AD7111 datasheet(2/8 Pages) AD

2 / 8 page

AD7111L/C/U Grades

AD7111K/B/T Grades

Parameter

TA = +25 CTA = TMIN, TMAX

Units

Conditions/Comments

NOMINAL RESOLUTION

0.375

ACCURACY RELATIVE TO

0 dB ATTENUATION

0.375 dB Steps:

Accuracy

≤ ± 0.17 dB

0 to 36

0 to 30

dB min

Guaranteed Attenuation Ranges

Monotonic

0 to 54

0 to 48

dB min

for Specified Step Sizes

0.75 dB Steps:

Accuracy

≤ ± 0.35 dB

0 to 48

0 to 42

0 to 36

dB min

Monotonic

0 to 72

0 to 66

0 to 72

0 to 60

dB min

1.5 dB Steps:

Accuracy

≤ ±0.7 dB

0 to 54

0 to 48

0 to 42

dB min

Full Range Is from 0 dB

Monotonic

Full Range

0 to 78

0 to 85.5

0 to 72

dB min

to 88.5 dB

3.0 dB Steps:

Accuracy

≤ ±1.4 dB

0 to 66

0 to 54

0 to 60

0 to 48

dB min

Monotonic

Full Range

dB min

6.0 dB Steps:

Accuracy

≤ ±2.7 dB

0 to 72

0 to 60

0 to 48

dB min

Monotonic

Full Range

dB min

GAIN ERROR

±0.1

±0.15

± 0.15

± 0.20

dB max

VIN INPUT RESISTANCE

9/11/15

7/11/18

Ω min/typ/max

RFB INPUT RESISTANCE

9.3/11.5/15.7 9.3/11.5/15.7

7.3/11.5/18.8 7.3/11.5/18.8

Ω min/typ/max

DIGITAL INPUTS

VIH (Input High Voltage)

2.4

V min

VIL (Input Low Voltage)

0.8

V max

Input Leakage Current

±1

±10

± 1

± 10

µA max

Digital Inputs = VDD

SWITCHING CHARACTERISTICS

tCS

ns min

Chip Select to Write Setup Time

tCH

ns min

Chip Select to Write Hold Time

tWR

350

500

350

500

ns min

Write Pulse Width

tDS

175

250

175

250

ns min

Data Valid to Write Setup Time

tDH

ns min

Data Valid to Write Hold Time

tRFSH

4.5

µs min

Refresh Time

POWER SUPPLY

VDD

IDD

mA max

Digital Inputs = VIL or VIH

500

1000

500

1000

µA max

Digital Inputs = 0 V or VDD;

See Figure 6

NOTE

1Sample tested at +25

°C to ensure compliance.

Specifications subject to change without notice.

AD7111–ELECTRICAL CHARACTERISTICS

REV. 0

–2–

AD7111/AD7111A–SPECIFICATIONS

(VDD = +5 V, VIN = –10 V dc, IOUT = AGND = DGND = O V output amplifier

AD711 except where noted)

AC PERFORMANCE CHARACTERISTICS These characteristics are included for design guidance only and are not subject

to test. VDD = +5 V, VIN = –10 V dc except where noted, IOUT = AGND = DGND = O V, output amplifier AD711 except where noted.

AD7111L/C/U Grades

AD7111K/B/T Grades

Parameter

TA = +25 CTA = TMIN, TMAX

TA = +25 CTA = TMIN, TMAX Units

Conditions/Comments

DC Supply Rejection,

∆Gain/∆V

0.001

0.005

0.001

0.005

dB per % max

∆V

DD = ± 10%, Input Code = 00000000

Propagation Delay

3.0

4.5

3.0

4.5

µs max

Full-Scale Change Measured from

Going High, CS = 0 V

Digital-to-Analog Glitch Impulse

100

nV secs typ

Measured with AD843 as Output

Amplifier for Code Transition

10000000 to 00000000

C1 of Figure 1 is 0 pF

Output Capacitance, Pin 1

185

pF max

Input Capacitance, Pin 15 and Pin 16

pF max

Feedthrough at 1 kHz

–94

–72

–94

–68

dB max

Total Harmonic Distortion

–91

dB typ

VIN = 6 V rms at 1 kHz

Output Noise Voltage Density

nV/

√Hz max

Includes AD711 Amplifier Noise

Digital Input Capacitance

pF max

Specifications subject to change without notice.

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