ADS8370I BURR-BROWN [Burr-Brown Corporation], ADS8370I Datasheet
ADS8370I
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ADS8370I Summary of contents
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Burr Brown Products from Texas Instruments 16-BIT, 600-kHz, PSEUDO-DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH SERIAL INTERFACE AND REFERENCE FEATURES 600-kHz Sample Rate ±0.5 LSB Typ, ±1.25 LSB Max INL ±0.4 LSB Typ, ±0.75 LSB Max DNL 16-Bit NMC SINAD ...
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... RANGE INFORMATION QUANTITY Small Tape and ADS8370IRHPT –40°C to 85°C Tape and reel ADS8370IRHPR Small Tape and ADS8370IBRHPT –40°C to 85°C Tape and reel ADS8370IBRHPR UNIT –0 +VA + 0.3 V –0 +VA + 0.3 V –0 –0 –0 +VBD + 0.3 V +0.3 V – ...
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... Figure 51 and digital stimulus in Figure 56 51. SLAS450 – JUNE 2005 = 600 kHz, SAMPLE ADS8370I MAX MIN TYP MAX ref V + 0.2 –0 0.2 ref ref 0.2 –0 1.25 –2 0.75 – ...
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... A 2.5 25 +VBD – 1 –0.3 +VBD –0.6 4.75 5 2.7 3 –40 Figure 51 and digital stimulus in Figure 56 www.ti.com = 600 kHz, SAMPLE ADS8370I MAX MIN TYP MAX –111 –111 –92 89.5 89 88.5 89 119 117 92 75 4.2 2.5 4.096 10 4.104 4.088 4.096 4.104 10 2 ...
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... Quiet time zones are for meeting performance and not functionality acq1 d18 (6) ( (10 and timed from a voltage level Figure 39). ADS8370 SLAS450 – JUNE 2005 ADS8370I/ADS8370IB REF UNIT FIGURE MIN TYP MAX 1000 1160 ns 41 – 44 0.5 µs 41,42,44 0.8 µs 40 – ...
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... All specifications typical at –40°C to 85°C, +VA = +4. +5.25 V, +VBD = +2 +5.25 V. (3) All digital output signals loaded with 10-pF capacitors. (4) Including t , two conversions (time to cycle CONVST twice), and t d11 (10 and timed from a voltage level d17 www.ti.com ADS8370I/ADS8370IB REF UNIT FIGURE MIN TYP MAX 10 ns 41, – 43 ...
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SB/2C 2 AGND 3 +VA 4 AGND 5 AGND 6 +VA 7 REFM Note: The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance. PIN I/O NAME NO. AGND 2, 4, ...
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ADS8370 SLAS450 – JUNE 2005 SIGNAL-TO-NOISE RATIO vs REFERENCE VOLTAGE 91 + +VBD = kHz 2.5 3 3.5 V − ...
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TYPICAL CHARACTERISTICS (continued) SIGNAL-TO-NOISE RATIO vs FREE-AIR TEMPERATURE 90 89.5 89 88 +VBD = 5 V, REFIN = 4.096 V, 87 kHz −40 −25 − ...
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ADS8370 SLAS450 – JUNE 2005 TYPICAL CHARACTERISTICS (continued) SIGNAL-TO-NOISE RATIO vs INPUT FREQUENCY 89.6 89.4 89.2 89 88.8 + +VBD = 5 V, 88.6 REFIN = 4.096 88 ...
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TYPICAL CHARACTERISTICS (continued) GAIN ERROR vs REFERENCE VOLTAGE 1 + 0.8 +VBD = 0.6 0.4 0.2 0 −0.2 −0.4 −0.6 −0.8 −1 2 − Reference Voltage − ...
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ADS8370 SLAS450 – JUNE 2005 TYPICAL CHARACTERISTICS (continued) POWER DISSIPATION vs SUPPLY VOLTAGE 116 +VBD = 5 V, 114 f = 600 KSPS 112 110 108 106 104 102 100 4.75 5 +VA − ...
