LTC2301 Linear Technology Corporation, LTC2301 Datasheet
LTC2301
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LTC2301 Summary of contents
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... The LTC2301/LTC2305 operate from an internal clock to achieve a fast 1.3μs conversion time. The LTC2301/LTC2305 operate from a single 5V supply and draw just 300μ throughput rate of 1ksps. The ADC enters nap mode when not converting, reducing the power dissipation. ...
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... V REF = 130°C/W JA PART MARKING* 2301 2301 2305 2305 2301 2301 2301 2305 LTC2301C/LTC2305C ............................... 0°C to 70°C LTC2301I/LTC2305I .............................. –40°C to 85°C LTC2301H/LTC2305H (Note 13) ......... –40°C to 125°C TOP VIEW GND 1 12 AD0 SDA 2 11 AD1 SCL GND ...
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... Bipolar (Note – V – (Unipolar – V – (Bipolar Sample Mode Hold Mode LTC2301/LTC2305 PACKAGE DESCRIPTION TEMPERATURE RANGE 12-Lead Plastic MSOP –40°C to 85°C 12-Lead Plastic MSOP –40°C to 125°C MIN TYP MAX ±0.4 l ±0.3 l ± ...
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... LTC2301/LTC2305 DYNAMIC ACCURACY otherwise specifi cations are at T SYMBOL PARAMETER SINAD Signal-to-(Noise + Distortion) Ratio SNR Signal-to-Noise Ratio THD Total Harmonic Distortion SFDR Spurious Free Dynamic Range Channel-to-Channel Isolation Full Linear Bandwidth –3dB Input Linear Bandwidth www.DataSheet4U.com Aperture Delay ...
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... A CONDITIONS (Note 11) (Note 11) l The denotes the specifi cations which apply over the full operating = 25°C. (Note 4) A CONDITIONS (Note 10μ 2.2μF REFCOMP REF LTC2301/LTC2305 MIN TYP MAX UNITS l 4. 2.3 3 225 400 μA ...
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... LTC2301/LTC2305 ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All voltage values are with respect to ground. ...
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... TYPICAL PERFORMANCE CHARACTERISTICS (LTC2301 25° 5V Integral Nonlinearity vs Output Code 1.00 0.75 0.50 0.25 0.00 www.DataSheet4U.com –0.25 –0.50 –0.75 –1.00 0 1024 2048 OUTPUT CODE Supply Current vs Sampling Frequency 2.5 2.0 1.5 1.0 0 SAMPLING FREQUENCY (ksps) Supply Current vs Temperature 2.4 2.2 1.8 1.6 1.4 –50 – TEMPERATURE (°C) = 14ksps, unless otherwise noted. ...
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... LTC2301/LTC2305 TYPICAL PERFORMANCE CHARACTERISTICS (LTC2305 25° 5V Integral Nonlinearity vs Output Code 1.00 0.75 0.50 0.25 0.00 www.DataSheet4U.com –0.25 –0.50 –0.75 –1.00 0 1024 2048 OUTPUT CODE Supply Current vs Sampling Frequency 2.5 2.0 1.5 1.0 0 SAMPLING FREQUENCY (ksps) Supply Current vs Temperature 2.4 2.2 1.8 1.6 1.4 –50 – TEMPERATURE (° 14ksps, unless otherwise noted. ...
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... DD SCL (Pin 3): Serial Clock Pin of the I LTC2301 can only act as a slave and the SCL pin only ac- cepts an external serial clock. Data is shifted into the SDA pin on the rising edges of the SCL clock and output through the SDA pin on the falling edges of the SCL clock. IN+, IN– ...
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... LTC2301/LTC2305 PIN FUNCTIONS (LTC2305) GND (Pins 1, 4, 9): Ground. All GND pins must be con- nected to a solid ground plane. SDA (Pin 2): Bidirectional Serial Data Line of the I terface. In transmitter mode (Read), the conversion result is output at the SDA pin, while in receiver mode (Write), the D word is input at the SDA pin to confi ...
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... LTC2301 LTC2305 + + CH0(IN ) ANALOG 12-BIT INPUT SAR ADC – MUX CH1(IN ) – INTERNAL 2.5V REF GAIN = 1.6384x PIN NAMES IN PARENTHESES REFER TO LTC2301 GND Defi nition of Timing for Fast/Standard Mode Devices on the I t SU(DAT SU(STA HD(DAT) HIGH LTC2301/LTC2305 AD1 AD0 ...
