LTC2655 Linear Technology, LTC2655 Datasheet
LTC2655
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LTC2655 Summary of contents
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... The parts use the 2-wire I The LTC2655 operates in both the standard mode (maxi- mum clock rate of 100kHz) and the fast mode (maximum clock rate of 400kHz). The LTC2655 incorporates a power-on reset circuit that is controlled by the PORSEL pin ...
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... Lead Temperature, GN Only (Soldering, 10 sec).... 300°C TOP VIEW 16 GND OUTD 13 V OUTC 12 PORSEL 11 CA0 10 CA1 9 SDA = 110°C/W JA LTC2655C ................................................ 0°C to 70°C LTC2655I .............................................–40°C to 85°C TOP VIEW OUTA REFCOMP OUTB GND REFIN/OUT 4 12 LDAC 11 5 ...
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... FULL-SCALE VOLTAGE, INTERNAL REFERENCE MODE 4.096V PACKAGE TYPE UF = 20-Lead (4mm × 4mm) Plastic QFN GN = 16-Lead Narrow SSOP TEMPERATURE GRADE C = Commercial Temperature Range (0°C to 70° Industrial Temperature Range (–40°C to 85°C) ELECTRICAL GRADE (OPTIONAL ±4LSB Maximum INL (16-Bit) PRODUCT PART NUMBER LTC2655 2655f 3 ...
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... DataSheet.in LTC2655 PRODUCT SELECTION GUIDE LEAD FREE FINISH TAPE AND REEL LTC2655BCGN-L16#PBF LTC2655BCGN-L16#TRPBF LTC2655BIGN-L16#PBF LTC2655BIGN-L16#TRPBF LTC2655BCUF-L16#PBF LTC2655BCUF-L16#TRPBF LTC2655BIUF-L16#PBF LTC2655BIUF-L16#TRPBF LTC2655BCGN-H16#PBF LTC2655BCGN-H16#TRPBF 655H16 LTC2655BIGN-H16#PBF LTC2655BIGN-H16#TRPBF LTC2655BCUF-H16#PBF LTC2655BCUF-H16#TRPBF LTC2655BIUF-H16#PBF LTC2655BIUF-H16#TRPBF LTC2655CGN-L12#PBF LTC2655CGN-L12#TRPBF LTC2655IGN-L12#PBF LTC2655IGN-L12#TRPBF LTC2655CUF-L12#PBF LTC2655CUF-L12#TRPBF LTC2655IUF-L12#PBF LTC2655IUF-L12#TRPBF LTC2655CGN-H12#PBF LTC2655CGN-H12#TRPBF LTC2655IGN-H12#PBF LTC2655IGN-H12#TRPBF LTC2655CUF-H12#PBF ...
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... DataSheet.in ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2655B-L16/ LTC2655-L12 (Internal Reference=1.25V) SYMBOL PARAMETER DC Performance Resolution Monotonicity DNL Differential Nonlinearity INL Integral Nonlinearity (Note 3) Load Regulation ZSE Zero-Scale Error V Offset Error OS V Temperature Coeffi cient OS GE Gain Error Gain Temperature Coeffi ...
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... DataSheet.in LTC2655 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2655B-L16/LTC2655-L12 (Internal Reference = 1.25V) SYMBOL PARAMETER Reference Reference Output Voltage Reference Temperature Coeffi cient Reference Line Regulation Reference Short-Circuit Current REFCOMP Pin Short-Circuit Current Reference Load Regulation Reference Output Voltage Noise Density ...
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... DataSheet.in ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2655B-H16/LTC2655-H12 (Internal Reference = 2.048V) SYMBOL PARAMETER DC Performance Resolution Monotonicity DNL Differential Nonlinearity INL Integral Nonlinearity (Note 3) Load Regulation ZSE Zero-Scale Error V Offset Error OS V Temperature Coeffi cient OS GE Gain Error Gain Temperature Coeffi ...
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... DataSheet.in LTC2655 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2655B-H16/LTC2655-H12 (Internal Reference = 2.048V) SYMBOL PARAMETER Reference Reference Output Voltage Reference Temperature Coeffi cient Reference Line Regulation Reference Short-Circuit Current REFCOMP Pin Short-Circuit Current Reference Load Regulation Reference Output Voltage Noise Density ...
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... LDAC High or Low Transition LDAC Low Pulse Width t2 The l denotes the specifi cations which apply over the full operating = 25° 2.7V to 5.5V (LTC2655B-L16/LTC2655-L12 unloaded unless otherwise specifi ed. OUT CONDITIONS ±0.024%(±1LSB at 12 Bits) ±0.0015%(±1LSB at 16 Bits) ± ...
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... N = 16, k REF defi ned from code 128 to code 65535. For V and linearity is defi ned from code 8 to code 4095. Note 4: Inferred from measurement at code 128 (LTC2655-16), or code 8 (LTC2655-12). Note 5: DC Crosstalk is measured with V reference, with the measured DAC at mid-scale. ...
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... TEMPERATURE (°C) 2655 G03 V 200μV/DIV 1/4 SCALE TO 3/4 SCALE STEP 2.50V CC FS 7.8μs SCL 3V/DIV 2655 G06 2μs/DIV LTC2655 T = 25°C unless otherwise noted. A Differential Nonlinearity (DNL) 1 0.5 0 128 16384 32768 49152 65535 CODE 2655 G02 ...
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... DataSheet.in LTC2655 TYPICAL PERFORMANCE CHARACTERISTICS LTC2655-H16 Integral Nonlinearity (INL –1 –2 –3 –4 128 16384 INL vs Temperature INL(POS –1 –2 INL(NEG) –3 –4 –50 –30 – TEMPERATURE (°C) Settling to ±1LSB Rising SCL ...
