ANALOG DEVICES AD872A Service Manual
Complete 12-Bit 10 MSPS
a
SMD/883B
Scope
This specification covers the detail requirements for a complete monolithic 12-bit, 10 MSPS A/D converter with an on-chip, high performance track-and-hold amplifier (THA) and voltage reference. The
electrical specifications match the Standard Microcircuit Drawing (SMD) 5962-93060 in effect at the
release of this data sheet. For a copy of the latest official SMD, contact DESC-ELDS.
Part Number/Case Outline
For case outline dimensions, see Package Information Appendix of General Specification ADI-M-1000.
The complete part numbers of these SMD and 883 devices are as follows:
Device SMD ADI 883B Package Package Designation
Type Part Number Part Number Description ADI MIL-STD-1835
01 5962-9306001MXA AD872ASD/883B 28-Pin Side Brazed DIP D-28 CDIP2-T28
02 5962-9306002MYA AD872ASE/883B 44-Terminal LCC E-44A CQCCI-N44
Absolute Maximum Ratings
AV
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to +6.5 V
DD
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.5 V to +0.5 V
AV
SS
DRV
DV
DD,
DRV
DD to DVDD
DRGND to DGND
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1 V to +1 V
to DVDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.5 V to +6.5 V
AV
DD
Clock Input, OEN
Digital Outputs to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to DV
REF IN to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AV
V
, to V
INA
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Lead Temperature (Soldering 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
2
to DGND, DRGND2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to +6.5 V
DD
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.5 V to +6.5 V
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to +0.3 V
2
to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to DVDD + 0.5 V
, REF IN to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.5 V to +6.5 V
INB
(TA = +25°C unless otherwise noted)
Monolithic A/D Converter
AD872A
1
+ 0.3 V
DD
to AV
SS
DD
Recommended Operating Conditions
2
Operating Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
Thermal Characteristics
Thermal Resistance, Junction-to-Case (θJC) for D-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28°C/W
Thermal Resistance, Junction-to-Ambient (θ
Thermal Resistance, Junction-to-Case (θ
Thermal Resistance, Junction-to-Ambient (θ
NOTES
1
Permanent damage may occur if any absolute maximum rating is exceeded. Functional operation is not implied and device
reliability may be impaired by exposure to higher-than-recommended voltages for extended periods of time.
2
Device Type 02 only.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for
its use, nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
) for D-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
JA
) for E-44A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20°C/W
JC
) for E-44A . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
JA
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1997
AD872A–SPECIFICA TIONS
Table 1. Electrical Performance Characteristics
Conditions
= +5 V, AVSS = –5 V,
AV
DD
= +5 V, DRVDD = +5 V Group A Device Limits
DV
DD
Test Symbol unless otherwise specified Subgroups Type Min Max Units
Resolution RES 1, 2, 3 01, 02 12 Bits
Differential Nonlinearity
Zero Error B
Gain Error A
Zero Error Drift TCB
Gain Error Drift TCA
Gain Error Drift TCA
Power Supply Rejection PSR See Note 2 1, 2, 3 01, 02 0.125 ±% FSR
Analog Input Range V
Input Resistance R
Input Capacitance C
Internal Reference Output Voltage V
Power Dissipation PD 1, 2, 3 01, 02 1.3 W
1
DNL All Codes Histogram 1, 2, 3 01, 02 12 Bits
POE
E
IN
IN
IN
REF
POE
INT
EXT
External 2.5 V Reference 2, 3 01, 02 0.30 ±% FSR
Internal 2.5 V Reference 2, 3 01, 02 1.75 ± % FSR
External 2.5 V Reference 2, 3 01, 02 0.5 ±% FSR
TA = +25°C 01, 02 50 typ kΩ
TA = +25°C 01, 02 10 typ pF
1 01, 02 0.75 ±% FSR
1 01, 02 1.25 ±% FSR
1, 2, 3 01, 02 1 ±V
1, 2, 3 01, 02 2.46 2.54 V
Power Supply Current IAV
DD
IAV
SS
IDV
IDRV
DD
DD
Signal-to-Noise and Distortion Ratio S/(N + D) f
Total Harmonic Distortion THD f
Logic Input High Voltage V
Logic Input Low Voltage V
Logic Input High Current (CLK) I
Logic Input Low Current (CLK) I
IH
IL
IH
IL
Logic Input High Current
(OEN, CLK) I
IH
Logic Input Low Current
(OEN, CLK) I
IL
Logic Output High Voltage
(MSB—Bit 12, OTR) V
OH
Logic Output Low Voltage
(MSB—Bit 12, OTR) V
Leakage I
Clock Period t
Output Delay t
OL
Z
C
OD
1, 2, 3 01, 02 92 mA
150
21
02 2
= 1 MHz; fS = 10 MHz 1, 2, 3 01 61 dB
IN
02 60
= 1 MHz; fS = 10 MHz 1, 2, 3 01 –62 dB
IN
02 –60
1, 2, 3 01, 02 2.0 V
1, 2, 3 01, 02 0.8 V
1, 2, 3 01 115 ±µA
1, 2, 3 01 115 ±µA
1, 2, 3 02 115 ±µA
1, 2, 3 02 115 ±µA
I
= 500 µA 1, 2, 3 01, 02 2.4 V
SOURCE
I
= 1.6 mA 1, 2, 3 01, 02 0.4 V
SINK
Three State 1, 2, 3 02 10 ±µA
See Figure 1. 9, 10, 11 01, 02 100 ns
See Figure 1. 9, 10, 11 01, 02 10 ns
NOTES
1
Minimum resolution for which “No Missing Codes” is guaranteed.
2
Test conditions for PSR: 4.75 V ≤ AVDD ≤ 5.25 V, –5.25 V ≤ AVSS ≤ –4.75 V, 4.75 V ≤ DVDD ≤ 5.25 V.
–2–
REV. B
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