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| 型號： | AD7705BN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | ECONOLINE: REC2.2-S_DR/H1 - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75% |
| 中文描述： | 2-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, MS-001AB, DIP-16 |
| 文件頁數： | 3/32頁 |
| 文件大小： | 264K |
| 代理商： | AD7705BN |
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–3–
REV. A
AD7705/AD7706
Parameter
B Version
1
Units
Conditions/Comments
LOGIC OUTPUTS (Including MCLK OUT)
V
OL
, Output Low Voltage
V
OL
, Output Low Voltage
V
OH
, Output High Voltage
V
, Output High Voltage
Floating State Leakage Current
Floating State Output Capacitance
13
Data Output Coding
0.4
0.4
4
V
–0.6
±
10
9
Binary
Offset Binary
V max
V max
V min
V min
μ
A max
pF typ
I
SINK
= 800
μ
A Except for MCLK OUT.
12
V
DD
= 5 V.
I
SINK
= 100
μ
A Except for MCLK OUT.
12
V
DD
= 3 V.
I
SOURCE
= 200
μ
A Except for MCLK OUT.
12
DD
= 5 V.
I
SOURCE
= 100
μ
A Except for MCLK OUT.
12
V
DD
= 3 V.
Unipolar Mode
Bipolar Mode
SYSTEM CALIBRATION
Positive Full-Scale Calibration Limit
14
Negative Full-Scale Calibration Limit
14
Offset Calibration Limit
14
Input Span
(1.05
×
V
REF
)/GAIN
–(1.05
×
V
REF
)/GAIN
–(1.05
×
V
REF
)/GAIN
(0.8
×
V
REF
(2.1
×
V
REF
)/GAIN
V max
V max
V max
V min
V max
GAIN Is the Selected PGA Gain (1 to 128)
GAIN Is the Selected PGA Gain (1 to 128)
GAIN Is the Selected PGA Gain (1 to 128)
GAIN Is the Selected PGA Gain (1 to 128)
GAIN Is the Selected PGA Gain (1 to 128)
POWER REQUIREMENTS
V
DD
Voltage
Power Supply Currents
16
+2.7 to +3.3
V min to V max
For Specified Performance
Digital I/Ps = 0V or V
DD
. External MCLK IN and
CLK DIS = 1
BUF Bit = 0. f
CLKIN
= 1MHz. Gains of 1 to 128
BUF Bit = 1. f
CLKIN
= 1MHz. Gains of 1 to 128
BUF Bit = 0. f
CLKIN
= 2.4576MHz. Gains of 1 to 4
BUF Bit = 0. f
CLKIN
= 2.4576MHz. Gains of 8 to 128
BUF Bit = 1. f
CLKIN
= 2.4576MHz. Gains of 1 to 4
BUF Bit = 1. f
CLKIN
= 2.4576MHz. Gains of 8 to 128
For Specified Performance
Digital I/Ps = 0V or V
DD
. External MCLK IN and
CLK DIS = 1.
BUF Bit = 0. f
CLKIN
= 1MHz. Gains of 1 to 128
BUF Bit = 1. f
CLKIN
= 1MHz. Gains of 1 to 128
BUF Bit = 0. f
CLKIN
= 2.4576MHz. Gains of 1 to 4
BUF Bit = 0. f
CLKIN
= 2.4576MHz. Gains of 8 to 128
BUF Bit = 1. f
CLKIN
= 2.4576MHz. Gains of 1 to 4
BUF Bit = 1. f
CLKIN
= 2.4576MHz. Gains of 8 to 128
External MCLK IN = 0 V or V
DD
. V
DD
= 5 V. See Figure 9
External MCLK IN = 0 V or V
DD
. V
DD
= 3 V
0.32
0.6
0.4
0.6
0.7
1.1
+4.75 to +5.25
mA max
mA max
mA max
mA max
mA max
mA max
V min to V max
V
DD
Voltage
Power Supply Currents
16
0.45
0.7
0.6
0.85
0.9
1.3
16
8
See Note 19
mA max
mA max
mA max
mA max
mA max
mA max
μ
A max
μ
A max
dB typ
Standby (Power-Down) Current
17
Power Supply Rejection
18
NOTES
Temperature range as follows: B Version, –40
°
C to +85
°
C.
2
These numbers are established from characterization or design at initial product release.
3
A calibration is effectively a conversion so these errors will be of the order of the conversion noise shown in Tables I and III. This applies after calibration at the
temperature of interest.
4
Recalibration at any temperature will remove these drift errors.
5
Positive Full-Scale Error includes Zero-Scale Errors (Unipolar Offset Error or Bipolar Zero Error) and applies to both unipolar and bipolar input ranges.
6
Full-Scale Drift includes Zero-Scale Drift (Unipolar Offset Drift or Bipolar Zero Drift) and applies to both unipolar and bipolar input ranges.
7
Gain Error does not include Zero-Scale Errors. It is calculated as Full-Scale Error–Unipolar Offset Error for unipolar ranges and Full-Scale Error–Bipolar Zero Error for
bipolar ranges.
8
Gain Error Drift does not include Unipolar Offset Drift/Bipolar Zero Drift. It is effectively the drift of the part if zero scale calibrations only were performed.
9
This common-mode voltage range is allowed provided that the input voltage on analog inputs does not go more positive than V
DD
+ 30 mV or go more negative than
GND – 30mV. Parts are functional with voltages down to GND – 200 mV, but with increased leakage at high temperature.
10
The analog input voltage range on AIN(+) is given here with respect to the voltage on AIN(–) on the AD7705 and is given with respect to the COMMON input on the
AD7706. The absolute voltage on the analog inputs should not go more positive than V
DD
+ 30mV, or go more negative than GND– 30mV for specified performance, input
voltages of GND – 200 mV can be accommodated, but with increased leakage at high temperature.
11
V
REF
= REF IN(+) – REF IN(–).
12
These logic output levels apply to the MCLK OUT only when it is loaded with one CMOS load.
13
Sample tested at +25
°
C to ensure compliance.
14
After calibration, if the analog input exceeds positive full scale, the converter will output all 1s. If the analog input is less than negative full scale, the device will output all 0s.
15
These calibration and span limits apply provided the absolute voltage on the analog inputs does not exceed V
DD
+ 30mV or go more negative than GND – 30mV. The offset
calibration limit applies to both the unipolar zero point and the bipolar zero point.
16
When using a crystal or ceramic resonator across the MCLK pins as the clock source for the device, the V
DD
current and power dissipation will vary depending on the crystal or
resonator type (see Clocking and Oscillator Circuit section).
17
If the external master clock continues to run in standby mode, the standby current increases to 150
μ
A typical at 5 V and 75
μ
A at 3 V. When using a crystal or ceramic
resonator across the MCLK pins as the clock source for the device, the internal oscillator continues to run in standby mode and the power dissipation depends on the crystal
or resonator type (see Standby Mode section).
18
Measured at dc and applies in the selected passband. PSRR at 50Hz will exceed 120dB with filter notches of 25 Hz or 50Hz. PSRR at 60Hz will exceed 120dB with filter
notches of 20 Hz or 60Hz.
19
PS
RR depends on both gain and V
DD
.
Gain
V
DD
= 3 V
V
DD
= 5 V
1
86
90
2
78
78
4
85
84
8–128
93
91
Specifications subject to change without notice.
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