DAC-HF10BMM [DATEL]

Digital-to-Analog Converters;


型号：	DAC-HF10BMM
厂家：	DATEL, Inc.
描述：	Digital-to-Analog Converters CD 转换器
文件：	总5页 (文件大小：200K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DAC-HF

Ultra-Fast, 8ꢁ10ꢁ12-Bit Digital-to-Analog Converters

FEATURES

8, 10 and 12-Bit resolutions

Settling times to 25ns

20ppmꢁ/C max. gain tempco

Unipolar or bipolar operation

Current output

Internal feedback resistors

High-reliability MIL-STD-883 models

PRODUCT OVERVIEW

INPUT/OUTPUT CONNECTIONS

The DAC-HF Series of hybrid DAC’s are ultra

high-speed, current output devices. They incorpo-

rate state-of-the-art performance in a miniature

The DAC-HF design combines proven hybrid

construction techniques with advanced circuit

design to realize high-speed current switching.

PIN FUNCTION

BIT 1 (MSB)

BIT 2

+15V SUPPLY

GROUND

package, achieving maximum output settling times The design incorporates fast PNP current switches

BIT 3

–15V SUPPLY

REFERENCE OUT

BIPOLAR OFFSET

10V RANGE

OUTPUT

of 25ns for the 8 and 10-bit models and 50ns

for the 12-bit model. They can be used to drive a

resistor load directly for up to 1ꢀ output or a fast

operational ampiﬁer (such as DATEL’s AM-500)

for higher voltage outputs with sub-microsecond

settling times. A tapped feedback resistor and a

bipolar offset resistor are included internally to

give ﬁve programmable output voltage ranges with

an external operational ampliﬁer.

driving a low-impedance R-2R thin-ﬁlm ladder

network. The nichrome thin-ﬁlm resistor network

is deposited by electron beam evaporation on a

lowcapacitance substrate to assure high-speed

performance. The resistors are then functionally

trimmed by laser for optimum linearity.

BIT 4

BIT 5

BIT 6

BIT 7

BIT 8

20V RANGE

REFERENCE IN

GROUND

BIT 9 *

BIT 10 *

BIT 11 *

BIT 12 (LSB) *

GROUND

* See note in Figure 1

BLOCK DIAGRAM

GROUNDS

13 14 15 23

+15V SUPPLY

–15V SUPPLY

REFERENCE OUT

(–10.05V±0.05V)

–10V

REFERENCE

BIPOLAR

OFFSET

THIN-FILM R-2R

17 20V RANGE

19 10V RANGE

18 OUTPUT

LADDER NETWORK

REFERENCE

CONTROL

CIRCUIT

FAST PNP

CURRENT SWITCHES

16 REFERENCE IN

BIT

9 10 811 127

9 170 11612

MSB

LSB

FOR DAC-HF10B, PINS 11 & 12 ARE NO CONNECTION

FOR DAC-HF8B, PINS 9, 10, 11 & 12 ARE NO CONNECTION

DIGITAL INPUTS

Figure 1. DAC-HF Functional Block Diagram

DATEL, Inc. 11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 USA

•

Tel: (508) 339-3000

•

www.datel.com

•

e-mail: help@datel.com

MDA_DAC-HF.B05 Page 1 of 5

DAC-HF

Ultra-Fast, 8ꢁ10ꢁ12-Bit Digital-to-Analog Converters

FUNCTIONAL SPECIFICATIONS

(Typical at +25/C and 15ꢀ supplies unless otherwise noted.)

ABSOLUTE MAXIMUM RATINGS

DESCRIPTION

10B

12B

PARAMETERS

Positive Supply, Pin 24

LIMITS

UNITS

ꢀolts

INPUTS

+18

–18

+15

300

Resolution, Bits

Negative Supply, Pin 22

ꢀolts

Coding, Unipolar Output

Coding, Bipolar Output

Input Logic Level, Bit ON ("1")

Input Logic Level, Bit OFF ("0")

Straight binary

Offset binary

Digital Input ꢀoltage, Pins 1–12

Lead Temperature (soldering, 10s)

+2.0ꢀ to +5.5ꢀ at +40μA

0ꢀ to +0.8ꢀ at –2.6mA

TECHNICAL NOTES

PERFORMANCE

1. Proper operation of the DAC-HF Series converters is dependent on good

board layout and connection practices. Bypass supplies as shown in the con-

nection diagrams. Mount bypass capacitors close to the converter, directly to

the supply pins where possible.

