APT7843OI

APT7843 ANPEC | Alldatasheet

Document overview

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Technical content

Features

• Operates with four wire touch screen
• 8-bit or 12 bit A/D converter
• Ratiometric Conversion eliminates screen calibration
• 2 auxiliary analog inputs
• 4 wire serial interface
• Full power down control +Vcc 1 10IN3 GND DOUT BUSY DIN DCLK IN4 V REF +Vcc CS PENIRQ Pin Assignment Order Information APT7843 Temp. Range Package Code Package Code N : SSOP O : TSSOP Temp. Range I : - 40 to 85 C°

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw2 PIN NAME DESCRIPTION 1+ V c c Power Supply,2.2V to 5V. 2X + Connect to X+ on touch screen. 3Y + Connect to Y+ on touch screen. 4X - Connect to X- on touch screen. 5Y - Connect to Y- on touch screen. 6G N D Ground 7I N 3 Auxiliary Input of A/D converter. 8I N 4 Auxiliary input of A/D converter. 9V REF Voltage Reference Input. 10 +Vcc Power Supply,2.2V to 5V. 11 PENIRQ Pen interrupt. Open anode output (requires 10kΩ to 100kΩ pull-up resistor externally) 12 DOUT Serial Data Output. This output is high impedance when CS is HIGH. 13 BUSY Busy Output. This output is high impedance when CS is HIGH. 14 DIN Serial Data input. 15 CS Chip Select. (Active Low) 16 DCLK Serial Clock. Pin Descriptions Block Diagram VREF IN4 IN3 PENIRQ DOUT BUSY CS DIN DCLK

12 Bit or 8 Bit

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw3

Electrical Characteristics

At TA = -40°C to 85°C , VCC = +2.7V , VREF = +2.5V , fSAMPLE = 125kHz , fCLK = 16 • f SAMPLE = 2MHz , 12-bit mode , and digital inputs = GND or Vcc , unless otherwise noted. Note : (1) LSB means least Significant Bit. With VREF equal to +2.5V , one LSB is 610µV APT7843PARAMETER CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 12 Bits No missing code 11 Bits Integral Nonlinearity ± 2L S B Offset Error ± 6L S B Offset Error Match 0.1 1 LSB Gain Error ± 4L S B Gain Error Match 0.1 1 LSB Noise 30 uV rms Power Supply Rejection 70 dB REFERANCE INPUT VREF Input Voltage Range 1.0 Vcc DC Leakage Current ± 1 µA VREF Input Impedance CS = GND or Vcc 5 GΩ VREF Input Current 13 40 µA FSAMPLE = 12.5 kHz 2.5 µA CS = Vcc 3 µA DYNAMIC PERFORENCE Aperture Delay 30 ns Aperture Jitter 100 ps Channel to Channel Isolation V IN = 2.5Vp-p ; F IN = 50kHz 100 dB CONVERSION RATE Conversion Time 12 DCLK cycles Track/Hold Acquisition Time 3 DCLK cycles Throughput Rate 125 KSPS SWITCH DRIVERS On-Resistance Y+ , X+ 41 5 Ω Y- , X- 41 5 Ω LOGIC OUTPUTS Output High Voltage , V OH |IOH | ≤ -250 µA Vcc–0.2 V Output Low Voltage , V OL |IOL | ≤ 250 µA 0.4 V PENIRQ output low voltage , V OL 0.2 V Floating-State Leakage Current ± 10 µA Floating-State Output Capacitance 10 pF Output Coding Straight ( Natural ) Binary

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw4 Electrical Characteristics (Cont.) APT7843PARAMETER CONDITIONS MIN TYP MAX UNITS LOGIC INPUTS Input High Voltage , V INH |I INH | ≤ +5 µA2 . 4 V Input Low Voltage , V INL |I INL | ≤ +5 µA0 . 8 V Input Current , I IN ± 1 µA Input Capacitance , C IN 10 pF ANALOG INPUT Input Voltage Ranges 0 V REF Volts DC Leakage Current ± 0.1 µA Input Capacitance 30 pF POWER REQUIREMENTS Vcc 2.7 3.6 V Icc Digital I/Ps =0V or Vcc Normal Mode (Static) Vcc = 3.6V 650 µA Normal Mode (F SAMPLE = 12.5kSPS) Vcc = 3.6V 540 µA Shutdown Mode(Static) 3 µA Showdown Vcc = 3.6V 3.6 µW

