DAC312 Analog Devices, DAC312 Datasheet

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DAC312

Manufacturer Part Number
DAC312
Description
12-Bit High Speed Multiplying D/A Converter
Manufacturer
Analog Devices
Datasheet

Specifications of DAC312

Resolution (bits)
12bit
Dac Update Rate
n/a
Dac Settling Time
250ns
Max Pos Supply (v)
+18V
Single-supply
No
Dac Type
Current Out
Dac Input Format
Par

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a
GENERAL DESCRIPTION
The DAC312 series of 12-bit multiplying digital-to-analog con-
verters provide high speed with guaranteed performance to
0.012% differential nonlinearity over the full commercial oper-
ating temperature range.
The DAC312 combines a 9-bit master D/A converter with a
3-bit (MSBs) segment generator to form an accurate 12-bit D/A
converter at low cost. This technique guarantees a very uniform
step size (up to 1/2 LSB from the ideal), monotonicity to
12-bits and integral nonlinearity to 0.05% at its differential cur-
rent outputs. In order to provide the same performance with a
12-bit R-2R ladder design, an integral nonlinearity over tem-
perature of 1/2 LSB (0.012%) would be required.
The 250 ns settling time with low glitch energy and low power
consumption are achieved by careful attention to the circuit de-
sign and stringent process controls. Direct interface with all
popular logic families is achieved through the logic threshold
terminal.
REV. C
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.
FEATURES
Differential Nonlinearity:
Nonlinearity: 0.05%
Fast Settling Time: 250 ns
High Compliance: –5 V to +10 V
Differential Outputs: 0 to 4 mA
Guaranteed Monotonicity: 12 Bits
Low Full-Scale Tempco: 10 ppm/ C
Circuit Interface to TTL, CMOS, ECL, PMOS/NMOS
Low Power Consumption: 225 mW
Industry Standard AM6012 Pinout
Available In Die Form
1/2 LSB
FUNCTIONAL BLOCK DIAGRAM
High compliance and low drift characteristics (as low as
10 ppm/ C) are also features of the DAC312 along with an ex-
cellent power supply rejection ratio of .001% FS/% V. Oper-
ating over a power supply range of +5/–11 V to 18 V the
device consumes 225 mW at the lower supply voltages with an
absolute maximum dissipation of 375 mW at the higher supply
levels.
With their guaranteed specifications, single chip reliability and
low cost, the DAC312 device makes excellent building blocks
for A/D converters, data acquisition systems, video display driv-
ers, programmable test equipment and other applications where
low power consumption and complete input/output versatility
are required.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
12-Bit High Speed Multiplying
20-Pin Hermetic DIP (R-Suffix),
20-Pin Plastic DIP (P-Suffix),
20-Pin SOL (S-Suffix)
PIN CONNECTIONS
D/A Converter
© Analog Devices, Inc., 1996
DAC312
Fax: 617/326-8703

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DAC312 Summary of contents

Page 1

... Hermetic DIP (R-Suffix), 20-Pin Plastic DIP (P-Suffix), High compliance and low drift characteristics (as low as 10 ppm/ C) are also features of the DAC312 along with an ex- cellent power supply rejection ratio of .001% FS/% V. Oper- ating over a power supply range of +5/– the ...

Page 2

... Reference Input Slew Rate dl/dt Propagation Delay PLH PHL Settling Time t S Full-Scale TC IFS (@ 1.0 mA REF for DAC312F, DAC312H, unless otherwise noted. Output characteristics refer to both I and I .) OUT OUT DAC312E Min Typ Max 12 12 0.0125 2 0.5 0. ...

Page 3

... ELECTRICAL CHARACTERISTICS DAC312F, DAC312H, unless otherwise noted. Output characteristics refer to both I Parameter Symbol Conditions Logic Input Levels “0” GND IL LC Logic Input Levels “1” GND IH LC Logic Input Current – + Logic Input Swing ...