Nonlinearity Error, max.

0.012ꢂ

0.024ꢂ

to T

MAX

MIN

Differential Nonlinearity Error, max.

to T

0.012ꢂ

0.024ꢂ

MIN

MAX

2. Use of a ground plane is particularly important in highspeed DꢁA converters

as it reduces high-frequency noise and aids in decoupling the digital inputs

from the analog output. Avoid ground loop problems by connecting all grounds

on the board to the ground plane. The remainder of the ground plane should

include as much of the circuit board as possible.

Monotonicity

Guaranteed over oper. temp. range

20ppmꢁ/C

Gain Tempco, max.

Offset Tempco, Bipolar, max.

Zero Tempco, max.

10ppmꢁ/C of FSR ➁

1.5ppmꢁ/C of FSR ➁

Settling Time, ns max. ➂

Power Supply Sensitivity

3. When the converter is conﬁgured for voltage output with an external

operational ampliﬁer, keep the leads from the converter to the output ampliﬁer

as short as possible.

0.01ꢂꢁꢂ Supply

OUTPUTS

Output Current Range, Unipolar

Output Current Range, Bipolar

Output Compliance ꢀoltage

Output ꢀoltage Ranges ➀

0 to +5mA

2.5mA

1.2ꢀ 0

4. The high-speed current switching technique used in the DAC-HF Series

inherently reduces the amplitude and duration of large transient spikes at

the output (“glitches”). The most severe glitches occur at half-scale, the

major carry transition from 011 … 1 to 100 … 0 or vice versa. At this time, a

skewing of the input codes can create a transition state code of 111 … 1. The

duration of the “transition state code” is dependent on the degree of skewing,

but its effect is dependent on the speed of the DAC (an ultra-fast DAC will

respond to these brief spurious inputs to a greater degree than a slow DAC).

Minimize the effects of input skewing by using a highspeed input register to

match input switching times. The input register recommended for use with

the DAC-HF is easily implemented with two Texas Instruments SN74S174

hex D-type ﬂip-ﬂops. This register will reduce glitches to a very low level and

ensure fast output settling times.

to –5ꢀ 0

to –10ꢀ

2.5ꢀ

5ꢀ 10ꢀ

400 Ohms

10ꢂ

Output Resistance

Output Capacitance

15pF

Output Leakage Current, All Bits OFF

15nA

POWER REQUIREMENTS

Supply ꢀoltages

15ꢀ 0.5ꢀ

45mA

5. Test the DAC-HF using a low-capacitance test probe (such as a 10X probe).

Take care to assure the shortest possible connection between probe ground

and circuit ground. Long probe ground leads may pick up environmental E.M.I.

causing artifacts on the scope display, i.e., signals that do not originate at the

unit under test.

Positive Quiescent Current, max.

Negative Quiescent Current, max.

40mA

17mA

50mA

17mA

PHYSICAL/ENVIRONMENTAL

Operating Temperature Range, Case

0/C to +70/C (BMC, BMC-C)

–40/C to +100/C (BME, BME-C)

– 55/C to +125/C (BMM, BMM-C, 883)

–65/C to +150/C

6. Passive components used with the DAC-HF may be as indicated here:

0.1μF and 1μF bypass capacitors should be ceramic type and tantalum type

respectively; the 400ꢃ output load is a 0.1ꢂ, 10ppmꢁ/C, metal-ﬁlm type;

adjustment potentiometers are ceremet types; other resistors may be 10ꢂ

carbon composition types.

Storage Temperature Range

Package Type

24-pin ceramic DDIP

Weight

0.22 ounces (6.3 grams)

7. Output voltage compliance is 1.2ꢀ to preserve the linearity of the con-

verter. In the bipolar mode, the DAC-HF can be operated with no load to give

an output voltage of 1.0ꢀ. In the unipolar mode, the load resistance must be

less than 600ꢃ to give less than +1.2ꢀ output. The speciﬁed output currents

of 0 to +5mA and 2.5mA are measured into a short circuit or an operational

ampliﬁer summing junction.

Footnotes:

➀ With external operational ampliﬁer.

➁ FSR is Full Scale Range, or the difference between minimum and maximum

output values.

➂ Full-scale current change to 1LSB with 400ꢃ load.

