DAC7724 DAC7725 ® DAC 772 4 DAC 772 5 For most current data sheet and other product information, visit www.burr-brown.com 12-Bit Quad Voltage Output DIGITAL-TO-ANALOG CONVERTER FEATURES DESCRIPTION ● LOW POWER: 250mW max ● SINGLE SUPPLY OUTPUT RANGE: +10V ● DUAL SUPPLY OUTPUT RANGE: ±10V ● SETTLING TIME: 10µs to 0.012% ● 12-BIT LINEARITY AND MONOTONICITY: –40°C to +85°C ● RESET TO MID-SCALE (DAC7724) OR ZERO-SCALE (DAC7725) ● DATA READBACK ● DOUBLE-BUFFERED DATA INPUTS The DAC7724 and DAC7725 are 12-bit quad voltage output digital-to-analog converters with guaranteed 12-bit monotonic performance over the specified temperature range. They accept 12-bit parallel input data, have double-buffered DAC input logic (allowing simultaneous update of all DACs), and provide a readback mode of the internal input registers. An asynchronous reset clears all registers to a mid-scale code of 800H (DAC7724) or to a zero-scale of 000H (DAC7725). The DAC7724 and DAC7725 can operate from a single +15V supply, or from +15V and –15V supplies. APPLICATIONS ● PROCESS CONTROL ● CLOSED-LOOP SERVO-CONTROL ● MOTOR CONTROL ● DATA ACQUISITION SYSTEMS GND 12 DB0-DB11 A0 A1 R/W CS I/O Buffer Control Logic Low power and small size per DAC make the DAC7724 and DAC7725 ideal for automatic test equipment, DAC-per-pin programmers, data acquisition systems, and closed-loop servo-control. The DAC7724 and DAC7725 are available in a PLCC-28 or a SO-28 package, and offer guaranteed specifications over the –40°C to +85°C temperature range. VDD VCC VREFH Input Register A DAC Register A DAC A VOUTA Input Register B DAC Register B DAC B VOUTB Input Register C DAC Register C DAC C VOUTC Input Register D DAC Register D DAC D VOUTD RESET LDAC VREFL VSS International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1999 Burr-Brown Corporation SBAS112 PDS-1517B Printed in U.S.A. April, 2000 SPECIFICATION (DUAL SUPPLY) At TA = –40°C to +85°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, unless otherwise noted. DAC7724N, U DAC7725N, U PARAMETER CONDITIONS ACCURACY Linearity Error Linearity Matching(2) Differential Linearity Error Monotonicity Zero-Scale Error Zero-Scale Drift Zero-Scale Matching(2) Full-Scale Error Full-Scale Matching(2) Power Supply Sensitivity ANALOG OUTPUT Voltage Output(3) Output Current Load Capacitance Short-Circuit Current Short-Circuit Duration TYP MAX MIN TYP ±2 ±2 ±1 TMIN to TMAX Code = 000H ±2 At Full Scale ✻ VREFH No Oscillation VREFL +1.25 –10 –0.5 –3.5 POWER SUPPLY REQUIREMENTS VDD VCC VSS I DD I CC I SS Power Dissipation TEMPERATURE RANGE Specified Performance ✻ ✻ +10 VREFH – 1.25 3.0 0 8 0.25 2 65 2.4 –0.3 3.6 0.0 ✻ ✻ ✻ ✻ ✻ ✻ 10 –40 V V mA mA ✻ µs LSB nV-s nV/√Hz ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ V V V V ✻ ✻ ✻ ✻ ✻ ✻ V V V µA mA mA mW ✻ °C ✻ Straight Binary –8 ✻ ✻ ✻ ✻ ✻ VDD +0.3 0.8 VDD 0.4 +5.25 +15.75 –15.75 50 6 –6 180 V mA pF mA ✻ TTL-Compatible CMOS +4.75 +14.25 –14.25 ✻ ✻ ✻ ✻ ✻ 500 ±20 Indefinite To VSS, V CC, or GND IIH ≤ ±10µA IIL ≤ ±10µA IOH = –0.8mA I OL = 1.6mA LSB(1) LSB LSB Bits LSB ppm/°C LSB LSB LSB ppm/V ±1 ✻ ±1 10 VREFL ±5 DIGITAL INPUT/OUTPUT Logic Family Logic Levels VIH VIL VOH VOL Data Format ±1 ±1 ±1 ✻ ±2 ±2 ±2 f = 10kHz UNITS ✻ Code = FFFH To ±0.012%, 20V Output Step Full-Scale Step MAX ✻ 12 1 REFERENCE INPUT VREFH Input Range VREFL Input Range Ref High Input Current Ref Low Input Current DYNAMIC PERFORMANCE Settling Time Channel-to-Channel Crosstalk Digital Feedthrough Output Noise Voltage MIN DAC7724NB, UB DAC7725NB, UB ✻ ✻ ✻ 8.5 ✻ 250 +85 ✻ ✻ ✻ ✻ ✻ NOTES: (1) LSB means Least Significant Bit, when VREFH equals +10V and VREFL equals –10V, then one LSB equals 4.88mV. (2) All DAC outputs will match within the specified error band. (3) Ideal output voltage, does not take into account zero or full-scale error. