AD7945BNZ データシートの表示（PDF） - Analog Devices
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AD7945BNZ Datasheet PDF : 16 Pages
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AD7943/AD7945/AD7948–SPECIFICATIONS1
NORMAL MODE (AD7943: VDD = +4.5 V to +5.5 V; VIOUT1 = VIOUT2 = AGND = 0 V; VREF = +10 V; TA = TMIN to TMAX, unless otherwise noted.
AD7945, AD7948: VDD = +4.5 V to +5.5 V; VIOUT1 = AGND = 0 V; VREF = +10 V; TA = TMIN to TMAX, unless otherwise noted.)
Parameter
B Grades2 T Grade2, 3 Units
Test Conditions/Comments
ACCURACY
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
TMIN to TMAX
Gain Temperature Coefficient4
Output Leakage Current
IOUT1
@ +25°C
TMIN to TMAX
REFERENCE INPUT
Input Resistance
12
± 0.5
± 0.5
±2
2
5
10
100
6
12
12
± 0.5
± 0.5
±2
2
5
10
100
6
12
Bits
LSB max
LSB max
1 LSB = VREF/212 = 2.44 mV when VREF = 10 V
All Grades Guaranteed Monotonic over
Temperature
LSB max
ppm FSR/°C typ
ppm FSR/°C max
nA max
nA max
kΩ min
kΩ max
See Terminology Section
Typically 20 nA over Temperature
Typical Input Resistance = 9 kΩ
DIGITAL INPUTS
VINH, Input High Voltage
VINL, Input Low Voltage
IINH, Input Current
CIN, Input Capacitance4
2.4
2.4
0.8
0.8
±1
±1
10
10
V min
V max
µA max
pF max
DIGITAL OUTPUT (AD7943 SRO)
Output Low Voltage (VOL)
Output High Voltage (VOH)
0.2
0.2
VDD – 0.2 VDD – 0.2
V max
V min
For 1 CMOS Load
POWER REQUIREMENTS
VDD Range
Power Supply Sensitivity4
∆Gain/∆VDD
IDD (AD7943)
IDD (AD7945, AD7948)
4.5/5.5
–75
5
4.5/5.5
–75
5
V min/V max
dB typ
µA max
5
5
µA max
VINH = VDD – 0.1 V min, VINL = 0.1 V max.
SRO Open Circuit. No STB Signal. Typically
1 µA. Typically 100 µA with a 1 MHz STB
Frequency. At Input Levels of 0.8 V and 2.4 V,
IDD Is Typically 2.5 mA.
VINH = VDD – 0.1 V min, VINL = 0.1 V max.
Typically 1 µA. At Input Levels of 0.8 V and
2.4 V, IDD Is Typically 2.5 mA.
NOTES
1The AD7943, AD7945 and AD7948 are specified in the normal current mode configuration and in the biased current mode for single-supply applications.
Figures 14 and 15 are examples of normal mode operation.
2Temperature ranges as follows: B Grades: –40°C to +85°C; T Grade: –55°C to +125°C.
3The T Grade applies to the AD7945 only.
4Guaranteed by design.
Specifications subject to change without notice.
–2–
REV. B
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