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... TO 1/4 SCALE STEP V R AVERAGE OF 2048 EVENTS 3072 4095 2μs/DIV 2655 G16 Headroom at Rails vs Output Current 5.0 5V (LTC2655-H) SOURCING 4.5 4.0 3.5 3V (LTC2655-L) SOURCING 3.0 2.5 2.0 1.5 5V (LTC2655-H) SINKING 1 (LTC2655-H) 0.5 3V (LTC2655-L) SINKING = 3V (LTC2655- OUT 2655 G19 Gain Error vs Temperature 64 LTC2655- – ...
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... TEMPERATURE (°C) 2655 G28 Mid-Scale Glitch Impulse 9TH CLOCK OF SCL 3RD DATA BYTE 5V/DIV LTC2655-H16 OUT 7nV-s TYP 5mV/DIV LTC2655-L16 4nV-s TYP 2655 G31 2μs/DIV CC 4.5 5 5.5 2655 G26 LTC2655-H ...
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... OUT 0.5mV/DIV LTC2655-L16 REFCOMP Power-On Reset to Mid-Scale LTC2655 2V/DIV V OUT 1V/DIV DAC Output 0.1Hz to 10Hz Voltage Noise V = 5V, LTC2655-H CC CODE = MID-SCALE INTERNAL REF C REFCOMP 5μV/DIV 10mV/DIV = 5V, 0.4nV•s TYP 0.22μF REFOUT 2655 G33 2μs/DIV 2655 G35 ...
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... DataSheet.in LTC2655 PIN FUNCTIONS REFLO (Pin 1/Pin 20): Reference Low. The voltage at this pin sets the zero-scale voltage of all DACs. This pin should be tied to GND (Pins 2,4,13,14/Pins 1, 3, 13, 14): DAC OUTA OUTD Analog Voltage Outputs. The output range times the voltage at the REFIN/OUT pin ...
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... DataSheet.in BLOCK DIAGRAM REFCOMP GND REFLO V OUTA V OUTB CA0 CA1 CA2 SCL LDAC INTERNAL REFERENCE DAC A DAC B 32-BIT SHIFT REGISTER 2-WIRE INTERFACE LTC2655 REFIN/OUT OUTD DAC D V OUTC DAC C PORSEL POWER-ON RESET SDA 2655 BD 2655f 17 ...
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... DataSheet.in LTC2655 TEST CIRCUITS TIMING DIAGRAM SDA LOW SCL t HD(STA) S ALL VOLTAGE LEVELS REFER Test Circuit 1 100Ω CAn V /V IH(CA ) IL( 2655 TC01 Test Circuit INH INL INF 2655 TC02 GND SU(DAT SU(STA) ...
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... DataSheet.in OPERATION The LTC2655 is a family of quad voltage output DACs in 20-lead 4mm × 4mm QFN and in 16-lead narrow SSOP packages. Each DAC can operate rail-to-rail in external reference mode, or with its full-scale voltage set by an integrated reference. Four combinations of accuracy (16-bit and 12-bit), and full-scale voltage (2 ...
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... Table 2. In addition to the address selected by the address pins, the parts also respond to a global address. This address allows a common write to all LTC2655 parts to be accom- plished with one 3-byte write transaction on the I 20 The global address is a 7-bit on-chip hardwired address and is not selectable by CA0, CA1 and CA2 ...
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... The master initiates communication with the LTC2655 with a START condition and a 7-bit slave address followed by the Write bit ( The LTC2655 acknowledges by pulling the SDA pin low at the 9th clock if the 7-bit slave address matches the address of the part (set by CA0, CA1 and CA2) or the global address ...
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... Power Supply Sequencing and Start-Up Sections. 22 Integrated Reference Buffers Each of the four DACs in LTC2655 has its own integrated high performance reference buffer. The buffers have very high input impedance and do not load the reference volt- age source. These buffers shield the reference voltage from glitches caused by DAC switching and thus minimize DAC-to-DAC dynamic crosstalk. By tying 0.22μ ...
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... V as shown in Figure 3c. No full-scale limiting can CC occur if V ≤ (V – F )/2. REFIN/OUT CC SE Offset and linearity are defi ned and tested over the region of the DAC transfer function where no output limiting can occur. LTC2655 2655f 23 ...
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... DataSheet.in LTC2655 OPERATION 24 2655f ...
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... Figure 3. Effects of Rail-to-Rail Operation On a DAC Transfer Curve. (a) Overall Transfer Function, (b) Effect of Negative Offset for Codes Near Zero-Scale, (c) Effect of Positive Full-Scale Error for Codes Near Full-Scale REF CC OUTPUT VOLTAGE 0 32, 768 65, 535 INPUT CODE (a) LTC2655 POSITIVE FSE REF CC OUTPUT VOLTAGE INPUT CODE (c) 2655 F03 2655f ...
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... DataSheet.in LTC2655 PACKAGE DESCRIPTION .254 MIN .0165 ± .0015 RECOMMENDED SOLDER PAD LAYOUT .007 – .0098 (0.178 – 0.249) NOTE: 1. CONTROLLING DIMENSION: INCHES 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" ...
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... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC2655 BOTTOM VIEW—EXPOSED PAD 0.115 ...
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... 0.1μF C3 LTC6240IS5 0.1μF 4 – REFCOMP REFIN/OUT DNC DNC OUTA 3 V OUTB LTC2655IUF-L16 OUTC 14 V OUTD PORSEL DNC DNC COMMENTS DACs 250μA per DAC, 2.7V to 5.5V Supply Range, Rail-to-Rail Output with OUT Separate V ...