Page 4

... GND +13 +16.5 V, V– = –15 V V– = –13 – 1.0 mA REF 1.0 mA REF 2.44 mm, 8.74 sq. mm) –4– DAC312N DAC312G Limit Limit Units 12 12 Bits min 12 12 Bits min 0.05 0.05 %FS max +10 +10 V max –5 –5 V min 4 ...

Page 5

... ABSOLUTE MAXIMUM RATINGS Operating Temperature DAC312E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +70 C DAC312F, DAC312H . . . . . . . . . . . . . . . . . . – +85 C Junction Temperature . . . . . . . . . . . . . . . . . . . . – +150 C Storage Temperature (Tj – +125 C Lead Temperature (Soldering, 60 sec 300 C Power Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – +18 V Analog Current Outputs . . . . . . . . . . . . . . . . . . . . – +12 V ...

Page 6

... DAC312 TYPICAL PERFORMANCE CHARACTERISTICS Output Current vs. Output Voltage (Output Voltage Compliance) Power Supply Current vs. Power Supply Voltage Reference Amplifier Small-Signal Frequency Response Reference Amplifier Common-Mode Range Power Supply Current vs. Temperature Reference Amplifier Large-Signal Frequency Response –6– Output Compliance vs. Temperature True and Complementary Output Operation Gain Accuracy vs ...

Page 7

... BASIC CONNECTIONS Negative Low Impedance Output Operation Accommodating Bipolar References Basic Positive Reference Operation REV. C Positive Low Impedance Output Operation Basic Negative Reference Operation Recommended Full-Scale Adjustment Circuit Pulsed Reference Operation –7– DAC312 ...

Page 8

... DAC312 BASIC CONNECTIONS Code Format Output Scale Offset Binary; Positive Full-Scale True Zero Output. Positive Full-Scale –LSB +LSB Zero-Scale –LSB Negative Full-Scale +LSB Negative Full-Scale 2s Complement; Positive Full-Scale True Zero Output Positive Full-Scale –LSB MSB Complemented +1 LSB (Need Inverter at B1). Zero-Scale – ...

Page 9

... DAC312 LSB OUT 3.999 0.000 9.9976 3.998 0.001 9.9951 0.001 3.998 0.0024 0.000 3.999 0.0000 0.000 3.999 9.9976 ...

Page 10

... This enables direct interface with +15 V CMOS logic, even REF required, full scale when the DAC312 is powered from supply. Minimum input logic swing and minimum logic threshold voltage are given by: V– plus (I be adjusted over a wide range by placing an appropriate voltage ...

Page 11

... CRT deflection and in other balanced applications such as driving center-tapped coils and transformers. POWER SUPPLIES The DAC312 operates over a wide range of power supply volt- ages from a total supply When operating with V– supplies of – less recommended. Low ...

Page 12

... DAC312 DIFFERENTIAL VS. INTEGRAL NONLINEARITY Integral nonlinearity, for the purposes of the discussion, refers to the “straightness”of the line drawn through the individual re- sponse points of a data converter. Differential nonlinearity, on the other hand, refers to the deviation of the spacing of the adja- cent points from a 1 LSB ideal spacing. Both may be expressed as either a percentage of full-scale output or as fractional LSBs or both ...

Page 13

... DESCRIPTION OF OPERATION The DAC312 is divided into two major sections segment generator and a 9-bit master/slave D/A converter. In operation the device performs as follows (see Simplified Schematic). The three most significant bits (MSBs) are inputs to a 3-to-8 line decoder. The selected resistor (R5 in the figure) is con- nected to the master/slave 9-bit D/A converter ...

Page 14

Fast A/D Converter Outline Dimensions Dimension shown in inches and (mm). 20-Lead Plastic DIP (N-20) 20-Lead Cerdip (Q-20) 20-Lead Wide Body SOL (R-20) –14– ...

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