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ADS7957SRHBR

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Texas Instruments Analog To Digital Converters (ADCs), VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ADS7957SRHBR

Texas Instruments · Analog To Digital Converters (ADCs) · VQFN-32-EP(5x5)

ADS7957SRHBR from Texas Instruments, in a VQFN-32-EP(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 AGND power_in Analog ground.
2 MXO output Multiplexer output.
3 AINP input ADC input signal.
4 AINM input ADC input ground.
5 CH15 input Analog-input channel 15 for the multiplexer.
6 CH14 input Analog-input channel 14 for the multiplexer.
7 CH13 input Analog-input channel 13 for the multiplexer.
8 CH12 input Analog-input channel 12 for the multiplexer.
9 CH11 input Analog-input channel 11 for the multiplexer.
10 CH10 input Analog-input channel 10 for the multiplexer.
11 CH9 input Analog-input channel 9 for the multiplexer.
12 CH8 input Analog-input channel 8 for the multiplexer.
13 CH7 input Analog-input channel 7 for the multiplexer.
14 CH6 input Analog-input channel 6 for the multiplexer.
15 CH5 input Analog-input channel 5 for the multiplexer.
16 CH4 input Analog-input channel 4 for the multiplexer.
17 CH3 input Analog-input channel 3 for the multiplexer.
18 CH2 input Analog-input channel 2 for the multiplexer.
19 CH1 input Analog-input channel 1 for the multiplexer.
20 CH0 input Analog-input channel 0 for the multiplexer (default channel after power-up or reset).
21 +VA power_in Analog power supply, 2.7 V to 5.25 V recommended operating range.
22 AGND power_in Analog ground.
23 CS input Chip-select input, active low.
24 SCLK input Serial clock input, up to 20 MHz.
25 SDI input Serial data input.
26 SDO output Serial data output.
27 BDGND power_in Digital ground.
28 +VBD power_in Digital I/O supply, 1.7 V to +VA recommended operating range.
29 GPIO0 bidirectional Programmable general-purpose input or output that can alternatively serve as an active-high alarm output.
30 REFM input Reference ground.
31 REFP input Reference input; 2.5 V reference with a 10 µF ceramic decoupling capacitor to REFM.
32 +VA power_in Analog power supply, 2.7 V to 5.25 V recommended operating range.
33 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-32-EP(5x5)
Category ADC/DAC/Data Conversion
Pins 33

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
AINP or CHn to AGND -0.3 V 10
+VA to AGND, +VBD to BDGND -0.3 7 V 10
Digital input voltage to BDGND -0.3 7 V 10
Digital output to BDGND -0.3 V 10
Input current to any pin except supply pins -10 10 mA 10
Operating temperature -40 125 °C 10
Junction temperature (TJ Max) TJ 150 °C 10
Storage temperature (Tstg) Tstg -65 150 °C 10
Analog power-supply voltage V(+VA) 2.7 3.3 5.25 V 10
Digital I/O-supply voltage V(+VBD) 1.7 3.3 V 10
Reference voltage V(REF) 2 2.5 3 V 10
SCLK frequency ƒ(SCLK) 20 MHz 10
Operating temperature range TA -40 125 °C 10
Full-scale input span, Range 1 0 V Range 1 14
Full-scale input span, Range 2 0 V while 2xVREF ≤ +VA 14
Absolute input range, Range 1 -0.2 V Range 1 14
Absolute input range, Range 2 -0.2 V while 2xVREF ≤ +VA 14
Integral linearity -0.5 0.2 0.5 LSB 14
Differential linearity -0.5 0.2 0.5 LSB 14
Offset error -1.5 0.5 1.5 LSB Measured relative to an ideal full-scale input 14
Gain error, Range 1 -1 0.1 1 LSB Range 1 14
Alarm high threshold range 0 4092 LSB 14
Alarm low threshold range 0 4092 LSB 14
Logic low input voltage VIL 0.8 V +VBD = 5 V 15
Logic low input voltage VIL 0.4 V +VBD = 3 V 15
Low-level output voltage VOL 0.4 V At Isink = 200 μA 15
Analog power-supply voltage +VA 2.7 3.3 5.25 V 15
Digital I/O supply voltage +VBD 1.7 3.3 5.25 V 15
Supply current (normal mode), static state 1.05 1 mA At +VA = 2.7 to 3.6 V static state 15
Supply current (normal mode), 1 MHz throughput 2.3 3 mA At +VA = 4.7 to 5.25 V and 1 MHz throughput 15
Supply current (normal mode), static state 1.1 1.5 mA At +VA = 4.7 to 5.25 V static state 15
Junction-to-ambient thermal resistance RθJA 40.6 °C/W 11
Junction-to-case (top) thermal resistance RθJC(top) 32.1 °C/W 11
Junction-to-board thermal resistance RθJB 13.1 °C/W 11
Junction-to-top characterization parameter ψJT 0.8 °C/W 11
Junction-to-board characterization parameter ψJB 13 °C/W 11
Junction-to-case (bottom) thermal resistance RθJC(bot) 5.7 °C/W 11

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper • A copper fill area underneath the device ties the AGND, BDGND, AINM, and REFM pins together. This 52

CAD (KiCad official)

  • Symbol: ADS7957SRHBR
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: ads7957srhbr-etched.step / ads7957srhbr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ads7957srhbr.step / ads7957srhbr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (80 pp, sha256 89c0b3de229df440, retrieved 2026-10-28, tier: manufacturer)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF