The ADS1260-Q1 and ADS1261-Q1 (ADS126x-Q1) are precision, 40-kSPS, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) that include a programmable gain amplifier (PGA). The devices also include a precision voltage reference and internal fault monitors. The sensor-ready ADCs give a high-accuracy, single-chip solution for the most demanding measurements, for example, weigh scales and resistance temperature detectors (RTDs).
The ADCs contain an input signal multiplexer, a low-noise PGA (with gains from 1 to 128), a 24-bit ΔΣ modulator, a precision voltage reference, and a programmable digital filter.
The high-impedance PGA inputs (1 GΩ) decrease measurement error due to sensor loading. The ADS1260-Q1 supports three differential or five single-ended inputs. The ADS1261-Q1 supports five differential or ten single-ended inputs. The integrated current sources simplify the measurement of RTDs.
The flexible digital filter is programmable for single-cycle settled conversions. Signal and reference monitors, a temperature sensor, and CRC data verification enhance data reliability.
The ADS126x-Q1 are pin compatible devices given in a 5-mm × 5-mm VQFN package and are specified across the –40°C to +125°C temperature range.
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| Part number | Order | Resolution (Bits) | Sample rate (Max) (kSPS) | Number of input channels | Interface | Operating temperature range (C) | Package Group | Approx. price (US$) | Power consumption (Typ) (mW) | Package size: mm2:W x L (PKG) | Architecture | Input type | Multi-channel configuration | Reference mode | Features | Input range (Max) (V) | Input range (Min) (V) | Analog voltage AVDD (Min) (V) | Analog voltage AVDD (Max) (V) | Digital supply (Min) (V) | Digital supply (Max) (V) | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ADS1260-Q1 |
|
24 | 40 | 5 | SPI | -40 to 125 | VQFN | 32 | 7.67 | 1ku | 20 | 32VQFN: 25 mm2: 5 x 5 (VQFN | 32) | Delta-Sigma |
Differential
Single-Ended |
Multiplexed |
Ext
Int |
50/60 Hz Rejection
Excitation Current Sources (iDACs) GPIO Oscillator PGA Temp Sensor |
2.5
5 |
-2.5
0 |
-2.5
4.75 |
2.5
5.25 |
2.7 | 5.25 | Automotive |
| ADS1261-Q1 |
|
24 | 40 | 10 | SPI | -40 to 125 | VQFN | 32 | 8.85 | 1ku | 20 | 32VQFN: 25 mm2: 5 x 5 (VQFN | 32) | Delta-Sigma |
Differential
Single-Ended |
Multiplexed |
Ext
Int |
50/60 Hz Rejection
Excitation Current Sources (iDACs) GPIO Oscillator PGA Temp Sensor |
2.5
5 |
-2.5
0 |
-2.5
4.75 |
2.5
5.25 |
2.7 | 5.25 | Automotive |
