LTC2751 Linear Technology, LTC2751 Datasheet
LTC2751
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LTC2751 Summary of contents
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... The LTC plying parallel-input, current-output DACs. They operate from a single 2.7V to 5.5V supply. All parts are guaranteed monotonic over temperature. The LTC2751A-16 provides 16-bit performance (±1LSB INL and DNL) over temperature without any adjustments. These SoftSpan™ DACs offer six output ranges—two unipolar and four bipolar—that can be programmed through the parallel interface, or pinstrapped for operation in a single range ...
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... For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: 2 (Notes 1, 2) Operating Temperature Range LTC2751C .................................................... 0°C to 70°C LTC2751I ................................................. –40°C to 85°C Maximum Junction Temperature .......................... 125°C Storage Temperature Range ................... –65°C to 150°C + 0.3V (7V Max) ...
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... Range ±10V, 10kHz REF Sine Wave (Note 8) Multiplying (Note OUT1 Digital Inputs = LTC2751 denotes the ● = 25°C. A LTC2751B-16 LTC2751A-16 MAX MIN TYP MAX MIN TYP ±1 ±1 ±0.2 ±1 ±2 ±0.4 ±5 ± ...
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... LTC2751 www.DataSheet4U.com ELECTRICAL CHARACTERISTICS specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Digital Inputs V Digital Input High Voltage IH V Digital Input Low Voltage IL I Digital Input Current IN C Digital Input Capacitance ...
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... Note 7. Full-scale transition; REF = 0V. Note 8. REF = 6V amplifi LT1469. Note 9. Calculation from V (Boltzmann constant resistance (Ω), T = temperature (°K), and measured from REF to bandwidth (Hz). Note 10. Guaranteed by design. Not production tested. LTC2751 denotes specifi cations that ● = 25°C. A MIN TYP MAX ● ...
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... LTC2751 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS LTC2751-16 Integral Nonlinearity (INL REF ±10V RANGE 0.6 0.4 0.2 0.0 –0.2 –0.4 –0.6 –0.8 –1.0 0 16384 INL vs Temperature 1 0 REF ±10V RANGE 0.6 0.4 +INL 0.2 0.0 –INL –0.2 –0.4 –0.6 – 0.8 –1.0 –40 – TEMPERATURE (°C) Gain Error vs Temperature ...
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... CODE 2751 G11 1.0 0.8 0.6 0.4 0.2 0.0 –0.2 –0.4 –0.6 –0.8 –1.0 2048 3072 4095 CODE 2751 G13 LTC2751 T = 25°C, unless otherwise noted. A Settling 0V to 10V 2751 G10 500ns/DIV USING LT1469 AMP C = 12pF FEEDBACK 0V TO 10V STEP Differential Nonlinearity (DNL REF ± ...
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... LTC2751 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS LTC2751-12, LTC2751-14, LTC2751-16 Midscale Glitch UPD 5V/DIV V OUT 2mV/DIV REF RANGE Logic Threshold vs Supply Voltage 2 1.75 1.5 1.25 1 0.75 0.5 2.5 3 3.5 8 1nV•s (TYP) 2751 G15 500ns/DIV USING AN LT1469 C = 27pF FEEDBACK 1000 100 RISING FALLING 4 4.5 5 5.5 V (V) ...
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... MSPAN (Pin 18): Manual Span Control Pin. MSPAN is used to confi gure the LTC2751 for operation in a single, fi xed output range. When confi gured for single-span operation, the output range is set via hardware pin strapping. The span input and DAC registers are transparent and do not respond to write or update commands ...
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... LTC2751 www.DataSheet4U.com PIN FUNCTIONS S1 (Pin 33): Span I/O Bit 1. Pins S0, S1 and S2 are used to program and to read back the output range of the DAC. R (Pin 34): DAC Offset Adjust. Nominal input range is VOS ±5V. If not used, R should be shorted to I VOS I (Pin 35): DAC current output; normally tied to the OUT1 negative input of the I/V converter amplifi ...
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... R2 2 READ 16-BIT DAC WITH SPAN SELECT UPD 30 DAC CONTROL REGISTER LOGIC D CLR 17 INPUT MSPAN REGISTER 18 I/O PORT 3 3, 32, 33 6-14, 19-25 SPAN I/O S2-S0 LTC2751 OFS FB I OUT1 35 I OUT2 4 16 DAC REGISTER 16 INPUT REGISTER I/O PORT 16 2751 BD DATA I/O D15-D0 2751f 11 ...
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... Digital Section The LTC2751 family has four internal interface registers (see Block Diagram). Two of these—one input and one DAC register—are dedicated to the data I/O port, and two to the span I/O port. Each port is thus double-buffered. The double-buffered feature provides the capability to simulta- neously update the span and code, which allows smooth voltage transitions when changing output ranges ...
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... Read DAC Register X = Don’t Care Manual Span Confi guration Multiple output ranges are not needed in some applications. To confi gure the LTC2751 for single-span operation, tie the and the ⎯ pin to GND. The desired MSPAN pin output range is then specifi the span I/O pins (S0, S1 ...
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... The nominal input range of this pin is ±5V; other refer- ence voltages ±15V may be used if needed. The R pin has an input impedance of 1MΩ. To preserve the VOS settling performance of the LTC2751, this pin should be driven with a Thevenin-equivalent impedance of 10kΩ or less. If not used, R should be shorted to I VOS ...
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... DATA I/O OUTPUT UPD D/S READ 010 011 C000 H = 2.5V) using readback to check the contents of the input OUT HI-Z 8000 H 8000 H INPUT REGISTER DAC REGISTER LTC2751 8000 H UPDATE (±5V RANGE 0V) OUT 2751 TD03 4000 H UPDATE (5V) UPDATE (–5V) 2751 TD04 0000 H UPDATE (2.5V) 2751 TD05 2751f ...
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... A (V/V) A1 • VOL1 A VOL1 V (mV) 0 OS2 I (mV (V/V) 0 VOL2 Table 5. Partial List of LTC Precision Amplifi ers Recommended for Use with the LTC2751 with Relevant Specifi cations AMPLIFIER µV nA LT1001 25 2 LT1097 50 0.35 LT1112 (Dual) 60 0.25 LT1124 (Dual ...
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... Op amp offset will contribute mostly to output offset and gain error and has minimal effect on INL and DNL. For the LTC2751-16, a 250µV op amp offset will cause about 0.8LSB INL degradation and 0.2LSB DNL degradation with a 5V reference. For the LTC2751 programmed in 5V unipolar mode, the same 250µ ...
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... GND with a Force/Sense Amplifi er OUT2 16-Bit DAC with Software-Selectable Ranges 5 – 7 1/2 LT1469 6 C2** + 150pF REF COM OFS LTC2751-16 WR 16-BIT DAC WITH SPAN SELECT UPD READ D/S CLR 3 16 MSPAN R VOS 3, 33, 32 6-14, 19-25 34 SPAN I/O DATA I/O S2-S0 D15-D0 2 – 6 LT1001 OUT2 ...
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... DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LTC2751 0.70 ± 0.05 PACKAGE OUTLINE PIN 1 NOTCH R = 0.30 TYP OR 3.15 ± ...
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... C22 0.1 F 0.001 F GND GND D15 REF DD IN COM 7 D14 8 D13 9 D12 10 D11 11 D10 DATA I LTC2751- SPAN I D/S READ UPD WR CLR D/S READ UPD WR CLR COMMENTS 1ppm/°C Maximum Drift 0.05% Maximum Tolerance, 1ppm 0.1Hz to 10Hz Noise 90MHz GBW, 22V/µ ...