AD7683 Analog Devices, AD7683 Datasheet
AD7683
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AD7683 Summary of contents
Page 1
... The reference voltage, REF, is applied externally and can be set up to the supply voltage. Its power scales linearly with throughput. The AD7683 is housed in an 8-lead MSOP or an 8-lead QFN (LFCSP) package, with an operating temperature specified from −40°C to +85°C. ...
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... Analog Input ............................................................................... 13 Driver Amplifier Choice ........................................................... 13 Voltage Reference Input ............................................................ 14 Power Supply ............................................................................... 14 Digital Interface .......................................................................... 14 Layout .......................................................................................... 14 Evaluating the AD7683 Performance ...................................... 14 Outline Dimensions ....................................................................... 15 Ordering Guide .......................................................................... 16 Rev Page ...
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... IN − 2.5 V +IN −IN REF = −500 μA SOURCE = +500 μA SINK MIN MAX Rev Page AD7683 AD7683 All Grades Min Typ Max REF −0.1 VDD + 0.1 −0.1 0 See the Analog Input section 10 0 100 0 2 ...
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... AD7683 VDD = VDD –40°C to +85°C, unless otherwise noted. REF A Table 3. Parameter Conditions ACCURACY No Missing Codes Integral Linearity Error Transition Noise Gain Error MIN MAX Gain Error Temperature Drift 1 Offset Error , MIN MAX Offset Temperature Drift VDD = 5 V ± ...
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... R F Figure 5. D Rise and Fall Timing OUT Rev Page Min Typ Max 100 100 16 50 400 ACQ POWER DOWN t DIS HIGH (LSB) 1. 0.8V 90% 10% AD7683 Unit kHz μ ...
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... AD7683 ABSOLUTE MAXIMUM RATINGS Table 6. Parameter Rating Analog Inputs 1 1 +IN , –IN GND − 0 VDD + 0 ±130 mA REF GND − 0 VDD + 0.3 V Supply Voltages VDD to GND −0 Digital Inputs to GND −0 VDD + 0.3 V Digital Outputs to GND −0 VDD + 0.3 V Storage Temperature Range − ...
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... AI = analog input digital input digital output; and P = power. REF VDD 1 8 AD7683 +IN DCLOCK 2 7 TOP VIEW – OUT (Not to Scale) GND Figure 6. 8-Lead MSOP and QFN (LFCSP) Pin Configuration . Rev Page AD7683 . When high high impedance. OUT OUT ...
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... AD7683 TERMINOLOGY Integral Nonlinearity Error (INL) Linearity error refers to the deviation of each individual code from a line drawn from negative full scale through positive full scale. The point used as negative full scale occurs ½ LSB before the first code transition. Positive full scale is defined as a level 1½ ...
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... CODE IN HEX Figure 11. Histogram Input at the Code Center 0 16384 POINT FFT VDD = REF = 2. 100kSPS 20.43kHz IN SNR = 88.7dB THD = –102.6dB SFDR = –104.6dB FREQUENCY (kHz) Figure 12. FFT Plot AD7683 65536 ...
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... AD7683 100 95 SNR 90 ENOB 85 80 2.0 2.5 3.0 3.5 4.0 REFERENCE VOLTAGE (V) Figure 13. SNR, SINAD, and ENOB vs. Reference Voltage 100 REF 100 FREQUENCY (kHz) Figure 14. SINAD vs. Frequency SINAD –100 14 –105 13 –110 4.5 5.0 5 5V, –10dB REF V = 5V, –1dB REF = 2.5V, –1dB 150 200 Rev Page – ...
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... Figure 18. Power-Down Current vs. Temperature 100kSPS –1 –2 –3 –4 –5 –6 85 105 125 –55 85 105 125 Rev Page OFFSET ERROR GAIN ERROR –35 – 105 TEMPERATURE (°C) Figure 19. Offset and Gain Error vs. Temperature AD7683 125 ...
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... The AD7683 provides the user with an on-chip track-and-hold and does not exhibit any pipeline delay or latency, making it ideal for multiple, multiplexed channel applications. The AD7683 is specified from 2 5 housed in an 8-lead MSOP or a tiny, 8-lead QFN (LFCSP) package. The AD7683 is an improved second source to the ADS8320 and ADS8325 ...
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... AD7683. ANALOG INPUT Figure 23 shows an equivalent circuit of the input structure of the AD7683. The two diodes, D1 and D2, provide ESD protec- tion for the analog inputs, +IN and −IN. Care must be taken to ensure that the analog input signal never exceeds the supply rails by more than 0 ...
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... AD8031 or LAYOUT Design the PCB that houses the AD7683 so that the analog and digital sections are separated and confined to certain areas of the board. The pin configuration of the AD7683, with all its analog signals on the left side and all its digital signals on the right side, eases this task ...
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... MAX * PADDLE CONNECTED TO GND. 0.02 NOM THIS CONNECTION IS NOT REQUIRED TO MEET THE ELECTRICAL PERFORMANCES. 0.20 REF Figure 27. 8-Terminal Quad Flat No Lead Package (QFN) [LFCSP_WD × Body, Very Very Thin, Dual Lead (CP-8-3) Dimensions Shown in millimeters Rev Page 0.80 0.60 0.40 0.65 BSC 8 1.74 * EXPOSED PAD 1.64 1.49 1 2.48 2.38 2.23 AD7683 ...
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... LSB max AD7683ARMRL7 ±6 LSB max 1 AD7683ARMZ ±6 LSB max 1 AD7683ARMZRL7 ±6 LSB max 1 AD7683BCPZRL ±3 LSB max 1 AD7683BCPZRL7 ±3 LSB max AD7683BRM ±3 LSB max AD7683BRMRL7 ±3 LSB max 1 AD7683BRMZ ±3 LSB max 1 AD7683BRMZRL7 ±3 LSB max 1 EVAL-AD7683CBZ 1, 2 EVAL-CONTROL BRD3Z 1 Z= RoHS Compliant Part ...