AD7538KN datasheet(4/16 Pages) AD

部件名	AD7538KN

功能描述	LC2MOS Microprocessor-Compatible 14-Bit DAC

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制造商	AD [Analog Devices]

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AD7538

Rev. B | Page 4 of 16

AC PERFORMANCE CHARACTERISTICS

These characteristics are included for design guidance only and are not subject to test. VDD = 11.4 V to 15.75 V, VREF = 10 V, VPIN3 = VPIN4 =

0 V, VSS = 0 V or −300 mV, output amplifier is AD711 except where noted.

Table 2.

Parameter

TA = 25°C

TA = TMIN, TMAX

Unit

Test Conditions/Comments

Output Current Settling Time

1.5

μs max

To 0.003% of full-scale range

IOUT load= 100 Ω, CEXT = 13 pF DAC register alternately loaded

with all 1s and all 0s; typical value of settling time is 0.8 μs

Digital-to-Analog Glitch Impulse

20

nV-sec typ

Measured with VREF = 0 V. IOUT load = 100 Ω, CEXT = 13 pF; DAC

register alternately loaded with all 1s and all 0s

Multiplying Feedthrough Error

3

5

mV p-p typ

VREF = ±10 V, 10 kHz sine wave DAC

Register loaded with all 0s

Power Supply Rejection

ΔGain/ΔVDD

±0.01

±0.02

% per % max

ΔVDD = ±5%

Output Capacitance

COUT (Pin 3)

260

pF max

DAC register loaded with all 1s

COUT (Pin 3)

130

pF max

DAC register loaded with all 0s

Output Noise Voltage Density

(10 Hz to 100 kHz)

15

nV√Hz typ

Measured between RFB and IOUT

TIMING CHARACTERISTICS

VDD = 11.4 V to 15.75 V, VREF = 10 V, VPIN3 = VPIN4 = 0 V, VSS = 0 V or −300 mV. All specifications TMIN to TMAX unless otherwise noted. See

Figure 2 for a timing diagram.

Table 3.

Parameter1

Limit at

TA = +25°C

Limit at TA = 0°C to +70°C

TA = −25°C to +85°C

Limit at

TA = −55°C to +125°C

Unit

Test Conditions/Comments

t1

0

ns min

CS to WR setup time

t2

0

ns min

CS to WR hold time

t3

170

200

240

ns min

LDAC pulse width

t4

170

200

240

ns min

Write pulse width

t5

140

160

180

ns min

Data setup time

t6

20

30

ns min

Data hold time

1 Temperature range as follows: J, K Versions: 0°C to +70°C

A, B Versions: −25°C to +85°C

S, T Versions: −55°C to +125°C

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