ISL26134AVZ-T7A Intersil, ISL26134AVZ-T7A Datasheet - Page 7

• Manufacturer Part Number: ISL26134AVZ-T7A
• Description: Analog to Digital Converters - ADC ISL26134AVZ LW-NOISE 24BIT DELTASIGMA ADC
• Manufacturer: Intersil

Specifications of ISL26134AVZ-T7A

• Product Category: Analog to Digital Converters - ADC
• Rohs: yes
• Number Of Channels: 4
• Architecture: Sigma-Delta
• Conversion Rate: 80 sps
• Resolution: 24 bit
• Input Type: Differential
• Snr: No
• Interface Type: Serial (2-Wire)
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 105 C
• Package / Case: TSSOP-28
• Maximum Power Dissipation: 68 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: External

Noise Performance
The ISL26132 and ISL26134 provide excellent noise
performance. The noise performance on each of the gain
settings of the PGA at the selected word rates is shown in
Tables 5 and 6.
Resolution in bits decreases by 1-bit if the ADC is operated as a
single-ended input device. Noise measurements are
input-referred, taken with bipolar inputs under the specified
operating conditions, with f
NOTES:
10. The peak-to-peak noise number is 6.6 times the rms value. This
11. Noise-Free Bits is defined as: Noise-Free Bits = ln(FSR/peak-to-peak
GAIN
128
64
1
2
encompasses 99.99% of the noise excursions that may occur. This
value best represents the worst case noise that could occur in the
output conversion words from the converter.
noise)/ln(2) where FSR is the full scale range of the converter,
VREF/Gain.
GAIN
128
64
1
2
RMS NOISE
TABLE 5. A
TABLE 6. A
10.8
10.2
243
148
(nV)
RMS NOISE
28.3
(nV)
565
285
27
VDD
VDD
= 5V, V
= 5V, V
PEAK-TO-PEAK NOISE
(nV) (Note 10)
PEAK-TO-PEAK NOISE
CLK
REF
REF
1604
(nV) (Note 10)
7
977
= 4.9152MHz.
71
67
= 5V, DATA RATE = 10Sps
= 5V, DATA RATE = 80Sps
3730
1880
187
178
NOISE-FREE BITS
ISL26132, ISL26134
NOISE-FREE BITS
(Note 11)
(Note 11)
21.6
21.3
20.1
19.1
20.4
20.3
18.7
17.7
September 9, 2011
FN6954.1