LTC2656 Linear Technology Corporation, LTC2656 Datasheet
LTC2656
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LTC2656 Summary of contents
Page 1
... LTC2656-L has a full-scale output of 2.5V with the integrated 10ppm/°C reference and operates from a single 2.7V to 5.5V supply. The LTC2656-H has a full-scale output of 4.096V with the integrated refer- ence and operates from a 4.5V to 5.5V supply. Each DAC can also operate with an external reference, which sets the DAC full-scale output to two times the external reference voltage ...
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... CC CS/LD, SCK, SDI, LDAC, CLR, REFLO .......... –0. ................. –0.3V to Min(V OUTA OUTH REFIN/OUT, REFCOMP ...... –0.3V to Min(V PORSEL, SDO ................... –0.3V to Min(V Operating Temperature Range LTC2656C ................................................ 0°C to 70°C LTC2656I.............................................. –40°C to 85°C PIN CONFIGURATION TOP VIEW REFLO OUTA V 3 ...
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... PRODUCT SELECTOR GUIDE LTC2656 B C UFD -L 16 Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/ ...
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... LTC2656IFE-L12#TRPBF LTC2656CUFD-L12#PBF LTC2656CUFD-L12#TRPBF LTC2656IUFD-L12#PBF LTC2656IUFD-L12#TRPBF LTC2656CFE-H12#PBF LTC2656CFE-H12#TRPBF LTC2656IFE-H12#PBF LTC2656IFE-H12#TRPBF LTC2656CUFD-H12#PBF LTC2656CUFD-H12#TRPBF LTC2656IUFD-H12#PBF LTC2656IUFD-H12#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container.Consult LTC Marketing for information on non-standard lead based fi nish parts. ...
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... ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2656B-L16/LTC2656-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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... LTC2656 www.DataSheet4U.com ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2656B-L16/LTC2656-L12 (internal reference = 1.25V) SYMBOL PARAMETER Reference Input Range Reference Input Current Reference Input Capacitance (Note 9) Power Supply V Positive Supply Voltage CC I Supply Current (Note Supply Current in Shutdown Mode ...
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... ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2656B-H16/LTC2656-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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... LTC2656 www.DataSheet4U.com ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T LTC2656B-H16/LTC2656-H12 (internal reference = 2.048V) SYMBOL PARAMETER Power Supply V Positive Supply Voltage CC I Supply Current (Note Supply Current in Shutdown Mode SHDN (Note 8) Digital I/O V Digital Input High Voltage IH V Digital Input Low Voltage ...
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... 128 and REF linearity is defi ned from code 128 to code 65535. For 12 and linearity is defi ned from code 8 to code 4,095. Note 4: Inferred from measurement at code 128 (LTC2656-16) or code 8 (LTC2656-12). Note 5: DC crosstalk is measured with V CC reference with the measured DAC at mid-scale ...
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... G04 100μV/DIV 8.9μs 1/4 SCALE TO 3/4 SCALE STEP 200pF L L AVERAGE OF 2048 EVENTS 2μs/DIV 2656 G06 LTC2656-L16 INL vs Temperature INL (POS INL (NEG) –1 –2 –3 –4 49152 65535 –50 –30 30 – ...
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... G11 250μV/DIV 7.9μ 2k 200pF L L AVERAGE OF 2048 5V/DIV EVENTS 2μs/DIV 2656 G13 LTC2656 LTC2656-H16 INL vs Temperature INL (POS INL (NEG) –1 –2 –3 – 65535 –50 –30 – ...
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... TEMPERATURE (°C) 12 Differential Nonlinearity (DNL) 1 2.048V REF 0.5 0 –0.5 –1.0 4095 8 2048 1024 CODE 2656 G15 Current Limiting 0. (LTC2656- (LTC2656-L) 0.15 CC INTERNAL REF. 0.10 CODE = MID-SCALE 0.05 0 –0.05 –0.10 –0.15 –0. –50 –40 –30 –20 – (mA) ...
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... CODE = FULL-SCALE V OUT 1V/DIV CLR 5V/DIV 1μs/DIV 2656 G28 Mid-Scale Glitch Impulse CS/LD 5V/DIV V V OUT 5mV/DIV V V OUT 5mV/DIV 2μs/DIV 2656 G31 5.5 4.5 5.0 2656 G26 = 2.048V REF 2656 G29 = 5V, 6nV•s TYP CC (LTC2656-H16) = 3V, 3nV•s TYP CC (LTC2656-L16) 2656 G32 2656p 13 ...
