DC Specifications input capacitance leakage current input impedance

DC Specifications: input capacitance, leakage current, input impedance, reference voltage range, INL, and DNL TIPL 4001 TI Precision Labs – ADCs Created by Art Kay Presented by Peggy Liska

Analog Input: Input Capacitance PARAMETER TEST CONDITION MIN TYP MAX UNIT ANALOG INPUT CIN Input capacitance In sample mode In hold mode 60 4 p. F 2

Analog Input: Input Leakage Current PARAMETER TEST CONDITION MIN TYP MAX UNIT ANALOG INPUT IIL Input leakage current ± 1 µA 3

Analog Input: Input Impedance 4

Reference Input: Reference Input Voltage Range All specifications are for AVDD = 1. 8 V, DVDD = 1. 8 V, VREF = 5 V, and f. DATA = 2 Msps, unless otherwise noted PARAMETER ANALOG INPUT VREF Reference Input Voltage Range TEST CONDITION MIN 2. 5 TYP MAX 5. 0 UNIT V 5

Reference Input: Reference current PARAMETER EXTERNAL REFERENCE INPUT Reference input current Input leakage Current CREF Decoupling capacitor at the reference input TEST CONDITION MIN During conversion, 1 MHz sample rate, midcode 10 TYP MAX UNIT 300 µA 250 22 p. A µF 6

System Performance: Ideal Transfer Function Where VLSB = The minimum resolvable voltage width FSR = Full Scale Range N = Number of bits 7

System Performance: Differential Nonlinearity (DNL) W[k] the measured code width. T[k] The voltage level where a code transitions Q Ideal code width 8

System Performance: No Missing Code (NMC) PARAMETER SYSTEM PERFORMANCE NMC Integral Nonlinearity TEST CONDITION AVDD = 3 V MIN 12 TYP MAX UNIT Bits 9

Differential Nonlinearity (DNL) vs. Code PARAMETER ADS 9110 SYSTEM PERFORMANCE DNL Differential Nonlinearity TEST CONDITION AVDD = 1. 8 V MIN -0. 75 TYP ± 0. 4 MAX +0. 75 UNIT LSB 10

System Performance: Integral Nonlinearity (INL) 11

INL Data Sheet Specification PARAMETER ADS 9110 SYSTEM PERFORMANCE INL Integral Nonlinearity TEST CONDITION AVDD = 3 V MIN -1. 5 TYP ± 0. 5 MAX UNIT 1. 5 LSB 12

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