Changes to Ordering Guide .......................................................... 32
10/06—Revision 0: Initial Version
Rev. A | Page 2 of 32
Data Sheet
SPECIFICATIONS
AD7612
AVDD = DVDD = 5 V; OVDD = 2.7 V to 5.5 V; VCC = 15 V; VEE = −15 V; V
REF
= 5 V; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
Voltage Range, V
IN
Conditions/Comments
Min
16
−0.1
−0.1
−5.1
−10.1
−0.1
75
220
1
Typ
Max
Unit
Bits
V
V
V
V
V
dB
μA
Analog Input CMRR
Input Current
Input Impedance
THROUGHPUT SPEED
Complete Cycle
Throughput Rate
Time Between Conversions
Complete Cycle
Throughput Rate
Complete Cycle
Throughput Rate
DC ACCURACY
Integral Linearity Error
3
No Missing Codes
3
Differential Linearity Error
3
Transition Noise
Zero Error (Unipolar or Bipolar)
Zero Error Temperature Drift
Bipolar Full-Scale Error
Unipolar Full-Scale Error
Full-Scale Error Temperature Drift
Power Supply Sensitivity
AC ACCURACY
Dynamic Range
V
IN+
− V
IN−
= 0 V to 5 V
V
IN+
− V
IN−
= 0V to 10 V
V
IN+
− V
IN−
= ±5 V
V
IN+
− V
IN−
= ±10 V
V
IN−
to AGND
f
IN
= 100 kHz
V
IN
= ±5 V, ±10 V @ 750 kSPS
See
Analog Inputs
section
In warp mode
In warp mode
In warp mode
In normal mode
In normal mode
In impulse mode
In impulse mode
+5.1
+10.1
+5.1
+10.1
+0.1
1
0
0
−1.5
16
−1
−35
±1
−50
−70
±0.75
1.33
750
2
1
1.67
600
2
500
+1.5
+1.5
0.55
+35
+50
+70
±1
3
μs
kSPS
ms
μs
kSPS
μs
kSPS
LSB
4
Bits
LSB
LSB
LSB
ppm/°C
LSB
LSB
ppm/°C
LSB
dB
5
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
ns
ps rms
ns
V
ppm/°C
ppm/V
ppm
ms
AVDD = 5 V ± 5%
V
IN
= 0 V to 5 V, f
IN
= 2 kHz, −60 dB
V
IN
= 0 V to 10 V, ±5 V, f
IN
= 2 kHz, −60 dB
V
IN
= ±10 V, f
IN
= 2 kHz, −60 dB
V
IN
= 0 V to 5 V, 0 V to 10 V, f
IN
= 2 kHz
V
IN
= ±5 V, ±10 V, f
IN
= 2 kHz
V
IN
= ±5 V, f
IN
= 2 kHz
V
IN
= 0 V to 10 V, ±5 V, f
IN
= 2 kHz
V
IN
= ±10 V, f
IN
= 2 kHz
f
IN
= 2 kHz
f
IN
= 2 kHz
V
IN
= 0 V to 5 V
92.5
Signal-to-Noise Ratio
Signal-to-(Noise + Distortion) (SINAD)
92
Total Harmonic Distortion
Spurious-Free Dynamic Range
–3 dB Input Bandwidth
Aperture Delay
Aperture Jitter
Transient Response
INTERNAL REFERENCE
Output Voltage
Temperature Drift
Line Regulation
Long-Term Drift
Turn-On Settling Time
93.5
94
94.5
93
94
92.5
93
93.5
−107
107
45
2
5
500
Full-scale step
PDREF = PDBUF = low
REF @ 25°C
–40°C to +85°C
AVDD = 5 V ± 5%
1000 hours
C
REF
= 22 μF
4.965
5.000
±3
±15
50
10
5.035
Rev. A | Page 3 of 32
AD7612
Parameter
REFERENCE BUFFER
REFBUFIN Input Voltage Range
EXTERNAL REFERENCE
Voltage Range
Current Drain
TEMPERATURE PIN
Voltage Output
Temperature Sensitivity
Output Resistance
DIGITAL INPUTS
Logic Levels
V
IL
V
IH
I
IL
I
IH
DIGITAL OUTPUTS
Data Format
Pipeline Delay
6
V
OL
V
OH
POWER SUPPLIES
Specified Performance
AVDD
DVDD
OVDD
VCC
VEE
Operating Current
8, 9
AVDD
With Internal Reference
