AD7708 Analog Devices, AD7708 Datasheet - Page 5

• Manufacturer Part Number: AD7708
• Description: 16-Bit 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7708

• Resolution (bits): 16bit
• # Chan: 10
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: SOIC,SOP

Parameter
LOGIC INPUTS (Continued)
LOGIC OUTPUTS (Excluding XTAL2)
SYSTEM CALIBRATION
START-UP TIME
POWER REQUIREMENTS
NOTES
1
2
3
4
5
Temperature range is –40°C to +85°C.
Not production tested, guaranteed by design and/or characterization data at release.
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.
Recalibration at any temperature will remove these errors.
I/O Port Logic Levels are with respect to AV
Specifications are subject to change without notice.
SCLK Only (Schmitt-Triggered Input)
XTAL1 Only
Input Currents
Input Capacitance
V
V
V
V
Floating State Leakage Current
Floating State Output Capacitance
Data Output Coding
Full-Scale Calibration Limit
Zero-Scale Calibration Limit
Input Span
From Power-On
From Power-Down Mode
Power Supply Voltages
AI
OH
OL
OH
OL
V
V
V
V
V
V
V
V
V
V
AV
DV
DI
AI
DI
DD
Power Supply Rejection (PSR)
Chop Disabled
Chop Enabled
, Output Low Voltage
, Output Low Voltage
T(+)
T(–)
T(+)
T(+)
T(–)
T(+)
INL
INH
INL
INH
, Output High Voltage
, Output High Voltage
DD
DD
DD
DD
(Power-Down Mode)
DD
, Input Low Voltage
, Input Low Voltage
, Input High Voltage
, Input High Voltage
–V
– V
–AGND
(Normal Mode)
(Normal Mode)
(Power-Down Mode)
–DGND
T(–)
T(–)
2
2
2
2
2
2
DD
2
5
and AGND.
B Grade
1.4/2
0.8/1.4
0.3/0.85
0.95/2
0.4/1.1
0.3/0.85
0.8
3.5
0.4
2.5
± 10
–70
10
DV
0.4
4
0.4
± 10
± 10
Binary
Offset Binary
1.05 × FS
–1.05 × FS
0.8 × FS
2.1 × FS
300
1
300
AV
2.7/3.6
4.75/5.25
2.7/3.6
4.75/5.25
0.55
0.65
1.1
10
2
30
8
1
70
100
DD
DD
and DV
– 0.6
DD
can be operated independently of each other.
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
V max
V min
V max
V min
µA max
µA max
pF typ
V min
V max
V min
V max
µA max
pF typ
V max
V min
V min
V max
ms typ
ms typ
ms typ
V min/max
V min/max
V min/max
V min
mA max
mA max
mA max
µA max
µA max
µA max
µA max
µA max
dB min
dB typ
Test Conditions
DV
DV
DV
DV
DV
DV
DV
DV
DV
Logic Input = DV
Logic Input = DGND, Typical –40 µA @ 5 V
and –20 µA at 3 V
All Digital Inputs
DV
DV
DV
DV
Unipolar Mode
Bipolar Mode
Oscillator Powered Down
AV
AV
DV
DV
DV
DV
AV
DV
DV
DV
DV
AV
Input Range = ± 2.56 V, AIN = 1 V
95 dB typ
DV
Oscillator Enabled
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
= 3 V nom
= 5 V nom
= 3 V or 5 V, 0.85 mA typ
= 3 V or 5 V
= 5 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V
= 5 V
= 5 V
= 3 V
= 3 V
= 3 V, I
= 3 V, I
= 5 V, I
= 5 V, I
= 3 V nom
= 5 V nom
= 3 V, 0.43 mA typ
= 5 V, 0.5 mA typ
= 3 V, 32.768 kHz Osc. Running
= 3 V, Oscillator Powered Down
= 5 V, 32.768 kHz Osc. Running
= 5 V, Oscillator Powered Down
SOURCE
SINK
SOURCE
SINK
AD7708/AD7718
DD
= 100 µA
= 1.6 mA
= 100 µA
= 200 µA