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... TYPICAL PERFORMANCE CHARACTERISTICS DAC-to-DAC Crosstalk (Dynamic) ONE DAC SWITCH 0-FS 2V/DIV LTC2656-H16 5V, 3nV•s TYP LOAD REFCOMP REFOUT V OUT 2mV/DIV LTC2656-H16 5V, <1nV•s TYP 0.1μF REFCOMP REFOUT V OUT 2mV/DIV 2μs/DIV Noise Voltage vs Frequency 1200 ...
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... TTL compatible. SDI (Pin 11/Pin 9): Serial Interface Data Input. Data is applied to SDI for transfer to the device at the rising edge of SCK (Pin 10). The LTC2656 accepts input word lengths of either bits. SDO (Pin 12/Pin 10): Serial Interface Data Output. This pin is used for daisy-chain operation. The serial output of the shift register appears at the SDO pin ...
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... LTC2656 www.DataSheet4U.com BLOCK DIAGRAM REFCOMP GND REFLO V OUTA V OUTB V OUTC V OUTD CS/LD SCK LDAC TIMING DIAGRAMS SCK SDI t 5 CS/LD SDO LDAC 16 INTERNAL REFERENCE REF DAC A REF DAC B REF DAC C REF DAC D CONTROL LOGIC DECODE 32-BIT SHIFT REGISTER ...
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... OPERATION The LTC2656 is a family of octal voltage output DACs in 20-lead 4mm × 5mm QFN and in 20-lead thermally en- hanced TSSOP 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 ac- curacy (16-bit and 12-bit), and full-scale voltage (2 ...
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... MSB- to-LSB, followed by four don’t care bits. Data can only be transferred to the LTC2656 when the CS/LD signal is low. The rising edge of CS/LD ends the data transfer and causes the device to carry out the action specifi the 24-bit input word ...
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... OPERATION LTC2656 2656p 19 ...
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... Power Supply Sequencing and Start-Up section. Integrated Reference Buffers Each of the eight DACs in LTC2656 has its own integrated high performance reference buffer. The buffers have very high input impedance and do not load the reference voltage source. These buffers shield the reference voltage from glitches caused by DAC switching and thus minimize DAC- to-DAC dynamic crosstalk ...
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... Offset and linearity are defi ned and tested over the region of the DAC transfer function where no output limiting can occur REF CC OUTPUT VOLTAGE 0 32,768 65,535 INPUT CODE (3a) LTC2656 /2 and the DAC full-scale error (FSE) CC – FSE)/ REF CC INPUT CODE (3c) 21 /2. CC ...
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... LTC2656 www.DataSheet4U.com PACKAGE DESCRIPTION 6.60 0.10 4.50 0.10 RECOMMENDED SOLDER PAD LAYOUT 4.30 – 4.50* (.169 – .177) 0.09 – 0.20 (.0035 – .0079) NOTE: 1. CONTROLLING DIMENSION: MILLIMETERS 2. DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE 22 FE Package 20-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663) Exposed Pad Variation CB 3.86 (.152) 2.74 (.108) SEE NOTE 4 0 ...
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... UFD Package 20-Lead Plastic QFN (4mm × 5mm) (Reference LTC DWG # 05-08-1711 Rev B) 0.70 0.05 3.65 0.05 PACKAGE OUTLINE 0.25 0.05 0.50 BSC 2.50 REF 4.10 0.05 5.50 0.05 0.75 0.05 4.00 0.10 (2 SIDES) PIN 1 TOP MARK (NOTE 6) LTC2656 1.50 REF R = 0.05 TYP 19 20 2.50 REF 3.65 0.10 2.65 0.10 0.200 REF 0.25 0. 0.115 TYP 0.50 BSC 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH 0.35 ...
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... C1 0.1μ 0.1μF 7.5k LDAC CLR REFCOMP REFIN/OUT PORSEL OUTA 1 SCK V OUTB 3 SDO V OUTC 4 LTC2656* SDI V OUTD 13 V OUTE 14 V OUTF 15 V OUTG 16 V GND REFLO GND OUTH COMMENTS DACs in 16-Pin Narrow SSOP V = 2.7V to 5.5V, Micropower, Rail-to-Rail Output ...