ADS7883_14 Datasheet, PDF (3/20 Pages) Texas Instruments – 12-BIT, 3-MSPS, MICROPOWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTER

ADS7883
www.ti.com ....................................................................................................................................................................................................... SLAS594 – JULY 2008
ELECTRICAL SPECIFICATIONS
V_DD = 2.7 V to 5.5 V, T_A = –40°C to 125°C, f_sample = 2 MSPS for V_DD = 2.7 V to 4.5 V, f_sample = 3 MSPS for V_DD = 4.5 V to 5.5
V
PARAMETER
ANALOG INPUT
Full-scale input voltage span⁽¹⁾
Absolute input voltage range
C_I
Input capacitance⁽²⁾
I_Ilkg
Input leakage current
SYSTEM PERFORMANCE
Resolution
No missing codes
ADS7883SB
ADS7883S
INL
Integral nonlinearity
ADS7883SB
ADS7883S
DNL Differential nonlinearity
E_O
Offset error^(4)(5)(6)
E_G
Gain error⁽⁵⁾
SAMPLING DYNAMICS
ADS7883SB
ADS7883S
Conversion time
Acquisition time
Maximum throughput rate
Aperture delay
DYNAMIC CHARACTERISTICS
THD
Total harmonic distortion⁽⁷⁾
SINAD Signal-to-noise and distortion
SFDR Spurious free dynamic range
Full power bandwidth
DIGITAL INPUT/OUTPUT
Logic family — CMOS
V_IH
High-level input voltage
V_IL
Low-level input voltage
V_OH
High-level output voltage
V_OL
Low-level output voltage
POWER SUPPLY REQUIREMENTS
+V_DD Supply voltage
TEST CONDITIONS
+IN
T_A = 125°C
32-MHz SCLK, V_DD = 3 V
48-MHz SCLK, V_DD = 5 V
32-MHz SCLK, V_DD = 3 V
48-MHz SCLK, V_DD = 5 V
32-MHz SCLK, V_DD = 2.7 V to 4.5 V
48-MHz SCLK, V_DD = 4.5 V to 5.5 V
f_I = 100 kHz
f_I = 100 kHz, ADS7883SB
f_I = 100 kHz, ADS7883S
f_I = 100 kHz
At –3 dB
V_DD = 2.7 V to 3.6 V
V_DD = 3.6 V to 5.5 V
V_DD = 2.7 V to 3.6 V
V_DD = 3.6 V to 5.5 V
At I_source = 200 µA
At I_sink = 200 µA
MIN TYP
MAX UNIT
0
–0.2
V_DD V
V_DD+0.2 V
27
pF
40
nA
12
12
11
–1 ±0.6
–2 ±0.75
–1 ±0.5
–2 ±0.75
–3 ±0.2
–3.5 ±0.3
Bits
Bits
1 _LSB(3)
2
1
LSB
2
3 LSB
3.5 LSB
398 422
265 281
78
52
10
ns
ns
2
MHz
3
ns
–84
69
72
68
70
86
30
dB
dB
dB
MHz
1.5
2.2
V_DD–0.2
2.7 3.3
5.5
V
5.5
0.4
V
0.8
V
0.4
5.5 V
(1) Ideal input span; does not include gain or offset error
(2) Refer to Figure 24 for details on sampling circuit
(3) LSB means least significant bit
(4) Measured relative to an ideal full-scale input
(5) Offset error and gain error ensured by characterization
(6) First transition of 000H to 001H at (V_ref/2¹⁰)
(7) Calculated on the first nine harmonics of the input frequency
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): ADS7883
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