DATEL, Inc. 11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 USA

•

Tel: (508) 339-3000

•

www.datel.com

•

e-mail: help@datel.com

MDA_DAC-HF.B05 Page 2 of 5

DAC-HF

Ultra-Fast, 8ꢁ10ꢁ12-Bit Digital-to-Analog Converters

+15V

1μF

CALIBRATION PROCEDURE

Unipolar Output Current

0.1μF

+15V

ZERO

1. Connect the converter as shown in Figure 2.

ADJUST

25k

BIT 1

2. Set all inputs low and adjust the ZERO ADJUST potentiometer for a reading

of 0ꢀ at the output.

–15V

OUTPUT

OUT

400 LOAD

(FOR 0 TO

+1V FS)

3. Set all inputs high and adjust the GAIN ADJUST potentiometer for a read-

ing of –F.S. + 1LSB (See Table 1).

Bipolar Output Current

1. Connect the converter as shown in Figure 3.

100

GAIN

ADJUST

2. Set all inputs low and adjust the OFFSET ADJUST and LOAD potentiometer

for an output reading of +F.S. (See Table 2).

3. Set all inputs high and adjust the GAIN ADJUST potentiometer for an

output reading of –F.S. + 1LSB (See Table 2).

BIT 12

–15V

+15V

1μF

0.1μF

1μF

0.1μF

Figure 2. DAC-HF Calibration Circuit

BIT 1

OUTPUT

OUT

Table 1. 12-Bit Unipolar Output Coding

ANALOG OUTPUT

100

200

370

INPUT CODING

LOAD

(444 NOMINAL)

(FOR 0 TO ±0.5V FS)

UNIPOLAR SCALE

OFFSET

ADJUST

STRAIGHT BINARY

0 TO 1V F.S. 0 TO –5V F.S. 0 TO –10V F.S.

–F.S. + 1LSB

–3ꢁ4F.S.

–1ꢁ2F.S.

–1ꢁ4F.S.

–1LSB

1111 1111 1111

1100 0000 0000

1000 0000 0000

0100 0000 0000

0000 0000 0001

0000 0000 0000

+0.9998ꢀ

+0.7500ꢀ

+0.5000ꢀ

+2.5000ꢀ

+0.0002ꢀ

0.0000ꢀ

–4.9988ꢀ

–3.7500ꢀ

–2.5000ꢀ

–1.2500ꢀ

–0.0012ꢀ

0.0000ꢀ

–9.9976ꢀ

–7.5000ꢀ

–5.0000ꢀ

–2.5000ꢀ

–0.0024ꢀ

0.0000ꢀ

100

GAIN

ADJUST

BIT 12

Table 2. 12-Bit Bipolar Output Coding

–15V

0.1μF

1μF

ANALOG OUTPUT

BIPOLAR

SCALE

INPUT CODING

OFFSET BINARY

±0.5V F.S. ±2.5V F.S.

±5V F.S.

–4.9976ꢀ

–2.5000ꢀ

–0.0024ꢀ

0.0000ꢀ

±10V F.S.

–9.9951ꢀ

–5.0000ꢀ

–0.0049ꢀ

0.0000ꢀ

Figure 3. Bipolar Current Output Connections

–F.S. + 1LSB

–1ꢁ2F.S.

–1LSB

1111 1111 1111 +0.4998ꢀ –2.4988ꢀ

1100 0000 0000 +0.1250ꢀ –1.2500ꢀ

1000 0000 0001 +0.0002ꢀ –0.0012ꢀ

1000 0000 0000

0.0000ꢀ

+1ꢁ2F.S.

+F.S. – 1LSB

+F.S.

0100 0000 0000 –0.1250ꢀ +1.2500ꢀ +2.5000ꢀ +5.0000ꢀ

0000 0000 0001 –0.4998ꢀ +2.4988ꢀ +4.9976ꢀ +9.9951ꢀ

0000 0000 0000 –0.5000ꢀ +2.5000ꢀ +5.0000ꢀ +10.0000ꢀ

Table 3. Programmable Output Range Pin Connections

OUTPUT VOLTAGE

RANGE

FEEDBACK

CONNECTIONS

CONNECT THESE

PINS TOGETHER

0 to –5ꢀ

0 to –10ꢀ

2.5ꢀ

PIN 19

PIN 17

PIN 17 to PIN 18 ꢁ PIN 20 to PIN 23

PIN 20 to PIN 23

PIN 17 to PIN 18 ꢁ PIN 20 to PIN 18

PIN 20 to PIN 18

5ꢀ

10ꢀ

PIN 20 to PIN 18

DATEL, Inc. 11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 USA

•

Tel: (508) 339-3000

•

www.datel.com

•

e-mail: help@datel.com

MDA_DAC-HF.B05 Page 3 of 5

DAC-HF

Ultra-Fast, 8ꢁ10ꢁ12-Bit Digital-to-Analog Converters

4k = 0.1%

BIPOLAR

OFFSET

REF OUT

(–10V = 2%)

