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AD7537 Datasheet(PDF) 2 Page - Analog Devices

Part No. AD7537
Description  LC2MOS (84) Loading Dual 12-Bit DAC
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7537 Datasheet(HTML) 2 Page - Analog Devices

   
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REV. 0
–2–
AD7537–SPECIFICATIONS
(VDD = +12 V to +15 V,
10%, VREFA = VREFB = 10 V; IOUTA = AGND = 0 V,
IOUTB = AGNDB = 0 V. All specifications TMIN to TMAX unless otherwise noted.)
AC PERFORMANCE CHARACTERISTICS
These characteristics are included for Design Guidance only and are not subject to test.
(VDD = +12 V to +15 V; VREFA = VREFB = +10 V; IOUTA = AGNDA = 0 V, IOUTB = AGNDB = 0 V. Output Amplifiers are AD644 except where noted.)
Parameter
TA = +25 CTA = TMIN, TMAX
Units
Test Conditions/Comments
Output Current Settling Time
1.5
µs max
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 0.8
µs.
Digital-to-Analog Glitch lmpulse
7
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
4
VREFA to IOUTA
–70
–65
dB max
VREFA, VREFB = 20 V p-p 10 kHz sine wave.
VREFB to IOUTB
–70
–65
dB max
DAC registers loaded with all 0s.
Power Supply Rejection
∆Gain/∆V
DD
±0.01
±0.02
% per % max
∆V
DD = VDD max – VDD min
Output Capacitance
COUTA
70
70
pF max
DAC A, DAC B loaded with all 0s
COUTB
70
70
pF max
COUTA
140
140
pF max
DAC A, DAC B loaded with all 1s
COUTB
140
140
pF max
Channel-to-Channel Isolation
VREFA to IOUTB
–84
dB typ
VREFA = 20 V p-p 10 kHz sine wave, VREFB = 0 V.
Both DACs loaded with all 1s.
VREFB to IOUTA
–84
dB typ
VREFB = 20 V p-p 10 kHz sine wave, VREFA = 0 V.
Both DACs loaded with all 1s.
Digital Crosstalk
7
nV-s typ
Measured for a Code Transition of all 0s to all 1s.
IOUTA, IOUTB load = 100 Ω, CEXT = 13 pF.
Output Noise Voltage Density
25
nV/
√Hz typ
Measured between RFBA and IOUTA or RFBB and IOUTB.
(10 Hz–100 kHz)
Frequency of measurement is 10 Hz–100 kHz.
Total Harmonic Distortion
–82
dB typ
VIN = 6 V rms, 1 kHz. Both DACs loaded with all 1s.
NOTES
1Temperature range as follows:
J, K, L Versions: –40
°C to +85°C;
A, B, C Versions: –40
°C to +85°C;
S, T, U Versions: –55
°C to +125°C
Specifications subject to change without notice.
2Sample tested at +25
°C to ensure compliance.
3Functional at V
DD = 5 V, with degraded specifications.
4Pin 12 (DGND) on ceramic DIPs is connected to lid.
J, A
K, B
L, C
S
T
U
Parameter
Versions
Versions
Versions
Version
Version
Version
Units
Test Conditions/Comments
ACCURACY
Resolution
12
12
12
12
12
12
Bits
Relative Accuracy
± 1
±1/2
±1/2
± 1
±1/2
±1/2
LSB max
Differential Nonlinearity
± 1
± 1
± 1
± 1
± 1
± 1
LSB max
All grades guaranteed mono-
tonic over temperature.
Gain Error
± 6
± 3
± 1
± 6
± 3
± 2
LSB max
Measured using RFBA, RFBB.
Both DAC registers loaded
with all 1s.
Gain Temperature Coefficient
2;
∆Gain/∆Temperature
± 5
± 5
± 5
± 5
± 5
± 5
ppm/
°C max Typical value is 1 ppm/°C
Output Leakage Current
IOUTA
+25
°C
10
10
10
10
10
10
nA max
DAC A Register loaded
TMIN to TMAX
150
150
150
250
250
250
nA max
with all 0s
IOUTB
+25
°C
10
10
10
10
10
10
nA max
DAC B Register loaded
TMIN to TMAX
150
150
150
250
250
250
nA max
with all 0s
REFERENCE INPUT
Input Resistance
999999k
Ω min
Typical Input Resistance = 14 k
20
20
20
20
20
20
k
Ω max
VREFA, VREFB
Input Resistance Match
± 3
± 3
± 1
± 3
± 3
± 1
% max
Typically
±0.5%
DIGITAL INPUTS
VIH (lnput High Voltage)
2.4
2.4
2.4
2.4
2.4
2.4
V min
VIIL (Input Low Voltage)
0.8
0.8
0.8
0.8
0.8
0.8
V max
IIN (Input Current)
+25
°C
± 1
± 1
± 1
± 1
± 1
± 1
µA max
VIN = VDD
TMIN to TMAX
±10
±10
±10
±10
±10
±10
µA max
CIN (lnput Capacitance)
2
10
10
10
10
10
10
pF max
POWER SUPPLY
3
VDD
10.8/16.5
10.8/16.5
10.8/16.5
10.8/16.5
10.8/16.5
10.8/16.5
V min/V max
IDD
222222mA max


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