DAC7744 ® DAC 774 4 For most current data sheet and other product information, visit www.burr-brown.com 16-Bit, Quad Voltage Output DIGITAL-TO-ANALOG CONVERTER FEATURES DESCRIPTION ● LOW POWER: 200mW ● UNIPOLAR OR BIPOLAR OPERATION ● SINGLE-SUPPLY OUTPUT RANGE: +10V ● DUAL SUPPLY OUTPUT RANGE: ±10V ● SETTLING TIME: 10µs to 0.
SPECIFICATIONS (Dual Supply) At TA = TMIN to TMAX, VCC = +15V, VDD = +5V, VSS = –15V, VREFH = +10V, and VREFL = –10V, unless otherwise noted.
SPECIFICATIONS (Single Supply) At TA = TMIN to TMAX, VCC = +15V, VDD = +5V, VSS = GND, VREFH = +10V, and VREFL = +50mV, unless otherwise noted.
ELECTROSTATIC DISCHARGE SENSITIVITY ABSOLUTE MAXIMUM RATINGS(1) VCC to VSS ........................................................................... –0.3V to +32V VCC to AGND ...................................................................... –0.3V to +16V VSS to AGND ...................................................................... +0.3V to –16V AGND to DGND ................................................................. –0.3V to +0.3V VREFH to AGND ............................................
PIN DESCRIPTIONS PIN CONFIGURATION Top View SSOP PIN NAME DESCRIPTION 1 DB15 Data Bit 15, MSB 2 DB14 Data Bit 14 3 DB13 Data Bit 13 DB15 (MSB) 1 48 NC 4 DB12 Data Bit 12 DB14 2 47 NC 5 DB11 Data Bit 11 6 DB10 Data Bit 10 7 DB9 Data Bit 9 Data Bit 8 DB13 3 46 NC DB12 4 45 NC 8 DB8 VOUTA Sense 9 DB7 Data Bit 7 10 DB6 Data Bit 6 DB11 5 44 DB10 6 43 VOUTA 11 DB5 Data Bit 5 DB9 7 42 VREFL AB Sense 12 DB4 Data Bit 4 13 DB3 Data Bit 3 14 DB2
TYPICAL PERFORMANCE CURVES: VSS = 0V At TA = +25°C, VDD = +5V, VCC = +15V, VSS = 0, VREFH = +10V, and VREFL = 0V, representative unit, unless otherwise specified. +25°C LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC B, +25°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 DLE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = 0, VREFH = +10V, and VREFL = 0V, representative unit, unless otherwise specified. +85°C (cont.) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC D, +85°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH DLE (LSB) DLE (LSB) LE (LSB) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC C, +85°C) 2.
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = 0, VREFH = +10V, and VREFL = 0V, representative unit, unless otherwise specified. ZERO-SCALE ERROR vs TEMPERATURE FULL-SCALE ERROR vs TEMPERATURE 2 Code (FFFFH) Code (0021 (0040H) DAC B Positive Full-Scale Error (mV) Zero-Scale Error (mV) 1.5 2 DAC D 1 0.5 0 –0.5 DAC A DAC C –1 –1.5 –2 0 10 20 30 40 50 60 70 80 DAC D 1 0.5 0 –0.5 DAC A DAC C –1 –1.
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = 0, VREFH = +10V, and VREFL = 0V, representative unit, unless otherwise specified.
TYPICAL PERFORMANCE CURVES: VSS = 0V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = 0, VREFH = +10V, and VREFL = 0V, representative unit, unless otherwise specified. LOGIC SUPPLY CURRENT vs LOGIC INPUT LEVEL FOR DATA BITS OUTPUT VOLTAGE vs RLOAD 16 14 10 12 Source 8 VOUT (V) Logic Supply Current (mA) 12 6 4 10 8 6 4 2 2 Sink 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 0 0.01 5 0.
TYPICAL PERFORMANCE CURVES: VSS = –15V At TA = +25°C, VDD = +5V, VCC = +15V, VSS = –15V, VREFH = +10V, and VREFL = –10V, representative unit, unless otherwise specified. LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC A, +25°C) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC B, +25°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH DLE (LSB) DLE (LSB) LE (LSB) +25°C 2.0 1.5 1.0 0.
TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = –15V, VREFH = +10V, and VREFL = –10V, representative unit, unless otherwise specified. +85°C (cont.) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC D, +85°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.
TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = –15V, VREFH = +10V, and VREFL = –10V, representative unit, unless otherwise specified. CURRENT vs CODE All DACs Sent to Indicated Code (DAC A and B) VREFH VREF Current (mA) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 VREF Current (mA) VREF Current (mA) VREFL 0.5 0 –0.5 –1.0 –1.5 –2.0 –2.5 –3.0 0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH VREFL 0.5 0 –0.5 –1.0 –1.5 –2.0 –2.5 –3.
TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = –15V, VREFH = +10V, and VREFL = –10V, representative unit, unless otherwise specified. SUPPLY CURRENT vs CODE OUTPUT VOLTAGE vs RLOAD 15 10 Source (mA) VOUT (V) 5 0 –5 Sink –10 –15 0.01 0.
TYPICAL PERFORMANCE CURVES: VSS = –15V (Cont.) At TA = +25°C, VDD = +5V, VCC = +15V, VSS = –15V, VREFH = +10V, and VREFL = –10V, representative unit, unless otherwise specified.
