Datasheet > AD4685

AD4685

更新时间： 2023-12-20 18:44:48

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亚德诺 - ADI		/
页数	文件大小	规格书
32页	1427K
描述
500 kSPS、4通道16位双路同步采样SAR ADC

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AD4685 数据手册

Data Sheet

AD4684/AD4685

SPECIFICATIONS

V_CC= 3.0 V to 3.6 V, V_LOGIC= 1.65 V to 3.6 V, reference voltage (V_REF) = 2.5 V internal, sampling frequency (f_SAMPLE) = 1 MSPS (AD4684)

or 500 kSPS (AD4685), T_A= −40°C to +125°C, and no oversampling enabled, unless otherwise noted. R = 100 Ω (series with SDOA pin and

SDOB pin).

Table 1. Specifications

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

RESOLUTION

Bits

THROUGHPUT

Single Channel Pair

SEQ = 0

AD4684

AD4685

SEQ = 1

AD4684

AD4685

MSPS

kSPS

500

Alternating Channels

500

250

kSPS

DC ACCURACY

No Missing Codes

Differential Nonlinearity (DNL)

Integral Nonlinearity (INL)

Gain Error

Bits

−1.0

−3.5

−0.025

−3

±0.5

±1.5

±0.006

±1

+1.0

+3.5

+0.025

LSB

%FS

ppm/°C

%FS

Gain Error Temperature Drift

Gain Error Match

−0.025

−0.6

−3

±0.006

±0.1

±1

+0.025

+0.6

Offset Error

Offset Error Temperature Drift

Offset Error Match

AC ACCURACY

µV/°C

−0.5

0.12

+0.5

Input frequency (f_IN) = 1 kHz

V_REF= 3.3 V external

Dynamic Range

87.8

Oversampled Dynamic Range

Signal-to-Noise Ratio (SNR)

OSR_MODE = 1, OSR = 4, RES = 1

V_REF= 3.3 V external

91.5

87.5

85.5

83.5

OSR_MODE = 1, OSR = 8, RES = 1

f_IN= 100 kHz

85.3

−100

−99

Spurious-Free Dynamic Range (SFDR)

Total Harmonic Distortion (THD)

V_REF= 3.3 V external

−98

f_IN= 100 kHz

V_REF= 3.3 V

−96

Signal-to-Noise-and-Distortion (SINAD)

87.4

85.5

−109.7

−93.5

Channel to Channel Isolation

Channel to Channel Memory

ANALOG INPUT

Voltage Input Range

V_REF

DC Leakage Current

0.1

µA

Input Capacitance

When in track mode

When in hold mode

SAMPLING DYNAMICS

Input Bandwidth

At −0.1 dB

At −3 dB

5.3

MHz

Aperture Delay

Aperture Delay Match

Aperture Jitter

300

450

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