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AD7708BRUZ-REEL

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44
REV. 0
–4–
AD7718–SPECIFICATIONS
1
(AV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) =
2.5 V ; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal Input Buffer Enabled. All specifications T
MIN
to T
MAX
unless otherwise noted.)
Parameter B Grade Unit Test Conditions
AD7718 (CHOP ENABLED)
Output Update Rate 5.4 Hz min CHOP = 0
105 Hz max
No Missing Codes
2
24 Bits min 20 Hz Update Rate
Resolution 13 Bits p-p ±20 mV Range, 20 Hz Update Rate
18 Bits p-p ±2.56 V Range, 20 Hz Update Rate
Output Noise and Update Rates See Tables in
ADC Description
Integral Nonlinearity ±10 ppm of FSR max 2 ppm Typical
Offset Error
3
±3 µV typ
Offset Error Drift vs. Temp
4
10 nV/°C typ
Full-Scale Error
3
±10 µV/°C typ
Gain Drift vs. Temp
4
±0.5 ppm/°C typ
ANALOG INPUTS
Differential Input Full-Scale Voltage ±1.024 × REFIN/GAIN V nom REFIN Refers to Both REFIN1 and
REFIN2. REFIN = REFIN(+) REFIN(–)
GAIN = 1 to 128
Range Matching ±2 µV typ Analog Input = 18 mV
Absolute AIN Voltage Limits AGND + 100 mV V min AIN1–AIN10 and AINCOM with
AV
DD
– 100 mV V max NEGBUF = 1
Absolute AINCOM Voltage Limits AGND – 30 mV V min NEGBUF = 0
AV
DD
+ 30 mV V max
Analog Input Current AIN1–AIN10 and AINCOM with
NEGBUF = 1
DC Input Current
2
±1 nA max
DC Input Current Drift ±5 pA/°C typ
AINCOM Input Current NEGBUF = 0
DC Input Current
2
±125 nA/V typ ±2.56 V Range
DC Bias Current Drift ±2 pA/V/°C typ
Normal-Mode Rejection
2
@ 50 Hz 100 dB min 50 Hz ± 1 Hz, SF Word = 82
@ 60 Hz 100 dB min 60 Hz ± 1 Hz, SF Word = 68
Common-Mode Rejection
@ DC 90 dB min 100 dB typ, Analog Input = 1 V,
Input Range = ±2.56 V
110 dB typ on ±20 mV Range
@ 50 Hz
2
100 dB min 50 Hz ± 1 Hz, 20 Hz Update Rate
@ 60 Hz
2
100 dB min 60 Hz ± 1 Hz, 20 Hz Update Rate
REFERENCE INPUTS (REFIN1 AND REFIN2)
REFIN(+) to REFIN(–) Voltage 2.5 V nom REFIN Refers to Both REFIN1 and
REFIN2
REFIN(+) to REFIN(–) Range
2
1V min
AV
DD
V max
REFIN Common-Mode Range AGND – 30 mV V min
AV
DD
+ 30 mV V max
Reference DC Input Current
2
±0.5 µA/V typ
Reference DC Input Current Drift ±0.01 nA/V/°C typ
Normal-Mode Rejection
2
@ 50 Hz 100 dB min 50 Hz ± 1 Hz, SF Word = 82
@ 60 Hz 100 dB min 60 Hz ± 1 Hz, SF Word = 68
Common-Mode Rejection
2
Input Range = ±2.56 V
@ DC 110 dB typ Analog Input = 1 V
@ 50 Hz 110 dB typ 50 Hz ± 1 Hz, 20 Hz Update Rate
@ 60 Hz 110 dB typ 60 Hz ± 1 Hz, 20 Hz Update Rate
LOGIC INPUTS
5
All Inputs Except SCLK and XTAL1
2
V
INL
, Input Low Voltage 0.8 V max DV
DD
= 5 V
V
INL
, Input Low Voltage 0.4 V max DV
DD
= 3 V
V
INH
