Datasheet LTC2351-12 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 6 Channel, 12-Bit, 1.5Msps Simultaneous Sampling ADC with Shutdown |
| Pages / Page | 20 / 1 — FEATURES. DESCRIPTION. 1.5Msps ADC with 6 Simultaneously Sampled. … |
| File Format / Size | PDF / 235 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. 1.5Msps ADC with 6 Simultaneously Sampled. Differential Inputs. 250ksps Throughput per Channel. 72dB SINAD
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Text Version of Document
LTC2351-12 6 Channel, 12-Bit, 1.5Msps Simultaneous Sampling ADC With Shutdown
FEATURES DESCRIPTION
n
1.5Msps ADC with 6 Simultaneously Sampled
The LTC®2351-12 is a 12-bit, 1.5Msps ADC with six simul-
Differential Inputs
taneously sampled differential inputs. The device draws n
250ksps Throughput per Channel
only 5.5mA from a single 3V supply, and comes in a tiny n
72dB SINAD
32-pin (5mm × 5mm) QFN package. A Sleep shutdown n
Low Power Dissipation: 16.5mW
mode further reduces power consumption to 12μW. The n
3V Single Supply Operation
combination of low power and tiny package makes the n 2.5V Internal Bandgap Reference, Can be Overdriven LTC2351-12 suitable for portable applications. With External Reference The LTC2351-12 contains six separate differential inputs n 3-Wire SPI-Compatible Serial Interface that are sampled simultaneously on the rising edge of the n Internal Conversion Triggered by CONV CONV signal. These six sampled inputs are then converted n SLEEP (12μW) Shutdown Mode at a rate of 250ksps per channel. n NAP (4.5mW) Shutdown Mode n 0V to 2.5V Unipolar, or ±1.25V Bipolar Differential The 83dB common mode rejection allows users to eliminate Input Range ground loops and common mode noise by measuring n 83dB Common Mode Rejection signals differentially from the source. n Tiny 32-Pin (5mm × 5mm) QFN Package The device converts 0V to 2.5V unipolar inputs differentially, or ±1.25V bipolar inputs also differentially, depending on the
APPLICATIONS
state of the BIP pin. Any analog input may swing rail-to-rail as long as the differential input range is maintained. n Multiphase Power Measurement n The conversion sequence can be abbreviated to convert Multiphase Motor Control n fewer than six channels, depending on the logic state of Data Acquisition Systems n the SEL2, SEL1 and SEL0 inputs. Uninterruptable Power Supplies L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. The serial interface sends out the six conversion results in 96 All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6084440, 6522187. clocks for compatibility with standard serial interfaces.
BLOCK DIAGRAM
10μF 3V CH4– CH4+ CH5– CH5+ CH2– CH2+ CH3– CH3+ CH0– CH0+ CH1– CH1+ VCC VDD 21 20 19 18 17 16 15 14 12 11 10 9 8 7 6 5 4 24 25 13 OVDD + + + + + + 12-BIT LATCH 0 – 3V – – – – – 3 12-BIT LATCH 1 THREE- S AND H S AND H S AND H S AND H S AND H S AND H STATE 1.5Msps 12-BIT LATCH 2 SD0 SERIAL 1 12-BIT ADC 12-BIT LATCH 3 OUTPUT 0.1μF 12-BIT LATCH 4 OGND PORT 2 12-BIT LATCH 5 MUX CONV TIMING 30 2.5V LOGIC REFERENCE SCK 32 DGND 31 33 22 23 29 26 27 28 10μF 235112 TA01 GND VREF BIP SEL2 SEL1 SEL0 235112fa 1
FEATURES DESCRIPTION
n
1.5Msps ADC with 6 Simultaneously Sampled
The LTC®2351-12 is a 12-bit, 1.5Msps ADC with six simul-
Differential Inputs
taneously sampled differential inputs. The device draws n
250ksps Throughput per Channel
only 5.5mA from a single 3V supply, and comes in a tiny n
72dB SINAD
32-pin (5mm × 5mm) QFN package. A Sleep shutdown n
Low Power Dissipation: 16.5mW
mode further reduces power consumption to 12μW. The n
3V Single Supply Operation
combination of low power and tiny package makes the n 2.5V Internal Bandgap Reference, Can be Overdriven LTC2351-12 suitable for portable applications. With External Reference The LTC2351-12 contains six separate differential inputs n 3-Wire SPI-Compatible Serial Interface that are sampled simultaneously on the rising edge of the n Internal Conversion Triggered by CONV CONV signal. These six sampled inputs are then converted n SLEEP (12μW) Shutdown Mode at a rate of 250ksps per channel. n NAP (4.5mW) Shutdown Mode n 0V to 2.5V Unipolar, or ±1.25V Bipolar Differential The 83dB common mode rejection allows users to eliminate Input Range ground loops and common mode noise by measuring n 83dB Common Mode Rejection signals differentially from the source. n Tiny 32-Pin (5mm × 5mm) QFN Package The device converts 0V to 2.5V unipolar inputs differentially, or ±1.25V bipolar inputs also differentially, depending on the
APPLICATIONS
state of the BIP pin. Any analog input may swing rail-to-rail as long as the differential input range is maintained. n Multiphase Power Measurement n The conversion sequence can be abbreviated to convert Multiphase Motor Control n fewer than six channels, depending on the logic state of Data Acquisition Systems n the SEL2, SEL1 and SEL0 inputs. Uninterruptable Power Supplies L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. The serial interface sends out the six conversion results in 96 All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6084440, 6522187. clocks for compatibility with standard serial interfaces.
BLOCK DIAGRAM
10μF 3V CH4– CH4+ CH5– CH5+ CH2– CH2+ CH3– CH3+ CH0– CH0+ CH1– CH1+ VCC VDD 21 20 19 18 17 16 15 14 12 11 10 9 8 7 6 5 4 24 25 13 OVDD + + + + + + 12-BIT LATCH 0 – 3V – – – – – 3 12-BIT LATCH 1 THREE- S AND H S AND H S AND H S AND H S AND H S AND H STATE 1.5Msps 12-BIT LATCH 2 SD0 SERIAL 1 12-BIT ADC 12-BIT LATCH 3 OUTPUT 0.1μF 12-BIT LATCH 4 OGND PORT 2 12-BIT LATCH 5 MUX CONV TIMING 30 2.5V LOGIC REFERENCE SCK 32 DGND 31 33 22 23 29 26 27 28 10μF 235112 TA01 GND VREF BIP SEL2 SEL1 SEL0 235112fa 1