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ® DAC7724, 7725 2 SPECIFICATION (SINGLE SUPPLY) At TA = –40°C to +85°C, VCC = +15V, VDD = +5V, VSS = GND, VREFH = +10V, VREFL = 0V, unless otherwise noted. DAC7724N, U DAC7725N, U PARAMETER ACCURACY Linearity Error(1) Linearity Matching(3) Differential Linearity Error Monotonicity Zero-Scale Error Zero-Scale Drift Zero-Scale Matching(3) Full-Scale Error Full-Scale Matching(3) Power Supply Sensitivity ANALOG OUTPUT Voltage Output(4) Output Current Load Capacitance Short-Circuit Current Short-Circuit Duration CONDITIONS DIGITAL INPUT/OUTPUT Logic Family Logic Levels VIH VIL VOH VOL Data Format POWER SUPPLY REQUIREMENTS VDD VCC IDD ICC Power Dissipation TEMPERATURE RANGE Specified Performance TYP MAX MIN TYP ±2 ±2 ±1 TMIN to TMAX Code = 004H ±4 At Full Scale ✻ VREFH No Oscillation ✻ ✻ To VCC or GND VREFL +1.25 0 –0.3 –2.0 +10 VREFH – 1.25 1.5 0 8 0.25 2 65 2.4 –0.3 3.6 0.0 ✻ ✻ ✻ ✻ ✻ ✻ 10 V mA pF mA ✻ ✻ ✻ ✻ V V mA mA ✻ µs LSB nV-s nV/√Hz ✻ ✻ TTL-Compatible CMOS VDD +0.3 0.8 VDD 0.4 ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ ✻ V V V V ✻ ✻ ✻ ✻ V V µA mA mW ✻ °C ✻ Straight Binary +4.75 14.25 ✻ ✻ ✻ ✻ 500 ±20 Indefinite +5.25 15.75 ✻ ✻ ✻ ✻ ✻ 50 3.0 45 –40 LSB(2) LSB LSB Bits LSB ppm/°C LSB LSB LSB ppm /V ±2 ✻ ±2 20 VREFL ±5 IIH ≤ ±10µA IIL ≤ ±10µA IOH = –0.8mA IOL = 1.6mA ±1 ±1 ±1 ✻ ±4 ±4 ±4 f = 10kHz UNITS ✻ Code = FFFH To ±0.012%, 10V Output Step MAX ✻ 12 2 REFERENCE INPUT VREFH Input Range VREFL Input Range Ref High Input Current Ref Low Input Current DYNAMIC PERFORMANCE Settling Time(5) Channel-to-Channel Crosstalk Digital Feedthrough Output Noise Voltage MIN DAC7724NB, UB DAC7725NB, UB +85 ✻ NOTES: (1) If VSS = 0V, specification applies at code 004H and above. (2) LSB means Least Significant Bit, when VREFH equals +10V and VREFL equals 0V, then one LSB equals 2.44mV. (3) All DAC outputs will match within the specified error band. (4) Ideal output voltage, does not take into account zero or full-scale error. (5) Full-scale positive 10V step and negative step from code FFFH to 004H. ® 3 DAC7724, 7725 ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY VCC to VSS ........................................................................... –0.3V to +32V VCC to GND ......................................................................... –0.3V to +16V VSS to GND ......................................................................... +0.3V to –16V VDD to GND ............................................................................. –0.3V to 6V VREFH to GND ....................................................................... –9V to +11V VREFL to GND (VSS = –15V) ................................................. –11V to +9V VREFL to GND (VSS = 0V) .................................................... –0.3V to +9V VREFH to VREFL ....................................................................... –1V to +22V Digital Input Voltage to GND ................................... –0.3V to VDD + 0.3V Digital Output Voltage to GND ................................. –0.3V to VDD + 0.3V Maximum Junction Temperature ................................................... +150°C Operating Temperature Range ........................................ –40°C to +85°C Storage Temperature Range ......................................... –65°C to +150°C Lead Temperature (soldering, 10s) ............................................... +300°C This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability. PACKAGE/ORDERING INFORMATION PRODUCT MAXIMUM LINEARITY ERROR (LSB) MAXIMUM DIFFERENTIAL NONLINEARITY ERROR (LSB) DAC7724N PACKAGE PACKAGE DRAWING NUMBER SPECIFICATION TEMPERATURE RANGE ±2 ±1 PLCC-28 251 –40°C to +85°C " " " " " " DAC7724NB ±1 ±1 PLCC-28 251 –40°C to +85°C " " " " " " ±2 ±1 SO-28 217 –40°C to +85°C DAC7724U " " " " " " DAC7724UB ±1 ±1 SO-28 217 –40°C to +85°C " DAC7725N " " " " " ±2 ±1 PLCC-28 251 –40°C to +85°C " " " " " " DAC7725NB ±1 ±1 PLCC-28 251 –40°C to +85°C " DAC7725U " " " " " ±2 ±1 SO-28 217 –40°C to +85°C " " " " " " DAC7725UB ±1 ±1 SO-28 217 –40°C to +85°C " " " " " " ORDERING NUMBER(1) TRANSPORT MEDIA DAC7724N DAC7724N/750 DAC7724NB DAC7724NB/750 DAC7724U DAC7724U/1K DAC7724UB DAC7724UB/1K DAC7725N DAC7725N/750 DAC7725NB DAC7725NB/750 DAC7725U DAC7725U/1K DAC7725UB DAC7725UB/1K Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel Rails Tape and Reel NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /750 indicates 750 devices per reel). Ordering 750 pieces of “DAC7724/750” will get a single 750-piece Tape and Reel. ESD PROTECTION CIRCUITS VCC VCC RefH VOUT RefL VSS VSS 1 of 4 VDD VDD Typ of Each Logic Input Pin Typ of Each I/O Pin ® DAC7724, 7725 4 GND PIN CONFIGURATIONS Top View VREFH 1 28 VREFL VOUTA VOUTB VREFH VREFL VOUTC VOUTD PLCC VSS SO VOUTB 2 27 VOUTC 4 3 2 1 28 27 26 VOUTA 3 26 VOUTD 7 DAC7724 DAC7725 8 9 22 21 20 7 (LSB) DB0 8 DB1 9 23 CS CS A0 20 R/W DB2 10 R/W 19 DB11 (MSB) DB3 11 18 DB10 DB4 12 17 DB9 DB5 13 16 DB8 DB6 14 15 DB7 22 A0 21 A1 A1 DB2 10 DAC7724 DAC7725 19 DB11 (MSB) DB3 11 12 13 14 15 16 17 18 DB10 23 LDAC DB9 DB1 6 VDD 24 VDD DB8 (LSB) DB0 24 6 DB7 LDAC 5 RESET VCC DB6 RESET 25 25 VCC DB5 GND 4 5 DB4 VSS GND PIN DESCRIPTIONS PIN NAME DESCRIPTION 1 VREFH Reference Input Voltage High. Sets maximum output voltage for all DACs. 2 VOUTB DAC B Voltage Output. 3 VOUTA DAC A Voltage Output. 4 VSS 5 GND 6 RESET 7 LDAC 8 DB0 Negative Analog Supply Voltage, 0V or –15V. Ground. Asynchronous Reset Input. Sets DAC and input registers to either mid-scale (800H, DAC7724) or zero-scale (000H, DAC7725) when LOW. Load DAC Input. All DAC Registers are transparent when LOW. Data Bit 0. Least significant bit of 12-bit word. 9 DB1 Data Bit 1 10 DB2 Data Bit 2 11 DB3 Data Bit 3 12 DB4 Data Bit 4 13 DB5 Data Bit 5 14 DB6 Data Bit 6 15 DB7 Data Bit 7 16 DB8 Data Bit 8 17 DB9 Data Bit 9 18 DB10 Data Bit 10 19 DB11 Data Bit 11. Most significant bit of 12-bit word. 20 R/W Read/Write Control Input (read = HIGH, write = LOW). 21 A1 Register/DAC Select (C or D = HIGH, A or B = LOW). 22 A0 Register/DAC Select (B or D = HIGH, A or C = LOW). 23 CS Chip Select Input. 24 VDD Positive Digital Supply, +5V. 25 VCC Positive Analog Supply Voltage, +15V nominal. 26 VOUTD DAC D Voltage Output. 27 VOUTC DAC C Voltage Output. 28 VREFL Reference Input Voltage Low. Sets minimum output voltage for all DACs. ® 5 DAC7724, 7725 TYPICAL PERFORMANCE CURVES: VSS = 0V At TA = +25°C, VCC = +15V, VDD = +5V, VSS = 0V, VREFH = +10V, VREFL = 0V, representative unit, unless otherwise specified. LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE Single Channel 85°C (Typical of Each Output Channel) DLE (LSB) 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 000H LE (LSB) 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 200H 400H 600H 800H A00H C00H E00H FFFH 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 000H 200H 400H 800H A00H C00H E00H LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE Single Channel –40°C (Typical of Each Output Channel) ZERO-SCALE ERROR vs TEMPERATURE (Code 004H) FFFH 2.0 1.5 DAC B 1.0 DAC D DAC A 0.5 0 –0.5 DAC C –1.0 –1.5 –2.0 200H 400H 600H 800H A00H C00H E00H –40 –30 –20 –10 0 FFFH