AD7785BRUZ Analog Devices Inc, AD7785BRUZ Datasheet - Page 5

• Manufacturer Part Number: AD7785BRUZ
• Description: IC ADC 20BIT SIGMA-DELTA 16TSSOP
• Manufacturer: Analog Devices Inc

Specifications of AD7785BRUZ

• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Bits: 20
• Sampling Rate (per Second): 470
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• Resolution (bits): 20bit
• Input Channel Type: Differential
• Supply Voltage Range - Analogue: 2.7V To 5.25V
• Supply Voltage Range - Digital: 2.7V To 5.25V
• Supply: RoHS Compliant
• Sampling Rate: 470Hz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD7785EBZ - BOARD EVALUATION FOR AD7785
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Parameter
LOGIC OUTPUTS (INCLUDING CLK)
SYSTEM CALIBRATION
POWER REQUIREMENTS
1
2
3
4
5
6
7
Temperature range is –40°C to +105°C.
Specification is not production tested, but is supported by characterization data at initial product release.
Following a calibration, this error is in the order of the noise for the programmed gain and update rate selected.
Recalibration at any temperature removes these errors.
Full-scale error applies to both positive and negative full-scale and applies at the factory calibration conditions (AV
FS[3:0] are the four bits used in the mode register to select the output word rate.
Digital inputs equal to DV
SCLK, CLK, and DIN (Schmitt-
Input Currents
Input Capacitance
Floating-State Leakage Current
Floating-State Output Capacitance
Data Output Coding
Power Supply Voltage
Power Supply Currents
V
V
V
V
Full-Scale Calibration Limit
Zero-Scale Calibration Limit
Input Span
OH
OL
OH
OL
Triggered Input)
V
V
V
V
V
V
AV
DV
I
I
DD
DD
, Output Low Voltage
, Output Low Voltage
, Output High Voltage
, Output High Voltage
T
T
T
T
T
T
(+)
(–)
(+) − V
(+)
(–)
(+) − V
DD
DD
Current
(Power-Down Mode)
to GND
to GND
T
T
(−)
(−)
2
2
DD
7
or GND with excitation currents and bias voltage generator disabled.
2
2
2
2
AD7785B
1.4/2
0.8/1.7
0.1/0.17
0.9/2
0.4/1.35
0.06/0.13
±10
10
DV
0.4
4
0.4
±10
10
Offset binary
+1.05 × FS
−1.05 × FS
0.8 × FS
2.1 × FS
2.7/5.25
2.7/5.25
140
185
400
500
1
DD
− 0.6
1
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Unit
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
V min/V max
μA max
pF typ
V min
V max
V min
V max
μA max
pF typ
V max
V min
V max
V min/max
V min/max
μA max
μA max
μA max
μA max
μA max
V min
Test Conditions/Comments
DV
DV
DV
DV
DV
DV
V
All digital inputs
DV
DV
DV
DV
800 μA (CLK)
110 μA typ @ AV
unbuffered mode, external reference
130 μA typ @ AV
buffered mode, gain = 1 or 2, external reference
300 μA typ @ AV
gain = 4 to 128, external reference
400 μA typ @ AV
gain = 4 to 128, internal reference
IN
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
= DV
DD
= 5 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V
= 3 V, I
= 3 V, I
= 5 V, I
= 5 V, I
= 4 V, gain = 1, T
DD
or GND
SOURCE
SINK
SOURCE
SINK
= 100 μA
= 1.6 mA (DOUT/RDY)/
DD
DD
DD
DD
= 100 μA
= 200 μA
= 3 V, 125 μA typ @ AV
= 3 V, 165 μA typ @ AV
= 3 V, 350 μA typ @ AV
= 3 V, 450 μA typ @ AV
A
= 25°C).
AD7785
DD
DD
DD
DD
= 5 V,
= 5 V,
= 5 V,
= 5 V,