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... LTC2305 is defi ned as follows: S/D O UNI SLP S/D = SINGLE-ENDED/DIFFERENTIAL BIT O/S = ODD/SIGN BIT UNI = UNIPOLAR/BIPOLAR BIT SLP = SLEEP MODE BIT For the LTC2301, the input word is defi ned as UNI SLP Analog Input Multiplexer The analog input MUX is programmed by the S/D and O/S bits of the D ...
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... Each of the analog inputs of the LTC2305 (CH0 and – + CH1) can be used as single-ended input relative to GND differential pair. The analog inputs of the LTC2301 (IN 2 Single-Ended Regardless of the MUX confi guration, the “+” and “–“ + inputs are sampled at the same instant ...
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... REFCOMP 23015 F02b 50Ω ANALOG CH0, CH1 INPUT 2000pF LTC2305 REFCOMP 10μF 0.1μF 1000pF 50Ω CH0, IN DIFFERENTIAL ANALOG 1000pF 50Ω INPUTS CH1, IN 1000pF REFCOMP 10μF 0.1μF Figure 3b. Optional RC Input Filtering for Differential Inputs 23015 F03a + LTC2301 LTC2305 – 23015 F03b 23015f ...
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... V2 through V are the amplitudes of the second N through Nth harmonics. Internal Reference The LTC2301/LTC2305 have an on-chip, temperature compensated bandgap reference that is factory trimmed to 2.5V (Refer to Figure 5a internally connected to a reference amplifi er and is available should be bypassed to GND with a 2.2μF tantalum REF capacitor to minimize noise ...
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... Once addressed, they can receive confi guration bits (D word) or transmit the last conversion result. The serial clock line (SCL) is always an input to the LTC2301/LTC2305 and the serial data line (SDA) is bidirectional. These devices support the standard mode and the fast mode for data transfer speeds up to 400kbits/s (see Timing Diagram section for defi ...
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... SCL (see Figure 7a). The fi rst bit is the MSB and the 12th bit is the LSB of the conversion 1 2 SCL SDA A6 A5 START BY MASTER NOTE: S/D BIT IS A DON’T CARE (X) FOR THE LTC2301 1 2 SCL SDA A6 A5 START BY MASTER result. The remaining four bits are zero. Figures 13 and 14 are the transfer characteristics for the bipolar and unipolar modes. Data is output on the SDA line in 2’ ...
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... ADC’s confi guration is not desired. Otherwise, the ADC must be properly addressed and followed by a Stop condition to initiate a conversion. Initiating a New Conversion The LTC2301/LTC2305 awakens from either nap or sleep www.DataSheet4U.com when properly addressed for a read/write operation. A Stop command may then be issued after performing the read/write operation to trigger a new conversion ...
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... LTC2301/LTC2305 S GLOBAL ADDRESS CONVERSION Figure 10. Synchronize Multiple LTC2301/LTC2305s with a Global Address Call the request. The master then sends a write byte (optional) followed by the Stop command. This will update the channel selection (optional) and simultaneously initiate a conversion for all ADCs on the bus (see Figure 10). ...
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... If a write operation is being performed, acquisition of the input signal begins on the falling edge of the sixth clock cycle after the wake up and charge Figure 12b. The LTC2301/LTC2305 will acquire the signal REFWAKE from the input channel that was most recently programmed by the D the input signal before initiating a new conversion ...
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... ZERO FS = 4.096V n 1LSB = FS/2 1LSB = 1mV – FS/2 – 1LSB LSB 23015 F13 Figure 15a. Top Silkscreen LTC2301/LTC2305 111...111 111...110 100...001 100...000 UNIPOLAR 011...111 ZERO 011...110 000...001 FS = 4.096V 1LSB = FS/2 000...000 1LSB = 1mV 0V FS – ...
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... LTC2301/LTC2305 APPLICATIONS INFORMATION www.DataSheet4U.com Figure 15b. Topside Figure 15d. Layer 3 Power Plane 22 Figure 15c. Layer 2 Ground Plane Figure 15e. Bottomside 23015f ...
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... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 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. LTC2301/LTC2305 R = 0.115 TYP ...
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... Internal Reference, 4mm × 4mm QFN Package, Software Compatible with LTC2302/LTC2306 2 C Interface 5V, Internal Reference, 4mm × 4mm QFN and 20-Pin TSSOP Packages, Software Compatible with LTC2301/LTC2305 2 C Delta Sigma ADCs 2 LSB INL, 50nA Sleep Current, 60Hz Output Rate, 3mm × 2mm DFN Package, Single-Ended/Differential Inputs ...