AD7937AR View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
AD7937AR Datasheet PDF : 8 Pages
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AD7937–SPECIFICATIONS (VDD = 5 V ؎ 10%, VREFA = VREFB = 10 V; IOUTA = AGNDA = 0 V, IOUTB = AGNDB = 0 V. All
specifications TMIN to TMAX unless otherwise noted.)
Parameter
ACCURACY
Resolution
Relative Accuracy
Differential Nonlinearity
Gain Error
Gain Temperature Coefficient2;
∆Gain/∆Temperature
Output Leakage Current
IOUTA
IOUTB
REFERENCE INPUT
Input Resistance
VREFA, VREFB
Input Resistance Match
DIGITAL INPUTS
VIH (Input High Voltage)
VIL (Input Low Voltage)
IIN (Input Current)
+25°C
TMIN to TMAX
CIN (Input Capacitance)2
POWER SUPPLY
VDD
IDD
A Version
12
±1
±1
±6
±5
5
10
5
10
9
20
±3
2.4
0.8
±1
± 10
10
4.5/5.5
2
0.1
B Version
12
± 1/2
±1
±3
±5
5
10
5
10
9
20
±3
2.4
0.8
±1
± 10
10
4.5/5.5
2
0.1
Unit
Bits
LSB max
LSB max
LSB max
ppm/°C max
nA max
nA max
nA max
nA max
kΩ min
kΩ max
% max
V min
V max
µA max
µA max
pF max
V min/V max
mA max
mA typ
Test Conditions/Comments
All grades guaranteed monotonic over temperature.
Measured using RFBA, RFBB. Both DAC registers loaded with all 1s.
Typical value is 1 ppm/°C.
DAC A Register loaded with all 0s.
DAC B Register loaded with all 0s.
Typical Input Resistance = 14 kΩ.
Typically ± 0.5%.
VIN = VDD.
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for Design Guidance only and are not subject to test.
(VDD = 5 V; VREFA = VREFB = 10 V; IOUTA = AGNDA = 0 V, IOUTB = AGNDB = 0 V. Output Amplifiers are AD644 except where noted.)
Parameter
Output Current Settling Time
TA = 25؇C
1
Unit
µs max
Test Conditions/Comments
To 0.01% of full-scale range. IOUT load = 100 Ω, CEXT = 13 pF. DAC output
measured from falling edge of WR. Typical Value of Settling Time is 0.6 µs.
Digital-to-Analog Glitch lmpulse 2.5
nV-s typ
Measured with VREFA = VREFB = 0 V. IOUTA, IOUTB load = 100 Ω, CEXT = 13 pF. DAC
registers alternately loaded with all 0s and all 1s.
AC Feedthrough
VREFA to IOUTA
VREFB to IOUTB
Power Supply Rejection
∆Gain/∆VDD
Output Capacitance
COUTA
COUTB
COUTA
COUTB
Channel-to-Channel Isolation
VREFA to IOUTB
VREFB to IOUTA
Digital Crosstalk
Output Noise Voltage Density
(10 Hz–100 kHz)
–70
–70
± 0.01
70
70
140
140
–84
–84
2.5
25
dB max
dB max
VREFA, VREFB = 20 V p-p 10 kHz sine wave.
DAC registers loaded with all 0s.
% per % max ∆VDD = VDD max – VDD min.
pF max
pF max
pF max
pF max
DAC A, DAC B loaded with all 0s.
DAC A, DAC B loaded with all 1s.
dB typ
dB typ
nV-s typ
nV/√Hz typ
VREFA = 20 V p-p 10 kHz sine wave, VREFB = 0 V. Both DACs loaded with all 1s.
VREFB = 20 V p-p 10 kHz sine wave, VREFA = 0 V. Both DACs loaded with all 1s.
Measured for a Code Transition of all 0s to all 1s. IOUTA, IOUTB load = 100 Ω,
CEXT = 13 pF.
Measured between RFBA and IOUTA or RFBB and IOUTB. Frequency of measurement
is 10 Hz–100 kHz.
Total Harmonic Distortion
–82
dB typ
NOTES
1Temperature range as follows: A, B Versions: –40°C to +85°C.
2Sample tested at 25°C to ensure compliance.
Specifications subject to change without notice.
VIN = 6 V rms, 1 kHz. Both DACs loaded with all 1s.
–2–
REV. 0
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