AD7818ARM(2000) 查看數據表（PDF） - Analog Devices

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AD7818ARM
(Rev.:2000)

Single- and 4-Channel, 9 μ
s, 10-Bit ADCs with On-Chip Temperature Sensor

Analog Devices 

AD7816/AD7817/AD7818

AD7816/AD7818 –SPECIFICATIONS 6

1 (VDD = +2.7 V to +5.5 V, GND = 0 V, REFIN = +2.5 V unless

otherwise noted)

Parameter

A Version Units

Test Conditions/Comments

DYNAMIC PERFORMANCE (AD7818 Only)

Signal to (Noise + Distortion) Ratio2

Total Harmonic Distortion2

Peak Harmonic or Spurious Noise2

Intermodulation Distortion2

Second Order Terms

Third Order Terms

Channel-to-Channel Isolation2

DC ACCURACY (AD7818 Only)

Resolution

Minimum Resolution for Which

No Missing Codes Are Guaranteed

Relative Accuracy2

Differential Nonlinearity2

Gain Error2

Offset Error2

TEMPERATURE SENSOR1

Measurement Error

Ambient Temperature +25°C

TMIN to TMAX

Measurement Error

Ambient Temperature +25°C

TMIN to TMAX

Temperature Resolution

REFERENCE INPUT3, 4 (AD7816 Only)

REFIN Input Voltage Range3

Input Impedance

Input Capacitance

ON-CHIP REFERENCE5

Temperature Coefficient3

CONVERSION RATE

Track/Hold Acquisition Time4

Conversion Time

Temperature Sensor

Channel 1

57

–65

–67

–67

–67

–80

10

10

±1

±1

± 10

±4

±2

±3

±2

±3

1/4

2.625

2.375

50

10

30

400

27

9

dB min

dB max

dB typ

dB typ

dB typ

dB typ

Bits

Bits

LSB max

LSB max

LSB max

LSB max

Sample Rate = 100 kSPS, Any

Channel, fIN = 20 kHz

–75 dB typ

–75 dB typ

fa = 19.9␣ kHz, fb = 20.1␣ kHz

fIN = 20 kHz

Any Channel

°C max

°C max

°C max

°C max

°C/LSB

External Reference VREF = 2.5 V

On-Chip Reference

V max

V min

kΩ min

pF max

ppm/°C typ

2.5 V + 5%

2.5 V – 5%

Nominal 2.5 V

ns max

µs max

µs max

Source Impedance < 10 Ω

(AD7818 Only)

POWER REQUIREMENTS

VDD

IDD

Normal Operation

Using External Reference

Power-Down

Auto Power-Down Mode

10 SPS Throughput Rate

1 kSPS Throughput Rate

10 kSPS Throughput Rate

Power-Down

+5.5

V max

For Specified Performance

+2.7

V min

Logic Inputs = 0 V or VDD

2

mA max

1.3 mA typ

1.75

mA max

2.5 V External Reference Connected

2

µA max

500 nA typ

VDD = 3 V

4

µW typ

See Power vs. Throughput Section for

40

µW typ

Description of Power Dissipation in

400

µW typ

Auto Power-Down Mode

3

µW max

Typically 0.15 µW

REV. A

–3–

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