, Input High Voltage 2.0 V min DV
DD
= 3 V or 5 V
REV. 0
–5–
AD7708/AD7718
Parameter B Grade Unit Test Conditions
LOGIC INPUTS (Continued)
SCLK Only (Schmitt-Triggered Input)
2
V
T(+)
1.4/2 V min/V max DV
DD
= 5 V
V
T(–)
0.8/1.4 V min/V max DV
DD
= 5 V
V
T(+)
– V
T(–)
0.3/0.85 V min/V max DV
DD
= 5 V
V
T(+)
0.95/2 V min/V max DV
DD
= 3 V
V
T(–)
0.4/1.1 V min/V max DV
DD
= 3 V
V
T(+)
–V
T(–)
0.3/0.85 V min/V max DV
DD
= 3 V
XTAL1 Only
2
V
INL
, Input Low Voltage 0.8 V max DV
DD
= 5 V
V
INH
, Input High Voltage 3.5 V min DV
DD
= 5 V
V
INL
, Input Low Voltage 0.4 V max DV
DD
= 3 V
V
INH
, Input High Voltage 2.5 V min DV
DD
= 3 V
Input Currents ±10 µA max Logic Input = DV
DD
–70 µA max
Logic Input = DGND, Typical –40 µA @ 5 V
and –20 µA at 3 V
Input Capacitance 10 pF typ All Digital Inputs
LOGIC OUTPUTS (Excluding XTAL2)
5
V
OH
, Output High Voltage
2
DV
DD
– 0.6 V min DV
DD
= 3 V, I
SOURCE
= 100 µA
V
OL
, Output Low Voltage
2
0.4 V max DV
DD
= 3 V, I
SINK
= 100 µA
V
OH
, Output High Voltage
2
4V minDV
DD
= 5 V, I
SOURCE
= 200 µA
V
OL
, Output Low Voltage
2
0.4 V max DV
DD
= 5 V, I
SINK
= 1.6 mA
Floating State Leakage Current ±10 µA max
Floating State Output Capacitance ±10 pF typ
Data Output Coding Binary Unipolar Mode
Offset Binary Bipolar Mode
SYSTEM CALIBRATION
2
Full-Scale Calibration Limit 1.05 × FS V max
Zero-Scale Calibration Limit –1.05 × FS V min
Input Span 0.8 × FS V min
2.1 × FS V max
START-UP TIME
From Power-On 300 ms typ
From Power-Down Mode 1 ms typ Oscillator Enabled
300 ms typ Oscillator Powered Down
POWER REQUIREMENTS
Power Supply Voltages AV
DD
and DV
DD
can be operated independently of each other.
AV
DD
–AGND 2.7/3.6 V min/max AV
DD
= 3 V nom
4.75/5.25 V min/max AV
DD
= 5 V nom
DV
DD
–DGND 2.7/3.6 V min/max DV
DD
= 3 V nom
4.75/5.25 V min DV
DD
= 5 V nom
DI
DD
(Normal Mode) 0.55 mA max DV
DD
= 3 V, 0.43 mA typ
0.65 mA max DV
DD
= 5 V, 0.5 mA typ
AI
DD
(Normal Mode) 1.1 mA max AV
DD
= 3 V or 5 V, 0.85 mA typ
DI
DD
(Power-Down Mode) 10 µA max DV
DD
= 3 V, 32.768 kHz Osc. Running
2 µA max DV
DD
= 3 V, Oscillator Powered Down
30 µA max DV
DD
= 5 V, 32.768 kHz Osc. Running
8 µA max DV
DD
= 5 V, Oscillator Powered Down
AI
DD
(Power-Down Mode) 1 µA max AV
DD
= 3 V or 5 V
Power Supply Rejection (PSR) Input Range = ±2.56 V, AIN = 1 V
Chop Disabled 70 dB min 95 dB typ
Chop Enabled 100 dB typ
NOTES
1
Temperature range is –40°C to +85°C.
2
Not production tested, guaranteed by design and/or characterization data at release.
3
Following a self-calibration this error will be in the order of the noise for the programmed gain and update selected. A system calibration will completely remove this error.
