LTC2704CGW-12PBF LINER [Linear Technology], LTC2704CGW-12PBF Datasheet
LTC2704CGW-12PBF
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LTC2704CGW-12PBF Summary of contents
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FEATURES Six Programmable Output Ranges: ■ Unipolar 5V 10V Bipolar: ±5V, ±10V, ±2.5V, –2.5V to 7.5V Serial Readback of All On-Chip Registers ■ 1LSB INL and DNL Over the Industrial ■ Temperature Range (LTC2704-14/LTC2704-12) Force/Sense Outputs ...
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... REF2, REFM2 OSD + – 0. 0.3V 2 PART MARKING PACKAGE DESCRIPTION LTC2704CGW-16 44-Lead Plastic SSOP LTC2704IGW-16 44-Lead Plastic SSOP LTC2704CGW-14 44-Lead Plastic SSOP LTC2704IGW-14 44-Lead Plastic SSOP LTC2704CGW-12 44-Lead Plastic SSOP LTC2704IGW-12 44-Lead Plastic SSOP http://www.linear.com/leadfree/ http://www.linear.com/tapeandreel/ TOP VIEW – ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are T REFG1 = REFG2 = GND = 0V. SYMBOL PARAMETER CONDITIONS Accuracy Resolution Monotonicity INL Integral Nonlinearity REF DNL Differential Nonlinearity REF GE Gain Error V ...
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LTC2704 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are T REFG1 = REFG2 = GND = 0V. SYMBOL PARAMETER CONDITIONS SR Slew Rate Capacitive Load Within Maximum Load Current Driving ...
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ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are T REFG1 = REFG2 = GND = 0V. SYMBOL PARAMETER I Digital Input Current IN C Digital Input Capacitance IN TIMING CHARACTERISTICS range, otherwise specifi cations are at T SYMBOL PARAMETER V ...
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LTC2704 TYPICAL PERFORMANCE CHARACTERISTICS LTC2704-16 Integral Nonlinearity (INL) 1 – = ±15V 0 REF ±10V RANGE 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 32768 49152 16384 65535 CODE 2704 G01 INL ...
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TYPICAL PERFORMANCE CHARACTERISTICS LTC2704-16 Settling OUT 5V/DIV V OUT 1mV/DIV CS/LD 5V/DIV 2704 G18 2.5μs/DIV LTC2704-14 Integral Nonlinearity (INL) 1 – = ±15V 0 REF ±10V RANGE 0.6 0.4 0.2 ...
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LTC2704 TYPICAL PERFORMANCE CHARACTERISTICS LTC2704-16/LTC2704-14/LTC2704-12 Positive Slew 5V/DIV 2704 G13 – 2.5μs/DIV = ±15V REF ±10V RANGE 20V STEP 0.1Hz to 10Hz Noise 1μV/DIV – = ±15V 1s/DIV ...
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PIN FUNCTIONS CS/LD (Pin 10): Synchronous Chip Select and Load Pin. SDI (Pin 11): Serial Data Input. Data is clocked in on the rising edge of the serial clock when CS/LD is low. SRO (Pin 12): Serial Readback Data Output. ...
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LTC2704 BLOCK DIAGRAM REF1 43 VOSB 40 C1B 39 RFBB 37 OUTB DAC B 38 AGNDB + 41 – VOSA 4 C1A 5 RFBA 7 OUTA 6 DAC A AGNDA + 3 – REFM1 44 REFG1 ...
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OPERATION SERIAL INTERFACE When the CS/LD pin is taken low, the data on the SDI pin is loaded into the shift register on the rising edge of the clock signal (SCK pin). The minimum (24-bit wide) loading sequence required for ...
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LTC2704 OPERATION 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 ...
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OPERATION LTC2704 2704fb 13 ...
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LTC2704 OPERATION 14 2704fb ...
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OPERATION Examples 1. Using a 24-bit loading sequence, load DAC A with the unipolar range 10V, output at zero volts and all other DACs with the bipolar range of ±10V, outputs at zero volts. Note all DAC ...
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LTC2704 OPERATION should be driven with a Thevenin-equivalent impedance of 10kΩ or less. If not used, they should be shorted to their respective signal grounds, AGNDx. POWER-ON RESET AND CLEAR When power is fi rst applied to the LTC2704, all ...
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APPLICATIONS INFORMATION Overview The LTC2704 is a highly integrated device, greatly sim- plifying design and layout as compared to a design using multiple current output DACs and separate amplifi ers. A similar design using four separate current output DACs would ...
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LTC2704 APPLICATIONS INFORMATION Voltage Output/Feedback and Compensation The LTC2704 provides separate voltage output and feedback pins for each DAC. This allows compensation for resistance between the output and load current boosting stage such as an LT1970 may be ...
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APPLICATIONS INFORMATION POWER AND LOAD RETURN CURRENTS FLOW IN THIS REGION V AND V LOAD OUTA OUTB RETURN CURRENTS FLOW IN THIS REGION WHEN JP8 IS SET TO “TIE” DIGITAL RETURN CURRENTS FLOW IN THIS REGION Figure 5. DC752A Load ...
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LTC2704 PACKAGE DESCRIPTION 44 23 1.40 ±0.127 10.804 MIN 7.75 – 8.258 1 22 0.520 ±0.0635 0.800 BSC RECOMMENDED SOLDER PAD LAYOUT 7.417 – 7.595** (.292 – .299) 0.254 – 0.406 × 45° (.010 – .016) 0.231 – 0.3175 0.40 ...
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REVISION HISTORY (Revision history begins at Rev B) REV DATE DESCRIPTION B 10/09 Title Change to Block Diagram Electrical Characteristics Text Changes to Analog Outputs Section Text and Figure Deletion in Operation Section Information furnished by Linear Technology Corporation is ...
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LTC2704 TYPICAL APPLICATION Evaluation Board Schematic. Force/Sense Lines Allow for Remote Sensing and Optimal Grounding RFLAG REFx 20k REMOTE VOSx REFMx OFFSET ADJUSTMENT REMOTE FOR VOSA, VOSB, VOSC, VOSC REGULATOR 15V ...