CURRENT vs CODE All DACs Sent to Indicated Code FULL-SCALE ERROR vs TEMPERATURE (Code FFFH) VREFH VREF Current (mA) 2.0 1.5 1.0 DAC B DAC D DAC A 0.5 VREF Current (mA) 0 –0.5 DAC C –1.0 –1.5 –2.0 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 Temperature (°C) 1.2 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 0 –0.2 –0.4 –0.6 –0.8 –1.0 –1.2 –1.4 –1.6 000H VREFL 200H 400H 600H 800H A00H Digital Input Code ® DAC7724, 7725 10 20 30 40 50 60 70 80 90 Temperature (°C) Digital Input Code Full-Scale Error (mV) 600H Digital Input Code 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 000H 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 Digital Input Code Zero-Scale Error (mV) DLE (LSB) LE (LSB) DLE (LSB) LE (LSB) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE Single Channel 25°C (Typical of Each Output Channel) 6 C00H E00H FFFH TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.) At TA = +25°C, VCC = +15V, VDD = +5V, VSS = 0V, VREFH = +10V, VREFL = 0V, representative unit, unless otherwise specified. POSITIVE SUPPLY CURRENT vs DIGITAL INPUT CODE POWER SUPPLY CURRENT vs TEMPERATURE 4.0 3.00 2.50 3.0 2.5 No Load ICC (mA) 2.00 2.0 1.5 1.0 1.50 1.00 0.5 IDD 0.50 0 IDD –0.5 –40 –30 –20 –10 0 0 000H 10 20 30 40 50 60 70 80 90 100 200H 400H 600H 800H A00H C00H E00H FFFH Temperature (°C) Digital Input Code OUTPUT VOLTAGE vs SETTLING TIME (0V to +10V) OUTPUT VOLTAGE vs SETTLING TIME (+10V to 0V) Large Signal Settling Time: 5V/div Output Voltage Output Voltage Large Signal Settling Time: 5V/div Small Signal Settling Time: 1LSB/div Small Signal Settling Time: 1LSB/div +5V LDAC 0 +5V LDAC 0 Time (2µs/div) Time (2µs/div) OUTPUT VOLTAGE MID-SCALE GLITCH PERFORMANCE OUTPUT VOLTAGE MID-SCALE GLITCH PERFORMANCE Output Voltage (200mV/div) Output Voltage (200mV/div) Quiescent Current (mA) ICC ICC 3.5 7FFH to 800H +5V LDAC 0 Time (1µs/div) 800H to 7FFH +5V LDAC 0 Time (1µs/div) ® 7 DAC7724, 7725 TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.) At TA = +25°C, VCC = +15V, VDD = +5V, VSS = 0V, VREFH = +10V, VREFL = 0V, representative unit, unless otherwise specified. LOGIC SUPPLY CURRENT vs LOGIC INPUT LEVEL FOR DATA BITS OUTPUT NOISE vs FREQUENCY 1000 Logic Supply Current (mA) 5 Noise (nV/√Hz) Code 004H 100 Code FFFH 10 4 3 2 1 0 0 0.1 1 10 100 Frequency (kHz) 1000 10000 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Logic Input Level for Data Bits (V) OUTPUT VOLTAGE vs RLOAD SINGLE SUPPLY CURRENT LIMIT vs INPUT CODE 16 20 14 15 12 Short to Ground 10 IOUT (mA) 10 8 6 4 5 0 –5 –10 2 Short to VCC –15 Sink 0 0.01 0.1 1 10 –20 000H 100 200H 400H RLOAD (kW) 600H 800H A00H C00H Digital Input Code POWER SUPPLY REJECTION RATIO vs FREQUENCY 0 –10 PSRR (dB) VOUT (V) Source –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 +15V +5V 101 102 103 104 Frequency (Hz) ® DAC7724, 7725 8 105 106 E00H FFFH TYPICAL PERFORMANCE CURVES: VSS = –15V At TA = +25°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, representative unit, unless otherwise specified. LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE Single Channel 85°C (Typical of Each Output Channel) DLE (LSB) 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 000H LE (LSB) 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 200H 400H 600H 800H A00H C00H E00H FFFH 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 000H 400H 600H 800H A00H C00H LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE Single Channel –40°C (Typical of Each Output Channel) CURRENT vs CODE All DACs Sent to Indicated Code VREF Current (mA) VREF Current (mA) 200H 400H 600H 800H A00H C00H E00H E00H FFFH 0 –0.5 –1.0 –1.5 –2.0 –2.5 –3.0 000H VREFL 200H 400H 