AD7760BCP 查看數據表（PDF） - Analog Devices

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AD7760BCP

2.5 MSPS, 20-Bit Σ∆ ADC

Analog Devices 

Preliminary Technical Data

AD7760

AD7760—SPECIFICATIONS

Table 1. VDD1 = 2.5 V, VDD2 = 5 V, VREF = 4.096 V, TA = +25°C, Full Power Mode, unless otherwise noted

Parameter

Test Conditions/Comments

Specifcation

DYNAMIC PERFORMANCE

Decimate by 256

MCLK = 24.576MHz, ODR = 48kHz, FIN = 1kHz Sine Wave

Signal to Noise Ratio (SNR) 1

118

Spurious Free Dynamic Range (SFDR) 1 Non-harmonic

118

Total Harmonic Distortion (THD) 1

Input Amplitude = -6dB

-100

Intermodulation Distortion (IMD) 1

-100

Decimate by 16

MCLK = 40MHz, ODR = 1.25MHz, FIN =100kHz Sine Wave

Signal to Noise Ratio (SNR) 1

103

Spurious Free Dynamic Range (SFDR) 1 Non-harmonic

103

Total Harmonic Distortion (THD) 1

Input Amplitude = -6dB

-100

Intermodulation Distortion (IMD) 1

-100

Decimate by 8

MCLK = 40MHz, ODR = 2.5MHz, FIN = 100kHz Sine Wave

Signal to Noise Ratio (SNR) 1

100

Spurious Free Dynamic Range (SFDR) 1 Non-harmonic

100

Total Harmonic Distortion (THD) 1

Input Amplitude = -6dB

-100

Intermodulation Distortion (IMD) 1

FIN = 100kHz Sine Wave

-100

Intermodulation Distortion (IMD) 1

FIN = 1MHz Sine Wave

-100

DC ACCURACY

Resolution

Integral Nonlinearity1

Differential Nonlinearity1

Offset Error1

Gain Error1

Offset Error Drift

Gain Error Drift

At 18 bits

Guaranteed monotonic to 20 bits

20

1

1

0.03

5

0.0006

0.1

DIGITAL FILTER RESPONSE

Decimate by 8

Group Delay

MCLK = 40MHz

12

Decimate by 16

Group Delay

MCLK = 40MHz

24

Decimate by 128

Group Delay

MCLK = 24.576MHz

480

ANALOG INPUT

Differential Input Voltage

DC Leakage Current

Input Capacitance

Vin(+) – Vin(-), VREF = 2.5V

Vin(+) – Vin(-), VREF = 4.096V

With internal buffer

±2

±3.25

±2

5

With external buffer

55

REFERENCE INPUT/OUTPUT

VREF Input Voltage

VREF Input DC Leakage Current

VREF Input Capacitance

POWER REQUIREMENTS

AVDD1 (Modulator Supply)

AVDD2 (General Supply)

AVDD3 (Diff-Amp Supply)

AVDD4 (Ref Buffer Supply)

DVDD

VDRIVE

VDD3 = 3.3V

VDD3 = 5V

±5%

±5%

±5%

+2.5

+4.096

±1

5

+2.5

+5

+3.0/+5.5

+3.15/+5.25

+2.5

+1.65/+2.7

Unit

dB typ

dBFS typ

dB typ

dB typ

dB typ

dBFS typ

dB typ

dB typ

dB typ

dBFS typ

dB typ

dB typ

dB typ

Bits

LSB typ

LSB typ

% typ

LSB typ

% /°C

LSB /°C

µS typ

µS typ

µS typ

V pk-pk

V pk-pk

µA max

pF typ

pF typ

Volts

Volts

µA max

pF max

Volts

Volts

V min/max

V min/max

Volts

V min/max

Rev. PrN | Page 3 of 22

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