2k7 FEEDBACK

(10V RANGE)

4k7 FEEDBACK

(20V RANGE)

18 OUTPUT

23 GROUND

4007ꢀ ±10%

50nsec/DIV

5mA

DAC-HF with AM-500, ±5V output full scale (10V) step

Figure 5. Voltage Output Waveforms

Figure 4. Equivalent Output Circuit

OUTPUT

STEP

TYPICAL SETTLING

TIME TO 1LSB

OUTPUT

STEP

TYPICAL SETTLING

TIME TO 1LSB

20V

10V

2μs

600ns

400ns

20V

10V

300ns

200ns

150ns

Figure 6. Unipolar Ultra-Fast Voltage Output Circuit

Figure 7. Unipolar Fast Voltage Output Circuit

DATEL, Inc. 11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 USA

•

Tel: (508) 339-3000

•

www.datel.com

•

e-mail: help@datel.com

MDA_DAC-HF.B05 Page 4 of 5

DAC-HF

Ultra-Fast, 8ꢁ10ꢁ12-Bit Digital-to-Analog Converters

MECHANICAL DIMENSIONS INCHES (mm)

1.31 MAX.

(33.27)

Dimension Tolerances (unless otherwise indicated):

2 place decimal (.XX) ±0.010 (±0.254)

3 place decimal (.XXX) ±0.005 (±0.127)

Lead Material: Kovar alloy

0.80 MAX.

(20.32)

Lead Finish: 50 microinches (minimum) gold plating

over 100 microinches (nominal) nickel plating

0.100 TYP.

(2.540)

1.100

(27.940)

0.235 MAX.

(5.969)

0.200 MAX.

(5.080)

+0.002

–0.001

0.010

(0.254)

0.190 MAX.

(4.826)

0.100

(2.540)

0.100

(2.540)

0.600 ±0.010

(15.240)

SEATING

PLANE

0.025

0.040

(1.016)

0.018 ±0.002

(0.457)

(0.635)

ORDERING INFORMATION

BITS ROHS MODEL NUMBER

OPERATING

TEMP. RANGE

OPERATING

TEMP. RANGE

MODEL NUMBER

BITS ROHS

DAC-HF8BMC

DAC-HF8BME

0 TO +70/C

DAC-HF12ꢁ883

–55 TO +125/C

0 TO +70/C

Yes

–40 TO +100/C

–55 TO +125/C

0 TO +70/C

DAC-HF8BMC-C

DAC-HF8BME-C

DAC-HF8BMM-C

DAC-HF10BMC-C

DAC-HF10BME-C

DAC-HF10BMM-C

DAC-HF12BMC-C

DAC-HF12BME-C

DAC-HF12BMM-C

DAC-HF12BMM-QL-C

DAC-HF12-Cꢁ883

DAC-HF8BMM

DAC-HF8ꢁ883

DAC-HF10BMC

DAC-HF10BMM

DAC-HF10BME

DAC-HF10ꢁ883

DAC-HF12BMC

DAC-HF12BME

DAC-HF12BMM

DAC-HF12BMM-QL

–40 TO +100/C

–55 TO +125/C

0 TO +70/C

–40 TO +100/C

–55 TO +125/C

0 TO +70/C

–55 TO +125/C

–40 TO +100/C

–55 TO +125/C

0 TO +70/C

–40 TO +100/C

–55 TO +125/C

–40 TO +100/C

–55 TO +125/C

DATEL is a registered trademark of DATEL, Inc.

11 Cabot Boulevard, Mansﬁeld, MA 02048-1151 USA

ITAR and ISO 9001/14001 REGISTERED

DATEL, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information

contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of

licenses to make, use, or sell equipment constructed in accordance therewith. Speciﬁcations are subject to change without notice.

www.datel.com • e-mail: help@datel.com

MDA_DAC-HF.B05 Page 5 of 5

DAC-HF10BMM [DATEL]

相关型号：

DAC-HF10BMM-C

DAC-HF10BMR

DAC-HF12-C/883

DAC-HF12-C883

DAC-HF12/883

DAC-HF12/883

DAC-HF12/883B

DAC-HF12883

DAC-HF12BMC

DAC-HF12BMC

DAC-HF12BMC-C

DAC-HF12BME