LTC2752 Linear Technology, LTC2752 Datasheet
LTC2752
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LTC2752 Summary of contents
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... It operates from a single supply and is guaranteed monotonic over temperature. The LTC2752A provides full 16-bit performance (±1LSB INL and DNL, max) over temperature without any adjustments. This SoftSpan™ DAC offers six output ranges (up to ±10V) that can be programmed through the 3-wire SPI serial interface, or pinstrapped for operation in a single range ...
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... GND .................................................. –0. Digital Inputs to GND ................................... –0. Digital Outputs to GND ..... –0. Operating Temperature Range LTC2752C ................................................ 0°C to 70°C LTC2752I .............................................–40°C to 85°C Maximum Junction Temperature .......................... 150°C Storage Temperature Range .................. –65°C to 150°C Lead Temperature (Soldering, 10 sec)................... 300°C ...
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... RMS Code = Full Scale, –3dB Range ±10V, 10kHz REF Sine Wave (Note 10) (Note 11) Multiplying (Note 12 OUT1 www.DataSheet4U.com LTC2752 denotes the l = 25°C. A LTC2752B LTC2752A MIN TYP MAX MIN TYP MAX ±1 ±0.2 ±1 ±2 ±0.4 ±1 ± ...
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... LTC2752 elecTrical characTerisTics specifications which apply over the full operating temperature range, otherwise specifications are at T SYMBOL PARAMETER Power Supply V Supply Voltage Supply Current DD DD Digital Inputs V Digital Input High Voltage IH V Digital Input Low Voltage IL Hysteresis Voltage I Digital Input Current ...
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... R = resistance (Ω), T = temperature (°K), and COMX B = bandwidth (Hz Range; zero-, mid-, or full- scale. Note 13. Guaranteed by design, not subject to test. Note 14. When using SRO, maximum SCK frequency f SRO propagation delay t ( MAX 2 www.DataSheet4U.com LTC2752 MIN TYP MAX ...
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... LTC2752 Typical perForMance characTerisTics 25°C, unless otherwise noted. DD RINX A Integral Nonlinearity (INL) 1.0 ±10V RANGE 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 16384 32768 49152 65535 CODE 2752 G01 DNL vs Temperature 1.0 ±10V RANGE 0.8 0.6 0.4 +DNL 0.2 0.0 –DNL –0.2 –0.4 –0.6 –0.8 –1.0 –40 – ...
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... G07 DNL 1.0 ±10V RANGE 0.8 0.6 0.4 +INL 0.2 0.0 –INL –0.2 –0.4 –0.6 –0.8 –1.0 5.5 2.5 3 3.5 4 4.5 V (V) DD www.DataSheet4U.com LTC2752 DNL vs Reference Voltage 1.0 ±5V RANGE 0.8 0.6 0.4 +DNL +DNL 0.2 0.0 –DNL –DNL –10 –8 –6 –4 – V(R ) (V) IN 2752 G08 Multiplying Frequency Response ...
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... LTC2752 Typical perForMance characTerisTics 25°C, unless otherwise noted. DD RINX A Supply Current vs Logic Input Voltage 5 CLR, LDAC, SDI, SCK, CS/LD TIED TOGETHER DIGITAL INPUT VOLTAGE (V) 2752 G11 Settling Full-Scale Step UPD 5V/DIV ...
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... S1 (Pin 24): Span Bit 1 Input. In Manual Span mode (M-SPAN tied single fixed output range for all DACs. These pins should be tied to either GND or V www.DataSheet4U.com LTC2752 DD . The DAC output range is then set via DD (manual span configuration pins S0, S1 and S2 are pin-strapped ...
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... LTC2752 pin FuncTions S2 (Pin 25): Span Bit 2 Input. In Manual Span mode (M- SPAN tied pins S0, S1 and S2 are pin-strapped DD to select a single fixed output range for all DACs. These pins should be tied to either GND or V unused. LDAC (Pin 26): Asynchronous DAC Load Input. When LDAC is a logic low, all DACs are updated (CS/LD must be high) ...