THEORY OF OPERATION by the external voltage references (VREFL and VREFH, respectively). The digital input is a 16-bit parallel word and the DAC input registers offer a readback capability. The converters can be powered from either a single +15V supply or a dual ±15V supply. The device offers a reset function which immediately sets all DAC output voltages and DAC registers to mid-scale code 8000H or to zero scale, code 0000H. See Figures 2 and 3 for the basic operation of the DAC7744.
Data Bus 1 DB15 (MSB) NC 48 2 DB14 NC 47 3 DB13 NC 46 4 DB12 NC 45 5 DB11 VOUTA Sense 44 6 DB10 VOUTA 43 7 DB9 VREFL AB Sense 42 8 DB8 VREFL AB 41 –10V 9 DB7 VREFH AB 40 +10V 10 DB6 VREFH AB Sense 39 11 DB5 VOUTB Sense 38 12 DB4 VOUTB 37 13 DB3 VOUTC Sense 36 14 DB2 VOUTC 35 15 DB1 VREFH CD Sense 34 DAC7744 –10V to +10V –10V to +10V –10V to +10V 16 DB0 (LSB) VREFH CD 33 +10V +5V 17 RSTSEL VREFL CD 32 –10V Reset DACs 18 RST VREF
REFERENCE INPUTS 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. The minimum output of each DAC is equal to VREFL plus a small offset voltage (essentially, 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.
LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC B, +25°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 1.0 0.5 0.5 0 –0.5 0 –0.5 –1.0 0000H 2000H 4000H 6000H 8000H A000H C000H E000H FFFFH Digital Input Code Digital Input Code LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC C, +25°C) LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC D, +25°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 1.0 1.0 0.5 0.
NC 48 NC 47 NC 46 NC 45 VOUTA Sense 44 VOUTA 43 VREFL AB Sense 42 VREFL AB 41 VREFH AB 40 VREFH AB Sense 39 DAC7744 +V VOUT 1kΩ 100Ω 2200pF OPA350 1000pF VOUTB Sense 38 VOUTB 37 0.05V 100Ω 99kΩ 1000pF 2200pF +V OPA227 +5V VOUT FIGURE 9. Single-Supply Buffered Reference with a Reference Low of 50mV and Reference High of +5V. LINEARITY ERROR AND DIFFERENTIAL LINEARITY ERROR vs CODE (DAC B, +25°C) LE (LSB) 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 1.0 0.5 0.5 0 –0.
A1 A0 R/W CS RST L L H H L L H H X X X X L H L H L H L H X X X X L L L L H H H H X X X X L L L L L L L L H H X X X X X X X X X X X X ↑ ↑ RSTSEL LOADDACS X X X X X X X X X X L H X X X X X X X X ↑ H X X INPUT REGISTER DAC REGISTER MODE DAC Write Write Write Write Read Read Read Read Hold Hold Hold Hold Hold Hold Hold Hold Hold Hold Write Hold Reset to Zero Reset to Midscale Write Input Write Input Write Input Write Input Read Input Read Input Read Input Read Input Update Hold Reset to Zero R
tWCS CS tRCS CS tRDH tRDS tWS tWH tAS tAH R/W A0/A1 R/W tLS tLH tLWD tAH tAS tLX LOADDACS A0/A1 tDZ ±0.003% of FSR Error Band tDH tDS Data In tS Data Valid Data Out tCSD VOUT Data Read Timing Data Write Timing tSS ±0.003% of FSR Error Band tSH RESET SEL tRSH tRSS RST +FS VOUT,RESET SEL LOW –FS +FS VOUT,RESET SEL HIGH MS –FS DAC7744 Reset Timing FIGURE 11. Digital Input and Output Timing.
IOUT VPROGRAMMED DAC7744 NC 48 NC 47 NC 46 NC 45 VOUTA Sense 44 VOUTA 43 VREFL AB Sense 42 VREFL AB 41 VREFH AB 40 VREFH AB Sense 39 RSENSE 250Ω +V OPA2350 100Ω 20kΩ 2200pF 1000pF VOUTB Sense 38 VOUTB 37 +1.0V 100Ω 80kΩ 1000pF 2200pF +V IOUT VPROGRAMMED RSENSE 250Ω GND FIGURE 12. 4-to-20mA Digitally-Controlled Current Source (1/2 DAC7744).
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PACKAGE OPTION ADDENDUM www.ti.com 29-Sep-2013 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.
PACKAGE MATERIALS INFORMATION www.ti.com 28-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant DAC7744E/1K SSOP DL 48 1000 330.0 32.4 11.35 16.2 3.1 16.0 32.0 Q1 DAC7744EB/1K SSOP DL 48 1000 330.0 32.4 11.35 16.2 3.1 16.0 32.0 Q1 DAC7744EC/1K SSOP DL 48 1000 330.0 32.4 11.35 16.2 3.1 16.0 32.
PACKAGE MATERIALS INFORMATION www.ti.com 28-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DAC7744E/1K SSOP DL 48 1000 367.0 367.0 55.0 DAC7744EB/1K SSOP DL 48 1000 367.0 367.0 55.0 DAC7744EC/1K SSOP DL 48 1000 367.0 367.0 55.
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