600H 800H A00H C00H E000H FFFH Digital Input Code Digital Input Code BIPOLAR ZERO-SCALE ERROR vs TEMPERATURE (Code 800H) POSITIVE FULL-SCALE ERROR vs TEMPERATURE (Code FFFH) 2.0 1.5 1.5 1.0 DAC A DAC B 0.5 0 DAC D –1.0 FFFH VREFH 2.5 2.0 1.5 1.0 0.5 0 –0.5 2.0 –0.5 200H Digital Input Code 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 000H 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 Digital Input Code Positive Full-Scale Error (mV) Bipolar Zero-Scale Error (mV) DLE (LSB) LE (LSB) DLE (LSB) LE (LSB) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE Single Channel 25°C (Typical of Each Output Channel) DAC C –1.5 –2.0 1.0 DAC B 0.5 DAC D 0 –0.5 DAC A –1.0 DAC C –1.5 –2.0 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 –40 –30 –20 –10 0 Temperature (°C) 10 20 30 40 50 60 70 80 90 Temperature (°C) ® 9 DAC7724, 7725 TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.) At TA = +25°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, representative unit, unless otherwise specified. NEGATIVE FULL-SCALE ERROR vs TEMPERATURE (Code 000H) POWER SUPPLY CURRENT vs TEMPERATURE 1.5 1.0 Quiescent Current (mA) Negative Full-Scale Error (mV) 2.0 DAC B DAC D DAC A 0.5 0 –0.5 DAC C –1.0 –1.5 –2.0 –40 –30 –20 –10 0 7 6 5 4 3 2 1 0 –1 –2 –3 –4 –5 –6 –7 ICC Data = FFFH (all DACs) No Load IDD ISS –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 OUTPUT VOLTAGE vs RLOAD 15 10 Supply Current (mA) Source 0 –5 Sink –10 0.1 1 10 100 SUPPLY CURRENT vs CODE 6 ICC 5 4 Data = FFFH (all DACs) 3 No Load 2 1 0 IDD –1 –2 –3 –4 ISS –5 –6 000H 200H 400H 600H 800H A00H C00H E00H FFFH RLOAD (kΩ) Digital Input Code OUTPUT VOLTAGE vs SETTLING TIME (–10V to +10V) OUTPUT VOLTAGE vs SETTLING TIME (+10V to –10V) Output Voltage Large Signal Settling Time: 5V/div Output Voltage VOUT (V) 5 –15 0.01 10 20 30 40 50 60 70 80 90 Temperature (°C) Temperature (°C) Small Signal Settling Time: 0.5LSB/div Small Signal Settling Time: 0.5LSB/div Large Signal Settling Time: 5V/div +5V LDAC 0 +5V LDAC 0 Time (2µs/div) Time (2µs/div) ® DAC7724, 7725 10 TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.) At TA = +25°C, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, VREFL = –10V, representative unit, unless otherwise specified. DUAL SUPPLY CURRENT LIMIT vs INPUT CODE SHORT TO GROUND POWER SUPPLY REJECTION RATIO vs FREQUENCY 0 –10 –20 20 15 5 PSRR (dB) IOUT (mA) 10 0 –5 –15V +15V –80 –90 –100 –110 –120 –10 –15 200H 400H 600H 800H A00H C00H +5V 101 E00H FFFH 102 103 104 OUTPUT VOLTAGE MID-SCALE GLITCH PERFORMANCE BROADBAND NOISE 7FFH to 800H Noise Voltage (500µV/div) Digital Input Code Frequency (Hz) Output Voltage (200mV/div) –20 000H –30 –40 –50 –60 –70 800H to 7FFH 106 BW = 1MHz Code = 800H +5V LDAC 0 Time (1µs/div) 105 Time (1ms/div) OUTPUT NOISE vs FREQUENCY DATA BUS FEEDTHROUGH GLITCH Output Voltage (20mV/div) Noise (nV/√Hz) 1000 100 Noise at any code +5V DATA BUS 0 10 0 0.1 1 10 100 Frequency (kHz) 1000 10000 Time (0.5µs/div) ® 11 DAC7724, 7725 THEORY OF OPERATION output (“full-scale”) are set by the external voltage references (VREFL and VREFH, respectively). The digital input is a 12-bit parallel word and the DAC input registers offer a readback capability. The converters can be powered from a single +15V supply or a dual ±15V supply. Each device offers a reset function which immediately sets all DAC registers and DAC output voltages to mid-scale (DAC7724, code 800H) or to zero-scale (DAC7725, code 000H). See Figures 2 and 3 for the basic operation of the DAC7724/25. The DAC7724 and DAC7725 are quad voltage output, 12-bit digital-to-analog converters (DACs). The architecture is a classic R-2R ladder configuration