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... SPAN REGISTERS 3 DAC REG INPUT REG INPUT REG CONTROL AND READBACK LOGIC RFLAG CLR CS/ www.DataSheet4U.com LTC2752 (31, 32) R 2.56M 20k GE R 20k (35, 36) REFB (37, 38 (39, 40) R DAC REG DAC B I 16-BIT WITH OUT1B 3 SPAN SELECT DAC REG ...
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... LTC2752 TiMing DiagraM SCK SDI CS/LD LDAC Hi-Z SRO www.DataSheet4U.com LSB t 11 LSB 2752 TD 2752f ...
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... Tie the M-SPAN pin to ground for normal SoftSpan operation. Input and DAC Registers The LTC2752 has 5 internal registers for each DAC, a total of 10 registers (see Block Diagram). Each DAC channel has two sets of double-buffered registers—one set for the code data, and one for the output range of the DAC—plus one readback register ...
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... Span Readback in Manual Span Configuration If a Span DAC register is chosen for readback, SRO re- sponds by outputting the actual output span; this is true whether the LTC2752 is configured for SoftSpan (M-SPAN tied to GND) or manual span (M-SPAN tied SoftSpan configuration, SRO outputs the span code from the Span DAC register (programmed through the SPI port) ...
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... LTC2752 2752f ...
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... LTC2752 operaTion www.DataSheet4U.com 2752f ...
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... All DACs (Note 1) Codes not shown are reserved–do not use. × = Don’t Care. Note 1. If readback is taken using the All DACs address, the LTC2752 defaults to DAC A. WRITE SPAN WRITE SPAN DAC C DAC B READ READ CODE INPUT ...
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... System Offset and Reference Adjustments Many systems require compensation for overall system offset. This may be an order of magnitude or more greater than the offset of the LTC2752, which is so low dominated by external output amplifier errors even when using the most precise op amps. ...
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... DAC performance. The V OSADJX These pins should be driven with a Thevenin-equivalent impedance of 10k or less to preserve the settling perfor- mance of the LTC2752. They should be shorted to GND if not used. The GE ADJX are intended for use with fixed reference voltages only. produces ∆V ...
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... V REF 16.5 A (V/mV) A1 • A2 • VOL1 A VOL1 V (mV) 0 OS2 I (nA (V/mV) 0 VOL2 Table 6. Partial List of LTC Precision Amplifiers Recommended for Use with the LTC2752 with Relevant Specifications AMPLIFIER µV nA LT1001 25 2 LT1097 50 0.35 LT1112 (Dual) 60 0.25 LT1124 (Dual LT1468 75 10 ...
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... DAC settling time and op amp selection. Precision Voltage Reference Considerations Much in the same way selecting an operational amplifier for use with the LTC2752 is critical to the performance of the system, selecting a precision voltage reference also requires due diligence. The output voltage of the LTC2752 is directly affected by the voltage reference ...
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... Table OUT2 5 under V and I calculated by substituting the total offset from I OUT2XF OUT2XS I for V OUT2XS 200Ω 200Ω 2 – 6 1000pF LT1468 LTC2752 R OFSA R FBA R INA GE I ADJA OUT1A DAC A R COMA I OUT2A REFA V OSADJA DAC B 2752 F05 ...
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... REF 7.15 – 7.25 C0.30 – 0.50 R0.08 – 0.20 GAUGE PLANE 0.25 0° – 7° 0.50 0.09 – 0.20 BSC SECTION A – PIN-1 INDENTIFIER IS A MOLDED INDENTATION, 0.50mm DIAMETER 5. DRAWING IS NOT TO SCALE www.DataSheet4U.com LTC2752 9.00 BSC 7.00 BSC 48 SEE NOTE: 4 7.00 BSC A A 1.35 – 1.45 0.17 – 0.27 0.05 – 0.15 9.00 BSC 1.60 MAX LX48 LQFP 0907 REVØ ...
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... REFA OFSA INA COMA 45 FBA C3 27pF 15V – I OUT1A OUT2A 4 –15V 39 LTC2752 FBB C4 27pF 15V – I OUT1B 28 OUT2B 4 –15V 7, 10, 15, 17, 18, 27, 30 GND REFB OFSB INB COMB 14 37, 38 31, 32 ...