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw5 At TA = -40°C to 85°C, VCC = +2.4V , VREF don’t care, fSAMPLE = 1.25KHz, fCLK = 16 • f SAMPLE = 20KHz, 8-bit differential mode, no support single end mode, and digital inputs = GND or Vcc , unless otherwise noted. APT7843PARAMETER CONDITIONS MIN TYP MAX UNITS DC ACCURACY Resolution 8 Bits No missing code 7 Bits Integral Nonlinearity ± 2L S B Offset Error ± 6L S B Offset Error Match 0.1 1 LSB Gain Error ± 4L S B Gain Error Match 0.1 1 LSB Noise 30 uV rms Power Supply Rejection 70 dB DYNAMIC PERFORENCE Aperture Delay 30 ns Aperture Jitter 100 ps Channel to Channel Isolation V IN = 2.5Vp-p ; FIN = 50kHz 100 dB CONVERSION RATE Conversion Time 12 DCLK cycles Track/Hold Acquisition Time 3 DCLK cycles Throughput Rate 1.25 KSPS SWITCH DRIVERS On-Resistance Y+ , X+ 4 Ω Y- , X- 4 Ω LOGIC OUTPUTS Output High Voltage , VOH |IOH| ≤ -250µA Vcc–0.2 V Output Low Voltage , VOL |IOL| ≤ 250µA0 . 4 V PENIRQ output low voltage , VOL 0.2 V Floating-State Leakage Current ± 10 µA Floating-State Output Capacitance 10 pF Output Coding Straight ( Natural ) Binary

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw6 Electrical Characteristics (Cont.) APT7843PARAMETER CONDITIONS MIN TYP MAX UNITS LOGIC INPUTS Input High Voltage , V INH |I INH | ≤ +5 µA2 . 2 V DD +0.2 V Input Low Voltage , V INL |I INL | ≤ +5 µA0 . 6 V Input Current , I IN ± 1 µA Input Capacitance , C IN 10 pF ANALOG INPUT Input Voltage Ranges 0 V REF Volts DC Leakage Current ± 0.1 µA Input Capacitance 30 pF POWER REQUIREMENTS Vcc 2.2 2.4 3.6 V Icc Digital I/Ps =0V or Vcc Normal Mode (Static) Vcc = 2.4V 280 650 µA Normal Mode (F SAMPLE = 12.5kSPS) Vcc = 2.4V 540 µA Shutdown Mode(Static) 3 µA Showdown Vcc = 2.4V 3.6 µW

Copyright  ANPEC Electronics Corp. the A/D converter , and the converter’s reference. directly sets the input range of the converter. rupt pin will go low to wake up extenal microprocess. voltage presented on the IN3 , IN4 pins. FIGURE 1. Basic Operation of the APT7843

Copyright  ANPEC Electronics Corp. FIGURE 2. Simplified Diagram of Analog Input TABLE I. Input C onfiguration, Single-Ended Reference Mode (SER/DFR HIGH). TABLE II. Input Configuration, Differential Reference Mode (SER/ DFR LOW).

Copyright  ANPEC Electronics Corp. cycle in 8-bit conversion mode. 2 SER/DFR Single-Ended/Differential Reference Select Bit. inputs, as detailed in Tables I and II. TABLE V. Power-Down Selection. 1 0 Enabled Reserved for future use. FIGURE 5. Conversion Timing, 24-Clocks per Conversion, 8-bit Bus Interface. No DCLK Delay Required

Copyright  ANPEC Electronics Corp. Above, TA=-40°C to +85°C, CLOAD=50pF). Above, TA=-40°C to +85°C, CLOAD=50pF). FIGURE 7. Maximum Conversion Rate, 15-Clocks per Conversion.

