Datasheet

REV. 0
–2–
AD7237A/AD7247A–SPECIFICATIONS
(V
DD
= +12 V to +15 V,
1
V
SS
= 0 V or –12 V to –15 V,
1
AGND =
DGND = 0 V [AD7237A], GND = 0 V [AD7247A], REF IN = +5 V,
Parameter A
2
B
2
T
2
Units Test Conditions/Comments
STATIC PERFORMANCE
Resolution 12 12 12 Bits
Relative Accuracy
3
±1 ±1/2 ±1/2 LSB max
Differential Nonlinearity
3
±0.9 ±0.9 ±0.9 LSB max Guaranteed Monotonic
Unipolar Offset Error
3
±3 ±3 ±4 LSB max V
SS
= 0 V or –12 V to –15 V
4
. DAC Latch Contents All 0s
Bipolar Zero Error
3
±6 ±4 ±6 LSB max V
SS
= –12 V to –15 V
4
. DAC Latch Contents
1000 0000 0000
Full-Scale Error
3, 5
±5 ±5 ±6 LSB max
Full-Scale Mismatch
5
±1 ±1 ±1 LSB typ
REFERENCE OUTPUT
REF OUT 4.97/5.03 4.97/5.03 4.95/5.05 V min/max
Reference Temperature
Coefficient ±25 ±25 ±25 ppm/°C typ
Reference Load Change
(∆REF OUT vs. ∆I) –1 –1 –1 mV max Reference Load Current Change (0-100 µA)
REFERENCE INPUT
Reference Input Range 4.75/5.25 4.75/5.25 4.75/5.25 V min/max 5 V ± 5%
Input Current
6
±5 ±5 ±5 µA max
DIGITAL INPUTS
Input High Voltage, V
INH
2.4 2.4 2.4 V min
Input Low Voltage, V
INL
0.8 0.8 0.8 V max
Input Current
I
IN
(Data Inputs) ±10 ±10 ±10 µA max V
IN
= 0 V to V
DD
Input Capacitance
6
8 8 8 pF max
ANALOG OUTPUTS
Output Range Resistors 15/30 15/30 15/30 kΩ min/max
Output Voltage Ranges
7
+5, +10 +5, +10 V Single Supply; (V
SS
= 0 V)
Output Voltage Ranges
7
+5, +10, ±5 +5, +10, ±5 +5, +10, ±5 Dual Supply; (V
SS
= –12 V to –15 V
4
)
DC Output Impedance 0.5 0.5 0.5 Ω typ
AC CHARACTERISTICS
6
Voltage Output Settling Time Settling Time to Within ±1/2 LSB of Final Value
Positive Full-Scale Change 8 8 10 µs max DAC Latch all 0s to all 1s. Typically 5 µs
Negative Full-Scale Change 8 8 10 µs max DAC Latch all 1s to all 0s. Typically 5 µs
V
SS
= –12 V to –15 V
4
.
Digital-to-Analog Glitch
Impulse
3
30 30 30 nV secs typ DAC Latch Contents Toggled Between all 0s and all 1s
Digital Feedthrough
3
10 10 10 nV secs typ
Digital Crosstalk
3
30 30 30 nV secs typ
POWER REQUIREMENTS
V
DD
+10.8/+16.5 +11.4/+15.75 +11.4/+15.75 V min/max For Specified Performance Unless Otherwise Stated
V
SS
–10.8/–16.5 –11.4/–15.75 –11.4/–15.75 V min/max For Specified Performance Unless Otherwise Stated
I
DD
15 15 15 mA max Output Unloaded. Typically 10 mA
I
SS
(Dual Supplies) 5 5 5 mA max Output Unloaded. Typically 3 mA
NOTES
1
Power Supply tolerance is ±10% for A version and ±5% for B and T versions.
2
Temperature ranges are as follows: A, B Versions, –40°C to +85°C; T Version, –55°C to +125°C.
3
See Terminology.
4
With appropriate power supply tolerances.
5
Measured with respect to REF IN and includes unipolar/bipolar offset error.
6
Sample tested @ +25°C to ensure compliance.
7
0 V to +10 V range is only available with V
DD
≥ 14.25 V.
Specifications subject to change without notice.
R
L
= 2 kΩ, C
L
= 100 pF. All specifications T
MIN
to T
MAX
unless otherwise noted.)