Parameter Min Max Units Notes Electrical Parameters VDD to GND O0.3 7 V All other pins to GND O0.3 VDD + 0.3 (max 7V) V Current DIG 0:DIG 7 Sink Current 500 mA SEG A : SEG G, SEG DP 100 mA LatchOUp Immunity ±200 mA Norm: JEDEC 78 Electrostatic Discharge Digital outputs 500 V Norm: MIL 883 E method 3015 All other pins 1000 V Continuous Power Dissipation (TA = +85°C) Wide SOIC 941 mW Derate 11.8mW/ºC above +70ºC Temperature Ranges and Storage Conditions Storage Temperature Range O55 +150 ºC Package Body Temperature (Wide SOIC) +260 ºC The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/ JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices”. The lead finish for PbOfree leaded packages is matte tin (100% Sn). Humidity 5 85 % NonOcondensing Moisture Sensitive Level 3 Represents a max. floor life time of 168h ams AG Technical content still valid
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 4 O 16 AS1100 Datasheet O Electrical Characteristics
6 Electrical Characteristics
VDD = 5V, RSET = 9.53kΩ ±1%, TA = TMIN to TMAX (unless otherwise specified). All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. T able 3. Electrical Characteristics Symbol Parameter Conditions Min Typ Max Units TAMB Operating Temperature Range O40 +85 ºC VDD Operating Supply Voltage 4.0 5.0 5.5 V IDDSD Shutdown Supply Current All digital inputs at VDD or GND, TA = +25ºC 20 50 µA IDD Operating Supply Current RSET = open circuit 500 µA All segments and decimal point on, ISEG = O40mA 330 mA fOSC Display Scan Rate 8 digits scanned 500 800 1300 Hz IDIGIT Digit Drive Sink Current VOUT = 0.65V 320 mA ISEG Segment Drive Source Current TA = +25ºC, VOUT = (VDD O1V) O30 O40 O45 mA ΔISEG Segment Drive Current Matching 3.0 % IDIGIT Digit Drive Source Current Digit off, VDIGIT = (VDD O0.3V) O2 mA ISEG Segment Drive Sink Current Segment off, VSEG = 0.3V 5 mA Logic Inputs IIH, IIL Input Current DIN, CLK, LOAD VIN = 0V or VDD O1 1 µA VIH Logic High Input Voltage 3.5 V VIL Logic Low Input Voltage 0.8 V VOH Output High Voltage DOUT, ISOURCE = O1mA V DD O 1 V VOL Output Low Voltage DOUT, ISINK = 1.6mA 0.4 V Hysteresis Voltage DIN, CLK, LOAD 1 V Timing Characteristics tCP CLK Clock Period 100 ns tCH CLK Pulse Width High 50 ns tCL CLK Pulse Width Low 50 ns tCSH CLK Rise to LOAD Rise Hold Time 0 ns tDS DIN Setup Time 25 ns tDH DIN Hold Time 0 ns tDO Output Data Propagation Delay CLOAD = 50pF 25 ns tLDCK LOAD Rising Edge to Next Clock Rising Edge 50 ns tCSW Minimum LOAD Pulse High 50 ns tDSPD DataOtoOSegment Delay 2.25 ms ams AG Technical content still valid
7 Typical Operating Characteristics
Figure 3. Segment Driver Capability, Figure 4. Segment Current vs. R SET
8 Detailed Description
8.1 SerialVAddressing Modes
exact timing is given in Figure 5. Figure 5. Timing Diagram
8.2 Digit and Control Registers
consist of decode mode, display intensity, number of scanned digits, shutdown, display test, and reset/external clock register.
8.3 Shutdown Mode
AS1100 is fully programmable. Only the display test function overrides the shutdown mode.
8.4 Initial PowerVUp
register are set to the minimum value.
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 7 O 16 AS1100 Datasheet O Detailed Description
8.5 DecodeVMode Register
In the AS1100 a BCD decoder is included. Every digit can be selected via register 09h to be decoded. The BCD code consists of the numbers 0O 9, E,H, L,P and O. In register 09h a logic high enables the decoder for the appropriate digit. In case that the decoder is bypassed (logic low) the data Bits D7OD0 correspond to the segment lines of the AS1100. In Table 7 some possible settings for register 09h are shown. Bit D7, which corresponds to the decimal point, is not affected by the settings of the decoder. Logic high means that the decimal point is displayed. In Table 8 t he font of the Code B decoder is shown. In Table 9 the correspondence of the register to the appropria te segments of a 7 segment display is shown (see Figure 6).
