LTC2704 Linear Technology, LTC2704 Datasheet
LTC2704
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LTC2704 Summary of contents
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... SoftSpan offers six output spans—two unipolar and four bipolar—fully programmable through the 3-wire SPI serial interface. INL is accurate to 1LSB (2LSB for the LTC2704-16). DNL is accurate to 1LSB for all versions. Readback commands allow verification of any on-chip register in just one 24- or 32- bit instruction cycle. All other commands produce a “ ...
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... V to Any Pin .......................................................... 0.3V Maximum Junction Temperature ......................... 150°C Operating Temperature Range LTC2704C ............................................... 0°C to 70°C LTC2704I ............................................ – 40°C to 85°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T ...
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... MIN TYP ● –14.5 ● ● ● 700 1000 LTC2704 = 25°C, A TYP MAX UNITS ±2 µV/°C ±2 µV/°C ±2 ±8 LSB ±10 LSB ±0.05 LSB/V ±0.1 LSB/V ±0.02 ±1 LSB/V ±0.04 ±0.5 LSB/V µ ...
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... LTC2704 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are – 15V –15V SYMBOL PARAMETER AC Performance (Note 4) Glitch Impulse Crosstalk Digital Feedthrough Multiplying Feedthrough Error www.DataSheet4U.com Multiplying Bandwidth Output Noise Voltage Density ...
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... REF 1 – = ±15V ±5V RANGE 0.8 0.6 0.4 MAX 0.2 0 MIN –0.2 –0.4 –0.6 –0.8 –1.0 –10 –8 –6 –4 –2 0 49152 65535 V REF 2704 G02 LTC2704 MAX UNITS MHz MHz is limited by MAX ...
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... LTC2704 TYPICAL PERFOR A CE CHARACTERISTICS LTC2704-16 INL vs Temperature 1 – = ±15V 0.8 REF ±10V RANGE 0.6 0.4 MAX 0.2 0 MIN –0.2 www.DataSheet4U.com –0.4 –O.6 –0.8 –1.0 –50 –30 – TEMPERATURE (°C) Bipolar Zero vs Temperature – = ±15V REF 6 ±10V RANGE –2 – ...
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... G10 Differential Nonlinearity (DNL) 1 – = ±15V 0 REF ±10V RANGE 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 512 2048 2560 3072 3584 4095 1536 1024 CODE 2704 G12 Midscale Glitch CS/LD 5V/DIV V OUT 2mV/DIV 2704 G14 2.5µs/DIV LTC2704 2704 G15 2704f 7 ...
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... LTC2704 TYPICAL PERFOR A CE CHARACTERISTICS LTC2704-16/LTC2704-14/LTC2704-12 0.1Hz to 10Hz Noise 1µV/DIV www.DataSheet4U.com – = ±15V REF RANGE CODE = CTIO S – V (Pins 1, 8, 15, 22, 31, 36): Analog Negative Supply, Typically –15V. –4.5V to –16.5V Range. REFG1 (Pin 2): Reference 1 Ground. High impedance input, does not carry supply currents ...
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... REF1 (Pin 43): DAC A and DAC B Reference Input. REFM1 (Pin 44): Reference 1 Inverting Amp Output. The gain from REF1 to REFM1 is –1. Can swing to within 0.5V of the analog supplies V (Pin 34): Logic Supply. 2.7V to 5.5V Range. (DAC B) = –0.01 • V(VOSB) [0V to 5V, OS (Pin 42): Analog Positive Supply for DACs A DND – LTC2704 2704f 9 ...
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... LTC2704 BLOCK DIAGRA REF1 43 VOSB 40 C1B 39 RFBB 37 OUTB AGNDB + 41 – VOSA 4 C1A 5 RFBA 7 OUTA 6 AGNDA + 3 – REFM1 44 REFG1 DIAGRA SCK SDI t 5 CS/LD LDAC Hi-Z SRO 10 W – 1,8,15,22,31,36 DAC B – ...
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... The minimum (24-bit wide) load- ing sequence required for the LTC2704 is a 4-bit com- mand word ( C0), followed by a 4-bit address word ( A0) and 16 data (span or code) bits, MSB first ...
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... LTC2704 U OPERATIO OUTPUT RANGES The LTC2704 is a quad DAC with software-programmable output ranges. SoftSpan provides two unipolar output ranges ( and 0V to 10V), and four bipolar ranges (±2.5V, ±5V, ±10V and – 2.5V to 7.5V). These ranges are obtained when an external precision 5V reference and analog supplies of ± ...
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... U OPERATIO www.DataSheet4U.com LTC2704 2704f 13 ...
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... LTC2704 U OPERATIO www.DataSheet4U.com 14 2704f ...
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... Data Out on SRO = 0000 0000 0000 0100 Verifies that B1-Range of DAC C set to Bipolar ±2.5V Range. CS/LD↑ h) CS/LD↓ Clock SDI = 0000 0000 0100 0100 xxxx xxxx xxxx xxxx i) CS/LD↑ Update DAC C B1 into B2 for both Code and Range j) Alternatively steps h and i could be replaced with LDAC . LTC2704 2704f 15 ...
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... If not used, they should be shorted to their respective signal grounds, AGNDx. POWER-ON RESET AND CLEAR When power is first applied to the LTC2704, all DACs power- unipolar mode ( 0000). All internal DAC registers are reset to 0 and the DAC outputs are zero volts ...
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... When in doubt, use a single solid ground plane rather than separate planes. The LTC2704 does allow the ground potential of the DACs to vary by ±300mV with respect to analog ground, allow- ing compensation for ground return resistance. ...
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... U APPLICATIO S I FOR ATIO Voltage Output/Feedback and Compensation The LTC2704 provides separate voltage output and feed- back pins for each DAC. This allows compensation for resistance between the output and load current boosting stage such as an LT1970 may be inserted with- out affecting accuracy ...
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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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC2704 17.73 – 17.93* (.698 – .706) 10.11 – 10.55 (.398 – ...
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... SCK AGNDA OUTB GND1 BAV99LT1 1 TIE CLR 2 40 RFLAG VOSB VOSB 3 REMOTE 39 C1B 37 OUTSB REFG1 RFBB 38 REF1 OUTB OUTB 41 REFM1 AGNDB GND1 LTC2704 27 REFG2 VOSC VOSC 28 REF2 C1C 30 OUTSC REFM2 RFBC 29 OUTC OUTC 26 AGNDC OUTC GND2 1 TIE VOSD VOSD DD BAV99LT1 3 ...