AD7840–SPECIFICATIONS
Parameter
DYNAMIC PERFORMANCE
2
Signal to Noise Ratio
3
(SNR)
J, A
1
76
K, B
1
78
–80
–80
Total Harmonic Distortion (THD) –78
Peak Harmonic or Spurious Noise
DC ACCURACY
Resolution
Integral Nonlinearity
Differential Nonlinearity
Bipolar Zero Error
Positive Full Scale Error
5
Negative Full Scale Error
5
REFERENCE OUTPUT
6
REF OUT @ +25°C
REF OUT TC
Reference Load Change
(∆REF OUT vs.
∆I)
REFERENCE INPUT
Reference Input Range
Input Current
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Current (CS Input Only)
Input Capacitance, C
IN7
ANALOG OUTPUT
Output Voltage Range
DC Output Impedance
Short-Circuit Current
AC CHARACTERISTICS
7
Voltage Output Settling Time
Positive Full-Scale Change
Negative Full-Scale Change
Digital-to-Analog Glitch Impulse
Digital Feedthrough
POWER REQUIREMENTS
V
DD
V
SS
I
DD
I
SS
Power Dissipation
–78
(V
DD
= +5 V 5%, V
SS
= –5 V 5%, AGND = DGND = O V, REF IN = +3 V, R
L
= 2 k ,
C
L
= 100 pF. All specifications T
MIN
to T
MAX
unless othewise noted.)
S
1
76
–78
–78
Units
dB min
dB max
dB max
Test Conditions/Comments
V
OUT
= 1 kHz Sine Wave, f
SAMPLE
= 100 kHz
Typically 82 dB at +25°C for 0 < V
OUT
< 20 kHz
4
V
OUT
= 1 kHz Sine Wave, f
SAMPLE
= 100 kHz
Typically –84 dB at +25°C for 0 < V
OUT
< 20 kHz
4
V
OUT
= 1 kHz Sine Wave, f
SAMPLE
= 100 kHz
Typically –84 dB at +25°C for 0 < V
OUT
< 20 kHz
4
14
±
2
±
0.9
±
10
±
10
±
10
2.99
3.01
±
60
–1
2.85
3.15
50
2.4
0.8
±
10
±
10
10
±
3
0.1
20
14
±
1
±
0.9
±
10
±
10
±
10
2.99
3.01
±
60
–1
2.85
3.15
50
2.4
0.8
±
10
±
10
10
±
3
0.1
20
14
±
2
±
0.9
±
10
±
10
±
10
2.99
3.01
±
60
–1
2.85
3.15
50
2.4
0.8
±
10
±
10
10
±
3
0.1
20
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
V min
V max
ppm/°C max
mV max
V min
V max
µA
max
V min
V max
µA
max
µA
max
pF max
V nom
Ω
typ
mA typ
Guaranteed Monotonic
Reference Load Current Change (0–500
µA)
3 V
±
5%
V
DD
= 5 V
±
5%
V
DD
= 5 V
±
5%
V
IN
= 0 V to V
DD
V
IN
=V
SS
to V
DD
4
4
10
2
+5
–5
14
6
100
4
4
10
2
+5
–5
14
6
100
4
4
10
2
+5
–5
15
7
110
µs
max
µs
max
nV secs typ
nV secs typ
V nom
V nom
mA max
mA max
mW max
Settling Time to within
±
1/2 LSB of Final Value
Typically 2
µs
Typically 2.5
µs
±
5% for Specified Performance
±
5% for Specified Performance
Output Unloaded, SCLK = +5 V. Typically 10 mA
Output Unloaded, SCLK = +5 V. Typically 4 mA
Typically 70 mW
NOTES
1
Temperature ranges are as follows: J, K Versions, 0°C to +70°C; A, B Versions, –25°C to +85°C; S Version, –55°C to +125°C.
2
V
OUT
(pk-pk) =
±
3 V
3
SNR calculation includes distortion and noise components.
4
Using external sample-and-hold (see Testing the AD7840).
5
Measured with respect to REF IN and includes bipolar offset error.
6
For capacitive loads greater than 50 pF, a series resistor is required (see Internal Reference section).
7
Sample tested @ +25°C to ensure compliance.
Specifications subject to change without notice.
–2–
REV. B
AD [ ANALOG DEVICES ]
