LTC2757BILX#PBF Linear Technology, LTC2757BILX#PBF Datasheet
LTC2757BILX#PBF
Specifications of LTC2757BILX#PBF
Available stocks
Related parts for LTC2757BILX#PBF
LTC2757BILX#PBF Summary of contents
Page 1
... DAC output to 0V regardless of output range. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
Page 2
... Lead Temperature (Soldering, 10 sec)................... 300°C ORDER INFORMATION LEAD FREE FINISH PART MARKING* LTC2757BCLX#PBF LTC2757LX LTC2757BILX#PBF LTC2757LX LTC2757ACLX#PBF LTC2757LX LTC2757AILX#PBF LTC2757LX Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. ...
Page 3
ELECTRICAL CHARACTERISTICS specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Static Performance Resolution Monotonicity DNL Differential Nonlinearity INL Integral Nonlinearity GE Gain Error GE Gain Error Temperature Coeffi cient TC ...
Page 4
LTC2757 ELECTRICAL CHARACTERISTICS specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Power Supply V Supply Voltage DD I Supply Current Digital Inputs V Digital Input High Voltage ...
Page 5
TIMING CHARACTERISTICS apply over the full operating temperature range, otherwise specifi cations are at T SYMBOL PARAMETER CLR Timing CLR Pulse Width Low 2.7V to 3.3V DD Write and Update Timing I/O Valid to WR Rising ...
Page 6
LTC2757 TYPICAL PERFORMANCE CHARACTERISTICS V = 5V 25°C, unless otherwise noted 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 65536 131072 196608 ...
Page 7
TYPICAL PERFORMANCE CHARACTERISTICS V = 5V 25°C, unless otherwise noted INL 1.0 ±10V RANGE 0.8 0.6 +INL 0.4 0.2 0 –INL –0.2 –0.4 –0.6 –0.8 –1.0 2.5 3 ...
Page 8
LTC2757 PIN FUNCTIONS R (Pins 1, 2): Input Resistor for External Reference IN Inverting Amplifi er. Normally tied to the external reference voltage. Typically 5V; accepts up to ±15V. These pins are internally shorted together. S2 (Pin 3): Span I/O ...
Page 9
PIN FUNCTIONS V (Pin 39): DAC Offset Adjust Pin. This voltage-control OSADJ pin can be used to null unipolar offset or bipolar zero error. The offset change expressed in LSB is the same for any output range. See System Offset ...
Page 10
LTC2757 TIMING DIAGRAMS WR I/O INPUT UPD D/S CLR READ WR I/O INPUT I/O OUTPUT UPD D/S 10 Write, Update and Clear Timing VALID ...
Page 11
OPERATION Output Ranges The LTC2757 is a current-output, parallel-input precision multiplying DAC offering ±1LSB INL and DNL over six software-selectable output ranges. Ranges can either be programmed in software for maximum fl exibility or hardwired through pin-strapping. Two unipolar ranges ...
Page 12
LTC2757 OPERATION Readback The contents of any one of the four interface registers can be read back from the I/O ports by using the READ pin in conjunction with the D/S and UPD pins. The I/O pins and registers are ...
Page 13
OPERATION The offset adjust pin V can be used to null unipolar OSADJ offset or bipolar zero error. The offset change expressed in LSB is the same for any output range: –V ΔV = OSADJ LSB • ...
Page 14
LTC2757 OPERATION—EXAMPLES 2. Load ±10V range with the output at 5V, changing to –5V. WR SPAN I/O INPUT DATA I/O 30000 INPUT UPD D/S READ = LOW 0V V OUT 3. Write and update mid-scale code ...
Page 15
APPLICATIONS INFORMATION Op Amp Selection Because of the extremely high accuracy of the 18-bit LTC2757, careful thought should be given to op amp selection in order to achieve the exceptional performance of which the part is capable. Fortunately, the sensitivity ...
Page 16
LTC2757 APPLICATIONS INFORMATION Table 5. Partial List of LTC Precision Amplifi ers Recommended for Use with the LTC2757 with Relevant Specifi cations AMPLIFIER μV nA LTC1150 10 0.05 LT1001 25 2 LT1012 25 0.1 LT1097 50 ...
Page 17
APPLICATIONS INFORMATION swing to ±10V at the output. Compensation is taken from the output of the LTC6240, allowing the use of a much larger compensation capacitor than if taken after the gain-of-fi ve stage. An LTC2054 auto-zero amplifi er senses ...
Page 18
LTC2757 TYPICAL APPLICATIONS ALTERNATE AMPLIFIER FOR OPTIMUM SETTLING TIME PERFORMANCE 5 I OUT2S OUT2F 1 ZETEX BAT54S 2 3 REF UPD UPD 34 READ READ 33 D/S ...
Page 19
... SHALL NOT EXCEED 0.25mm ON ANY SIDE, IF PRESENT 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. ...
Page 20
... Maximum Offset Voltage, 1.8μV 0.8mA Supply Current 90MHz GBW, 22V/μs Slew Rate www.linear.com ● 100pF 5V 5V – 15V + LTC6240 1k + LTC1360 – –5V –5V 10Ω –15V 1μF 5pF 4.02k 1k (0.1Hz to 10Hz) Noise, P-P LT 0410 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2010 V OUT 2757f ...