AD7686BRMZ Analog Devices Inc, AD7686BRMZ Datasheet - Page 13

• Manufacturer Part Number: AD7686BRMZ
• Description: IC ADC 16BIT 500KSPS 10-MSOP
• Manufacturer: Analog Devices Inc
• Series: PulSAR®r

Specifications of AD7686BRMZ

• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Bits: 16
• Sampling Rate (per Second): 500k
• Number Of Converters: 1
• Power Dissipation (max): 21.5mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP (0.118", 3.00mm Width)
• Resolution (bits): 16bit
• Input Channel Type: Pseudo Differential
• Supply Voltage Range - Analogue: 4.5V To 5.5V
• Supply Voltage Range - Digital: 1.8V To 5.8V, 2.3V To 5.8V
• Sampling Rate: 500kSPS
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7686CBZ - BOARD EVALUATION FOR AD7686
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Transfer Functions
The ideal transfer characteristic for the AD7686 is shown in
Figure 25 and Table 7.
Table 7. Output Codes and Ideal Input Voltages
Description
FSR – 1 LSB
Midscale + 1 LSB
Midscale
Midscale – 1 LSB
–FSR + 1 LSB
–FSR
1.
2.
This is also the code for an overranged analog input (V
This is also the code for an underranged analog input (V
V
GND
111...111
111...110
111...101
000...010
000...001
000...000
).
–FSR + 0.5 LSB
–FSR
Figure 25. ADC Ideal Transfer Function
0 TO VREF
–FSR + 1 LSB
Analog Input
V
4.999924 V
2.500076 V
2.5 V
2.499924 V
76.3 µV
0 V
REF
= 5 V
1
2
3
4
5
SEE REFERENCE SECTION FOR REFERENCE SELECTION.
C
SEE DRIVER AMPLIFIER CHOICE SECTION.
OPTIONAL FILTER. SEE ANALOG INPUT SECTION.
SEE DIGITAL INTERFACE FOR MOST CONVENIENT INTERFACE MODE.
3
REF
≤–2V
ANALOG INPUT
≥7V
≥7V
IS USUALLY A 10µF CERAMIC CAPACITOR (X5R).
Digital Output Code Hexa
FFFF
8001
8000
7FFF
0001
0000
+FSR – 1.5 LSB
REF
1
2.7nF
4
2
33Ω
1
Figure 26. Typical Application Diagram with Multiple Supplies
IN+
IN+
+FSR – 1 LSB
− V
10µF
− V
IN−
IN−
above V
2
below V
IN+
IN–
REF
Rev 0 | Page 13 of 28
GND
−
GND
REF
).
AD7686
VDD
TYPICAL CONNECTION DIAGRAM
Figure 26 shows an example of the recommended connection
diagram for the AD7686 when multiple supplies are available.
VIO
SDO
SCK
CNV
SDI
100nF
100nF
3- OR 4-WIRE INTERFACE
5V
1.8V TO VDD
5
AD7686