8.6 Intensity Control and Interdigit Blanking
Brightness of the display can be controlled in an analog way by changing the external resistor (RSET ). The current, which flows between VDD and ISET, defines the current that flows through the LEDs. The LED current is 100 times the ISET current. The minimum value of RSET should be 9.53kΩ , which corresponds to 40mA segment current. The brightness of the display can also be controlled digitally via register 0Ah. The brightness can be programmed in 16 steps and is shown in Table 10. An internal pulse width modulator controls the int ensity of the display.
8.7 ScanVLimit Register
The scan limit register 0Bh selects the number of digits displayed. When all 8 digits are displayed the update frequency is typically 800Hz. If the number of digits displayed is reduced, the update frequency is reduced as well. The frequency can be calculated using 8fOSC/N, where N is the number of digits. Since the number of displayed digits influences the brightness, the resistor RSET should be adjusted accordingly. The Table 12 s hows the maximum allowed current, when fewer than 4 digits are used. To avoid differences in brightness the scan limit register should not be used to blank portions of the display (leading zeros). T able 5. Register Address Map Register Address Hex CodeD15VD12 D11 D10 D9 D8 NoOOp X 0 0 0 0 0xX0 Digit 0 X 0 0 0 1 0xX1 Digit 1 X 0 0 1 0 0xX2 Digit 2 X 0 0 1 1 0xX3 Digit 3 X 0 1 0 0 0xX4 Digit 4 X 0 1 0 1 0xX5 Digit 5 X 0 1 1 0 0xX6 Digit 6 X 0 1 1 1 0xX7 Digit 7 X 1 0 0 0 0xX8 Decode Mode X 1 0 0 1 0xX9 Intensity X 1 0 1 0 0xXA Scan Limit X 1 0 1 1 0xXB Shutdown X 1 1 0 0 0xXC Not used X 1 1 0 1 0xXD Reset and ext. Clock X 1 1 1 0 0xXE Display Test X 1 1 1 1 0xXF T able 6. Shutdown Register Format (address (hex) = 0xXC Mode Address Code (Hex) Register Data D7 D6 D5 D4 D3 D2 D1 D0 Shutdown Mode 0xXC X X X X X X X 0 Normal Operation 0xXC X X X X X X X 1 ams AG Technical content still valid
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 8 O 16 AS1100 Datasheet O Detailed Description Note: The decimal point is set by bit D7 = 1 T able 7. Decode-mode Register Examples (address (hex) = 0xX9 Decode Mode Register Data Hex Code D7 D6 D5 D4 D3 D2 D1 D0 No decode for digits 7–0 0 0 0 0 0 0 0 0 0x00 Code B decode for digit 0 No decode for digits 7–1 0 0 0 0 0 0 0 1 0x01 Code B decode for digits 3–0 No decode for digits 7– 4 0 0 0 0 1 1 1 1 0x0F Code B decode for digits 7–0 1 1 1 1 1 1 1 1 0xFF T able 8. Code B font 7VSegment Character Register Data On Segments = 1 D7* D6VD4 D3 D2 D1 D0 DP* A B C D E F G
0 X 0 0 0 0 1 1 1 1 1 1 0
1 X 0 0 0 1 0 1 1 0 0 0 0
2 X 0 0 1 0 1 1 0 1 1 0 1
3 X 0 0 1 1 1 1 1 1 0 0 1
4 X 0 1 0 0 0 1 1 0 0 1 1
5 X 0 1 0 1 1 0 1 1 0 1 1
6 X 0 1 1 0 1 0 1 1 1 1 1
7 X 0 1 1 1 1 1 1 0 0 0 0
8 X 1 0 0 0 1 1 1 1 1 1 1
9 X 1 0 0 1 1 1 1 1 0 1 1
OO X 1 0 1 0 0 0 0 0 0 0 1 E X 1 0 1 1 1 0 0 1 1 1 1 H X 1 1 0 0 0 1 1 0 1 1 1 L X 1 1 0 1 0 0 0 1 1 1 0 P X 1 1 1 0 1 1 0 0 1 1 1 blank X 1 1 1 1 0 0 0 0 0 0 0 T able 9. No-decode Mode Data Bits and Corresponding Segment Lines Register Data D7 D6 D5 D4 D3 D2 D1 D0 Corresponding Segment Line DP A B C D E F G ams AG Technical content still valid
Figure 6. Standard 7-segment LED
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 1 0 O 16 AS1100 Datasheet O Detailed Description
8.8 Display Test Register
With the display test register 0Fh all LED can be tested. In the test mode all LEDs are switched on at maximum brightness (duty cycle 31/32). All programming of digit and control registers are maintained. The format of the register is given in Table 13. Note: The AS1100 remains in displayOtest mode until the displayOtest register is reconfigured for normal operation.