4
Recalibration at any temperature will remove these errors.
5
I/O Port Logic Levels are with respect to AV
DD
and
AGND.
Specifications are subject to change without notice.
REV. 0
–6–
AD7708/AD7718
AD7708 SPECIFICATIONS
1
(AV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V, DV
DD
= 2.7 V to 3.6 V or 4.75 V to 5.25 V,
REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal Input Buffers Enabled. All specifications T
MIN
to
T
MAX
unless otherwise noted.)
Parameter B Grade Unit Test Conditions
AD7708 (CHOP DISABLED)
Output Update Rate 16.06 Hz min CHOP = 1
1.365 kHz max
No Missing Codes
2
16 Bits min
Resolution 13 Bits p-p ±20 mV Range, SF Word = 69
16 Bits p-p ±2.56 V Range, SF Word = 69
Output Noise and Update Rates See Tables in ADC Description
Integral Nonlinearity ±15 ppm of FSR max 2ppm Typical
Offset Error
3
±0.65 LSB typ Following a Self-Calibration
Offset Error Drift vs. Temp
4
±200 nV/°C typ
Full-Scale Error
3
±0.75 LSB typ
Gain Drift vs. Temp
4
±0.5 ppm/°C typ
Negative Full-Scale Error ±0.003 % FSR typ
ANALOG INPUTS
Differential Input Full-Scale Voltage ±1.024 × REFIN/GAIN V nom REFIN Refers to Both REFIN1 and
REFIN2. REFIN = REFIN(+) – REFIN(–)
GAIN = 1 to 128
Absolute AIN Voltage Limits AGND + 100 mV V min AIN1–AIN10 and AINCOM with
AV
DD
– 100 mV V max NEGBUF = 1
Absolute AINCOM Voltage Limits AGND – 30 mV V min NEGBUF = 0
AV
DD
+ 30 mV V max
Analog Input Current AIN1–AIN10 and AINCOM with
NEGBUF = 1
DC Input Current
2
±1 nA max
DC Bias Current Drift ±5 pA/°C typ
AINCOM Input Current NEGBUF = 0
DC Input Current
2
±125 nA/V typ ±2.56 V Range
DC Bias Current Drift ±2 pA/V/°C typ
Normal-Mode Rejection
2
@ 50 Hz 100 dB min 50 Hz ± 1 Hz, SF Word = 82
@ 60 Hz 100 dB min 60 Hz ± 1 Hz, SF Word = 68
Common-Mode Rejection
@ DC 90 dB min 100 dB typ, Analog Input = 1 V,
Input Range = ±2.56 V
110 dB typ on ±20 mV Range
@ 50 Hz 100 dB typ 50 Hz ± 1 Hz, SF Word = 82
@ 60 Hz 100 dB typ 60 Hz ± 1 Hz, SF Word = 68
REFERENCE INPUTS (REFIN1 AND REFIN2)
REFIN(+) to REFIN(–) Voltage 2.5 V nom REFIN Refers to Both REFIN1 and
REFIN2
REFIN(+) to REFIN(–) Range
2
1V min
AV
DD
V max
REFIN Common-Mode Range AGND – 30 mV V min
AV
DD
+ 30 mV V max
Reference DC Input Current 0.5 µA/V typ
Reference DC Input Current Drift ±0.1 nA/V/°C typ
Normal-Mode Rejection
2
@ 50 Hz 100 dB min 50 Hz ± 1 Hz, SF Word = 82
@ 60 Hz 100 dB min 60 Hz ± 1 Hz, SF Word = 68
Common-Mode Rejection Input Range = ±2.56 V
@ DC 100 dB typ Analog Input = 1 V. Input Range = ±2.56 V
@ 50 Hz 100 dB typ
@ 60 Hz 100 dB typ
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P44

AD7708BRUZ-REEL

Mfr. #:
Buy AD7708BRUZ-REEL
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 16-Bit 8/10-Ch Low Vtg Low Pwr
Lifecycle:
New from this manufacturer.
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