followed by an operational amplifier that serves as a buffer, as shown in Figure 1. Each DAC has its own R-2R ladder network and output opamp, but all share the reference voltage inputs. The minimum voltage output (“zero-scale”) and maximum voltage RF R R 2R 2R R 2R 2R R 2R R R 2R VOUT R 2R 2R 2R VREFH VREFL FIGURE 1. DAC7724/25 Architecture. DAC7724 DAC7725 +10.00V 0.1µF +15V 1 VREFH VREFL 28 2 VOUTB VOUTC 27 3 VOUTA VOUTD 26 4 VSS VCC 25 5 GND VDD 24 Reset DACs(1) 6 RESET CS 23 Chip Select Load DAC Registers 7 LDAC A0 22 8 DB0 A1 21 Address Bus or Decoder 9 DB1 R/W 20 10 DB2 DB11 19 11 DB3 DB10 18 12 DB4 DB9 17 13 DB5 DB8 16 14 DB6 DB7 15 0V to +10V 0V to +10V Data Bus 0V to +10V 0.1µF +5V Read/Write Data Bus NOTE: (1) Reset LOW sets all DACs to code 800H on the DAC7724 and to code 000H on the DAC7725. ® DAC7724, 7725 12 1µF to 10µF 0V to +10V 0.1µF FIGURE 2. Basic Single-Supply Operation of the DAC7724/25. + + 1µF to 10µF DAC7724 DAC7725 +10.000V –10.000V 0.1µF –10V to +10V –15V + –10V to +10V 1µF to 10µF 0.1µF +15V 1 VREFH VREFL 28 2 VOUTB VOUTC 27 –10V to +10V 3 VOUTA VOUTD 26 –10V to +10V 4 VSS VCC 25 VDD 24 0.1µF + 1µF to 10µF +5V 0.1µF 5 GND DACs(1) 6 RESET CS 23 Chip Select Load DAC Registers 7 LDAC A0 22 8 DB0 A1 21 Address Bus or Decoder 9 DB1 R/W 20 10 DB2 DB11 19 11 DB3 DB10 18 12 DB4 DB9 17 13 DB5 DB8 16 14 DB6 DB7 15 Reset Data Bus 0.1µF + 1µF to 10µF Read/Write Data Bus NOTE: (1) Reset LOW sets all DACs to code 800H on the DAC7724 and to code 000H on the DAC7725. FIGURE 3. Basic Dual-Supply Operation of the DAC7724/25. ANALOG OUTPUTS tially, the offset of the output op-amp). The maximum output is equal to VREFH plus a similar offset voltage. Note that VSS (the negative power supply) must either be connected to ground or must be in the range of –14.25V to –15.75V. The voltage on VSS sets several bias points within the converter, if VSS is not in one of these two configurations, the bias values may be in error and proper operation of the device is not guaranteed. When VSS = –15V (dual supply operation), the output amplifier can swing to within 4V of the supply rails, guaranteed over the –40°C to +85°C temperature range. With VSS = 0V (single-supply operation) and RLOAD connected to ground, the output can swing to ground. Note that the settling time of the output op-amp will be longer with voltages very near ground. Additionally, care must be taken when measuring the zero-scale error when VSS = 0V. Since the output voltage cannot swing below ground, the output voltage may not change for the first few digital input codes (000H, 001H, 002H, etc.) if the output amplifier has a negative offset. At the negative offset limit of –4 LSB (-9.76mV), for the single-supply case, the first specified output starts at code 004H. The current into the VREFH input and out of VREFL depends on the DAC output voltages and can vary from a few microamps to approximately 0.3mA. The reference input appears as a varying load to the reference. If the reference can sink or source the required current, a reference buffer is not required. See “Reference Current vs Code” in the Typical Performance Curves. The analog supplies (or the analog supplies and the reference power supplies) have to come up first. If the power supplies for the references come up first, then the VCC and VSS supplies will be “powered from the reference via the ESD protection diodes” (see page 4). REFERENCE INPUTS For dual-supply operation, the reference inputs, VREFL and VREFH, can be any voltage between VSS + 4V and VCC – 4V provided that VREFH is at least 1.25V greater than VREFL. For single-supply operation (VSS = 0V), VREFL value can be above 0V, with the same provision that VREFH is at least 1.25V greater than VREFL. The minimum output of each DAC is equal to VREFL plus a small offset voltage (essen- Bypassing the reference voltage or voltages with at least a 0.1uF capacitor placed as close to the DAC7724/25 package is strongly recommended. ® 13 DAC7724, 7725 DIGITAL INTERFACE The double buffered architecture is mainly designed so that each DAC Input Register can be written at any time and then all DAC output voltages updated simultaneously by pulling LDAC LOW. It also allows a DAC Input Register to be written to at any point and the DAC voltage to be synchronously changed via a trigger signal connected to LDAC. Table I shows the basic control logic for the DAC7724/25. Note that each internal register is level triggered and not edge triggered. When the appropriate signal is LOW, the register becomes transparent. When this signal is returned HIGH, the digital word currently in the register is latched. The first set of registers (the Input Registers) are triggered via the A0, A1, R/W, and CS inputs. Only one of these registers is transparent at any given time. The second set of registers (the DAC Registers) are all transparent when LDAC input is pulled LOW. DIGITAL TIMING Figure 4 and Table II provide detailed timing for the digital interface of the DAC7724 and DAC7725. DIGITAL INPUT CODING The DAC7724 and DAC7725 input data is in straight binary format. The output voltage is given by the following equation: – V REFL ) • N (V V OUT = V REFL + REFH 4096 Each DAC can be updated independently by writing to the appropriate Input Register and then updating the DAC Register. Alternatively, the entire DAC Register set can be configured as always transparent by keeping LDAC LOW— the DAC update will occur when the Input Register is written. where N is the digital input code. This equation does not include the effects of offset (zero-scale) errors. A1 A0 L(1) L H L H L H L H L H L H X X X L H H L L H H L L H H X(3) X X R/W L L L L L L L L H H H H X X X CS RESET LDAC SELECTED INPUT REGISTER L L L L L L L L L L L L H H X H(2) L L L L H H H H H H H H L H X A B C D A B C D A B C D NONE NONE ALL H H H H H H H H H H H H H L STATE OF SELECTED INPUT REGISTER STATE OF ALL DAC REGISTERS Transparent Transparent Transparent Transparent Transparent Transparent Transparent Transparent Readback Readback Readback Readback (All Latched) (All Latched) Reset(4) Transparent Transparent Transparent Transparent Latched Latched Latched Latched Latched Latched Latched Latched Transparent Latched Reset(4) NOTES: (1) L = Logic LOW. (2) H= Logic HIGH. (3) X = Don’t Care. (4) DAC7724 resets to 800H, DAC7725 resets to 000H. When RESET rises, all registers that are in their latched state retain the reset value. TABLE I. DAC7724 and DAC7725 Control Logic Truth Table. ® DAC7724, 7725 14 tLD tWCS CS tWS tWH tAS tAH R/W tRCS CS A0/A1 tRDH tRDS tLWD R/W tAH tAS LDAC ±0.012% of FSR Error Band tDH tDS A0/A1 Data In tDZ tS Data Valid Data Out tCSD VOUT Data Read Timing Data Write Timing ±0.012% of FSR Error Band tRESET RESET tS +FS ±0.012% of FSR Error Band VOUT, DAC7725 –FS +FS VOUT, DAC7724 Mid-Scale –FS ±0.012% of FSR Error Band DAC7724/25 Reset Timing FIGURE 4. Digital Input and Output Timing. SYMBOL DESCRIPTION MIN tRCS tRDS tRDH tDZ tCSD tWCS tWS tWH tAS t AH t LD t DS tDH tLWD CS LOW for Read R/W HIGH to CS LOW R/W HIGH after CS HIGH CS HIGH to Data Bus in High Impedance CS LOW to Data Bus Valid CS LOW for Write R/W LOW to CS LOW R/W LOW after CS HIGH Address Valid to CS LOW Address Valid after CS HIGH LDAC Delay from CS HIGH Data Valid to CS LOW Data Valid after CS HIGH LDAC LOW RESET LOW Time Settling Time 200 10 10 tRESET tS TYP 100 100 MAX 160 50 0 0 0 0 10 0 0 50 50 10 UNITS ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns µs TABLE II. Timing Specifications (TA = –40°C to +85°C). ® 15 DAC7724, 7725 PACKAGE OPTION ADDENDUM www.ti.com 24-Aug-2014 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) DAC7724N ACTIVE PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7724N DAC7724N/750 ACTIVE PLCC FN 28 750 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7724N DAC7724NB ACTIVE PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7724N B DAC7724NB/750 ACTIVE PLCC FN 28 750 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7724N B DAC7724NB/750G4 ACTIVE PLCC FN 28 750 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7724N B DAC7724NBG4 ACTIVE PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7724N B DAC7724U ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7724U B DAC7724U/1K ACTIVE SOIC DW 28 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7724U B DAC7724UB ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7724U B DAC7724UB/1K ACTIVE SOIC DW 28 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7724U B DAC7724UBG4 ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7724U B DAC7724UG4 ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7724U B DAC7725N ACTIVE PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7725N DAC7725NB ACTIVE PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7725N B DAC7725NB/750 ACTIVE PLCC FN 28 750 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7725N B DAC7725NB/750G4 ACTIVE PLCC FN 28 750 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7725N B DAC7725NBG4 ACTIVE PLCC FN 28 37 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-245C-168 HR -40 to 85 DAC7725N B Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 24-Aug-2014 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) DAC7725U ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7725U B DAC7725UB ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7725U B DAC7725UB/1K ACTIVE SOIC DW 28 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7725U B DAC7725UB/1KG4 ACTIVE SOIC DW 28 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7725U B DAC7725UBG4 ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7725U B DAC7725UG4 ACTIVE SOIC DW 28 20 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR -40 to 85 DAC7725U B (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 24-Aug-2014 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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Addendum-Page 3 PACKAGE MATERIALS INFORMATION www.ti.com 18-Aug-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing DAC7724N/750 PLCC FN 28 DAC7724NB/750 DAC7724U/1K PLCC FN SOIC DW DAC7724UB/1K SOIC DAC7725NB/750 DAC7725UB/1K SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 750 330.0 24.4 12.95 12.95 5.0 16.0 24.0 Q1 28 750 330.0 24.4 12.95 12.95 5.0 16.0 24.0 Q1 28 1000 330.0 32.4 11.35 18.67 3.1 16.0 32.0 Q1 DW 28 1000 330.0 32.4 11.35 18.67 3.1 16.0 32.0 Q1 PLCC FN 28 750 330.0 24.4 12.95 12.95 5.0 16.0 24.0 Q1 SOIC DW 28 1000 330.0 32.4 11.35 18.67 3.1 16.0 32.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 18-Aug-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DAC7724N/750 PLCC FN 28 750 346.0 346.0 41.0 DAC7724NB/750 PLCC FN 28 750 346.0 346.0 41.0 DAC7724U/1K SOIC DW 28 1000 367.0 367.0 55.0 DAC7724UB/1K SOIC DW 28 1000 367.0 367.0 55.0 DAC7725NB/750 PLCC FN 28 750 346.0 346.0 41.0 DAC7725UB/1K SOIC DW 28 1000 367.0 367.0 55.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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