AD7845AR 查看數據表（PDF） - Analog Devices
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AD7845AR Datasheet PDF : 12 Pages
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AD7845–SPECIFICATIONS1
(VDD = +15 V, ؎ 5%, VSS = –15 V, ؎ 5%, VREF = +10 V, AGND = DGND = O V,
VOUT connected to RFB. VOUT load = 2 k⍀, 100 pF. All specifications TMIN to TMAX unless otherwise noted.)
Parameter
J Version
ACCURACY
Resolution
12
Relative Accuracy
at +25°C
±1
TMIN to TMAX
±1
Differential Nonlinearity
±1
Zero Code Offset Error
at +25°C
±2
TMIN to TMAX
±3
Offset Temperature Coefficient;
(∆Offset/∆Temperature)2 ±5
Gain Error
±3
±6
±6
±7
Gain Temperature Coefficient;
(∆Gain/∆Temperature)2
±2
K Version A Version B Version
12
12
12
± 1/2
±1
± 1/2
± 3/4
±1
± 3/4
±1
±1
±1
±1
±2
±1
±2
±3
±2
±5
±5
±5
±2
±3
±2
±6
±6
±6
±6
±6
±6
±7
±7
±7
±2
±2
±2
S Version
12
±1
±1
±1
±2
±4
±5
±3
±6
±6
±7
±2
T Version
12
± 1/2
± 3/4
±1
±1
±3
±5
±2
±6
±6
±7
±2
Units
Bits
LSB max
LSB max
LSB max
mV max
mV max
Test Conditions/Comments
VREF
1 LSB =
= 2.4 mV
212
All Grades Are Guaranteed
Monotonic over Temperature
DAC Register Loaded with
All 0s.
µV/°C typ
LSB max
LSB max
LSB max
LSB max
RFB, VOUT Connected
RC, VOUT Connected, VREF = +5 V
RB, VOUT Connected, VREF = +5 V
RA, VOUT Connected, VREF = +2.5 V
ppm of FSR/°C RFB, VOUT Connected
typ
REFERENCE INPUT
Input Resistance, Pin 17
8
8
8
8
16
16
16
16
8
8
16
16
kΩ min
kΩ max
Typical Input Resistance = 12 kΩ
APPLICATION RESISTOR
RATIO MATCHING
0.5
0.5
0.5
0.5
0.5
05
% max
Matching Between RA, RB, RC
DIGITAL INPUTS
VIH (Input High Voltage)
VIL (Input Low Voltage)
IIN (Input Current)
CIN (Input Capacitance)2
POWER SUPPLY4
VDD Range
VSS Range
Power Supply Rejection
∆Gain/∆VDD
∆Gain/∆VSS
IDD
ISS
2.4
2.4
2.4
2.4
0.8
0.8
0.8
0.8
±1
±1
±1
±1
7
7
7
7
2.4
2.4
0.8
0.8
±1
±1
7
7
V min
V max
µA max
pF max
Digital Inputs at 0 V and VDD
14.25/15.75 14.25/15.75 14.25/15.75 14.25/15.75 14.25/15.75 14.25/15.75 V min/V max
–14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 –14.25/–15.75 V min/V max
± 0.01
± 0.01
6
4
± 0.01
± 0.01
6
4
± 0.01
± 0.01
6
4
± 0.01
± 0.01
6
4
± 0.01
± 0.01
6
4
± 0.01
± 0.01
6
4
% per % max
% per % max
mA max
mA max
VDD = +15 V ± 5%, VREF = –10 V
VSS = –15 V ± 5%.
VOUT Unloaded
VOUT Unloaded
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for Design Guidance and are not subject to test.
DYNAMIC PERFORMANCE
Output Voltage Settling Time 5
5
5
5
5
5
Slew Rate
Digital-to-Analog
Glitch Impulse
11
11
11
11
55
55
55
55
Multiplying Feedthrough
5
5
5
5
Error3
Unity Gain Small Signal
Bandwidth
600
600
600
600
11
11
55
55
5
5
600
600
Full Power Bandwidth
175
175
175
175
175
175
Total Harmonic Distortion –90
–90
–90
–90
OUTPUT CHARACTERISTICS5
Open Loop Gain
85
85
85
85
–90
–90
85
85
Output Voltage Swing
± 10
± 10
± 10
± 10
Output Resistance
0.2
0.2
0.2
0.2
Short Circuit Current @ +25°C 11
11
11
11
Output Noise Voltage
(0.1 Hz to 10 Hz) @ +25°C 2
2
2
2
f = 10 Hz
250
250
250
250
f = 100 Hz
100
100
100
100
f = 1 kHz
50
50
50
50
f = 10 kHz
50
50
50
50
f = 100 kHz
50
50
50
50
± 10
± 10
0.2
0.2
11
11
2
2
250
250
100
100
50
50
50
50
50
50
NOTES
1Temperature ranges are as follows: J, K Versions: 0°C to +70°C; A, B Versions: –40°C to +85°C; S, T Versions: –55°C to +125°C.
2Guaranteed by design and characterization, not production tested.
3The metal lid on the ceramic D-24A package is connected to Pin 12 (DGND).
4The device is functional with a power supply of ± 12 V.
5Minimum specified load resistance is 2 kΩ.
Specifications subject to change without notice.
–2–
µs max
V/µs typ
nV–s typ
mV p-p typ
kHz typ
kHz typ
dB typ
dB min
V min
Ω typ
mA typ
µV rms typ
nV/√Hz typ
nV/√Hz typ
nV/√Hz typ
nV/√Hz typ
nV/√Hz typ
To 0.01% of Full-Scale Range
VOUT Load = 2 kΩ, 100 pF.
DAC Register Alternately Loaded
with All 0s and All 1s. Typically
2.5 µs at 25°C.
VOUT Load = 2 kΩ, 100 pF.
Measured with VREF = 0 V.
DAC Register Alternately Loaded
with All 0s and All 1s.
VREF = ±10 V, 10 kHz Sine Wave
DAC Register Loaded with All 0s.
VOUT, RFB Connected. DAC Loaded
with All 1s VREF = 100 mV p-p
Sine Wave.
VOUT, RFB Connected. DAC Loaded
with All 1s. VREF = 20 V p-p
Sine Wave. RL = 2 kΩ.
VREF = 6 V rms, 1 kHz Sine Wave.
VOUT, RFB Not Connected
VOUT = ±10 V, RL = 2 kΩ
RL = 2 kΩ, CL = 100 pF
RFB, VOUT Connected,
VOUT Shorted to AGND
Includes Noise Due to Output
Amplifier and Johnson Noise
of RFB
REV. B
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