8.9 NoVOp Register (Cascading of AS1100)
The noOoperation register 00h is used when AS1100s are cascaded in order to support more than 8 digit displays. The cascading must be done in a way that all DOUT are connected to DINof the following AS1100. The LOAD and CLK signals are connected to all devices. For a write operation for example to the fifth device the command must be followed by four noOoperation commands. When the LOAD signal finally goes to high all shift registers are latched. The first four devices have got noOoperation commands and only the fifth device sees the intended command and updates its register.
8.10 Reset and External Clock Register
This register is addressed via the serial interface. It allows to switch the device to external clock mode (If D0=1 the CLK pin of the serial interface operates as system clock input.) and to apply an external reset (D1). This brings all registers (except reg. E) to default state. For standard operation the register contents should be "00h". T able 12. Maximum Segment Current for 1-, 2-, or 3-digit Displays Number of digits Displayed Maximum Segment Current (mA) 1 10 2 20 3 30 T able 13. Display-test Register Format (address (hex) = 0xXF) Mode Register Data D7 D6 D5 D4 D3 D2 D1 D0 Normal Operation X X X X X X X 0 Display Test Mode X X X X X X X 1 T able 14. Reset and External Clock Register (address (hex) = oxXE) Mode Address Register Data code (Hex) D7 D6 D5 D4 D3 D2 D1 D0 Normal Operation, internal clock 0xXE X X X X X X 0 0 Normal Operation, external clock 0xXE X X X X X X 0 1 Reset state, internal clock 0xXE X X X X X X 1 0 Reset state, external clock 0xXE X X X X X X 1 1 ams AG Technical content still valid
9 Application Information
9.1 Supply Bypassing and Wiring
and GND to avoid power supply ripple. Also, both GNDs must be connected to ground.
9.2 Selecting RSET Resistor and Using External Drivers
to calculate acceptable limits for ambient temperature, segment current, and the LED forwardOvoltage drop. in a column can be addressed as stated in Table 9, where D0 corresponds to segment G and D7 correspon ds to segment DP. Note: For a multipleOdigit dot matrix, multiple AS1100 devices must be cascaded. Figure 7. Application Example as LED Dot Matrix Driver
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 1 2 O 16 AS1100 Datasheet O Application Information
9.4 Calculating the Power Dissipation
The upper limit for power dissipation (PD) for the AS1100 is determined from the following equation: PD = (V DD x 0.5mA) + (VDD - VLED )(DUTY x I SEG x N) (EQ 1) Where: VDD = supply voltage DUTY = duty cycle set by intensity register N = number of segments driven (worst case is 8) VLED = LED forward voltage ISEG = segment current set by RSET Dissipation Example: ISEG = 40mA, N = 8, DUTY = 31/32, VLED = 1.8V at 40mA, VDD = 5.25V Thus, for a PDIP package θJA = +75°C/W (from Table 13), the maximum allowed ambient temperature TA is given by: TJ,MAX = TA + PD x θJA = 150°C = TA +1.07W x 75°C/W. Where: TA = +69.7°C. The TA limit for SO Packages in the dissipation example above is +59.0°C. T able 16. Package Thermal Resistance Data Package Thermal Resistance (θJA)
24 Wide SO +85ºC/w
Maximum Junction Temperature (TJ) = +150ºC Maximum Ambient Temperature (TA) = +85ºC ams AG Technical content still valid
Figure 8. AS1100 Marking
Figure 9. SOIC 24-pin Package Diagram
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 1 5 O 16 AS1100 Datasheet O Ordering Information The device is available as the standard products shown in Table 18. Note: All products are RoHS compliant and austriamicrosystems green. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect Technical Support is found at http://www.austriamicrosystems.com/Technical-Support For further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor T able 18. Ordering Information Ordering Code Marking Description Temp Range Delivery Form Package AS1100WL AS1100WL Serially Interfaced, 8ODigit LED Driver 0ºC to +70ºC Tubes SOIC 24Opin AS1100WE AS1100WE Serially Interfaced, 8ODigit LED Driver O40ºC to +85ºC Tubes SOIC 24Opin AS1100WLOT AS1100WL Serially Interfaced, 8ODigit LED Driver 0ºC to +70ºC Tape & Reel SOIC 24Opin AS1100WEOT AS1100WE Serially Interfaced, 8ODigit LED Driver O40ºC to +85ºC Tape & Reel SOIC 24Opin ams AG Technical content still valid
www.austriamicrosystems.com/LEDODriverOICs/AS1100 Revision 1.37 1 6 O 16 AS1100 Datasheet Copyrights Copyright © 1997O2012, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, AustriaOEurope. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical lifeOsupport or lifeOsustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 AO8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact ams AG Technical content still valid