With Internal Reference Disabled
DVDD
OVDD
VCC
VEE
Power Dissipation
With Internal Reference
With Internal Reference Disabled
In Power-Down Mode
10
TEMPERATURE RANGE
11
Specified Performance
1
2
Data Sheet
Conditions/Comments
PDREF = high
PDREF = PDBUF = high
REF
750 kSPS throughput
@ 25°C
Min
2.4
4.75
Typ
2.5
5
250
311
1
4.33
Max
2.6
AVDD + 0.1
Unit
V
V
μA
mV
mV/°C
kΩ
−0.3
2.1
−1
−1
Parallel or serial 16-bit
I
SINK
= 500 μA
I
SOURCE
= –500 μA
+0.6
OVDD + 0.3
+1
+1
V
V
μA
μA
0.4
OVDD − 0.6
V
V
4.75
7
4.75
2.7
7
−15.75
@ 750 kSPS throughput
5
5
15
−15
5.25
5.25
5.25
15.75
0
V
V
V
V
V
VCC = 15 V, with internal reference buffer
VCC = 15 V
VEE = −15 V
@ 750 kSPS throughput
PDREF = PDBUF = low
PDREF = PDBUF = high
PD = high
T
MIN
to T
MAX
−40
19.5
18
6.5
0.5
3
2.3
2
205
190
10
230
210
mA
mA
mA
mA
mA
mA
mA
mW
mW
μW
°C
+85
With V
IN
= 0 V to 5 V or 0 V to 10 V ranges, the input current is typically 70 μA. In all input ranges, the input current scales with throughput. See the Analog Inputs section.
All specified performance is guaranteed up to 750 kSPS throughout, however throughputs up to 900 kSPS can be used with some linearity performance degradation.
3
Linearity is tested using endpoints, not best fit. All linearity is tested with an external 5 V reference.
4
LSB means least significant bit. All specifications in LSB do not include the error contributed by the reference.
5
All specifications in decibels are referred to a full-scale range input, FSR. Tested with an input signal at 0.5 dB below full-scale, unless otherwise specified.
6
Conversion results are available immediately after completed conversion.
7
4.75 V or V
REF
– 0.1 V, whichever is larger.
8
Tested in parallel reading mode.
9
With internal reference, PDREF = PDBUF = low; with internal reference disabled, PDREF = PDBUF = high. With internal reference buffer, PDBUF = low.
10
With all digital inputs forced to OVDD.
11
Consult sales for extended temperature range.
Rev. A | Page 4 of 32
Data Sheet
TIMING SPECIFICATIONS
AD7612
AVDD = DVDD = 5 V; OVDD = 2.7 V to 5.5 V; VCC = 15 V; VEE = −15 V; V
REF
= 5 V; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 3.
Parameter
CONVERSION AND RESET (See Figure 33 and Figure 34)
Convert Pulse Width
Time Between Conversions
Warp Mode/Normal Mode/Impulse Mode
1
CNVST Low to BUSY High Delay
BUSY High All Modes (Except Master Serial Read After Convert)
Warp Mode/Normal Mode/Impulse Mode
Aperture Delay
End of Conversion to BUSY Low Delay
Conversion Time
Warp Mode/Normal Mode/Impulse Mode
Acquisition Time
Warp Mode/Normal Mode/Impulse Mode
RESET Pulse Width
PARALLEL INTERFACE MODES (See Figure 35 and Figure 37)
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PCB Design
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