Copyright  ANPEC Electronics Corp. FIGURE 8. Detailed Timing Diagram.

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw14 Packaging Information N 12 3 EH D L GAUGE PLANE e B A1 A Millimeters Variations- D Inches Variations- D A1 0.10 0.25 A1 0.004 0.010 B 0.20 0.30 B 0.008 0.012 D See variations D See variations E 3.75 4.05 E 0.147 0.160 e 0.625 TYP . e 0.025 TYP . H 5.75 6.25 H 0.226 0.246 L 0.4 1.27 L 0.016 0.050 N See variations N See variations φ 10 ° 8°φ 10 ° 8° SSOP

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw15 Packaging Information L (3 ) (2 ) 0.25 GAUGE PLANE b A1 A D e 2 x E / 2 E1 E e/2 N 12 3 Millimeters InchesDim Min. Max. Min. Max. A 1.2 0.047 A1 0.00 0.15 0.000 0.006 A2 0.80 1.05 0.031 0.041 b 0.19 0.30 0.007 0.011 D 4.9 (N=16PIN) 6.4 (N=20PIN) 7.7 (N=24PIN) 9.6 (N=28PIN) 5.1 (N=16PIN) 6.6 (N=20PIN) 7.9 (N=24PIN) 9.8 (N=28PIN) 0.193 (N=16PIN) 0.252 (N=20PIN) 0.303 (N=24PIN) 0.378 (N=28PIN) 0.201 (N=16PIN) 0.260 (N=20PIN) 0.311 (N=24PIN) 0.386 (N=28PIN) e 0.65 BSC 0.026 BSC E 6.40 BSC 0.252 BSC E1 4.30 4.50 0.169 0.177 L 0.45 0.75 0.018 0.030 φ10 ° 8° 0° 8° φ21 2 ° REF 12 ° REF φ31 2 ° REF 12 ° REF TSSOP

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw16 Reflow Condition (IR/Convection or VPR Reflow) Pre-heat temperature 183 C Peak temperature Time temperature Classification Reflow Profiles Convection or IR/ Convection VPR Average ramp-up rate(183 °C to Peak) 3 °C/second max. 10 °C /second max. Preheat temperature 125 ± 25 °C) 120 seconds max Temperature maintained above 183 °C 60 – 150 seconds Time within 5°C of actual peak temperature 10 –20 seconds 60 seconds Peak temperature range 220 +5/-0°C or 235 +5/-0 °C 215-219 °C or 235 +5/-0 °C Ramp-down rate 6 °C /second max. 10 °C /second max. Time 25°C to peak temperature 6 minutes max. Package Reflow Conditions pkg. thickness ≥≥≥≥ 2.5mm and all bgas pkg. thickness < 2.5mm and pkg. volume ≥≥≥≥ 350 mm³ pkg. thickness < 2.5mm and pkg. volume < 350mm³ Convection 220 +5/-0 °C Convection 235 +5/-0 °C VPR 215-219 °C VPR 235 +5/-0 °C IR/Convection 220 +5/-0 °C IR/Convection 235 +5/-0 °C Physical Specifications Terminal Material Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb) Lead Solderability Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw17 Carrier Tape & Reel Dimensions Application A B D0 D1 E F P0 P1 P2 T T2 W W1 C1 C2 T1 T2 CSSOP-14/16 (mm) A J B C t Ao E W Po P Ko Bo D F Test item Method Description SOLDERABILITY MIL-STD-883D-2003 245°C,5 SEC HOLT MIL-STD 883D-1005.7 1000 Hrs Bias @ 125°C PCT JESD-22-B, A102 168 Hrs, 100% RH, 121°C TST MIL-STD 883D-1011.9 -65°C ~ 150°C, 200 Cycles Reliability test program

Copyright  ANPEC Electronics Corp. Rev. A.8 - Apr., 2002 APT7843 www.anpec.com.tw18 Customer Service Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369