AD7688BRMZ Analog Devices Inc, AD7688BRMZ Datasheet - Page 13

• Manufacturer Part Number: AD7688BRMZ
• Description: IC ADC DIFF 16BIT 500KSPS 10MSOP
• Manufacturer: Analog Devices Inc
• Series: PulSAR®r

Specifications of AD7688BRMZ

• 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: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP (0.118", 3.00mm Width)
• Resolution (bits): 16bit
• Sampling Rate: 500kSPS
• Input Channel Type: Differential
• Supply Voltage Range - Analog: 4.5V To 5.5V
• Supply Current: 1nA
• Digital Ic Case Style: SOP
• Number Of Elements: 1
• Resolution: 16Bit
• Architecture: SAR
• Sample Rate: 500KSPS
• Input Polarity: Bipolar
• Input Type: Voltage
• Rated Input Volt: ±5V
• Differential Input: Yes
• Power Supply Requirement: Single
• Single Supply Voltage (typ): 5V
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Power Dissipation: 21.5mW
• Differential Linearity Error: ±1LSB
• Integral Nonlinearity Error: ±1.5LSB
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 10
• Package Type: MSOP
• Input Signal Type: Differential
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7688CB - BOARD EVALUATION FOR AD7688
• Lead Free Status / Rohs Status: Compliant

Transfer Functions
The ideal transfer characteristic for the AD7688 is shown in
Figure 25 and Table 8.
Table 8. Output Codes and Ideal Input Voltages
Description
FSR – 1 LSB
Midscale + 1 LSB
Midscale
Midscale – 1 LSB
–FSR + 1 LSB
–FSR
1.
V
2.
+ V
GND
This is also the code for an overranged analog input (V
This is also the code for an underranged analog input (V
GND
).
011...111
011...110
011...101
100...010
100...001
100...000
).
–FSR + 0.5 LSB
–FSR
Figure 25. ADC Ideal Transfer Function
–FSR + 1 LSB
Analog Input
V
+4.999847 V
+152.6 μV
0 V
−152.6 μV
−4.999847 V
−5 V
REF
0 TO VREF
VREF TO 0
= 5 V
1
2
3
4
5
ANALOG INPUT
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
3
REF
≤–2V
≤–2V
≥7V
≥7V
≥7V
IS USUALLY A 10μF CERAMIC CAPACITOR (X5R).
Digital Output Code Hexa
7FFF
0001
0000
FFFF
8001
8000
+FSR – 1.5 LSB
1
2
REF
Figure 26. Typical Application Diagram with Multiple Supplies
4
4
2.7nF
2.7nF
33Ω
33Ω
IN+
1
IN+
+FSR – 1 LSB
− V
− V
IN−
10μF
IN−
above V
below −V
2
IN+
IN–
REF
Rev. A | Page 13 of 28
−
REF
GND
REF
AD7688
VDD
TYPICAL CONNECTION DIAGRAM
Figure 26 shows an example of the recommended connection
diagram for the AD7688 when multiple supplies are available.
VIO
SCK
SDO
CNV
SDI
100nF
100nF
3- OR 4-WIRE INTERFACE
5V
1.8V TO VDD
5
AD7688