Datasheet > LTC2636IDE-H12#TRPBF

LTC2636IDE-H12#TRPBF

更新时间： 2023-02-26 16:10:22

品牌	Logo	应用领域
凌特 - Linear		光电二极管
页数	文件大小	规格书
24页	351K
描述
IC 12-BIT DAC, PDSO14, 4 X 3 MM, LEAD FREE, PLASTIC, MO-229WGED-3, DFN-14, Digital to Analog Converter

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LTC2636

OPERATION

POSITIVE

FSE

= V

REF

= V

REF

OUTPUT

VOLTAGE

OUTPUT

VOLTAGE

INPUT CODE

2636 F04

(c)

OUTPUT

VOLTAGE

2,048

4,095

INPUT CODE

(a)

NEGATIVE

OFFSET

INPUT CODE

(b)

Figure 4. Effects of Rail-to-Rail Operation On a DAC Transfer Curve (Shown for 12 Bits).

(a) Overall Transfer Function

(b) Effect of Negative Offset for Codes Near Zero

Rail-to-Rail Output Considerations

the LTC2636 GND pin to the ground plane should be as

low as possible. Resistance here will add directly to the

effective DC output impedance of the device (typically

0.1Ω). Note that the LTC2636 is no more susceptible to

this effect than any other parts of this type; on the con-

trary, it allows layout-based performance improvements

to shine rather than limiting attainable performance with

excessive internal resistance.

In any rail-to-rail voltage output device, the output is lim-

ited to voltages within the supply range.

SincetheanalogoutputoftheDACcannotgobelowground,

it may limit for the lowest codes as shown in Figure 4b.

Similarly, limiting can occur near full-scale when the REF

pin is tied to V . If V = V and the DAC full-scale error

REF

(FSE) is positive, the output for the highest codes limits

Another technique for minimizing errors is to use a sepa-

rate power ground return trace on another board layer.

The trace should run between the point where the power

supply is connected to the board and the DAC ground pin.

Thus the DAC ground pin becomes the common point for

analog ground, digital ground, and power ground. When

the LTC2636 is sinking large currents, this current ﬂows

out the ground pin and directly to the power ground trace

without affecting the analog ground plane voltage.

at V , as shown in Figure 4c. No full-scale limiting can

occur if V is less than V –FSE.

REF

Offset and linearity are deﬁned and tested over the region

of the DAC transfer function where no output limiting can

occur.

Board Layout

ThePCboardshouldhaveseparateareasfortheanalogand

digital sections of the circuit. A single, solid ground plane

should be used, with analog and digital signals carefully

routed over separate areas of the plane. This keeps digital

signals away from sensitive analog signals and minimizes

the interaction between digital ground currents and the

analog section of the ground plane. The resistance from

It is sometimes necessary to interrupt the ground plane

to conﬁne digital ground currents to the digital portion of

the plane. When doing this, make the gap in the plane only

as long as it needs to be to serve its purpose and ensure

that no traces cross over the gap.

2636f

1...18 19 202122 23 24

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与LTC2636IDE-H12#TRPBF相关器件

型号	品牌	获取价格	描述	数据表
LTC2636IDE-H8#TRPBF	Linear	获取价格	IC 8-BIT DAC, PDSO14, 4 X 3 MM, LEAD FREE, PLASTIC, MO-229WGED-3, DFN-14, Digital to Analo
LTC2636IDE-HMI10	Linear	获取价格	Octal 12-/10-/8-Bit SPI VOUT DACs with10ppm/°
LTC2636IDE-HMI12	Linear	获取价格	Octal 12-/10-/8-Bit SPI VOUT DACs with10ppm/°
LTC2636IDE-HMI12#PBF	Linear	获取价格	LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference; Package: DFN;
LTC2636IDE-HMI8	Linear	获取价格	Octal 12-/10-/8-Bit SPI VOUT DACs with10ppm/°
LTC2636IDE-HMX10	Linear	获取价格	Octal 12-/10-/8-Bit SPI VOUT DACs with10ppm/°
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LTC2636IDE-HMX8	Linear	获取价格	Octal 12-/10-/8-Bit SPI VOUT DACs with10ppm/°
LTC2636IDE-HMX8#TR	Linear	获取价格	IC,D/A CONVERTER,OCTAL,8-BIT,CMOS,LLCC,14PIN
LTC2636IDE-HZ10	Linear	获取价格	Octal 12-/10-/8-Bit SPI VOUT DACs with10ppm/°

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