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TYPICAL CHARACTERISTICS (continued) INTEGRAL NONLINEARITY vs FREE-AIR TEMPERATURE 1 MAX 0.8 0.6 0.4 + +VBD = 5 V, 0.2 REFIN = 4.096 V 0 −0.2 MIN −0.4 −0.6 −0.8 −1 −40 −25 − ...
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ADS8370 SLAS450 – JUNE 2005 TYPICAL CHARACTERISTICS (continued) 1 0.8 0.6 0.4 0.2 0 −0.2 −0.4 + +VBD = 5 V, REFIN = 4.096 V, −0 600 KSPS, S −0 ...
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and CONVST = and CONVST = 1 Back to Back Cycle CONVST_QUAL = 0 NAP BUSY=0 A. EOC = End of conversion, SOC = Start of conversion, CONVST_QUAL is CONVST latched by ...
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ADS8370 SLAS450 – JUNE 2005 CONVST_QUAL t quiet1 BUSY CS t su2 BUSY No Read Zone (CS Initiated) CONVERSION AND SAMPLING 1. Convert start command: The device enters the conversion phase from the sampling phase when a falling edge is ...
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Wait/Nap entry stimulus: The device enters the wait phase at the end of the conversion if the sample start command is not given. This is shown in Figure 42 su4 CONVST CONVST_QUAL (Device Internal) t ...
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ADS8370 SLAS450 – JUNE 2005 4. Conversion abort command An ongoing conversion can be aborted by using the conversion abort command. This is done by forcing another start of conversion (a valid CONVST_QUAL falling edge) onto an ongoing conversion as ...
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SCLK CONVST SDO MSB D15 t BUSY quiet3 Conversion su2 CS Fall Before This CS Fall After This No CS Point Reads Data Fall Point Reads Data Zone From ...
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ADS8370 SLAS450 – JUNE 2005 1 2 SCLK su7 su6 w3 FS CONVST MSB of Conversion N−1 t MSB of Conversion N d15 SDO D15 quiet3 BUSY Conversion ...
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PRINCIPLES OF OPERATION (continued) Figure 48. ADS8370 Using Internal Reference The REFIN pin is also internally buffered. This eliminates the need to put a high bandwidth buffer on the board to drive the ADC reference and saves system area ...
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ADS8370 SLAS450 – JUNE 2005 PRINCIPLES OF OPERATION (continued) signals. Essentially, the current into the ADS8370 charges the internal capacitor array during the sampling (acquisition) time. After this capacitance has been fully charged, there is no further input current. The ...
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DIGITAL INTERFACE (continued) READING DATA The ADS8370 offers a high speed serial interface that is compatible with the SPI protocol. The device outputs data in either 2's complement format or straight binary format depending on the state of the ...
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ADS8370 SLAS450 – JUNE 2005 PD t d10 SDO BUSY REFOUT td16 I Full Figure 53. Device Full Power Down/Resume (Internal Refernce Used d10 SDO BUSY t d16 I Full Figure 54. ...
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CONVST CS CONVST_QUAL DEVICE SAMPLE STATE SDO LSB+1 LSB BUSY REFIN (or REFOUT) I Full Figure 55. Device Nap Power Down/Resume LAYOUT For optimum performance, care should be taken with the physical layout ...
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ADS8370 SLAS450 – JUNE 2005 Table 3. Power Supply Decoupling Capacitor Placement SUPPLY PINS Pair of pins requiring a shortest path to decoupling capacitors Pins requiring no decoupling When using the internal reference, ensure a shortest path from REFOUT (pin ...
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APPLICATION INFORMATION (continued also possible to use the frame sync signal, FS. The following timing diagram shows how to achieve a 600-KSPS throughput using a modified serial interface with FS active. BUSY DEVICE STATE CONVERT Frequency = ...
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... ADS8370IBRHPT ACTIVE ADS8370IBRHPTG4 ACTIVE ADS8370IRHPR ACTIVE ADS8370IRHPT ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...
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